1b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich/* 24397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * AD7879/AD7889 based touchscreen and GPIO driver 3b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * 44397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc. 5b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * 64397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * Licensed under the GPL-2 or later. 7b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * 8b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * History: 9b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (c) 2005 David Brownell 10b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (c) 2006 Nokia Corporation 11b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Various changes: Imre Deak <imre.deak@nokia.com> 12b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * 13b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Using code from: 14b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * - corgi_ts.c 15b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (C) 2004-2005 Richard Purdie 16b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * - omap_ts.[hc], ads7846.h, ts_osk.c 17b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (C) 2002 MontaVista Software 18b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (C) 2004 Texas Instruments 19b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (C) 2005 Dirk Behme 20b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * - ad7877.c 21b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * Copyright (C) 2006-2008 Analog Devices Inc. 22b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich */ 23b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 24b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/device.h> 25b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/init.h> 26b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/delay.h> 27b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/input.h> 28b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/interrupt.h> 29b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/irq.h> 30b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/slab.h> 31b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/spi/spi.h> 32b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/i2c.h> 33ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich#include <linux/gpio.h> 34b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 35b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#include <linux/spi/ad7879.h> 36d2d8442d0094a7d4b585e2bbde31e3775dba7eb1Paul Gortmaker#include <linux/module.h> 374397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger#include "ad7879.h" 38b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 39b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_ZEROS 0 40b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_CTRL1 1 41b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_CTRL2 2 42b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_CTRL3 3 43b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_AUX1HIGH 4 44b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_AUX1LOW 5 45b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_TEMP1HIGH 6 46b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_TEMP1LOW 7 47b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_XPLUS 8 48b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_YPLUS 9 49b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_Z1 10 50b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_Z2 11 51b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_AUXVBAT 12 52b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_TEMP 13 53b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_REG_REVID 14 54b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 55b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich/* Control REG 1 */ 56b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_TMR(x) ((x & 0xFF) << 0) 57b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_ACQ(x) ((x & 0x3) << 8) 58b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_MODE_NOC (0 << 10) /* Do not convert */ 59b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_MODE_SCC (1 << 10) /* Single channel conversion */ 60b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_MODE_SEQ0 (2 << 10) /* Sequence 0 in Slave Mode */ 61b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_MODE_SEQ1 (3 << 10) /* Sequence 1 in Master Mode */ 62b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_MODE_INT (1 << 15) /* PENIRQ disabled INT enabled */ 63b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 64b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich/* Control REG 2 */ 65b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_FCD(x) ((x & 0x3) << 0) 66b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_RESET (1 << 4) 67b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_MFS(x) ((x & 0x3) << 5) 68b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_AVG(x) ((x & 0x3) << 7) 69b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_SER (1 << 9) /* non-differential */ 70b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_DFR (0 << 9) /* differential */ 71b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_GPIOPOL (1 << 10) 72b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_GPIODIR (1 << 11) 73b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_GPIO_DATA (1 << 12) 74b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_GPIO_EN (1 << 13) 75b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_PM(x) ((x & 0x3) << 14) 76b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_PM_SHUTDOWN (0) 77b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_PM_DYN (1) 78b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_PM_FULLON (2) 79b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 80b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich/* Control REG 3 */ 81b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_TEMPMASK_BIT (1<<15) 82b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_AUXVBATMASK_BIT (1<<14) 83b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_INTMODE_BIT (1<<13) 84b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_GPIOALERTMASK_BIT (1<<12) 85b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_AUXLOW_BIT (1<<11) 86b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_AUXHIGH_BIT (1<<10) 87b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_TEMPLOW_BIT (1<<9) 88b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_TEMPHIGH_BIT (1<<8) 89b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_YPLUS_BIT (1<<7) 90b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_XPLUS_BIT (1<<6) 91b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_Z1_BIT (1<<5) 92b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_Z2_BIT (1<<4) 93b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_AUX_BIT (1<<3) 94b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_VBAT_BIT (1<<2) 95b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define AD7879_TEMP_BIT (1<<1) 96b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 97b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichenum { 98b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich AD7879_SEQ_XPOS = 0, 99b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich AD7879_SEQ_YPOS = 1, 100b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich AD7879_SEQ_Z1 = 2, 101b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich AD7879_SEQ_Z2 = 3, 102b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich AD7879_NR_SENSE = 4, 103b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich}; 104b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 105b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define MAX_12BIT ((1<<12)-1) 106b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich#define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50) 107b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 108b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstruct ad7879 { 1094397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger const struct ad7879_bus_ops *bops; 1104397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger 1114397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger struct device *dev; 112b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct input_dev *input; 113b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct timer_list timer; 114ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich#ifdef CONFIG_GPIOLIB 115ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich struct gpio_chip gc; 11614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov struct mutex mutex; 117ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich#endif 1184397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger unsigned int irq; 11914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov bool disabled; /* P: input->mutex */ 12014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov bool suspended; /* P: input->mutex */ 121b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 conversion_data[AD7879_NR_SENSE]; 122b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich char phys[32]; 123b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u8 first_conversion_delay; 124b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u8 acquisition_time; 125b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u8 averaging; 126b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u8 pen_down_acc_interval; 127b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u8 median; 128b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 x_plate_ohms; 129b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 pressure_max; 130b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 cmd_crtl1; 131b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 cmd_crtl2; 132b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 cmd_crtl3; 133b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich int x; 134b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich int y; 135b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich int Rt; 136b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich}; 137b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 1384397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic int ad7879_read(struct ad7879 *ts, u8 reg) 1394397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger{ 1404397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger return ts->bops->read(ts->dev, reg); 1414397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger} 1424397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger 1434397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic int ad7879_multi_read(struct ad7879 *ts, u8 first_reg, u8 count, u16 *buf) 1444397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger{ 1454397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger return ts->bops->multi_read(ts->dev, first_reg, count, buf); 1464397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger} 1474397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger 1484397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic int ad7879_write(struct ad7879 *ts, u8 reg, u16 val) 1494397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger{ 1504397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger return ts->bops->write(ts->dev, reg, val); 1514397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger} 152b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 153963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerichstatic int ad7879_report(struct ad7879 *ts) 154b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 155b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct input_dev *input_dev = ts->input; 156b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich unsigned Rt; 157b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 x, y, z1, z2; 158b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 159b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich x = ts->conversion_data[AD7879_SEQ_XPOS] & MAX_12BIT; 160b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich y = ts->conversion_data[AD7879_SEQ_YPOS] & MAX_12BIT; 161b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich z1 = ts->conversion_data[AD7879_SEQ_Z1] & MAX_12BIT; 162b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich z2 = ts->conversion_data[AD7879_SEQ_Z2] & MAX_12BIT; 163b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 164b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich /* 165b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich * The samples processed here are already preprocessed by the AD7879. 1664397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * The preprocessing function consists of a median and an averaging 1674397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * filter. The combination of these two techniques provides a robust 1684397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * solution, discarding the spurious noise in the signal and keeping 1694397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * only the data of interest. The size of both filters is 1704397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * programmable. (dev.platform_data, see linux/spi/ad7879.h) Other 1714397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * user-programmable conversion controls include variable acquisition 1724397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * time, and first conversion delay. Up to 16 averages can be taken 1734397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger * per conversion. 174b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich */ 175b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 176b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (likely(x && z1)) { 177b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich /* compute touch pressure resistance using equation #1 */ 178b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich Rt = (z2 - z1) * x * ts->x_plate_ohms; 179b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich Rt /= z1; 180b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich Rt = (Rt + 2047) >> 12; 181b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 182b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich /* 183b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich * Sample found inconsistent, pressure is beyond 184b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich * the maximum. Don't report it to user space. 185b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich */ 186b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich if (Rt > ts->pressure_max) 187b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich return -EINVAL; 188b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich 189b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich /* 190b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich * Note that we delay reporting events by one sample. 191b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich * This is done to avoid reporting last sample of the 192b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich * touch sequence, which may be incomplete if finger 193b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich * leaves the surface before last reading is taken. 194b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich */ 195b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich if (timer_pending(&ts->timer)) { 196b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich /* Touch continues */ 197963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich input_report_key(input_dev, BTN_TOUCH, 1); 198b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich input_report_abs(input_dev, ABS_X, ts->x); 199b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich input_report_abs(input_dev, ABS_Y, ts->y); 200b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich input_report_abs(input_dev, ABS_PRESSURE, ts->Rt); 201b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich input_sync(input_dev); 202b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich } 203b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich 204b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich ts->x = x; 205b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich ts->y = y; 206b584efc9ea7575d3235cfd745e8a28201d2c37f6Michael Hennerich ts->Rt = Rt; 207963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich 208963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich return 0; 209b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 210963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich 211963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich return -EINVAL; 212b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 213b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 214b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstatic void ad7879_ts_event_release(struct ad7879 *ts) 215b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 216b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct input_dev *input_dev = ts->input; 217b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 218b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_report_abs(input_dev, ABS_PRESSURE, 0); 219963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich input_report_key(input_dev, BTN_TOUCH, 0); 220b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_sync(input_dev); 221b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 222b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 223b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstatic void ad7879_timer(unsigned long handle) 224b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 225b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct ad7879 *ts = (void *)handle; 226b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 227b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ad7879_ts_event_release(ts); 228b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 229b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 230b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstatic irqreturn_t ad7879_irq(int irq, void *handle) 231b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 232b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct ad7879 *ts = handle; 233b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 2344397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_multi_read(ts, AD7879_REG_XPLUS, AD7879_NR_SENSE, ts->conversion_data); 235b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 236963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich if (!ad7879_report(ts)) 237963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); 238b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 239b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich return IRQ_HANDLED; 240b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 241b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 24214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhovstatic void __ad7879_enable(struct ad7879 *ts) 243b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 2444397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); 2454397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_write(ts, AD7879_REG_CTRL3, ts->cmd_crtl3); 2464397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_write(ts, AD7879_REG_CTRL1, ts->cmd_crtl1); 24714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 24814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov enable_irq(ts->irq); 249b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 250b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 25114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhovstatic void __ad7879_disable(struct ad7879 *ts) 252b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 2534fecc2088fd02ce8a6580c12822987d3c6bab9b8Michael Hennerich u16 reg = (ts->cmd_crtl2 & ~AD7879_PM(-1)) | 2544fecc2088fd02ce8a6580c12822987d3c6bab9b8Michael Hennerich AD7879_PM(AD7879_PM_SHUTDOWN); 25514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov disable_irq(ts->irq); 256b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 25714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (del_timer_sync(&ts->timer)) 25814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov ad7879_ts_event_release(ts); 259b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 2604fecc2088fd02ce8a6580c12822987d3c6bab9b8Michael Hennerich ad7879_write(ts, AD7879_REG_CTRL2, reg); 26114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov} 262b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 263b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 26414fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhovstatic int ad7879_open(struct input_dev *input) 26514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov{ 26614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov struct ad7879 *ts = input_get_drvdata(input); 267b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 26814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov /* protected by input->mutex */ 26914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (!ts->disabled && !ts->suspended) 27014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_enable(ts); 27114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 27214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov return 0; 273b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 274b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 27514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhovstatic void ad7879_close(struct input_dev* input) 276b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 27714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov struct ad7879 *ts = input_get_drvdata(input); 27814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 27914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov /* protected by input->mutex */ 28014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (!ts->disabled && !ts->suspended) 28114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_disable(ts); 28214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov} 28314fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 2848672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov#ifdef CONFIG_PM_SLEEP 2858672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhovstatic int ad7879_suspend(struct device *dev) 28614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov{ 2878672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov struct ad7879 *ts = dev_get_drvdata(dev); 2888672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov 28914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_lock(&ts->input->mutex); 29014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 29114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (!ts->suspended && !ts->disabled && ts->input->users) 29214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_disable(ts); 29314fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 29414fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov ts->suspended = true; 29514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 29614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_unlock(&ts->input->mutex); 2978672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov 2988672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov return 0; 29914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov} 30014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 3018672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhovstatic int ad7879_resume(struct device *dev) 30214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov{ 3038672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov struct ad7879 *ts = dev_get_drvdata(dev); 3048672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov 30514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_lock(&ts->input->mutex); 306b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 30714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (ts->suspended && !ts->disabled && ts->input->users) 30814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_enable(ts); 30914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 31014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov ts->suspended = false; 31114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 31214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_unlock(&ts->input->mutex); 3138672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov 3148672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov return 0; 31514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov} 3168672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov#endif 3178672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry Torokhov 3188672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry TorokhovSIMPLE_DEV_PM_OPS(ad7879_pm_ops, ad7879_suspend, ad7879_resume); 3198672bd93d3d67b18a2b067ece30dabcda11f8cdeDmitry TorokhovEXPORT_SYMBOL(ad7879_pm_ops); 32014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 32114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhovstatic void ad7879_toggle(struct ad7879 *ts, bool disable) 32214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov{ 32314fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_lock(&ts->input->mutex); 32414fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 32514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (!ts->suspended && ts->input->users != 0) { 32614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 32714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (disable) { 32814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (ts->disabled) 32914fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_enable(ts); 33014fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov } else { 33114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov if (!ts->disabled) 33214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_disable(ts); 33314fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov } 334b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 335b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 33614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov ts->disabled = disable; 33714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 33814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_unlock(&ts->input->mutex); 339b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 340b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 341b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstatic ssize_t ad7879_disable_show(struct device *dev, 342b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct device_attribute *attr, char *buf) 343b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 344b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct ad7879 *ts = dev_get_drvdata(dev); 345b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 346b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich return sprintf(buf, "%u\n", ts->disabled); 347b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 348b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 349b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstatic ssize_t ad7879_disable_store(struct device *dev, 350b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct device_attribute *attr, 351b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich const char *buf, size_t count) 352b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 353b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct ad7879 *ts = dev_get_drvdata(dev); 35476496e7a02e99d42844f4fffa145b81e513e7acdJJ Ding unsigned int val; 355b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich int error; 356b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 35776496e7a02e99d42844f4fffa145b81e513e7acdJJ Ding error = kstrtouint(buf, 10, &val); 358b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (error) 359b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich return error; 360b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 36114fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov ad7879_toggle(ts, val); 362b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 363b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich return count; 364b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 365b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 366b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerichstatic DEVICE_ATTR(disable, 0664, ad7879_disable_show, ad7879_disable_store); 367b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 368ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerichstatic struct attribute *ad7879_attributes[] = { 369ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich &dev_attr_disable.attr, 370ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich NULL 371ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich}; 372ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 373ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerichstatic const struct attribute_group ad7879_attr_group = { 374ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich .attrs = ad7879_attributes, 375ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich}; 376ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 377ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich#ifdef CONFIG_GPIOLIB 378ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerichstatic int ad7879_gpio_direction_input(struct gpio_chip *chip, 379ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich unsigned gpio) 380b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 381ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich struct ad7879 *ts = container_of(chip, struct ad7879, gc); 382ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich int err; 383b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 384ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich mutex_lock(&ts->mutex); 385ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL; 3864397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); 387ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich mutex_unlock(&ts->mutex); 388ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 389ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich return err; 390b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 391b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 392ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerichstatic int ad7879_gpio_direction_output(struct gpio_chip *chip, 393ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich unsigned gpio, int level) 394b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 395ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich struct ad7879 *ts = container_of(chip, struct ad7879, gc); 396ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich int err; 397b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 398ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich mutex_lock(&ts->mutex); 399ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 &= ~AD7879_GPIODIR; 400ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIOPOL; 401ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (level) 402ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 |= AD7879_GPIO_DATA; 403ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich else 404ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 &= ~AD7879_GPIO_DATA; 405ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 4064397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); 407ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich mutex_unlock(&ts->mutex); 408ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 409ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich return err; 410ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich} 411ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 412ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerichstatic int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio) 413ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich{ 414ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich struct ad7879 *ts = container_of(chip, struct ad7879, gc); 415ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich u16 val; 416b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 417b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich mutex_lock(&ts->mutex); 4184397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger val = ad7879_read(ts, AD7879_REG_CTRL2); 419b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich mutex_unlock(&ts->mutex); 420b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 421ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich return !!(val & AD7879_GPIO_DATA); 422b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 423b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 424ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerichstatic void ad7879_gpio_set_value(struct gpio_chip *chip, 425ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich unsigned gpio, int value) 426ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich{ 427ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich struct ad7879 *ts = container_of(chip, struct ad7879, gc); 428b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 429ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich mutex_lock(&ts->mutex); 430ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (value) 431ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 |= AD7879_GPIO_DATA; 432ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich else 433ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 &= ~AD7879_GPIO_DATA; 434b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 4354397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); 436ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich mutex_unlock(&ts->mutex); 437ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich} 438ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 4394397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic int ad7879_gpio_add(struct ad7879 *ts, 4404397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger const struct ad7879_platform_data *pdata) 441ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich{ 442ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich int ret = 0; 443ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 44414fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov mutex_init(&ts->mutex); 44514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 446ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (pdata->gpio_export) { 447ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.direction_input = ad7879_gpio_direction_input; 448ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.direction_output = ad7879_gpio_direction_output; 449ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.get = ad7879_gpio_get_value; 450ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.set = ad7879_gpio_set_value; 451ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.can_sleep = 1; 452ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.base = pdata->gpio_base; 453ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.ngpio = 1; 454ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.label = "AD7879-GPIO"; 455ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.owner = THIS_MODULE; 4564397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ts->gc.dev = ts->dev; 457ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 458ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ret = gpiochip_add(&ts->gc); 459ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (ret) 4604397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(ts->dev, "failed to register gpio %d\n", 461ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.base); 462ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich } 463ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 464ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich return ret; 465ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich} 466ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 4674397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic void ad7879_gpio_remove(struct ad7879 *ts) 468ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich{ 4694397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger const struct ad7879_platform_data *pdata = ts->dev->platform_data; 470ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich int ret; 471ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 472ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (pdata->gpio_export) { 473ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ret = gpiochip_remove(&ts->gc); 474ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (ret) 4754397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(ts->dev, "failed to remove gpio %d\n", 476ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->gc.base); 477ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich } 478ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich} 479ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich#else 4804397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic inline int ad7879_gpio_add(struct ad7879 *ts, 4814397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger const struct ad7879_platform_data *pdata) 482ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich{ 483ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich return 0; 484ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich} 485ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 4864397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstatic inline void ad7879_gpio_remove(struct ad7879 *ts) 487ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich{ 488ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich} 489ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich#endif 490b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 4914397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingerstruct ad7879 *ad7879_probe(struct device *dev, u8 devid, unsigned int irq, 4924397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger const struct ad7879_bus_ops *bops) 493b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 4944397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger struct ad7879_platform_data *pdata = dev->platform_data; 4954397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger struct ad7879 *ts; 496b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich struct input_dev *input_dev; 497b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich int err; 498b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich u16 revid; 499b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 5004397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger if (!irq) { 5014397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(dev, "no IRQ?\n"); 5024397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = -EINVAL; 5034397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger goto err_out; 504b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 505b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 506b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (!pdata) { 5074397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(dev, "no platform data?\n"); 5084397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = -EINVAL; 5094397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger goto err_out; 510b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 511b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 5124397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ts = kzalloc(sizeof(*ts), GFP_KERNEL); 513b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_dev = input_allocate_device(); 5144397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger if (!ts || !input_dev) { 5154397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = -ENOMEM; 5164397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger goto err_free_mem; 5174397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger } 518b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 5194397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ts->bops = bops; 5204397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ts->dev = dev; 521b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->input = input_dev; 52214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov ts->irq = irq; 523b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 524b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich setup_timer(&ts->timer, ad7879_timer, (unsigned long) ts); 5254397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger 526b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->x_plate_ohms = pdata->x_plate_ohms ? : 400; 527b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->pressure_max = pdata->pressure_max ? : ~0; 528b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 529b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->first_conversion_delay = pdata->first_conversion_delay; 530b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->acquisition_time = pdata->acquisition_time; 531b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->averaging = pdata->averaging; 532b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->pen_down_acc_interval = pdata->pen_down_acc_interval; 533b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich ts->median = pdata->median; 534b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 5354397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); 536b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 537b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_dev->name = "AD7879 Touchscreen"; 538b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_dev->phys = ts->phys; 5394397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger input_dev->dev.parent = dev; 5404397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger input_dev->id.bustype = bops->bustype; 541b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 54214fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov input_dev->open = ad7879_open; 54314fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov input_dev->close = ad7879_close; 54414fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 54514fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov input_set_drvdata(input_dev, ts); 54614fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 547b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich __set_bit(EV_ABS, input_dev->evbit); 548b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich __set_bit(ABS_X, input_dev->absbit); 549b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich __set_bit(ABS_Y, input_dev->absbit); 550b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich __set_bit(ABS_PRESSURE, input_dev->absbit); 551b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 552963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich __set_bit(EV_KEY, input_dev->evbit); 553963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich __set_bit(BTN_TOUCH, input_dev->keybit); 554963ce8ae6dbc7c8dffb1b117ba14673d40b22ddaMichael Hennerich 555b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_set_abs_params(input_dev, ABS_X, 556b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich pdata->x_min ? : 0, 557b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich pdata->x_max ? : MAX_12BIT, 558b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 0, 0); 559b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_set_abs_params(input_dev, ABS_Y, 560b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich pdata->y_min ? : 0, 561b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich pdata->y_max ? : MAX_12BIT, 562b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 0, 0); 563b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_set_abs_params(input_dev, ABS_PRESSURE, 564b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich pdata->pressure_min, pdata->pressure_max, 0, 0); 565b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 5664397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET); 567b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (err < 0) { 5684397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(dev, "Failed to write %s\n", input_dev->name); 569b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich goto err_free_mem; 570b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 571b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 5724397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger revid = ad7879_read(ts, AD7879_REG_REVID); 5734397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger input_dev->id.product = (revid & 0xff); 5744397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger input_dev->id.version = revid >> 8; 5754397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger if (input_dev->id.product != devid) { 5764397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(dev, "Failed to probe %s (%x vs %x)\n", 5774397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger input_dev->name, devid, revid); 578b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich err = -ENODEV; 579b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich goto err_free_mem; 580b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 581b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 582ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl3 = AD7879_YPLUS_BIT | 583ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_XPLUS_BIT | 584ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_Z2_BIT | 585ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_Z1_BIT | 586ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_TEMPMASK_BIT | 587ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_AUXVBATMASK_BIT | 588ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_GPIOALERTMASK_BIT; 589ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 590ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR | 591ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_AVG(ts->averaging) | 592ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_MFS(ts->median) | 593ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_FCD(ts->first_conversion_delay); 594ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 595ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 | 596ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_ACQ(ts->acquisition_time) | 597ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich AD7879_TMR(ts->pen_down_acc_interval); 598ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 5994397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = request_threaded_irq(ts->irq, NULL, ad7879_irq, 6007cd7a82d16ad5a711338c1baf2316f24121d93aaDmitry Torokhov IRQF_TRIGGER_FALLING, 6014397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_name(dev), ts); 602b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (err) { 6034397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger dev_err(dev, "irq %d busy?\n", ts->irq); 604b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich goto err_free_mem; 605b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich } 606b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 60714fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov __ad7879_disable(ts); 60814fbbc36d126d7ec7717144def386b9fc4c7fba2Dmitry Torokhov 6094397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = sysfs_create_group(&dev->kobj, &ad7879_attr_group); 610b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (err) 611b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich goto err_free_irq; 612b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 6134397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger err = ad7879_gpio_add(ts, pdata); 614b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich if (err) 615b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich goto err_remove_attr; 616b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 617ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich err = input_register_device(input_dev); 618ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich if (err) 619ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich goto err_remove_gpio; 620ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennerich 6214397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger return ts; 622b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 623ec51b7f538c440bfa5a4d538133c659071c02155Michael Hennericherr_remove_gpio: 6244397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_gpio_remove(ts); 625b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennericherr_remove_attr: 6264397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger sysfs_remove_group(&dev->kobj, &ad7879_attr_group); 627b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennericherr_free_irq: 6284397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger free_irq(ts->irq, ts); 629b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennericherr_free_mem: 630b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_free_device(input_dev); 6314397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger kfree(ts); 6324397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingererr_out: 6334397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger return ERR_PTR(err); 634b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 6354397c98a8a60ba029f2d0051d0cbafe600f05d8cMike FrysingerEXPORT_SYMBOL(ad7879_probe); 636b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 6374397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysingervoid ad7879_remove(struct ad7879 *ts) 638b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich{ 6394397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger ad7879_gpio_remove(ts); 6404397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger sysfs_remove_group(&ts->dev->kobj, &ad7879_attr_group); 6414397c98a8a60ba029f2d0051d0cbafe600f05d8cMike Frysinger free_irq(ts->irq, ts); 642b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich input_unregister_device(ts->input); 643b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich kfree(ts); 644b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich} 6454397c98a8a60ba029f2d0051d0cbafe600f05d8cMike FrysingerEXPORT_SYMBOL(ad7879_remove); 646b4be468cc1e65110d9144751bf7079dad6f142b7Michael Hennerich 647b4be468cc1e65110d9144751bf7079dad6f142b7Michael HennerichMODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); 648b4be468cc1e65110d9144751bf7079dad6f142b7Michael HennerichMODULE_DESCRIPTION("AD7879(-1) touchscreen Driver"); 649b4be468cc1e65110d9144751bf7079dad6f142b7Michael HennerichMODULE_LICENSE("GPL"); 650