ad7192.c revision f6aea5543021c341f0397b191243fecca98ac595
17a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* 27a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * AD7190 AD7192 AD7195 SPI ADC driver 37a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * 4f316983fe033ba090b2f82fb9912aae9412d2372Michael Hennerich * Copyright 2011-2012 Analog Devices Inc. 57a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * 67a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * Licensed under the GPL-2. 77a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich */ 87a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 97a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/interrupt.h> 107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/device.h> 117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/kernel.h> 127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/slab.h> 137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/sysfs.h> 147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/spi/spi.h> 157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/regulator/consumer.h> 167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/err.h> 177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/sched.h> 187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include <linux/delay.h> 197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2006458e277eac2b8761b0a04d3c808d57be281a2eJonathan Cameron#include <linux/iio/iio.h> 2106458e277eac2b8761b0a04d3c808d57be281a2eJonathan Cameron#include <linux/iio/sysfs.h> 2206458e277eac2b8761b0a04d3c808d57be281a2eJonathan Cameron#include <linux/iio/buffer.h> 2306458e277eac2b8761b0a04d3c808d57be281a2eJonathan Cameron#include <linux/iio/trigger.h> 2406458e277eac2b8761b0a04d3c808d57be281a2eJonathan Cameron#include <linux/iio/trigger_consumer.h> 25a648232dc5ed840c6dab0a949450ee4cdf5830bdLars-Peter Clausen#include <linux/iio/triggered_buffer.h> 267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#include "ad7192.h" 287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Registers */ 307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_COMM 0 /* Communications Register (WO, 8-bit) */ 317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_STAT 0 /* Status Register (RO, 8-bit) */ 327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_MODE 1 /* Mode Register (RW, 24-bit */ 337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_CONF 2 /* Configuration Register (RW, 24-bit) */ 347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_DATA 3 /* Data Register (RO, 24/32-bit) */ 357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_ID 4 /* ID Register (RO, 8-bit) */ 367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_GPOCON 5 /* GPOCON Register (RO, 8-bit) */ 377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_OFFSET 6 /* Offset Register (RW, 16-bit 387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * (AD7792)/24-bit (AD7192)) */ 397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_REG_FULLSALE 7 /* Full-Scale Register 407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * (RW, 16-bit (AD7792)/24-bit (AD7192)) */ 417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Communications Register Bit Designations (AD7192_REG_COMM) */ 437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_COMM_WEN (1 << 7) /* Write Enable */ 447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_COMM_WRITE (0 << 6) /* Write Operation */ 457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_COMM_READ (1 << 6) /* Read Operation */ 467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_COMM_ADDR(x) (((x) & 0x7) << 3) /* Register Address */ 477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_COMM_CREAD (1 << 2) /* Continuous Read of Data Register */ 487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Status Register Bit Designations (AD7192_REG_STAT) */ 507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_RDY (1 << 7) /* Ready */ 517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_ERR (1 << 6) /* Error (Overrange, Underrange) */ 527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_NOREF (1 << 5) /* Error no external reference */ 537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_PARITY (1 << 4) /* Parity */ 547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_CH3 (1 << 2) /* Channel 3 */ 557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_CH2 (1 << 1) /* Channel 2 */ 567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_STAT_CH1 (1 << 0) /* Channel 1 */ 577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Mode Register Bit Designations (AD7192_REG_MODE) */ 597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_SEL(x) (((x) & 0x7) << 21) /* Operation Mode Select */ 607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_DAT_STA (1 << 20) /* Status Register transmission */ 617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CLKSRC(x) (((x) & 0x3) << 18) /* Clock Source Select */ 627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_SINC3 (1 << 15) /* SINC3 Filter Select */ 637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_ACX (1 << 14) /* AC excitation enable(AD7195 only)*/ 647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_ENPAR (1 << 13) /* Parity Enable */ 657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CLKDIV (1 << 12) /* Clock divide by 2 (AD7190/2 only)*/ 667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_SCYCLE (1 << 11) /* Single cycle conversion */ 677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_REJ60 (1 << 10) /* 50/60Hz notch filter */ 687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_RATE(x) ((x) & 0x3FF) /* Filter Update Rate Select */ 697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Mode Register: AD7192_MODE_SEL options */ 717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CONT 0 /* Continuous Conversion Mode */ 727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_SINGLE 1 /* Single Conversion Mode */ 737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_IDLE 2 /* Idle Mode */ 747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_PWRDN 3 /* Power-Down Mode */ 757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CAL_INT_ZERO 4 /* Internal Zero-Scale Calibration */ 767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CAL_INT_FULL 5 /* Internal Full-Scale Calibration */ 777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CAL_SYS_ZERO 6 /* System Zero-Scale Calibration */ 787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_MODE_CAL_SYS_FULL 7 /* System Full-Scale Calibration */ 797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Mode Register: AD7192_MODE_CLKSRC options */ 817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CLK_EXT_MCLK1_2 0 /* External 4.92 MHz Clock connected 827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * from MCLK1 to MCLK2 */ 837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CLK_EXT_MCLK2 1 /* External Clock applied to MCLK2 */ 847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CLK_INT 2 /* Internal 4.92 MHz Clock not 857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * available at the MCLK2 pin */ 867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CLK_INT_CO 3 /* Internal 4.92 MHz Clock available 877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * at the MCLK2 pin */ 887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* Configuration Register Bit Designations (AD7192_REG_CONF) */ 917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_CHOP (1 << 23) /* CHOP enable */ 937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_REFSEL (1 << 20) /* REFIN1/REFIN2 Reference Select */ 947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_CHAN(x) (((x) & 0xFF) << 8) /* Channel select */ 957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_BURN (1 << 7) /* Burnout current enable */ 967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_REFDET (1 << 6) /* Reference detect enable */ 977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_BUF (1 << 4) /* Buffered Mode Enable */ 987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_UNIPOLAR (1 << 3) /* Unipolar/Bipolar Enable */ 997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CONF_GAIN(x) ((x) & 0x7) /* Gain Select */ 1007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN1P_AIN2M 0 /* AIN1(+) - AIN2(-) */ 1027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN3P_AIN4M 1 /* AIN3(+) - AIN4(-) */ 1037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_TEMP 2 /* Temp Sensor */ 1047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN2P_AIN2M 3 /* AIN2(+) - AIN2(-) */ 1057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN1 4 /* AIN1 - AINCOM */ 1067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN2 5 /* AIN2 - AINCOM */ 1077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN3 6 /* AIN3 - AINCOM */ 1087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CH_AIN4 7 /* AIN4 - AINCOM */ 1097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* ID Register Bit Designations (AD7192_REG_ID) */ 1117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define ID_AD7190 0x4 1127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define ID_AD7192 0x0 1137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define ID_AD7195 0x6 1147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_ID_MASK 0x0F 1157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* GPOCON Register Bit Designations (AD7192_REG_GPOCON) */ 1177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_BPDSW (1 << 6) /* Bridge power-down switch enable */ 1187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_GP32EN (1 << 5) /* Digital Output P3 and P2 enable */ 1197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_GP10EN (1 << 4) /* Digital Output P1 and P0 enable */ 1207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_P3DAT (1 << 3) /* P3 state */ 1217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_P2DAT (1 << 2) /* P2 state */ 1227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_P1DAT (1 << 1) /* P1 state */ 1237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_GPOCON_P0DAT (1 << 0) /* P0 state */ 1247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_INT_FREQ_MHz 4915200 1267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/* NOTE: 1287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * The AD7190/2/5 features a dual use data out ready DOUT/RDY output. 1297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * In order to avoid contentions on the SPI bus, it's therefore necessary 1307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * to use spi bus locking. 1317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * 1327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * The DOUT/RDY output must also be wired to an interrupt capable GPIO. 1337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich */ 1347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstruct ad7192_state { 1367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct spi_device *spi; 1377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_trigger *trig; 1387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct regulator *reg; 1397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_platform_data *pdata; 1407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich wait_queue_head_t wq_data_avail; 1417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich bool done; 1427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich bool irq_dis; 1437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u16 int_vref_mv; 1447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u32 mclk; 1457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u32 f_order; 1467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u32 mode; 1477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u32 conf; 1487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u32 scale_avail[8][2]; 1497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u8 gpocon; 1507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u8 devid; 1517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich /* 1527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * DMA (thus cache coherency maintenance) requires the 1537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * transfer buffers to live in their own cache lines. 1547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich */ 1557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u8 data[4] ____cacheline_aligned; 1567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 1577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int __ad7192_write_reg(struct ad7192_state *st, bool locked, 1597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich bool cs_change, unsigned char reg, 1607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned size, unsigned val) 1617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 1627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u8 *data = st->data; 1637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct spi_transfer t = { 1647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .tx_buf = data, 1657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .len = size + 1, 1667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .cs_change = cs_change, 1677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich }; 1687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct spi_message m; 1697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[0] = AD7192_COMM_WRITE | AD7192_COMM_ADDR(reg); 1717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich switch (size) { 1737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case 3: 1747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[1] = val >> 16; 1757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[2] = val >> 8; 1767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[3] = val; 1777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 1787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case 2: 1797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[1] = val >> 8; 1807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[2] = val; 1817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 1827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case 1: 1837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[1] = val; 1847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 1857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich default: 1867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EINVAL; 1877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 1887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_message_init(&m); 1907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_message_add_tail(&t, &m); 1917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (locked) 1937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return spi_sync_locked(st->spi, &m); 1947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 1957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return spi_sync(st->spi, &m); 1967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 1977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_write_reg(struct ad7192_state *st, 1997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned reg, unsigned size, unsigned val) 2007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 2017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return __ad7192_write_reg(st, false, false, reg, size, val); 2027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 2037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int __ad7192_read_reg(struct ad7192_state *st, bool locked, 2057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich bool cs_change, unsigned char reg, 2067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int *val, unsigned size) 2077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 2087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u8 *data = st->data; 2097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret; 2107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct spi_transfer t[] = { 2117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich { 2127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .tx_buf = data, 2137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .len = 1, 2147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich }, { 2157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .rx_buf = data, 2167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .len = size, 2177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .cs_change = cs_change, 2187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich }, 2197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich }; 2207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct spi_message m; 2217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich data[0] = AD7192_COMM_READ | AD7192_COMM_ADDR(reg); 2237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_message_init(&m); 2257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_message_add_tail(&t[0], &m); 2267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_message_add_tail(&t[1], &m); 2277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (locked) 2297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = spi_sync_locked(st->spi, &m); 2307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 2317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = spi_sync(st->spi, &m); 2327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret < 0) 2347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 2357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich switch (size) { 2377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case 3: 2387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val = data[0] << 16 | data[1] << 8 | data[2]; 2397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 2407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case 2: 2417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val = data[0] << 8 | data[1]; 2427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 2437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case 1: 2447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val = data[0]; 2457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 2467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich default: 2477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EINVAL; 2487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 2497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 2517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 2527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_read_reg(struct ad7192_state *st, 2547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned reg, int *val, unsigned size) 2557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 2567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return __ad7192_read_reg(st, 0, 0, reg, val, size); 2577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 2587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_read(struct ad7192_state *st, unsigned ch, 2607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned len, int *val) 2617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 2627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret; 2637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf = (st->conf & ~AD7192_CONF_CHAN(-1)) | 2647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CONF_CHAN(1 << ch); 2657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode = (st->mode & ~AD7192_MODE_SEL(-1)) | 2667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_MODE_SEL(AD7192_MODE_SINGLE); 2677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_CONF, 3, st->conf); 2697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_bus_lock(st->spi->master); 2717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->done = false; 2727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = __ad7192_write_reg(st, 1, 1, AD7192_REG_MODE, 3, st->mode); 2747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret < 0) 2757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 2767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->irq_dis = false; 2787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich enable_irq(st->spi->irq); 2797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich wait_event_interruptible(st->wq_data_avail, st->done); 2807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = __ad7192_read_reg(st, 1, 0, AD7192_REG_DATA, val, len); 2827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichout: 2837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_bus_unlock(st->spi->master); 2847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 2867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 2877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_calibrate(struct ad7192_state *st, unsigned mode, unsigned ch) 2897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 2907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret; 2917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf = (st->conf & ~AD7192_CONF_CHAN(-1)) | 2937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CONF_CHAN(1 << ch); 2947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode = (st->mode & ~AD7192_MODE_SEL(-1)) | AD7192_MODE_SEL(mode); 2957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_CONF, 3, st->conf); 2977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 2987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_bus_lock(st->spi->master); 2997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->done = false; 3007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = __ad7192_write_reg(st, 1, 1, AD7192_REG_MODE, 3, 3027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich (st->devid != ID_AD7195) ? 3037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode | AD7192_MODE_CLKDIV : 3047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode); 3057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret < 0) 3067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 3077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->irq_dis = false; 3097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich enable_irq(st->spi->irq); 3107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich wait_event_interruptible(st->wq_data_avail, st->done); 3117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode = (st->mode & ~AD7192_MODE_SEL(-1)) | 3137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_MODE_SEL(AD7192_MODE_IDLE); 3147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = __ad7192_write_reg(st, 1, 0, AD7192_REG_MODE, 3, st->mode); 3167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichout: 3177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_bus_unlock(st->spi->master); 3187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 3207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 3217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic const u8 ad7192_calib_arr[8][2] = { 3237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_ZERO, AD7192_CH_AIN1}, 3247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_FULL, AD7192_CH_AIN1}, 3257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_ZERO, AD7192_CH_AIN2}, 3267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_FULL, AD7192_CH_AIN2}, 3277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_ZERO, AD7192_CH_AIN3}, 3287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_FULL, AD7192_CH_AIN3}, 3297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_ZERO, AD7192_CH_AIN4}, 3307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {AD7192_MODE_CAL_INT_FULL, AD7192_CH_AIN4} 3317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 3327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_calibrate_all(struct ad7192_state *st) 3347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 3357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int i, ret; 3367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich for (i = 0; i < ARRAY_SIZE(ad7192_calib_arr); i++) { 3387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_calibrate(st, ad7192_calib_arr[i][0], 3397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_calib_arr[i][1]); 3407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 3417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 3427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 3437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 3457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichout: 3467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dev_err(&st->spi->dev, "Calibration failed\n"); 3477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 3487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 3497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_setup(struct ad7192_state *st) 3517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 3527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_dev *indio_dev = spi_get_drvdata(st->spi); 3537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_platform_data *pdata = st->pdata; 3547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned long long scale_uv; 3557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int i, ret, id; 3567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich u8 ones[6]; 3577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich /* reset the serial interface */ 3597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich memset(&ones, 0xFF, 6); 3607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = spi_write(st->spi, &ones, 6); 3617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret < 0) 3627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 3637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich msleep(1); /* Wait for at least 500us */ 3647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich /* write/read test for device presence */ 3667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_read_reg(st, AD7192_REG_ID, &id, 1); 3677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 3687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 3697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich id &= AD7192_ID_MASK; 3717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (id != st->devid) 3737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dev_warn(&st->spi->dev, "device ID query failed (0x%X)\n", id); 3747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich switch (pdata->clock_source_sel) { 3767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case AD7192_CLK_EXT_MCLK1_2: 3777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case AD7192_CLK_EXT_MCLK2: 3787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mclk = AD7192_INT_FREQ_MHz; 3797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 3807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case AD7192_CLK_INT: 3817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case AD7192_CLK_INT_CO: 3827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->ext_clk_Hz) 3837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mclk = pdata->ext_clk_Hz; 3847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 3857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mclk = AD7192_INT_FREQ_MHz; 3867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 3877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich default: 3887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = -EINVAL; 3897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 3907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 3917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode = AD7192_MODE_SEL(AD7192_MODE_IDLE) | 3937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_MODE_CLKSRC(pdata->clock_source_sel) | 3947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_MODE_RATE(480); 3957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf = AD7192_CONF_GAIN(0); 3977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->rej60_en) 3997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode |= AD7192_MODE_REJ60; 4007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->sinc3_en) 4027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode |= AD7192_MODE_SINC3; 4037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->refin2_en && (st->devid != ID_AD7195)) 4057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf |= AD7192_CONF_REFSEL; 4067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->chop_en) { 4087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf |= AD7192_CONF_CHOP; 4097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->sinc3_en) 4107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->f_order = 3; /* SINC 3rd order */ 4117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 4127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->f_order = 4; /* SINC 4th order */ 4137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } else { 4147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->f_order = 1; 4157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 4167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->buf_en) 4187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf |= AD7192_CONF_BUF; 4197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->unipolar_en) 4217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf |= AD7192_CONF_UNIPOLAR; 4227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata->burnout_curr_en) 4247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf |= AD7192_CONF_BURN; 4257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_write_reg(st, AD7192_REG_MODE, 3, st->mode); 4277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 4287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 4297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_write_reg(st, AD7192_REG_CONF, 3, st->conf); 4317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 4327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 4337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_calibrate_all(st); 4357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 4367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 4377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich /* Populate available ADC input ranges */ 4397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) { 4407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich scale_uv = ((u64)st->int_vref_mv * 100000000) 4417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich >> (indio_dev->channels[0].scan_type.realbits - 4427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ((st->conf & AD7192_CONF_UNIPOLAR) ? 0 : 1)); 4437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich scale_uv >>= i; 4447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->scale_avail[i][1] = do_div(scale_uv, 100000000) * 10; 4467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->scale_avail[i][0] = scale_uv; 4477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 4487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 4507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichout: 4517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dev_err(&st->spi->dev, "setup failed\n"); 4527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 4537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 4547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_ring_preenable(struct iio_dev *indio_dev) 4567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 4577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 4587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned channel; 4592150489ffbd1cd6f5d1091c1738b1adfbdf34a43Jonathan Cameron int ret; 4607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 461550268ca1111a5b4737f15f7bf646cede9d1f0cdJonathan Cameron if (bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)) 4627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EINVAL; 4637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4642150489ffbd1cd6f5d1091c1738b1adfbdf34a43Jonathan Cameron ret = iio_sw_buffer_preenable(indio_dev); 4652150489ffbd1cd6f5d1091c1738b1adfbdf34a43Jonathan Cameron if (ret < 0) 4662150489ffbd1cd6f5d1091c1738b1adfbdf34a43Jonathan Cameron return ret; 4672150489ffbd1cd6f5d1091c1738b1adfbdf34a43Jonathan Cameron 468550268ca1111a5b4737f15f7bf646cede9d1f0cdJonathan Cameron channel = find_first_bit(indio_dev->active_scan_mask, 469550268ca1111a5b4737f15f7bf646cede9d1f0cdJonathan Cameron indio_dev->masklength); 4707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode = (st->mode & ~AD7192_MODE_SEL(-1)) | 4727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_MODE_SEL(AD7192_MODE_CONT); 4737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf = (st->conf & ~AD7192_CONF_CHAN(-1)) | 4747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CONF_CHAN(1 << indio_dev->channels[channel].address); 4757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_CONF, 3, st->conf); 4777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_bus_lock(st->spi->master); 4797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich __ad7192_write_reg(st, 1, 1, AD7192_REG_MODE, 3, st->mode); 4807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->irq_dis = false; 4827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich enable_irq(st->spi->irq); 4837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 4857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 4867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_ring_postdisable(struct iio_dev *indio_dev) 4887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 4897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 4907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode = (st->mode & ~AD7192_MODE_SEL(-1)) | 4927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_MODE_SEL(AD7192_MODE_IDLE); 4937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->done = false; 4957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich wait_event_interruptible(st->wq_data_avail, st->done); 4967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 4977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!st->irq_dis) 4987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich disable_irq_nosync(st->spi->irq); 4997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich __ad7192_write_reg(st, 1, 0, AD7192_REG_MODE, 3, st->mode); 5017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return spi_bus_unlock(st->spi->master); 5037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 5047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/** 5067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * ad7192_trigger_handler() bh of trigger launched polling to ring buffer 5077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich **/ 5087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic irqreturn_t ad7192_trigger_handler(int irq, void *p) 5097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 5107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_poll_func *pf = p; 511e65bc6ac6fa54959ac0b3712b0f35bbf073c073eJonathan Cameron struct iio_dev *indio_dev = pf->indio_dev; 51214555b14455f9acbdf0e500ae96140828a970796Jonathan Cameron struct iio_buffer *ring = indio_dev->buffer; 5137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 5147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich s64 dat64[2]; 5157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich s32 *dat32 = (s32 *)dat64; 5167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 517550268ca1111a5b4737f15f7bf646cede9d1f0cdJonathan Cameron if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength)) 5187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich __ad7192_read_reg(st, 1, 1, AD7192_REG_DATA, 5197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dat32, 5207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->channels[0].scan_type.realbits/8); 5217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich /* Guaranteed to be aligned with 8 byte boundary */ 523fd6487f8439f7859acf17589f1d612285b5c0fa5Jonathan Cameron if (indio_dev->scan_timestamp) 5247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dat64[1] = pf->timestamp; 5257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ring->access->store_to(ring, (u8 *)dat64, pf->timestamp); 5277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich iio_trigger_notify_done(indio_dev->trig); 5297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->irq_dis = false; 5307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich enable_irq(st->spi->irq); 5317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return IRQ_HANDLED; 5337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 5347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 53514555b14455f9acbdf0e500ae96140828a970796Jonathan Cameronstatic const struct iio_buffer_setup_ops ad7192_ring_setup_ops = { 5367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .preenable = &ad7192_ring_preenable, 5373b99fb7656a73d483b00fd4777646c00db16b040Jonathan Cameron .postenable = &iio_triggered_buffer_postenable, 5383b99fb7656a73d483b00fd4777646c00db16b040Jonathan Cameron .predisable = &iio_triggered_buffer_predisable, 5397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .postdisable = &ad7192_ring_postdisable, 540f6aea5543021c341f0397b191243fecca98ac595Lars-Peter Clausen .validate_scan_mask = &iio_validate_scan_mask_onehot, 5417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 5427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_register_ring_funcs_and_init(struct iio_dev *indio_dev) 5447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 545a648232dc5ed840c6dab0a949450ee4cdf5830bdLars-Peter Clausen return iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, 546a648232dc5ed840c6dab0a949450ee4cdf5830bdLars-Peter Clausen &ad7192_trigger_handler, &ad7192_ring_setup_ops); 5477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 5487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic void ad7192_ring_cleanup(struct iio_dev *indio_dev) 5507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 551a648232dc5ed840c6dab0a949450ee4cdf5830bdLars-Peter Clausen iio_triggered_buffer_cleanup(indio_dev); 5527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 5537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich/** 5557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich * ad7192_data_rdy_trig_poll() the event handler for the data rdy trig 5567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich **/ 5577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic irqreturn_t ad7192_data_rdy_trig_poll(int irq, void *private) 5587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 5597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(private); 5607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->done = true; 5627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich wake_up_interruptible(&st->wq_data_avail); 5637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich disable_irq_nosync(irq); 5647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->irq_dis = true; 5657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich iio_trigger_poll(st->trig, iio_get_time_ns()); 5667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return IRQ_HANDLED; 5687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 5697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5708324e860770b1defa73d8f52244211bb9f0ed2f8Jonathan Cameronstatic struct iio_trigger_ops ad7192_trigger_ops = { 5718324e860770b1defa73d8f52244211bb9f0ed2f8Jonathan Cameron .owner = THIS_MODULE, 5728324e860770b1defa73d8f52244211bb9f0ed2f8Jonathan Cameron}; 5738324e860770b1defa73d8f52244211bb9f0ed2f8Jonathan Cameron 5747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_probe_trigger(struct iio_dev *indio_dev) 5757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 5767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 5777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret; 5787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5797cbb753701d11f3c71e8543e1ae0fc0772edac06Lars-Peter Clausen st->trig = iio_trigger_alloc("%s-dev%d", 5807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_get_device_id(st->spi)->name, 5817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->id); 5827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (st->trig == NULL) { 5837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = -ENOMEM; 5847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto error_ret; 5857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 5868324e860770b1defa73d8f52244211bb9f0ed2f8Jonathan Cameron st->trig->ops = &ad7192_trigger_ops; 5877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = request_irq(st->spi->irq, 5887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_data_rdy_trig_poll, 5897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich IRQF_TRIGGER_LOW, 5907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_get_device_id(st->spi)->name, 5917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev); 5927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 5937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto error_free_trig; 5947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 5957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich disable_irq_nosync(st->spi->irq); 5967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->irq_dis = true; 5977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->trig->dev.parent = &st->spi->dev; 5987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->trig->private_data = indio_dev; 5997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = iio_trigger_register(st->trig); 6017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich /* select default trigger */ 6037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->trig = st->trig; 6047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 6057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto error_free_irq; 6067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 6087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennericherror_free_irq: 6107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich free_irq(st->spi->irq, indio_dev); 6117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennericherror_free_trig: 6127cbb753701d11f3c71e8543e1ae0fc0772edac06Lars-Peter Clausen iio_trigger_free(st->trig); 6137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennericherror_ret: 6147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 6157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 6167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic void ad7192_remove_trigger(struct iio_dev *indio_dev) 6187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 6197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 6207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich iio_trigger_unregister(st->trig); 6227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich free_irq(st->spi->irq, indio_dev); 6237cbb753701d11f3c71e8543e1ae0fc0772edac06Lars-Peter Clausen iio_trigger_free(st->trig); 6247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 6257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic ssize_t ad7192_read_frequency(struct device *dev, 6277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct device_attribute *attr, 6287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich char *buf) 6297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 63062c5183971428a559b687fcb15f548df28dbe8dcLars-Peter Clausen struct iio_dev *indio_dev = dev_to_iio_dev(dev); 6317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 6327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return sprintf(buf, "%d\n", st->mclk / 6347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich (st->f_order * 1024 * AD7192_MODE_RATE(st->mode))); 6357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 6367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic ssize_t ad7192_write_frequency(struct device *dev, 6387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct device_attribute *attr, 6397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich const char *buf, 6407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich size_t len) 6417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 64262c5183971428a559b687fcb15f548df28dbe8dcLars-Peter Clausen struct iio_dev *indio_dev = dev_to_iio_dev(dev); 6437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 6447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned long lval; 6457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int div, ret; 6467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = strict_strtoul(buf, 10, &lval); 6487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 6497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 6507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_lock(&indio_dev->mlock); 65214555b14455f9acbdf0e500ae96140828a970796Jonathan Cameron if (iio_buffer_enabled(indio_dev)) { 6537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 6547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EBUSY; 6557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 6567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich div = st->mclk / (lval * st->f_order * 1024); 6587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (div < 1 || div > 1023) { 6597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = -EINVAL; 6607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto out; 6617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 6627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode &= ~AD7192_MODE_RATE(-1); 6647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode |= AD7192_MODE_RATE(div); 6657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_MODE, 3, st->mode); 6667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichout: 6687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 6697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret ? ret : len; 6717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 6727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO, 6747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_read_frequency, 6757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_frequency); 6767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic ssize_t ad7192_show_scale_available(struct device *dev, 6797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct device_attribute *attr, char *buf) 6807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 68162c5183971428a559b687fcb15f548df28dbe8dcLars-Peter Clausen struct iio_dev *indio_dev = dev_to_iio_dev(dev); 6827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 6837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int i, len = 0; 6847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) 6867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich len += sprintf(buf + len, "%d.%09u ", st->scale_avail[i][0], 6877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->scale_avail[i][1]); 6887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich len += sprintf(buf + len, "\n"); 6907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 6917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return len; 6927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 6937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 694322c95636739420631e51f3d3f24132dc220762aJonathan Cameronstatic IIO_DEVICE_ATTR_NAMED(in_v_m_v_scale_available, 695322c95636739420631e51f3d3f24132dc220762aJonathan Cameron in_voltage-voltage_scale_available, 6967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich S_IRUGO, ad7192_show_scale_available, NULL, 0); 6977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 698322c95636739420631e51f3d3f24132dc220762aJonathan Cameronstatic IIO_DEVICE_ATTR(in_voltage_scale_available, S_IRUGO, 6997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_show_scale_available, NULL, 0); 7007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic ssize_t ad7192_show_ac_excitation(struct device *dev, 7027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct device_attribute *attr, 7037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich char *buf) 7047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 70562c5183971428a559b687fcb15f548df28dbe8dcLars-Peter Clausen struct iio_dev *indio_dev = dev_to_iio_dev(dev); 7067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 7077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return sprintf(buf, "%d\n", !!(st->mode & AD7192_MODE_ACX)); 7097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 7107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic ssize_t ad7192_show_bridge_switch(struct device *dev, 7127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct device_attribute *attr, 7137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich char *buf) 7147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 71562c5183971428a559b687fcb15f548df28dbe8dcLars-Peter Clausen struct iio_dev *indio_dev = dev_to_iio_dev(dev); 7167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 7177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return sprintf(buf, "%d\n", !!(st->gpocon & AD7192_GPOCON_BPDSW)); 7197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 7207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic ssize_t ad7192_set(struct device *dev, 7227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct device_attribute *attr, 7237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich const char *buf, 7247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich size_t len) 7257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 72662c5183971428a559b687fcb15f548df28dbe8dcLars-Peter Clausen struct iio_dev *indio_dev = dev_to_iio_dev(dev); 7277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 7287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_dev_attr *this_attr = to_iio_dev_attr(attr); 7297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret; 7307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich bool val; 7317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = strtobool(buf, &val); 7337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret < 0) 7347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 7357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_lock(&indio_dev->mlock); 73714555b14455f9acbdf0e500ae96140828a970796Jonathan Cameron if (iio_buffer_enabled(indio_dev)) { 7387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 7397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EBUSY; 7407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 7417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 742e15fbc91a4304a977ed99c3eb21bab7015e86c11Michael Hennerich switch ((u32) this_attr->address) { 7437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case AD7192_REG_GPOCON: 7447a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (val) 7457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->gpocon |= AD7192_GPOCON_BPDSW; 7467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 7477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->gpocon &= ~AD7192_GPOCON_BPDSW; 7487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_GPOCON, 1, st->gpocon); 7507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 7517a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case AD7192_REG_MODE: 7527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (val) 7537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode |= AD7192_MODE_ACX; 7547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 7557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->mode &= ~AD7192_MODE_ACX; 7567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_GPOCON, 3, st->mode); 7587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 7597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich default: 7607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = -EINVAL; 7617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 7627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 7647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret ? ret : len; 7667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 7677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic IIO_DEVICE_ATTR(bridge_switch_en, S_IRUGO | S_IWUSR, 7697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_show_bridge_switch, ad7192_set, 7707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_REG_GPOCON); 7717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic IIO_DEVICE_ATTR(ac_excitation_en, S_IRUGO | S_IWUSR, 7737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_show_ac_excitation, ad7192_set, 7747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_REG_MODE); 7757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic struct attribute *ad7192_attributes[] = { 7777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich &iio_dev_attr_sampling_frequency.dev_attr.attr, 778322c95636739420631e51f3d3f24132dc220762aJonathan Cameron &iio_dev_attr_in_v_m_v_scale_available.dev_attr.attr, 779322c95636739420631e51f3d3f24132dc220762aJonathan Cameron &iio_dev_attr_in_voltage_scale_available.dev_attr.attr, 7807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich &iio_dev_attr_bridge_switch_en.dev_attr.attr, 7817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich &iio_dev_attr_ac_excitation_en.dev_attr.attr, 7827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich NULL 7837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 7847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 7857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic const struct attribute_group ad7192_attribute_group = { 7867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .attrs = ad7192_attributes, 78715bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron}; 78815bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron 78915bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameronstatic struct attribute *ad7195_attributes[] = { 79015bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron &iio_dev_attr_sampling_frequency.dev_attr.attr, 79115bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron &iio_dev_attr_in_v_m_v_scale_available.dev_attr.attr, 79215bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron &iio_dev_attr_in_voltage_scale_available.dev_attr.attr, 79315bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron &iio_dev_attr_bridge_switch_en.dev_attr.attr, 79415bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron NULL 79515bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron}; 79615bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron 79715bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameronstatic const struct attribute_group ad7195_attribute_group = { 79815bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .attrs = ad7195_attributes, 7997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 8007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_read_raw(struct iio_dev *indio_dev, 8027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_chan_spec const *chan, 8037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int *val, 8047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int *val2, 8057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich long m) 8067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 8077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 8087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret, smpl = 0; 8097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich bool unipolar = !!(st->conf & AD7192_CONF_UNIPOLAR); 8107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich switch (m) { 812b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron case IIO_CHAN_INFO_RAW: 8137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_lock(&indio_dev->mlock); 81414555b14455f9acbdf0e500ae96140828a970796Jonathan Cameron if (iio_buffer_enabled(indio_dev)) 815e0f0ddad805e98ae725d52a6cc23ac114ecf6114Jonathan Cameron ret = -EBUSY; 8167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 8177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_read(st, chan->address, 8187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich chan->scan_type.realbits / 8, &smpl); 8197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 8207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret < 0) 8227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 8237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val = (smpl >> chan->scan_type.shift) & 8257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ((1 << (chan->scan_type.realbits)) - 1); 8267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich switch (chan->type) { 828ade7ef7ba3bf888b90269f8ca864841b2cd9803fJonathan Cameron case IIO_VOLTAGE: 8297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!unipolar) 8307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val -= (1 << (chan->scan_type.realbits - 1)); 8317a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 8327a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich case IIO_TEMP: 8337a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val -= 0x800000; 8347a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val /= 2815; /* temp Kelvin */ 8357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich *val -= 273; /* temp Celsius */ 8367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich break; 8377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich default: 8387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EINVAL; 8397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 8407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return IIO_VAL_INT; 8417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 842c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron case IIO_CHAN_INFO_SCALE: 843c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron switch (chan->type) { 844c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron case IIO_VOLTAGE: 845c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron mutex_lock(&indio_dev->mlock); 846c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron *val = st->scale_avail[AD7192_CONF_GAIN(st->conf)][0]; 847c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron *val2 = st->scale_avail[AD7192_CONF_GAIN(st->conf)][1]; 848c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron mutex_unlock(&indio_dev->mlock); 849c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron return IIO_VAL_INT_PLUS_NANO; 850c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron case IIO_TEMP: 851c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron *val = 1000; 852c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron return IIO_VAL_INT; 853c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron default: 854c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron return -EINVAL; 855c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron } 8567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 8577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EINVAL; 8597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 8607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_write_raw(struct iio_dev *indio_dev, 8627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_chan_spec const *chan, 8637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int val, 8647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int val2, 8657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich long mask) 8667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 8677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 8687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich int ret, i; 8697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich unsigned int tmp; 8707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_lock(&indio_dev->mlock); 87214555b14455f9acbdf0e500ae96140828a970796Jonathan Cameron if (iio_buffer_enabled(indio_dev)) { 8737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 8747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EBUSY; 8757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 8767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich switch (mask) { 878c8a9f8056f40f6201b84fdddb49a1c62630902c5Jonathan Cameron case IIO_CHAN_INFO_SCALE: 8797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = -EINVAL; 8807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) 8817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (val2 == st->scale_avail[i][1]) { 8827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich tmp = st->conf; 8837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf &= ~AD7192_CONF_GAIN(-1); 8847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->conf |= AD7192_CONF_GAIN(i); 8857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (tmp != st->conf) { 8877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_write_reg(st, AD7192_REG_CONF, 8887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 3, st->conf); 8897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_calibrate_all(st); 8907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 8917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = 0; 8927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 8937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich default: 8957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = -EINVAL; 8967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 8977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 8987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich mutex_unlock(&indio_dev->mlock); 8997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 9017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 9027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_validate_trigger(struct iio_dev *indio_dev, 9047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_trigger *trig) 9057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 9067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (indio_dev->trig != trig) 9077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -EINVAL; 9087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 9107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 9117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_write_raw_get_fmt(struct iio_dev *indio_dev, 9137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_chan_spec const *chan, 9147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich long mask) 9157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 9167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return IIO_VAL_INT_PLUS_NANO; 9177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 9187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic const struct iio_info ad7192_info = { 9207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .read_raw = &ad7192_read_raw, 9217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .write_raw = &ad7192_write_raw, 9227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .write_raw_get_fmt = &ad7192_write_raw_get_fmt, 9237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .attrs = &ad7192_attribute_group, 9247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .validate_trigger = ad7192_validate_trigger, 9257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .driver_module = THIS_MODULE, 9267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 9277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 92815bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameronstatic const struct iio_info ad7195_info = { 92915bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .read_raw = &ad7192_read_raw, 93015bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .write_raw = &ad7192_write_raw, 93115bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .write_raw_get_fmt = &ad7192_write_raw_get_fmt, 93215bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .attrs = &ad7195_attribute_group, 93315bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .validate_trigger = ad7192_validate_trigger, 93415bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron .driver_module = THIS_MODULE, 93515bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron}; 93615bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron 9377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CHAN_DIFF(_chan, _chan2, _name, _address, _si) \ 938ade7ef7ba3bf888b90269f8ca864841b2cd9803fJonathan Cameron { .type = IIO_VOLTAGE, \ 939ade7ef7ba3bf888b90269f8ca864841b2cd9803fJonathan Cameron .differential = 1, \ 9407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .indexed = 1, \ 9417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .extend_name = _name, \ 9427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .channel = _chan, \ 9437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .channel2 = _chan2, \ 944b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ 945b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron IIO_CHAN_INFO_SCALE_SHARED_BIT, \ 9467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .address = _address, \ 9477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .scan_index = _si, \ 9487a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .scan_type = IIO_ST('s', 24, 32, 0)} 9497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9507a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CHAN(_chan, _address, _si) \ 951ade7ef7ba3bf888b90269f8ca864841b2cd9803fJonathan Cameron { .type = IIO_VOLTAGE, \ 9527a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .indexed = 1, \ 9537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .channel = _chan, \ 954b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ 955b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron IIO_CHAN_INFO_SCALE_SHARED_BIT, \ 9567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .address = _address, \ 9577a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .scan_index = _si, \ 9587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .scan_type = IIO_ST('s', 24, 32, 0)} 9597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich#define AD7192_CHAN_TEMP(_chan, _address, _si) \ 9617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich { .type = IIO_TEMP, \ 9627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .indexed = 1, \ 9637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .channel = _chan, \ 964b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \ 965b11f98ff8c35d62523b2bfad07df3d756113aae3Jonathan Cameron IIO_CHAN_INFO_SCALE_SEPARATE_BIT, \ 9667a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .address = _address, \ 9677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .scan_index = _si, \ 9687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .scan_type = IIO_ST('s', 24, 32, 0)} 9697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic struct iio_chan_spec ad7192_channels[] = { 9717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN_DIFF(1, 2, NULL, AD7192_CH_AIN1P_AIN2M, 0), 9727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN_DIFF(3, 4, NULL, AD7192_CH_AIN3P_AIN4M, 1), 9737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN_TEMP(0, AD7192_CH_TEMP, 2), 9747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN_DIFF(2, 2, "shorted", AD7192_CH_AIN2P_AIN2M, 3), 9757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN(1, AD7192_CH_AIN1, 4), 9767a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN(2, AD7192_CH_AIN2, 5), 9777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN(3, AD7192_CH_AIN3, 6), 9787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich AD7192_CHAN(4, AD7192_CH_AIN4, 7), 9797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich IIO_CHAN_SOFT_TIMESTAMP(8), 9807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 9817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int __devinit ad7192_probe(struct spi_device *spi) 9837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 9847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_platform_data *pdata = spi->dev.platform_data; 9857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st; 9867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_dev *indio_dev; 987f6aea5543021c341f0397b191243fecca98ac595Lars-Peter Clausen int ret , voltage_uv = 0; 9887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!pdata) { 9907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dev_err(&spi->dev, "no platform data?\n"); 9917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -ENODEV; 9927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 9937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9947a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!spi->irq) { 9957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dev_err(&spi->dev, "no IRQ?\n"); 9967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -ENODEV; 9977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 9987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 9997cbb753701d11f3c71e8543e1ae0fc0772edac06Lars-Peter Clausen indio_dev = iio_device_alloc(sizeof(*st)); 10007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (indio_dev == NULL) 10017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return -ENOMEM; 10027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st = iio_priv(indio_dev); 10047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10057a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->reg = regulator_get(&spi->dev, "vcc"); 10067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!IS_ERR(st->reg)) { 10077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = regulator_enable(st->reg); 10087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 10097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto error_put_reg; 10107a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10117a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich voltage_uv = regulator_get_voltage(st->reg); 10127a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 10137a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10147a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->pdata = pdata; 10157a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10167a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (pdata && pdata->vref_mv) 10177a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->int_vref_mv = pdata->vref_mv; 10187a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else if (voltage_uv) 10197a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->int_vref_mv = voltage_uv / 1000; 10207a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich else 10217a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich dev_warn(&spi->dev, "reference voltage undefined\n"); 10227a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10237a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich spi_set_drvdata(spi, indio_dev); 10247a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->spi = spi; 10257a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich st->devid = spi_get_device_id(spi)->driver_data; 10267a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->dev.parent = &spi->dev; 10277a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->name = spi_get_device_id(spi)->name; 10287a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->modes = INDIO_DIRECT_MODE; 10297a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->channels = ad7192_channels; 10307a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich indio_dev->num_channels = ARRAY_SIZE(ad7192_channels); 103115bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron if (st->devid == ID_AD7195) 103215bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron indio_dev->info = &ad7195_info; 103315bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron else 103415bbb7793ad7f6f106ce09fdfa3956c5aff37cf1Jonathan Cameron indio_dev->info = &ad7192_info; 10357a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10367a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich init_waitqueue_head(&st->wq_data_avail); 10377a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10387a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_register_ring_funcs_and_init(indio_dev); 10397a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 10407a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich goto error_disable_reg; 10417a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10427a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_probe_trigger(indio_dev); 10437a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 1044d2fffd6c2fd60fe9ab63ef30758d9d43a5057549Jonathan Cameron goto error_ring_cleanup; 10457a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10467a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ret = ad7192_setup(st); 10477a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (ret) 1048a648232dc5ed840c6dab0a949450ee4cdf5830bdLars-Peter Clausen goto error_remove_trigger; 10497a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1050d2fffd6c2fd60fe9ab63ef30758d9d43a5057549Jonathan Cameron ret = iio_device_register(indio_dev); 1051d2fffd6c2fd60fe9ab63ef30758d9d43a5057549Jonathan Cameron if (ret < 0) 1052a648232dc5ed840c6dab0a949450ee4cdf5830bdLars-Peter Clausen goto error_remove_trigger; 10537a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 10547a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10557a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennericherror_remove_trigger: 10567a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_remove_trigger(indio_dev); 1057d2fffd6c2fd60fe9ab63ef30758d9d43a5057549Jonathan Cameronerror_ring_cleanup: 10587a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_ring_cleanup(indio_dev); 10597a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennericherror_disable_reg: 10607a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!IS_ERR(st->reg)) 10617a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich regulator_disable(st->reg); 10627a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennericherror_put_reg: 10637a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!IS_ERR(st->reg)) 10647a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich regulator_put(st->reg); 10657a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10667cbb753701d11f3c71e8543e1ae0fc0772edac06Lars-Peter Clausen iio_device_free(indio_dev); 10677a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10687a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return ret; 10697a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 10707a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10717a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic int ad7192_remove(struct spi_device *spi) 10727a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich{ 10737a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct iio_dev *indio_dev = spi_get_drvdata(spi); 10747a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich struct ad7192_state *st = iio_priv(indio_dev); 10757a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 1076d2fffd6c2fd60fe9ab63ef30758d9d43a5057549Jonathan Cameron iio_device_unregister(indio_dev); 10777a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_remove_trigger(indio_dev); 10787a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich ad7192_ring_cleanup(indio_dev); 10797a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10807a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich if (!IS_ERR(st->reg)) { 10817a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich regulator_disable(st->reg); 10827a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich regulator_put(st->reg); 10837a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich } 10847a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10857a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich return 0; 10867a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich} 10877a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10887a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic const struct spi_device_id ad7192_id[] = { 10897a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {"ad7190", ID_AD7190}, 10907a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {"ad7192", ID_AD7192}, 10917a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {"ad7195", ID_AD7195}, 10927a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich {} 10937a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 109455e4390cb04e8b0fbae8983c3494c9e24132db1bLars-Peter ClausenMODULE_DEVICE_TABLE(spi, ad7192_id); 10957a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 10967a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerichstatic struct spi_driver ad7192_driver = { 10977a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .driver = { 10987a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .name = "ad7192", 10997a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .owner = THIS_MODULE, 11007a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich }, 11017a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .probe = ad7192_probe, 11027a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .remove = __devexit_p(ad7192_remove), 11037a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich .id_table = ad7192_id, 11047a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich}; 1105ae6ae6fec3f7d6919e0146996df37b665c75f662Lars-Peter Clausenmodule_spi_driver(ad7192_driver); 11067a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael Hennerich 11077a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael HennerichMODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); 11087a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael HennerichMODULE_DESCRIPTION("Analog Devices AD7190, AD7192, AD7195 ADC"); 11097a27b042f9cf6bd6e60c236a55d7a71a64287a84Michael HennerichMODULE_LICENSE("GPL v2"); 1110