Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Touchscreen driver for WM831x PMICs |
| 3 | * |
| 4 | * Copyright 2011 Wolfson Microelectronics plc. |
| 5 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> |
| 6 | * |
| 7 | * This program is free software; you can redistribute it and/or modify it |
| 8 | * under the terms of the GNU General Public License as published by the |
| 9 | * Free Software Foundation; either version 2 of the License, or (at your |
| 10 | * option) any later version. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/module.h> |
| 14 | #include <linux/moduleparam.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
| 17 | #include <linux/string.h> |
| 18 | #include <linux/pm.h> |
| 19 | #include <linux/input.h> |
| 20 | #include <linux/interrupt.h> |
| 21 | #include <linux/io.h> |
| 22 | #include <linux/mfd/wm831x/core.h> |
| 23 | #include <linux/mfd/wm831x/irq.h> |
| 24 | #include <linux/mfd/wm831x/pdata.h> |
| 25 | #include <linux/platform_device.h> |
| 26 | #include <linux/slab.h> |
| 27 | #include <linux/types.h> |
| 28 | |
| 29 | /* |
| 30 | * R16424 (0x4028) - Touch Control 1 |
| 31 | */ |
| 32 | #define WM831X_TCH_ENA 0x8000 /* TCH_ENA */ |
| 33 | #define WM831X_TCH_CVT_ENA 0x4000 /* TCH_CVT_ENA */ |
| 34 | #define WM831X_TCH_SLPENA 0x1000 /* TCH_SLPENA */ |
| 35 | #define WM831X_TCH_Z_ENA 0x0400 /* TCH_Z_ENA */ |
| 36 | #define WM831X_TCH_Y_ENA 0x0200 /* TCH_Y_ENA */ |
| 37 | #define WM831X_TCH_X_ENA 0x0100 /* TCH_X_ENA */ |
| 38 | #define WM831X_TCH_DELAY_MASK 0x00E0 /* TCH_DELAY - [7:5] */ |
| 39 | #define WM831X_TCH_DELAY_SHIFT 5 /* TCH_DELAY - [7:5] */ |
| 40 | #define WM831X_TCH_DELAY_WIDTH 3 /* TCH_DELAY - [7:5] */ |
| 41 | #define WM831X_TCH_RATE_MASK 0x001F /* TCH_RATE - [4:0] */ |
| 42 | #define WM831X_TCH_RATE_SHIFT 0 /* TCH_RATE - [4:0] */ |
| 43 | #define WM831X_TCH_RATE_WIDTH 5 /* TCH_RATE - [4:0] */ |
| 44 | |
| 45 | /* |
| 46 | * R16425 (0x4029) - Touch Control 2 |
| 47 | */ |
| 48 | #define WM831X_TCH_PD_WK 0x2000 /* TCH_PD_WK */ |
| 49 | #define WM831X_TCH_5WIRE 0x1000 /* TCH_5WIRE */ |
| 50 | #define WM831X_TCH_PDONLY 0x0800 /* TCH_PDONLY */ |
| 51 | #define WM831X_TCH_ISEL 0x0100 /* TCH_ISEL */ |
| 52 | #define WM831X_TCH_RPU_MASK 0x000F /* TCH_RPU - [3:0] */ |
| 53 | #define WM831X_TCH_RPU_SHIFT 0 /* TCH_RPU - [3:0] */ |
| 54 | #define WM831X_TCH_RPU_WIDTH 4 /* TCH_RPU - [3:0] */ |
| 55 | |
| 56 | /* |
| 57 | * R16426-8 (0x402A-C) - Touch Data X/Y/X |
| 58 | */ |
| 59 | #define WM831X_TCH_PD 0x8000 /* TCH_PD1 */ |
| 60 | #define WM831X_TCH_DATA_MASK 0x0FFF /* TCH_DATA - [11:0] */ |
| 61 | #define WM831X_TCH_DATA_SHIFT 0 /* TCH_DATA - [11:0] */ |
| 62 | #define WM831X_TCH_DATA_WIDTH 12 /* TCH_DATA - [11:0] */ |
| 63 | |
| 64 | struct wm831x_ts { |
| 65 | struct input_dev *input_dev; |
| 66 | struct wm831x *wm831x; |
| 67 | unsigned int data_irq; |
| 68 | unsigned int pd_irq; |
| 69 | bool pressure; |
| 70 | bool pen_down; |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 71 | struct work_struct pd_data_work; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 72 | }; |
| 73 | |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 74 | static void wm831x_pd_data_work(struct work_struct *work) |
| 75 | { |
| 76 | struct wm831x_ts *wm831x_ts = |
| 77 | container_of(work, struct wm831x_ts, pd_data_work); |
| 78 | |
| 79 | if (wm831x_ts->pen_down) { |
| 80 | enable_irq(wm831x_ts->data_irq); |
| 81 | dev_dbg(wm831x_ts->wm831x->dev, "IRQ PD->DATA done\n"); |
| 82 | } else { |
| 83 | enable_irq(wm831x_ts->pd_irq); |
| 84 | dev_dbg(wm831x_ts->wm831x->dev, "IRQ DATA->PD done\n"); |
| 85 | } |
| 86 | } |
| 87 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 88 | static irqreturn_t wm831x_ts_data_irq(int irq, void *irq_data) |
| 89 | { |
| 90 | struct wm831x_ts *wm831x_ts = irq_data; |
| 91 | struct wm831x *wm831x = wm831x_ts->wm831x; |
| 92 | static int data_types[] = { ABS_X, ABS_Y, ABS_PRESSURE }; |
| 93 | u16 data[3]; |
Mark Brown | 723d928 | 2011-01-31 21:09:25 -0800 | [diff] [blame] | 94 | int count; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 95 | int i, ret; |
| 96 | |
Mark Brown | 723d928 | 2011-01-31 21:09:25 -0800 | [diff] [blame] | 97 | if (wm831x_ts->pressure) |
| 98 | count = 3; |
| 99 | else |
| 100 | count = 2; |
| 101 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 102 | wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1, |
| 103 | WM831X_TCHDATA_EINT, WM831X_TCHDATA_EINT); |
| 104 | |
| 105 | ret = wm831x_bulk_read(wm831x, WM831X_TOUCH_DATA_X, count, |
| 106 | data); |
| 107 | if (ret != 0) { |
| 108 | dev_err(wm831x->dev, "Failed to read touch data: %d\n", |
| 109 | ret); |
| 110 | return IRQ_NONE; |
| 111 | } |
| 112 | |
| 113 | /* |
| 114 | * We get a pen down reading on every reading, report pen up if any |
| 115 | * individual reading does so. |
| 116 | */ |
| 117 | wm831x_ts->pen_down = true; |
| 118 | for (i = 0; i < count; i++) { |
| 119 | if (!(data[i] & WM831X_TCH_PD)) { |
| 120 | wm831x_ts->pen_down = false; |
| 121 | continue; |
| 122 | } |
| 123 | input_report_abs(wm831x_ts->input_dev, data_types[i], |
| 124 | data[i] & WM831X_TCH_DATA_MASK); |
| 125 | } |
| 126 | |
| 127 | if (!wm831x_ts->pen_down) { |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 128 | /* Switch from data to pen down */ |
| 129 | dev_dbg(wm831x->dev, "IRQ DATA->PD\n"); |
| 130 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 131 | disable_irq_nosync(wm831x_ts->data_irq); |
| 132 | |
| 133 | /* Don't need data any more */ |
| 134 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1, |
| 135 | WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | |
| 136 | WM831X_TCH_Z_ENA, 0); |
| 137 | |
| 138 | /* Flush any final samples that arrived while reading */ |
| 139 | wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1, |
| 140 | WM831X_TCHDATA_EINT, WM831X_TCHDATA_EINT); |
| 141 | |
| 142 | wm831x_bulk_read(wm831x, WM831X_TOUCH_DATA_X, count, data); |
| 143 | |
| 144 | if (wm831x_ts->pressure) |
| 145 | input_report_abs(wm831x_ts->input_dev, |
| 146 | ABS_PRESSURE, 0); |
| 147 | |
| 148 | input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 0); |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 149 | |
| 150 | schedule_work(&wm831x_ts->pd_data_work); |
Mark Brown | bf28370 | 2011-04-27 23:09:26 -0700 | [diff] [blame] | 151 | } else { |
| 152 | input_report_key(wm831x_ts->input_dev, BTN_TOUCH, 1); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 153 | } |
| 154 | |
| 155 | input_sync(wm831x_ts->input_dev); |
| 156 | |
| 157 | return IRQ_HANDLED; |
| 158 | } |
| 159 | |
| 160 | static irqreturn_t wm831x_ts_pen_down_irq(int irq, void *irq_data) |
| 161 | { |
| 162 | struct wm831x_ts *wm831x_ts = irq_data; |
| 163 | struct wm831x *wm831x = wm831x_ts->wm831x; |
Mark Brown | 723d928 | 2011-01-31 21:09:25 -0800 | [diff] [blame] | 164 | int ena = 0; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 165 | |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 166 | if (wm831x_ts->pen_down) |
| 167 | return IRQ_HANDLED; |
| 168 | |
| 169 | disable_irq_nosync(wm831x_ts->pd_irq); |
| 170 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 171 | /* Start collecting data */ |
Mark Brown | 723d928 | 2011-01-31 21:09:25 -0800 | [diff] [blame] | 172 | if (wm831x_ts->pressure) |
| 173 | ena |= WM831X_TCH_Z_ENA; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 174 | |
| 175 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1, |
| 176 | WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | WM831X_TCH_Z_ENA, |
| 177 | WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | ena); |
| 178 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 179 | wm831x_set_bits(wm831x, WM831X_INTERRUPT_STATUS_1, |
| 180 | WM831X_TCHPD_EINT, WM831X_TCHPD_EINT); |
| 181 | |
| 182 | wm831x_ts->pen_down = true; |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 183 | |
| 184 | /* Switch from pen down to data */ |
| 185 | dev_dbg(wm831x->dev, "IRQ PD->DATA\n"); |
| 186 | schedule_work(&wm831x_ts->pd_data_work); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 187 | |
| 188 | return IRQ_HANDLED; |
| 189 | } |
| 190 | |
| 191 | static int wm831x_ts_input_open(struct input_dev *idev) |
| 192 | { |
| 193 | struct wm831x_ts *wm831x_ts = input_get_drvdata(idev); |
| 194 | struct wm831x *wm831x = wm831x_ts->wm831x; |
| 195 | |
| 196 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1, |
Mark Brown | e7cbb90 | 2011-03-14 21:39:09 -0700 | [diff] [blame] | 197 | WM831X_TCH_ENA | WM831X_TCH_CVT_ENA | |
| 198 | WM831X_TCH_X_ENA | WM831X_TCH_Y_ENA | |
| 199 | WM831X_TCH_Z_ENA, WM831X_TCH_ENA); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 200 | |
| 201 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1, |
| 202 | WM831X_TCH_CVT_ENA, WM831X_TCH_CVT_ENA); |
| 203 | |
| 204 | return 0; |
| 205 | } |
| 206 | |
| 207 | static void wm831x_ts_input_close(struct input_dev *idev) |
| 208 | { |
| 209 | struct wm831x_ts *wm831x_ts = input_get_drvdata(idev); |
| 210 | struct wm831x *wm831x = wm831x_ts->wm831x; |
| 211 | |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 212 | /* Shut the controller down, disabling all other functionality too */ |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 213 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1, |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 214 | WM831X_TCH_ENA | WM831X_TCH_X_ENA | |
| 215 | WM831X_TCH_Y_ENA | WM831X_TCH_Z_ENA, 0); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 216 | |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 217 | /* Make sure any pending IRQs are done, the above will prevent |
| 218 | * new ones firing. |
| 219 | */ |
| 220 | synchronize_irq(wm831x_ts->data_irq); |
| 221 | synchronize_irq(wm831x_ts->pd_irq); |
| 222 | |
| 223 | /* Make sure the IRQ completion work is quiesced */ |
Tejun Heo | 4382973 | 2012-08-20 14:51:24 -0700 | [diff] [blame] | 224 | flush_work(&wm831x_ts->pd_data_work); |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 225 | |
| 226 | /* If we ended up with the pen down then make sure we revert back |
| 227 | * to pen detection state for the next time we start up. |
| 228 | */ |
| 229 | if (wm831x_ts->pen_down) { |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 230 | disable_irq(wm831x_ts->data_irq); |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 231 | enable_irq(wm831x_ts->pd_irq); |
| 232 | wm831x_ts->pen_down = false; |
| 233 | } |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 234 | } |
| 235 | |
| 236 | static __devinit int wm831x_ts_probe(struct platform_device *pdev) |
| 237 | { |
| 238 | struct wm831x_ts *wm831x_ts; |
| 239 | struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); |
| 240 | struct wm831x_pdata *core_pdata = dev_get_platdata(pdev->dev.parent); |
Mark Brown | 723d928 | 2011-01-31 21:09:25 -0800 | [diff] [blame] | 241 | struct wm831x_touch_pdata *pdata = NULL; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 242 | struct input_dev *input_dev; |
Mark Brown | acad985 | 2011-04-27 23:08:51 -0700 | [diff] [blame] | 243 | int error, irqf; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 244 | |
Mark Brown | 723d928 | 2011-01-31 21:09:25 -0800 | [diff] [blame] | 245 | if (core_pdata) |
| 246 | pdata = core_pdata->touch; |
| 247 | |
Mark Brown | ef8dee5 | 2012-10-11 00:42:34 -0700 | [diff] [blame] | 248 | wm831x_ts = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_ts), |
| 249 | GFP_KERNEL); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 250 | input_dev = input_allocate_device(); |
| 251 | if (!wm831x_ts || !input_dev) { |
| 252 | error = -ENOMEM; |
| 253 | goto err_alloc; |
| 254 | } |
| 255 | |
| 256 | wm831x_ts->wm831x = wm831x; |
| 257 | wm831x_ts->input_dev = input_dev; |
Mark Brown | f534666 | 2011-04-27 23:08:34 -0700 | [diff] [blame] | 258 | INIT_WORK(&wm831x_ts->pd_data_work, wm831x_pd_data_work); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 259 | |
| 260 | /* |
| 261 | * If we have a direct IRQ use it, otherwise use the interrupt |
| 262 | * from the WM831x IRQ controller. |
| 263 | */ |
Mark Brown | cd99758 | 2012-05-14 23:14:24 +0200 | [diff] [blame] | 264 | wm831x_ts->data_irq = wm831x_irq(wm831x, |
| 265 | platform_get_irq_byname(pdev, |
| 266 | "TCHDATA")); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 267 | if (pdata && pdata->data_irq) |
| 268 | wm831x_ts->data_irq = pdata->data_irq; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 269 | |
Mark Brown | cd99758 | 2012-05-14 23:14:24 +0200 | [diff] [blame] | 270 | wm831x_ts->pd_irq = wm831x_irq(wm831x, |
| 271 | platform_get_irq_byname(pdev, "TCHPD")); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 272 | if (pdata && pdata->pd_irq) |
| 273 | wm831x_ts->pd_irq = pdata->pd_irq; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 274 | |
Mark Brown | 23c483d | 2011-03-12 20:48:34 -0800 | [diff] [blame] | 275 | if (pdata) |
| 276 | wm831x_ts->pressure = pdata->pressure; |
| 277 | else |
| 278 | wm831x_ts->pressure = true; |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 279 | |
| 280 | /* Five wire touchscreens can't report pressure */ |
| 281 | if (pdata && pdata->fivewire) { |
| 282 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2, |
| 283 | WM831X_TCH_5WIRE, WM831X_TCH_5WIRE); |
| 284 | |
| 285 | /* Pressure measurements are not possible for five wire mode */ |
| 286 | WARN_ON(pdata->pressure && pdata->fivewire); |
| 287 | wm831x_ts->pressure = false; |
| 288 | } else { |
| 289 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2, |
| 290 | WM831X_TCH_5WIRE, 0); |
| 291 | } |
| 292 | |
| 293 | if (pdata) { |
| 294 | switch (pdata->isel) { |
| 295 | default: |
| 296 | dev_err(&pdev->dev, "Unsupported ISEL setting: %d\n", |
| 297 | pdata->isel); |
| 298 | /* Fall through */ |
| 299 | case 200: |
| 300 | case 0: |
| 301 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2, |
| 302 | WM831X_TCH_ISEL, 0); |
| 303 | break; |
| 304 | case 400: |
| 305 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2, |
| 306 | WM831X_TCH_ISEL, WM831X_TCH_ISEL); |
| 307 | break; |
| 308 | } |
| 309 | } |
| 310 | |
| 311 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_2, |
| 312 | WM831X_TCH_PDONLY, 0); |
| 313 | |
| 314 | /* Default to 96 samples/sec */ |
| 315 | wm831x_set_bits(wm831x, WM831X_TOUCH_CONTROL_1, |
| 316 | WM831X_TCH_RATE_MASK, 6); |
| 317 | |
Mark Brown | acad985 | 2011-04-27 23:08:51 -0700 | [diff] [blame] | 318 | if (pdata && pdata->data_irqf) |
| 319 | irqf = pdata->data_irqf; |
| 320 | else |
| 321 | irqf = IRQF_TRIGGER_HIGH; |
| 322 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 323 | error = request_threaded_irq(wm831x_ts->data_irq, |
| 324 | NULL, wm831x_ts_data_irq, |
Mark Brown | acad985 | 2011-04-27 23:08:51 -0700 | [diff] [blame] | 325 | irqf | IRQF_ONESHOT, |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 326 | "Touchscreen data", wm831x_ts); |
| 327 | if (error) { |
| 328 | dev_err(&pdev->dev, "Failed to request data IRQ %d: %d\n", |
| 329 | wm831x_ts->data_irq, error); |
| 330 | goto err_alloc; |
| 331 | } |
| 332 | disable_irq(wm831x_ts->data_irq); |
| 333 | |
Mark Brown | acad985 | 2011-04-27 23:08:51 -0700 | [diff] [blame] | 334 | if (pdata && pdata->pd_irqf) |
| 335 | irqf = pdata->pd_irqf; |
| 336 | else |
| 337 | irqf = IRQF_TRIGGER_HIGH; |
| 338 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 339 | error = request_threaded_irq(wm831x_ts->pd_irq, |
| 340 | NULL, wm831x_ts_pen_down_irq, |
Mark Brown | acad985 | 2011-04-27 23:08:51 -0700 | [diff] [blame] | 341 | irqf | IRQF_ONESHOT, |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 342 | "Touchscreen pen down", wm831x_ts); |
| 343 | if (error) { |
| 344 | dev_err(&pdev->dev, "Failed to request pen down IRQ %d: %d\n", |
| 345 | wm831x_ts->pd_irq, error); |
| 346 | goto err_data_irq; |
| 347 | } |
| 348 | |
| 349 | /* set up touch configuration */ |
| 350 | input_dev->name = "WM831x touchscreen"; |
| 351 | input_dev->phys = "wm831x"; |
| 352 | input_dev->open = wm831x_ts_input_open; |
| 353 | input_dev->close = wm831x_ts_input_close; |
| 354 | |
| 355 | __set_bit(EV_ABS, input_dev->evbit); |
| 356 | __set_bit(EV_KEY, input_dev->evbit); |
| 357 | __set_bit(BTN_TOUCH, input_dev->keybit); |
| 358 | |
| 359 | input_set_abs_params(input_dev, ABS_X, 0, 4095, 5, 0); |
| 360 | input_set_abs_params(input_dev, ABS_Y, 0, 4095, 5, 0); |
| 361 | if (wm831x_ts->pressure) |
| 362 | input_set_abs_params(input_dev, ABS_PRESSURE, 0, 4095, 5, 0); |
| 363 | |
| 364 | input_set_drvdata(input_dev, wm831x_ts); |
| 365 | input_dev->dev.parent = &pdev->dev; |
| 366 | |
| 367 | error = input_register_device(input_dev); |
| 368 | if (error) |
| 369 | goto err_pd_irq; |
| 370 | |
| 371 | platform_set_drvdata(pdev, wm831x_ts); |
| 372 | return 0; |
| 373 | |
| 374 | err_pd_irq: |
| 375 | free_irq(wm831x_ts->pd_irq, wm831x_ts); |
| 376 | err_data_irq: |
| 377 | free_irq(wm831x_ts->data_irq, wm831x_ts); |
| 378 | err_alloc: |
| 379 | input_free_device(input_dev); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 380 | |
| 381 | return error; |
| 382 | } |
| 383 | |
| 384 | static __devexit int wm831x_ts_remove(struct platform_device *pdev) |
| 385 | { |
| 386 | struct wm831x_ts *wm831x_ts = platform_get_drvdata(pdev); |
| 387 | |
| 388 | free_irq(wm831x_ts->pd_irq, wm831x_ts); |
| 389 | free_irq(wm831x_ts->data_irq, wm831x_ts); |
| 390 | input_unregister_device(wm831x_ts->input_dev); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 391 | |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 392 | return 0; |
| 393 | } |
| 394 | |
| 395 | static struct platform_driver wm831x_ts_driver = { |
| 396 | .driver = { |
| 397 | .name = "wm831x-touch", |
| 398 | .owner = THIS_MODULE, |
| 399 | }, |
| 400 | .probe = wm831x_ts_probe, |
| 401 | .remove = __devexit_p(wm831x_ts_remove), |
| 402 | }; |
JJ Ding | cdcc96e | 2011-11-29 11:14:13 -0800 | [diff] [blame] | 403 | module_platform_driver(wm831x_ts_driver); |
Mark Brown | 00cfa73 | 2011-01-30 12:31:30 -0800 | [diff] [blame] | 404 | |
| 405 | /* Module information */ |
| 406 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |
| 407 | MODULE_DESCRIPTION("WM831x PMIC touchscreen driver"); |
| 408 | MODULE_LICENSE("GPL"); |
| 409 | MODULE_ALIAS("platform:wm831x-touch"); |