Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 1 | /* |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 2 | * AD7879/AD7889 based touchscreen and GPIO driver |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 3 | * |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 4 | * Copyright (C) 2008-2010 Michael Hennerich, Analog Devices Inc. |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 5 | * |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 6 | * Licensed under the GPL-2 or later. |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 7 | * |
| 8 | * History: |
| 9 | * Copyright (c) 2005 David Brownell |
| 10 | * Copyright (c) 2006 Nokia Corporation |
| 11 | * Various changes: Imre Deak <imre.deak@nokia.com> |
| 12 | * |
| 13 | * Using code from: |
| 14 | * - corgi_ts.c |
| 15 | * Copyright (C) 2004-2005 Richard Purdie |
| 16 | * - omap_ts.[hc], ads7846.h, ts_osk.c |
| 17 | * Copyright (C) 2002 MontaVista Software |
| 18 | * Copyright (C) 2004 Texas Instruments |
| 19 | * Copyright (C) 2005 Dirk Behme |
| 20 | * - ad7877.c |
| 21 | * Copyright (C) 2006-2008 Analog Devices Inc. |
| 22 | */ |
| 23 | |
| 24 | #include <linux/device.h> |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 25 | #include <linux/delay.h> |
| 26 | #include <linux/input.h> |
| 27 | #include <linux/interrupt.h> |
| 28 | #include <linux/irq.h> |
Randy Dunlap | a4deb14 | 2017-02-25 10:32:58 -0800 | [diff] [blame] | 29 | #include <linux/property.h> |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 30 | #include <linux/regmap.h> |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 31 | #include <linux/slab.h> |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 32 | #include <linux/gpio.h> |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 33 | |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 34 | #include <linux/input/touchscreen.h> |
Stefan Agner | 4774f40 | 2016-03-08 10:34:04 -0800 | [diff] [blame] | 35 | #include <linux/platform_data/ad7879.h> |
Paul Gortmaker | d2d8442 | 2011-07-03 13:53:48 -0400 | [diff] [blame] | 36 | #include <linux/module.h> |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 37 | #include "ad7879.h" |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 38 | |
| 39 | #define AD7879_REG_ZEROS 0 |
| 40 | #define AD7879_REG_CTRL1 1 |
| 41 | #define AD7879_REG_CTRL2 2 |
| 42 | #define AD7879_REG_CTRL3 3 |
| 43 | #define AD7879_REG_AUX1HIGH 4 |
| 44 | #define AD7879_REG_AUX1LOW 5 |
| 45 | #define AD7879_REG_TEMP1HIGH 6 |
| 46 | #define AD7879_REG_TEMP1LOW 7 |
| 47 | #define AD7879_REG_XPLUS 8 |
| 48 | #define AD7879_REG_YPLUS 9 |
| 49 | #define AD7879_REG_Z1 10 |
| 50 | #define AD7879_REG_Z2 11 |
| 51 | #define AD7879_REG_AUXVBAT 12 |
| 52 | #define AD7879_REG_TEMP 13 |
| 53 | #define AD7879_REG_REVID 14 |
| 54 | |
| 55 | /* Control REG 1 */ |
| 56 | #define AD7879_TMR(x) ((x & 0xFF) << 0) |
| 57 | #define AD7879_ACQ(x) ((x & 0x3) << 8) |
| 58 | #define AD7879_MODE_NOC (0 << 10) /* Do not convert */ |
| 59 | #define AD7879_MODE_SCC (1 << 10) /* Single channel conversion */ |
| 60 | #define AD7879_MODE_SEQ0 (2 << 10) /* Sequence 0 in Slave Mode */ |
| 61 | #define AD7879_MODE_SEQ1 (3 << 10) /* Sequence 1 in Master Mode */ |
| 62 | #define AD7879_MODE_INT (1 << 15) /* PENIRQ disabled INT enabled */ |
| 63 | |
| 64 | /* Control REG 2 */ |
| 65 | #define AD7879_FCD(x) ((x & 0x3) << 0) |
| 66 | #define AD7879_RESET (1 << 4) |
| 67 | #define AD7879_MFS(x) ((x & 0x3) << 5) |
| 68 | #define AD7879_AVG(x) ((x & 0x3) << 7) |
| 69 | #define AD7879_SER (1 << 9) /* non-differential */ |
| 70 | #define AD7879_DFR (0 << 9) /* differential */ |
| 71 | #define AD7879_GPIOPOL (1 << 10) |
| 72 | #define AD7879_GPIODIR (1 << 11) |
| 73 | #define AD7879_GPIO_DATA (1 << 12) |
| 74 | #define AD7879_GPIO_EN (1 << 13) |
| 75 | #define AD7879_PM(x) ((x & 0x3) << 14) |
| 76 | #define AD7879_PM_SHUTDOWN (0) |
| 77 | #define AD7879_PM_DYN (1) |
| 78 | #define AD7879_PM_FULLON (2) |
| 79 | |
| 80 | /* Control REG 3 */ |
| 81 | #define AD7879_TEMPMASK_BIT (1<<15) |
| 82 | #define AD7879_AUXVBATMASK_BIT (1<<14) |
| 83 | #define AD7879_INTMODE_BIT (1<<13) |
| 84 | #define AD7879_GPIOALERTMASK_BIT (1<<12) |
| 85 | #define AD7879_AUXLOW_BIT (1<<11) |
| 86 | #define AD7879_AUXHIGH_BIT (1<<10) |
| 87 | #define AD7879_TEMPLOW_BIT (1<<9) |
| 88 | #define AD7879_TEMPHIGH_BIT (1<<8) |
| 89 | #define AD7879_YPLUS_BIT (1<<7) |
| 90 | #define AD7879_XPLUS_BIT (1<<6) |
| 91 | #define AD7879_Z1_BIT (1<<5) |
| 92 | #define AD7879_Z2_BIT (1<<4) |
| 93 | #define AD7879_AUX_BIT (1<<3) |
| 94 | #define AD7879_VBAT_BIT (1<<2) |
| 95 | #define AD7879_TEMP_BIT (1<<1) |
| 96 | |
| 97 | enum { |
Stefan Agner | 5f2940c4a | 2016-03-08 10:34:38 -0800 | [diff] [blame] | 98 | AD7879_SEQ_YPOS = 0, |
| 99 | AD7879_SEQ_XPOS = 1, |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 100 | AD7879_SEQ_Z1 = 2, |
| 101 | AD7879_SEQ_Z2 = 3, |
| 102 | AD7879_NR_SENSE = 4, |
| 103 | }; |
| 104 | |
| 105 | #define MAX_12BIT ((1<<12)-1) |
| 106 | #define TS_PEN_UP_TIMEOUT msecs_to_jiffies(50) |
| 107 | |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 108 | struct ad7879 { |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 109 | struct regmap *regmap; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 110 | struct device *dev; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 111 | struct input_dev *input; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 112 | struct timer_list timer; |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 113 | #ifdef CONFIG_GPIOLIB |
| 114 | struct gpio_chip gc; |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 115 | struct mutex mutex; |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 116 | #endif |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 117 | unsigned int irq; |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 118 | bool disabled; /* P: input->mutex */ |
| 119 | bool suspended; /* P: input->mutex */ |
Michael Hennerich | 6680884 | 2012-07-06 10:44:19 -0700 | [diff] [blame] | 120 | bool swap_xy; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 121 | u16 conversion_data[AD7879_NR_SENSE]; |
| 122 | char phys[32]; |
| 123 | u8 first_conversion_delay; |
| 124 | u8 acquisition_time; |
| 125 | u8 averaging; |
| 126 | u8 pen_down_acc_interval; |
| 127 | u8 median; |
| 128 | u16 x_plate_ohms; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 129 | u16 cmd_crtl1; |
| 130 | u16 cmd_crtl2; |
| 131 | u16 cmd_crtl3; |
Michael Hennerich | b584efc | 2010-10-28 14:59:05 -0700 | [diff] [blame] | 132 | int x; |
| 133 | int y; |
| 134 | int Rt; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 135 | }; |
| 136 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 137 | static int ad7879_read(struct ad7879 *ts, u8 reg) |
| 138 | { |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 139 | unsigned int val; |
| 140 | int error; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 141 | |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 142 | error = regmap_read(ts->regmap, reg, &val); |
| 143 | if (error) { |
| 144 | dev_err(ts->dev, "failed to read register %#02x: %d\n", |
| 145 | reg, error); |
| 146 | return error; |
| 147 | } |
| 148 | |
| 149 | return val; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 150 | } |
| 151 | |
| 152 | static int ad7879_write(struct ad7879 *ts, u8 reg, u16 val) |
| 153 | { |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 154 | int error; |
| 155 | |
| 156 | error = regmap_write(ts->regmap, reg, val); |
| 157 | if (error) { |
| 158 | dev_err(ts->dev, |
| 159 | "failed to write %#04x to register %#02x: %d\n", |
| 160 | val, reg, error); |
| 161 | return error; |
| 162 | } |
| 163 | |
| 164 | return 0; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 165 | } |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 166 | |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 167 | static int ad7879_report(struct ad7879 *ts) |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 168 | { |
| 169 | struct input_dev *input_dev = ts->input; |
| 170 | unsigned Rt; |
| 171 | u16 x, y, z1, z2; |
| 172 | |
| 173 | x = ts->conversion_data[AD7879_SEQ_XPOS] & MAX_12BIT; |
| 174 | y = ts->conversion_data[AD7879_SEQ_YPOS] & MAX_12BIT; |
| 175 | z1 = ts->conversion_data[AD7879_SEQ_Z1] & MAX_12BIT; |
| 176 | z2 = ts->conversion_data[AD7879_SEQ_Z2] & MAX_12BIT; |
| 177 | |
Michael Hennerich | 6680884 | 2012-07-06 10:44:19 -0700 | [diff] [blame] | 178 | if (ts->swap_xy) |
| 179 | swap(x, y); |
| 180 | |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 181 | /* |
| 182 | * The samples processed here are already preprocessed by the AD7879. |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 183 | * The preprocessing function consists of a median and an averaging |
| 184 | * filter. The combination of these two techniques provides a robust |
| 185 | * solution, discarding the spurious noise in the signal and keeping |
| 186 | * only the data of interest. The size of both filters is |
Stefan Agner | 4774f40 | 2016-03-08 10:34:04 -0800 | [diff] [blame] | 187 | * programmable. (dev.platform_data, see linux/platform_data/ad7879.h) |
| 188 | * Other user-programmable conversion controls include variable |
| 189 | * acquisition time, and first conversion delay. Up to 16 averages can |
| 190 | * be taken per conversion. |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 191 | */ |
| 192 | |
| 193 | if (likely(x && z1)) { |
| 194 | /* compute touch pressure resistance using equation #1 */ |
| 195 | Rt = (z2 - z1) * x * ts->x_plate_ohms; |
| 196 | Rt /= z1; |
| 197 | Rt = (Rt + 2047) >> 12; |
| 198 | |
Michael Hennerich | b584efc | 2010-10-28 14:59:05 -0700 | [diff] [blame] | 199 | /* |
| 200 | * Sample found inconsistent, pressure is beyond |
| 201 | * the maximum. Don't report it to user space. |
| 202 | */ |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 203 | if (Rt > input_abs_get_max(input_dev, ABS_PRESSURE)) |
Michael Hennerich | b584efc | 2010-10-28 14:59:05 -0700 | [diff] [blame] | 204 | return -EINVAL; |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 205 | |
Michael Hennerich | b584efc | 2010-10-28 14:59:05 -0700 | [diff] [blame] | 206 | /* |
| 207 | * Note that we delay reporting events by one sample. |
| 208 | * This is done to avoid reporting last sample of the |
| 209 | * touch sequence, which may be incomplete if finger |
| 210 | * leaves the surface before last reading is taken. |
| 211 | */ |
| 212 | if (timer_pending(&ts->timer)) { |
| 213 | /* Touch continues */ |
| 214 | input_report_key(input_dev, BTN_TOUCH, 1); |
| 215 | input_report_abs(input_dev, ABS_X, ts->x); |
| 216 | input_report_abs(input_dev, ABS_Y, ts->y); |
| 217 | input_report_abs(input_dev, ABS_PRESSURE, ts->Rt); |
| 218 | input_sync(input_dev); |
| 219 | } |
| 220 | |
| 221 | ts->x = x; |
| 222 | ts->y = y; |
| 223 | ts->Rt = Rt; |
| 224 | |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 225 | return 0; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 226 | } |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 227 | |
| 228 | return -EINVAL; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 229 | } |
| 230 | |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 231 | static void ad7879_ts_event_release(struct ad7879 *ts) |
| 232 | { |
| 233 | struct input_dev *input_dev = ts->input; |
| 234 | |
| 235 | input_report_abs(input_dev, ABS_PRESSURE, 0); |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 236 | input_report_key(input_dev, BTN_TOUCH, 0); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 237 | input_sync(input_dev); |
| 238 | } |
| 239 | |
Kees Cook | ee03e3f | 2017-10-24 09:44:48 -0700 | [diff] [blame] | 240 | static void ad7879_timer(struct timer_list *t) |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 241 | { |
Kees Cook | ee03e3f | 2017-10-24 09:44:48 -0700 | [diff] [blame] | 242 | struct ad7879 *ts = from_timer(ts, t, timer); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 243 | |
| 244 | ad7879_ts_event_release(ts); |
| 245 | } |
| 246 | |
| 247 | static irqreturn_t ad7879_irq(int irq, void *handle) |
| 248 | { |
| 249 | struct ad7879 *ts = handle; |
| 250 | |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 251 | regmap_bulk_read(ts->regmap, AD7879_REG_XPLUS, |
| 252 | ts->conversion_data, AD7879_NR_SENSE); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 253 | |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 254 | if (!ad7879_report(ts)) |
| 255 | mod_timer(&ts->timer, jiffies + TS_PEN_UP_TIMEOUT); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 256 | |
| 257 | return IRQ_HANDLED; |
| 258 | } |
| 259 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 260 | static void __ad7879_enable(struct ad7879 *ts) |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 261 | { |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 262 | ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); |
| 263 | ad7879_write(ts, AD7879_REG_CTRL3, ts->cmd_crtl3); |
| 264 | ad7879_write(ts, AD7879_REG_CTRL1, ts->cmd_crtl1); |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 265 | |
| 266 | enable_irq(ts->irq); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 267 | } |
| 268 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 269 | static void __ad7879_disable(struct ad7879 *ts) |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 270 | { |
Michael Hennerich | 4fecc20 | 2011-08-02 15:41:37 -0700 | [diff] [blame] | 271 | u16 reg = (ts->cmd_crtl2 & ~AD7879_PM(-1)) | |
| 272 | AD7879_PM(AD7879_PM_SHUTDOWN); |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 273 | disable_irq(ts->irq); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 274 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 275 | if (del_timer_sync(&ts->timer)) |
| 276 | ad7879_ts_event_release(ts); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 277 | |
Michael Hennerich | 4fecc20 | 2011-08-02 15:41:37 -0700 | [diff] [blame] | 278 | ad7879_write(ts, AD7879_REG_CTRL2, reg); |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 279 | } |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 280 | |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 281 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 282 | static int ad7879_open(struct input_dev *input) |
| 283 | { |
| 284 | struct ad7879 *ts = input_get_drvdata(input); |
| 285 | |
| 286 | /* protected by input->mutex */ |
| 287 | if (!ts->disabled && !ts->suspended) |
| 288 | __ad7879_enable(ts); |
| 289 | |
| 290 | return 0; |
| 291 | } |
| 292 | |
| 293 | static void ad7879_close(struct input_dev* input) |
| 294 | { |
| 295 | struct ad7879 *ts = input_get_drvdata(input); |
| 296 | |
| 297 | /* protected by input->mutex */ |
| 298 | if (!ts->disabled && !ts->suspended) |
| 299 | __ad7879_disable(ts); |
| 300 | } |
| 301 | |
Jingoo Han | 02b6a58 | 2014-11-02 00:04:14 -0700 | [diff] [blame] | 302 | static int __maybe_unused ad7879_suspend(struct device *dev) |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 303 | { |
Dmitry Torokhov | 8672bd9 | 2011-11-14 00:32:09 -0800 | [diff] [blame] | 304 | struct ad7879 *ts = dev_get_drvdata(dev); |
| 305 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 306 | mutex_lock(&ts->input->mutex); |
| 307 | |
| 308 | if (!ts->suspended && !ts->disabled && ts->input->users) |
| 309 | __ad7879_disable(ts); |
| 310 | |
| 311 | ts->suspended = true; |
| 312 | |
| 313 | mutex_unlock(&ts->input->mutex); |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 314 | |
Dmitry Torokhov | 8672bd9 | 2011-11-14 00:32:09 -0800 | [diff] [blame] | 315 | return 0; |
| 316 | } |
| 317 | |
Jingoo Han | 02b6a58 | 2014-11-02 00:04:14 -0700 | [diff] [blame] | 318 | static int __maybe_unused ad7879_resume(struct device *dev) |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 319 | { |
Dmitry Torokhov | 8672bd9 | 2011-11-14 00:32:09 -0800 | [diff] [blame] | 320 | struct ad7879 *ts = dev_get_drvdata(dev); |
| 321 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 322 | mutex_lock(&ts->input->mutex); |
| 323 | |
| 324 | if (ts->suspended && !ts->disabled && ts->input->users) |
| 325 | __ad7879_enable(ts); |
| 326 | |
| 327 | ts->suspended = false; |
| 328 | |
| 329 | mutex_unlock(&ts->input->mutex); |
Dmitry Torokhov | 8672bd9 | 2011-11-14 00:32:09 -0800 | [diff] [blame] | 330 | |
| 331 | return 0; |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 332 | } |
Dmitry Torokhov | 8672bd9 | 2011-11-14 00:32:09 -0800 | [diff] [blame] | 333 | |
| 334 | SIMPLE_DEV_PM_OPS(ad7879_pm_ops, ad7879_suspend, ad7879_resume); |
| 335 | EXPORT_SYMBOL(ad7879_pm_ops); |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 336 | |
| 337 | static void ad7879_toggle(struct ad7879 *ts, bool disable) |
| 338 | { |
| 339 | mutex_lock(&ts->input->mutex); |
| 340 | |
| 341 | if (!ts->suspended && ts->input->users != 0) { |
| 342 | |
| 343 | if (disable) { |
| 344 | if (ts->disabled) |
| 345 | __ad7879_enable(ts); |
| 346 | } else { |
| 347 | if (!ts->disabled) |
| 348 | __ad7879_disable(ts); |
| 349 | } |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 350 | } |
| 351 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 352 | ts->disabled = disable; |
| 353 | |
| 354 | mutex_unlock(&ts->input->mutex); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 355 | } |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 356 | |
| 357 | static ssize_t ad7879_disable_show(struct device *dev, |
| 358 | struct device_attribute *attr, char *buf) |
| 359 | { |
| 360 | struct ad7879 *ts = dev_get_drvdata(dev); |
| 361 | |
| 362 | return sprintf(buf, "%u\n", ts->disabled); |
| 363 | } |
| 364 | |
| 365 | static ssize_t ad7879_disable_store(struct device *dev, |
| 366 | struct device_attribute *attr, |
| 367 | const char *buf, size_t count) |
| 368 | { |
| 369 | struct ad7879 *ts = dev_get_drvdata(dev); |
JJ Ding | 76496e7 | 2011-11-09 10:20:14 -0800 | [diff] [blame] | 370 | unsigned int val; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 371 | int error; |
| 372 | |
JJ Ding | 76496e7 | 2011-11-09 10:20:14 -0800 | [diff] [blame] | 373 | error = kstrtouint(buf, 10, &val); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 374 | if (error) |
| 375 | return error; |
| 376 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 377 | ad7879_toggle(ts, val); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 378 | |
| 379 | return count; |
| 380 | } |
| 381 | |
| 382 | static DEVICE_ATTR(disable, 0664, ad7879_disable_show, ad7879_disable_store); |
| 383 | |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 384 | static struct attribute *ad7879_attributes[] = { |
| 385 | &dev_attr_disable.attr, |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 386 | NULL |
| 387 | }; |
| 388 | |
| 389 | static const struct attribute_group ad7879_attr_group = { |
| 390 | .attrs = ad7879_attributes, |
| 391 | }; |
| 392 | |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 393 | #ifdef CONFIG_GPIOLIB |
| 394 | static int ad7879_gpio_direction_input(struct gpio_chip *chip, |
| 395 | unsigned gpio) |
| 396 | { |
Linus Walleij | d9478044 | 2015-12-08 16:35:27 +0100 | [diff] [blame] | 397 | struct ad7879 *ts = gpiochip_get_data(chip); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 398 | int err; |
| 399 | |
| 400 | mutex_lock(&ts->mutex); |
| 401 | ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIODIR | AD7879_GPIOPOL; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 402 | err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 403 | mutex_unlock(&ts->mutex); |
| 404 | |
| 405 | return err; |
| 406 | } |
| 407 | |
| 408 | static int ad7879_gpio_direction_output(struct gpio_chip *chip, |
| 409 | unsigned gpio, int level) |
| 410 | { |
Linus Walleij | d9478044 | 2015-12-08 16:35:27 +0100 | [diff] [blame] | 411 | struct ad7879 *ts = gpiochip_get_data(chip); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 412 | int err; |
| 413 | |
| 414 | mutex_lock(&ts->mutex); |
| 415 | ts->cmd_crtl2 &= ~AD7879_GPIODIR; |
| 416 | ts->cmd_crtl2 |= AD7879_GPIO_EN | AD7879_GPIOPOL; |
| 417 | if (level) |
| 418 | ts->cmd_crtl2 |= AD7879_GPIO_DATA; |
| 419 | else |
| 420 | ts->cmd_crtl2 &= ~AD7879_GPIO_DATA; |
| 421 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 422 | err = ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 423 | mutex_unlock(&ts->mutex); |
| 424 | |
| 425 | return err; |
| 426 | } |
| 427 | |
| 428 | static int ad7879_gpio_get_value(struct gpio_chip *chip, unsigned gpio) |
| 429 | { |
Linus Walleij | d9478044 | 2015-12-08 16:35:27 +0100 | [diff] [blame] | 430 | struct ad7879 *ts = gpiochip_get_data(chip); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 431 | u16 val; |
| 432 | |
| 433 | mutex_lock(&ts->mutex); |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 434 | val = ad7879_read(ts, AD7879_REG_CTRL2); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 435 | mutex_unlock(&ts->mutex); |
| 436 | |
| 437 | return !!(val & AD7879_GPIO_DATA); |
| 438 | } |
| 439 | |
| 440 | static void ad7879_gpio_set_value(struct gpio_chip *chip, |
| 441 | unsigned gpio, int value) |
| 442 | { |
Linus Walleij | d9478044 | 2015-12-08 16:35:27 +0100 | [diff] [blame] | 443 | struct ad7879 *ts = gpiochip_get_data(chip); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 444 | |
| 445 | mutex_lock(&ts->mutex); |
| 446 | if (value) |
| 447 | ts->cmd_crtl2 |= AD7879_GPIO_DATA; |
| 448 | else |
| 449 | ts->cmd_crtl2 &= ~AD7879_GPIO_DATA; |
| 450 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 451 | ad7879_write(ts, AD7879_REG_CTRL2, ts->cmd_crtl2); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 452 | mutex_unlock(&ts->mutex); |
| 453 | } |
| 454 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 455 | static int ad7879_gpio_add(struct ad7879 *ts, |
| 456 | const struct ad7879_platform_data *pdata) |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 457 | { |
Dmitry Torokhov | b621e30 | 2017-02-17 10:45:59 -0800 | [diff] [blame] | 458 | bool gpio_export; |
| 459 | int gpio_base; |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 460 | int ret = 0; |
| 461 | |
Dmitry Torokhov | b621e30 | 2017-02-17 10:45:59 -0800 | [diff] [blame] | 462 | if (pdata) { |
| 463 | gpio_export = pdata->gpio_export; |
| 464 | gpio_base = pdata->gpio_base; |
| 465 | } else { |
| 466 | gpio_export = device_property_read_bool(ts->dev, |
| 467 | "gpio-controller"); |
| 468 | gpio_base = -1; |
| 469 | } |
| 470 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 471 | mutex_init(&ts->mutex); |
| 472 | |
Dmitry Torokhov | b621e30 | 2017-02-17 10:45:59 -0800 | [diff] [blame] | 473 | if (gpio_export) { |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 474 | ts->gc.direction_input = ad7879_gpio_direction_input; |
| 475 | ts->gc.direction_output = ad7879_gpio_direction_output; |
| 476 | ts->gc.get = ad7879_gpio_get_value; |
| 477 | ts->gc.set = ad7879_gpio_set_value; |
| 478 | ts->gc.can_sleep = 1; |
Dmitry Torokhov | b621e30 | 2017-02-17 10:45:59 -0800 | [diff] [blame] | 479 | ts->gc.base = gpio_base; |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 480 | ts->gc.ngpio = 1; |
| 481 | ts->gc.label = "AD7879-GPIO"; |
| 482 | ts->gc.owner = THIS_MODULE; |
Linus Walleij | 58383c78 | 2015-11-04 09:56:26 +0100 | [diff] [blame] | 483 | ts->gc.parent = ts->dev; |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 484 | |
Dmitry Torokhov | 069b2e2c | 2017-02-17 09:29:40 -0800 | [diff] [blame] | 485 | ret = devm_gpiochip_add_data(ts->dev, &ts->gc, ts); |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 486 | if (ret) |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 487 | dev_err(ts->dev, "failed to register gpio %d\n", |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 488 | ts->gc.base); |
| 489 | } |
| 490 | |
| 491 | return ret; |
| 492 | } |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 493 | #else |
Dmitry Torokhov | 069b2e2c | 2017-02-17 09:29:40 -0800 | [diff] [blame] | 494 | static int ad7879_gpio_add(struct ad7879 *ts, |
| 495 | const struct ad7879_platform_data *pdata) |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 496 | { |
| 497 | return 0; |
| 498 | } |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 499 | #endif |
| 500 | |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 501 | static int ad7879_parse_dt(struct device *dev, struct ad7879 *ts) |
| 502 | { |
| 503 | int err; |
| 504 | u32 tmp; |
| 505 | |
| 506 | err = device_property_read_u32(dev, "adi,resistance-plate-x", &tmp); |
| 507 | if (err) { |
| 508 | dev_err(dev, "failed to get resistance-plate-x property\n"); |
| 509 | return err; |
| 510 | } |
| 511 | ts->x_plate_ohms = (u16)tmp; |
| 512 | |
| 513 | device_property_read_u8(dev, "adi,first-conversion-delay", |
| 514 | &ts->first_conversion_delay); |
| 515 | device_property_read_u8(dev, "adi,acquisition-time", |
| 516 | &ts->acquisition_time); |
| 517 | device_property_read_u8(dev, "adi,median-filter-size", &ts->median); |
| 518 | device_property_read_u8(dev, "adi,averaging", &ts->averaging); |
| 519 | device_property_read_u8(dev, "adi,conversion-interval", |
| 520 | &ts->pen_down_acc_interval); |
| 521 | |
| 522 | ts->swap_xy = device_property_read_bool(dev, "touchscreen-swapped-x-y"); |
| 523 | |
| 524 | return 0; |
| 525 | } |
| 526 | |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 527 | int ad7879_probe(struct device *dev, struct regmap *regmap, |
| 528 | int irq, u16 bustype, u8 devid) |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 529 | { |
Jingoo Han | c838cb3 | 2013-12-05 19:21:10 -0800 | [diff] [blame] | 530 | struct ad7879_platform_data *pdata = dev_get_platdata(dev); |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 531 | struct ad7879 *ts; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 532 | struct input_dev *input_dev; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 533 | int err; |
| 534 | u16 revid; |
| 535 | |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 536 | if (irq <= 0) { |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 537 | dev_err(dev, "No IRQ specified\n"); |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 538 | return -EINVAL; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 539 | } |
| 540 | |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 541 | ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL); |
| 542 | if (!ts) |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 543 | return -ENOMEM; |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 544 | |
| 545 | if (pdata) { |
| 546 | /* Platform data use swapped axis (backward compatibility) */ |
| 547 | ts->swap_xy = !pdata->swap_xy; |
| 548 | |
| 549 | ts->x_plate_ohms = pdata->x_plate_ohms ? : 400; |
| 550 | |
| 551 | ts->first_conversion_delay = pdata->first_conversion_delay; |
| 552 | ts->acquisition_time = pdata->acquisition_time; |
| 553 | ts->averaging = pdata->averaging; |
| 554 | ts->pen_down_acc_interval = pdata->pen_down_acc_interval; |
| 555 | ts->median = pdata->median; |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 556 | } else { |
Dmitry Torokhov | 3a97c3d | 2017-02-28 11:50:56 -0800 | [diff] [blame] | 557 | err = ad7879_parse_dt(dev, ts); |
| 558 | if (err) |
| 559 | return err; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 560 | } |
| 561 | |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 562 | input_dev = devm_input_allocate_device(dev); |
| 563 | if (!input_dev) { |
| 564 | dev_err(dev, "Failed to allocate input device\n"); |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 565 | return -ENOMEM; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 566 | } |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 567 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 568 | ts->dev = dev; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 569 | ts->input = input_dev; |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 570 | ts->irq = irq; |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 571 | ts->regmap = regmap; |
Stefan Agner | 5f2940c4a | 2016-03-08 10:34:38 -0800 | [diff] [blame] | 572 | |
Kees Cook | ee03e3f | 2017-10-24 09:44:48 -0700 | [diff] [blame] | 573 | timer_setup(&ts->timer, ad7879_timer, 0); |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 574 | snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(dev)); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 575 | |
| 576 | input_dev->name = "AD7879 Touchscreen"; |
| 577 | input_dev->phys = ts->phys; |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 578 | input_dev->dev.parent = dev; |
Dmitry Torokhov | 404a24c | 2017-02-16 23:22:38 -0800 | [diff] [blame] | 579 | input_dev->id.bustype = bustype; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 580 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 581 | input_dev->open = ad7879_open; |
| 582 | input_dev->close = ad7879_close; |
| 583 | |
| 584 | input_set_drvdata(input_dev, ts); |
| 585 | |
Dmitry Torokhov | 4f95963 | 2017-02-28 11:56:20 -0800 | [diff] [blame] | 586 | input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
Michael Hennerich | 963ce8a | 2010-06-30 14:51:10 -0700 | [diff] [blame] | 587 | |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 588 | if (pdata) { |
| 589 | input_set_abs_params(input_dev, ABS_X, |
| 590 | pdata->x_min ? : 0, |
| 591 | pdata->x_max ? : MAX_12BIT, |
| 592 | 0, 0); |
| 593 | input_set_abs_params(input_dev, ABS_Y, |
| 594 | pdata->y_min ? : 0, |
| 595 | pdata->y_max ? : MAX_12BIT, |
| 596 | 0, 0); |
| 597 | input_set_abs_params(input_dev, ABS_PRESSURE, |
| 598 | pdata->pressure_min, |
| 599 | pdata->pressure_max ? : ~0, |
| 600 | 0, 0); |
| 601 | } else { |
| 602 | input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, 0, 0); |
| 603 | input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, 0, 0); |
Dmitry Torokhov | 4f95963 | 2017-02-28 11:56:20 -0800 | [diff] [blame] | 604 | input_set_capability(input_dev, EV_ABS, ABS_PRESSURE); |
Hans de Goede | ed7c987 | 2016-07-15 14:05:29 -0700 | [diff] [blame] | 605 | touchscreen_parse_properties(input_dev, false, NULL); |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 606 | if (!input_abs_get_max(input_dev, ABS_PRESSURE)) { |
| 607 | dev_err(dev, "Touchscreen pressure is not specified\n"); |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 608 | return -EINVAL; |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 609 | } |
| 610 | } |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 611 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 612 | err = ad7879_write(ts, AD7879_REG_CTRL2, AD7879_RESET); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 613 | if (err < 0) { |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 614 | dev_err(dev, "Failed to write %s\n", input_dev->name); |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 615 | return err; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 616 | } |
| 617 | |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 618 | revid = ad7879_read(ts, AD7879_REG_REVID); |
| 619 | input_dev->id.product = (revid & 0xff); |
| 620 | input_dev->id.version = revid >> 8; |
| 621 | if (input_dev->id.product != devid) { |
| 622 | dev_err(dev, "Failed to probe %s (%x vs %x)\n", |
| 623 | input_dev->name, devid, revid); |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 624 | return -ENODEV; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 625 | } |
| 626 | |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 627 | ts->cmd_crtl3 = AD7879_YPLUS_BIT | |
| 628 | AD7879_XPLUS_BIT | |
| 629 | AD7879_Z2_BIT | |
| 630 | AD7879_Z1_BIT | |
| 631 | AD7879_TEMPMASK_BIT | |
| 632 | AD7879_AUXVBATMASK_BIT | |
| 633 | AD7879_GPIOALERTMASK_BIT; |
| 634 | |
| 635 | ts->cmd_crtl2 = AD7879_PM(AD7879_PM_DYN) | AD7879_DFR | |
| 636 | AD7879_AVG(ts->averaging) | |
| 637 | AD7879_MFS(ts->median) | |
| 638 | AD7879_FCD(ts->first_conversion_delay); |
| 639 | |
| 640 | ts->cmd_crtl1 = AD7879_MODE_INT | AD7879_MODE_SEQ1 | |
| 641 | AD7879_ACQ(ts->acquisition_time) | |
| 642 | AD7879_TMR(ts->pen_down_acc_interval); |
| 643 | |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 644 | err = devm_request_threaded_irq(dev, ts->irq, NULL, ad7879_irq, |
| 645 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
| 646 | dev_name(dev), ts); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 647 | if (err) { |
Stefan Agner | fa6e3ca | 2016-03-08 10:35:24 -0800 | [diff] [blame] | 648 | dev_err(dev, "Failed to request IRQ: %d\n", err); |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 649 | return err; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 650 | } |
| 651 | |
Dmitry Torokhov | 14fbbc3 | 2010-06-30 14:50:51 -0700 | [diff] [blame] | 652 | __ad7879_disable(ts); |
| 653 | |
Andi Shyti | a8b4aa0 | 2017-09-29 16:47:53 -0700 | [diff] [blame] | 654 | err = devm_device_add_group(dev, &ad7879_attr_group); |
Dmitry Torokhov | 069b2e2c | 2017-02-17 09:29:40 -0800 | [diff] [blame] | 655 | if (err) |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 656 | return err; |
Dmitry Torokhov | 069b2e2c | 2017-02-17 09:29:40 -0800 | [diff] [blame] | 657 | |
| 658 | err = ad7879_gpio_add(ts, pdata); |
| 659 | if (err) |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 660 | return err; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 661 | |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 662 | err = input_register_device(input_dev); |
| 663 | if (err) |
Dmitry Torokhov | 4e34025 | 2017-02-28 11:43:52 -0800 | [diff] [blame] | 664 | return err; |
Michael Hennerich | ec51b7f | 2010-01-19 00:27:58 -0800 | [diff] [blame] | 665 | |
Dmitry Torokhov | af160c54 | 2017-02-28 13:57:21 -0800 | [diff] [blame] | 666 | dev_set_drvdata(dev, ts); |
| 667 | |
Dmitry Torokhov | 069b2e2c | 2017-02-17 09:29:40 -0800 | [diff] [blame] | 668 | return 0; |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 669 | } |
Mike Frysinger | 4397c98 | 2010-06-30 01:40:52 -0700 | [diff] [blame] | 670 | EXPORT_SYMBOL(ad7879_probe); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 671 | |
Michael Hennerich | 2581e5d | 2017-02-22 10:34:20 -0800 | [diff] [blame] | 672 | MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>"); |
Michael Hennerich | b4be468 | 2009-03-09 20:12:52 -0700 | [diff] [blame] | 673 | MODULE_DESCRIPTION("AD7879(-1) touchscreen Driver"); |
| 674 | MODULE_LICENSE("GPL"); |