ad7266.c revision fce8abfda40a764f4662ee354c1646ec78061371
18ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen/* 28ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * AD7266/65 SPI ADC driver 38ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * 48ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * Copyright 2012 Analog Devices Inc. 58ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * 68ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * Licensed under the GPL-2. 78ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen */ 88ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 98ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/device.h> 108ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/kernel.h> 118ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/slab.h> 128ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/spi/spi.h> 138ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/regulator/consumer.h> 148ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/err.h> 158ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/gpio.h> 168ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/module.h> 178ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 188ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/interrupt.h> 198ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 208ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/iio/iio.h> 218ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/iio/buffer.h> 228ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/iio/trigger_consumer.h> 238ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/iio/triggered_buffer.h> 248ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 258ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#include <linux/platform_data/ad7266.h> 268ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 278ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstruct ad7266_state { 288ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct spi_device *spi; 298ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct regulator *reg; 308ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned long vref_uv; 318ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 328ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct spi_transfer single_xfer[3]; 338ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct spi_message single_msg; 348ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 358ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen enum ad7266_range range; 368ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen enum ad7266_mode mode; 378ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen bool fixed_addr; 388ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct gpio gpios[3]; 398ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 408ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* 418ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * DMA (thus cache coherency maintenance) requires the 428ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * transfer buffers to live in their own cache lines. 438ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * The buffer needs to be large enough to hold two samples (4 bytes) and 448ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen * the naturally aligned timestamp (8 bytes). 458ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen */ 468ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen uint8_t data[ALIGN(4, sizeof(s64)) + sizeof(s64)] ____cacheline_aligned; 478ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 488ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 498ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_wakeup(struct ad7266_state *st) 508ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 518ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* Any read with >= 2 bytes will wake the device */ 528ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return spi_read(st->spi, st->data, 2); 538ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 548ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 558ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_powerdown(struct ad7266_state *st) 568ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 578ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* Any read with < 2 bytes will powerdown the device */ 588ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return spi_read(st->spi, st->data, 1); 598ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 608ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 618ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_preenable(struct iio_dev *indio_dev) 628ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 638ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 648ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen int ret; 658ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 668ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = ad7266_wakeup(st); 678ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 688ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return ret; 698ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 708ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = iio_sw_buffer_preenable(indio_dev); 718ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 728ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ad7266_powerdown(st); 738ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 748ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return ret; 758ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 768ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 778ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_postdisable(struct iio_dev *indio_dev) 788ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 798ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 808ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return ad7266_powerdown(st); 818ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 828ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 838ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { 848ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .preenable = &ad7266_preenable, 858ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .postenable = &iio_triggered_buffer_postenable, 868ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .predisable = &iio_triggered_buffer_predisable, 878ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .postdisable = &ad7266_postdisable, 888ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 898ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 908ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic irqreturn_t ad7266_trigger_handler(int irq, void *p) 918ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 928ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct iio_poll_func *pf = p; 938ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct iio_dev *indio_dev = pf->indio_dev; 948ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 958ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen int ret; 968ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 978ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = spi_read(st->spi, st->data, 4); 988ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret == 0) { 99fce8abfda40a764f4662ee354c1646ec78061371Lars-Peter Clausen iio_push_to_buffers_with_timestamp(indio_dev, st->data, 100fce8abfda40a764f4662ee354c1646ec78061371Lars-Peter Clausen pf->timestamp); 1018ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 1028ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1038ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen iio_trigger_notify_done(indio_dev->trig); 1048ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1058ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return IRQ_HANDLED; 1068ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 1078ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1088ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic void ad7266_select_input(struct ad7266_state *st, unsigned int nr) 1098ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 1108ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned int i; 1118ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1128ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (st->fixed_addr) 1138ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return; 1148ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1158ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen switch (st->mode) { 1168ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen case AD7266_MODE_SINGLE_ENDED: 1178ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen nr >>= 1; 1188ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen break; 1198ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen case AD7266_MODE_PSEUDO_DIFF: 1208ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen nr |= 1; 1218ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen break; 1228ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen case AD7266_MODE_DIFF: 1238ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen nr &= ~1; 1248ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen break; 1258ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 1268ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1278ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen for (i = 0; i < 3; ++i) 1288ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen gpio_set_value(st->gpios[i].gpio, (bool)(nr & BIT(i))); 1298ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 1308ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1318ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_update_scan_mode(struct iio_dev *indio_dev, 1328ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen const unsigned long *scan_mask) 1338ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 1348ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 1358ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength); 1368ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1378ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ad7266_select_input(st, nr); 1388ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1398ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return 0; 1408ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 1418ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1428ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_read_single(struct ad7266_state *st, int *val, 1438ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned int address) 1448ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 1458ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen int ret; 1468ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1478ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ad7266_select_input(st, address); 1488ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1498ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = spi_sync(st->spi, &st->single_msg); 1508ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val = be16_to_cpu(st->data[address % 2]); 1518ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1528ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return ret; 1538ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 1548ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1558ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic int ad7266_read_raw(struct iio_dev *indio_dev, 1568ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct iio_chan_spec const *chan, int *val, int *val2, long m) 1578ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 1588ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 1598ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned long scale_uv; 1608ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen int ret; 1618ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1628ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen switch (m) { 1638ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen case IIO_CHAN_INFO_RAW: 1648ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (iio_buffer_enabled(indio_dev)) 1658ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return -EBUSY; 1668ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1678ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = ad7266_read_single(st, val, chan->address); 1688ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 1698ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return ret; 1708ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1718ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val = (*val >> 2) & 0xfff; 1728ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (chan->scan_type.sign == 's') 1738ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val = sign_extend32(*val, 11); 1748ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1758ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return IIO_VAL_INT; 1768ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen case IIO_CHAN_INFO_SCALE: 1778ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen scale_uv = (st->vref_uv * 100); 1788ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (st->mode == AD7266_MODE_DIFF) 1798ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen scale_uv *= 2; 1808ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (st->range == AD7266_RANGE_2VREF) 1818ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen scale_uv *= 2; 1828ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1838ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen scale_uv >>= chan->scan_type.realbits; 1848ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val = scale_uv / 100000; 1858ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val2 = (scale_uv % 100000) * 10; 1868ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return IIO_VAL_INT_PLUS_MICRO; 1878ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen case IIO_CHAN_INFO_OFFSET: 1888ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (st->range == AD7266_RANGE_2VREF && 1898ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->mode != AD7266_MODE_DIFF) 1908ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val = 2048; 1918ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen else 1928ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen *val = 0; 1938ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return IIO_VAL_INT; 1948ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 1958ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return -EINVAL; 1968ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 1978ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 1988ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_CHAN(_chan, _sign) { \ 1998ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .type = IIO_VOLTAGE, \ 2008ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .indexed = 1, \ 2018ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channel = (_chan), \ 2028ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .address = (_chan), \ 2033234ac7e6a96046bd2c996ed93cf843057c3e627Jonathan Cameron .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 2043234ac7e6a96046bd2c996ed93cf843057c3e627Jonathan Cameron .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \ 2053234ac7e6a96046bd2c996ed93cf843057c3e627Jonathan Cameron | BIT(IIO_CHAN_INFO_OFFSET), \ 2068ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_index = (_chan), \ 2078ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_type = { \ 2088ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .sign = (_sign), \ 2098ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .realbits = 12, \ 2108ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .storagebits = 16, \ 2118ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .shift = 2, \ 2128ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .endianness = IIO_BE, \ 2138ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, \ 2148ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 2158ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2168ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_DECLARE_SINGLE_ENDED_CHANNELS(_name, _sign) \ 2178ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenconst struct iio_chan_spec ad7266_channels_##_name[] = { \ 2188ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(0, (_sign)), \ 2198ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(1, (_sign)), \ 2208ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(2, (_sign)), \ 2218ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(3, (_sign)), \ 2228ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(4, (_sign)), \ 2238ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(5, (_sign)), \ 2248ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(6, (_sign)), \ 2258ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(7, (_sign)), \ 2268ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(8, (_sign)), \ 2278ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(9, (_sign)), \ 2288ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(10, (_sign)), \ 2298ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(11, (_sign)), \ 2308ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen IIO_CHAN_SOFT_TIMESTAMP(13), \ 2318ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 2328ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2338ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(_name, _sign) \ 2348ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenconst struct iio_chan_spec ad7266_channels_##_name##_fixed[] = { \ 2358ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(0, (_sign)), \ 2368ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN(1, (_sign)), \ 2378ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen IIO_CHAN_SOFT_TIMESTAMP(2), \ 2388ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 2398ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2408ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_SINGLE_ENDED_CHANNELS(u, 'u'); 2418ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_SINGLE_ENDED_CHANNELS(s, 's'); 2428ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(u, 'u'); 2438ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(s, 's'); 2448ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2458ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_CHAN_DIFF(_chan, _sign) { \ 2468ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .type = IIO_VOLTAGE, \ 2478ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .indexed = 1, \ 2488ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channel = (_chan) * 2, \ 2498ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channel2 = (_chan) * 2 + 1, \ 2508ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .address = (_chan), \ 2513234ac7e6a96046bd2c996ed93cf843057c3e627Jonathan Cameron .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ 2523234ac7e6a96046bd2c996ed93cf843057c3e627Jonathan Cameron .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \ 2533234ac7e6a96046bd2c996ed93cf843057c3e627Jonathan Cameron | BIT(IIO_CHAN_INFO_OFFSET), \ 2548ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_index = (_chan), \ 2558ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_type = { \ 2568ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .sign = _sign, \ 2578ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .realbits = 12, \ 2588ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .storagebits = 16, \ 2598ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .shift = 2, \ 2608ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .endianness = IIO_BE, \ 2618ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, \ 2628ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .differential = 1, \ 2638ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 2648ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2658ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_DECLARE_DIFF_CHANNELS(_name, _sign) \ 2668ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenconst struct iio_chan_spec ad7266_channels_diff_##_name[] = { \ 2678ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(0, (_sign)), \ 2688ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(1, (_sign)), \ 2698ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(2, (_sign)), \ 2708ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(3, (_sign)), \ 2718ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(4, (_sign)), \ 2728ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(5, (_sign)), \ 2738ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen IIO_CHAN_SOFT_TIMESTAMP(6), \ 2748ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 2758ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2768ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_DIFF_CHANNELS(s, 's'); 2778ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_DIFF_CHANNELS(u, 'u'); 2788ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2798ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_DECLARE_DIFF_CHANNELS_FIXED(_name, _sign) \ 2808ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenconst struct iio_chan_spec ad7266_channels_diff_fixed_##_name[] = { \ 2818ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(0, (_sign)), \ 2828ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen AD7266_CHAN_DIFF(1, (_sign)), \ 2838ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen IIO_CHAN_SOFT_TIMESTAMP(2), \ 2848ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 2858ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2868ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_DIFF_CHANNELS_FIXED(s, 's'); 2878ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic AD7266_DECLARE_DIFF_CHANNELS_FIXED(u, 'u'); 2888ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2898ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic const struct iio_info ad7266_info = { 2908ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .read_raw = &ad7266_read_raw, 2918ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .update_scan_mode = &ad7266_update_scan_mode, 2928ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .driver_module = THIS_MODULE, 2938ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 2948ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 2952bdb3afcecff232b8670648755a222494d00981dPeter Meerwaldstatic const unsigned long ad7266_available_scan_masks[] = { 2968ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x003, 2978ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x00c, 2988ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x030, 2998ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x0c0, 3008ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x300, 3018ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0xc00, 3028ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x000, 3038ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 3048ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3052bdb3afcecff232b8670648755a222494d00981dPeter Meerwaldstatic const unsigned long ad7266_available_scan_masks_diff[] = { 3068ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x003, 3078ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x00c, 3088ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x030, 3098ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x000, 3108ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 3118ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3122bdb3afcecff232b8670648755a222494d00981dPeter Meerwaldstatic const unsigned long ad7266_available_scan_masks_fixed[] = { 3138ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x003, 3148ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 0x000, 3158ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 3168ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3178ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstruct ad7266_chan_info { 3188ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen const struct iio_chan_spec *channels; 3198ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned int num_channels; 3202bdb3afcecff232b8670648755a222494d00981dPeter Meerwald const unsigned long *scan_masks; 3218ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 3228ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3238ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen#define AD7266_CHAN_INFO_INDEX(_differential, _signed, _fixed) \ 3248ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen (((_differential) << 2) | ((_signed) << 1) | ((_fixed) << 0)) 3258ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3268ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic const struct ad7266_chan_info ad7266_chan_infos[] = { 3278ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(0, 0, 0)] = { 3288ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_u, 3298ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_u), 3308ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks, 3318ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3328ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(0, 0, 1)] = { 3338ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_u_fixed, 3348ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_u_fixed), 3358ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks_fixed, 3368ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3378ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(0, 1, 0)] = { 3388ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_s, 3398ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_s), 3408ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks, 3418ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3428ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(0, 1, 1)] = { 3438ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_s_fixed, 3448ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_s_fixed), 3458ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks_fixed, 3468ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3478ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(1, 0, 0)] = { 3488ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_diff_u, 3498ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_diff_u), 3508ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks_diff, 3518ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3528ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(1, 0, 1)] = { 3538ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_diff_fixed_u, 3548ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_u), 3558ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks_fixed, 3568ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3578ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(1, 1, 0)] = { 3588ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_diff_s, 3598ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_diff_s), 3608ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks_diff, 3618ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3628ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen [AD7266_CHAN_INFO_INDEX(1, 1, 1)] = { 3638ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .channels = ad7266_channels_diff_fixed_s, 3648ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_s), 3658ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .scan_masks = ad7266_available_scan_masks_fixed, 3668ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 3678ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 3688ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 369fc52692c49969ec72595766929b9f54ac402da34Greg Kroah-Hartmanstatic void ad7266_init_channels(struct iio_dev *indio_dev) 3708ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 3718ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 3728ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen bool is_differential, is_signed; 3738ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen const struct ad7266_chan_info *chan_info; 3748ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen int i; 3758ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3768ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen is_differential = st->mode != AD7266_MODE_SINGLE_ENDED; 3778ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen is_signed = (st->range == AD7266_RANGE_2VREF) | 3788ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen (st->mode == AD7266_MODE_DIFF); 3798ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3808ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr); 3818ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen chan_info = &ad7266_chan_infos[i]; 3828ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3838ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->channels = chan_info->channels; 3848ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->num_channels = chan_info->num_channels; 3858ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->available_scan_masks = chan_info->scan_masks; 3868ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->masklength = chan_info->num_channels - 1; 3878ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 3888ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 3898ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic const char * const ad7266_gpio_labels[] = { 3908ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen "AD0", "AD1", "AD2", 3918ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 3928ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 393fc52692c49969ec72595766929b9f54ac402da34Greg Kroah-Hartmanstatic int ad7266_probe(struct spi_device *spi) 3948ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 3958ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_platform_data *pdata = spi->dev.platform_data; 3968ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct iio_dev *indio_dev; 3978ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st; 3988ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen unsigned int i; 3998ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen int ret; 4008ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 401ded4fef934768adee9d31f15831513d7d76c360bSachin Kamat indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); 4028ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (indio_dev == NULL) 4038ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return -ENOMEM; 4048ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4058ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st = iio_priv(indio_dev); 4068ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 407ded4fef934768adee9d31f15831513d7d76c360bSachin Kamat st->reg = devm_regulator_get(&spi->dev, "vref"); 4088ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (!IS_ERR_OR_NULL(st->reg)) { 4098ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = regulator_enable(st->reg); 4108ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 411ded4fef934768adee9d31f15831513d7d76c360bSachin Kamat return ret; 4128ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 41336ce0c1c3ab7ea54fa6c2b3a0803c7ab0adcefbfAxel Lin ret = regulator_get_voltage(st->reg); 41436ce0c1c3ab7ea54fa6c2b3a0803c7ab0adcefbfAxel Lin if (ret < 0) 41536ce0c1c3ab7ea54fa6c2b3a0803c7ab0adcefbfAxel Lin goto error_disable_reg; 41636ce0c1c3ab7ea54fa6c2b3a0803c7ab0adcefbfAxel Lin 41736ce0c1c3ab7ea54fa6c2b3a0803c7ab0adcefbfAxel Lin st->vref_uv = ret; 4188ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } else { 4198ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* Use internal reference */ 4208ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->vref_uv = 2500000; 4218ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 4228ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4238ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (pdata) { 4248ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->fixed_addr = pdata->fixed_addr; 4258ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->mode = pdata->mode; 4268ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->range = pdata->range; 4278ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4288ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (!st->fixed_addr) { 4298ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) { 4308ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->gpios[i].gpio = pdata->addr_gpios[i]; 4318ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->gpios[i].flags = GPIOF_OUT_INIT_LOW; 4328ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->gpios[i].label = ad7266_gpio_labels[i]; 4338ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 4348ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = gpio_request_array(st->gpios, 4358ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ARRAY_SIZE(st->gpios)); 4368ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 4378ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen goto error_disable_reg; 4388ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 4398ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } else { 4408ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->fixed_addr = true; 4418ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->range = AD7266_RANGE_VREF; 4428ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->mode = AD7266_MODE_DIFF; 4438ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen } 4448ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4458ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen spi_set_drvdata(spi, indio_dev); 4468ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->spi = spi; 4478ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4488ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->dev.parent = &spi->dev; 4498ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->name = spi_get_device_id(spi)->name; 4508ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->modes = INDIO_DIRECT_MODE; 4518ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen indio_dev->info = &ad7266_info; 4528ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4538ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ad7266_init_channels(indio_dev); 4548ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4558ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* wakeup */ 4568ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[0].rx_buf = &st->data; 4578ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[0].len = 2; 4588ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[0].cs_change = 1; 4598ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* conversion */ 4608ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[1].rx_buf = &st->data; 4618ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[1].len = 4; 4628ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[1].cs_change = 1; 4638ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen /* powerdown */ 4648ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[2].tx_buf = &st->data; 4658ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen st->single_xfer[2].len = 1; 4668ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4678ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen spi_message_init(&st->single_msg); 4688ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen spi_message_add_tail(&st->single_xfer[0], &st->single_msg); 4698ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen spi_message_add_tail(&st->single_xfer[1], &st->single_msg); 4708ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen spi_message_add_tail(&st->single_xfer[2], &st->single_msg); 4718ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4728ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, 4738ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen &ad7266_trigger_handler, &iio_triggered_buffer_setup_ops); 4748ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 4758ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen goto error_free_gpios; 4768ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4778ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen ret = iio_device_register(indio_dev); 4788ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (ret) 4798ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen goto error_buffer_cleanup; 4808ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4818ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return 0; 4828ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4838ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenerror_buffer_cleanup: 4848ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen iio_triggered_buffer_cleanup(indio_dev); 4858ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenerror_free_gpios: 4868ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (!st->fixed_addr) 4878ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); 4888ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenerror_disable_reg: 4898ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (!IS_ERR_OR_NULL(st->reg)) 4908ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen regulator_disable(st->reg); 4918ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 4928ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return ret; 4938ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 4948ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 495fc52692c49969ec72595766929b9f54ac402da34Greg Kroah-Hartmanstatic int ad7266_remove(struct spi_device *spi) 4968ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen{ 4978ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct iio_dev *indio_dev = spi_get_drvdata(spi); 4988ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen struct ad7266_state *st = iio_priv(indio_dev); 4998ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 5008ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen iio_device_unregister(indio_dev); 5018ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen iio_triggered_buffer_cleanup(indio_dev); 5028ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen if (!st->fixed_addr) 5038ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); 504ded4fef934768adee9d31f15831513d7d76c360bSachin Kamat if (!IS_ERR_OR_NULL(st->reg)) 5058ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen regulator_disable(st->reg); 5068ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 5078ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen return 0; 5088ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen} 5098ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 5108ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic const struct spi_device_id ad7266_id[] = { 5118ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen {"ad7265", 0}, 5128ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen {"ad7266", 0}, 5138ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen { } 5148ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 5158ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter ClausenMODULE_DEVICE_TABLE(spi, ad7266_id); 5168ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 5178ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenstatic struct spi_driver ad7266_driver = { 5188ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .driver = { 5198ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .name = "ad7266", 5208ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .owner = THIS_MODULE, 5218ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen }, 5228ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .probe = ad7266_probe, 523fc52692c49969ec72595766929b9f54ac402da34Greg Kroah-Hartman .remove = ad7266_remove, 5248ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen .id_table = ad7266_id, 5258ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen}; 5268ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausenmodule_spi_driver(ad7266_driver); 5278ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter Clausen 5288ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter ClausenMODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); 5298ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter ClausenMODULE_DESCRIPTION("Analog Devices AD7266/65 ADC"); 5308ec4cf5303e03941fa5fd91bbb9c85bd4ae88c47Lars-Peter ClausenMODULE_LICENSE("GPL v2"); 531