Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) ST-Ericsson SA 2010 |
| 3 | * |
| 4 | * Author: Jayeeta Banerjee <jayeeta.banerjee@stericsson.com> |
| 5 | * Author: Sundar Iyer <sundar.iyer@stericsson.com> |
| 6 | * |
| 7 | * License Terms: GNU General Public License, version 2 |
| 8 | * |
| 9 | * TC35893 MFD Keypad Controller driver |
| 10 | */ |
| 11 | |
| 12 | #include <linux/module.h> |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 13 | #include <linux/interrupt.h> |
| 14 | #include <linux/input.h> |
| 15 | #include <linux/platform_device.h> |
| 16 | #include <linux/input/matrix_keypad.h> |
| 17 | #include <linux/i2c.h> |
| 18 | #include <linux/slab.h> |
| 19 | #include <linux/mfd/tc3589x.h> |
| 20 | |
| 21 | /* Maximum supported keypad matrix row/columns size */ |
| 22 | #define TC3589x_MAX_KPROW 8 |
| 23 | #define TC3589x_MAX_KPCOL 12 |
| 24 | |
| 25 | /* keypad related Constants */ |
| 26 | #define TC3589x_MAX_DEBOUNCE_SETTLE 0xFF |
| 27 | #define DEDICATED_KEY_VAL 0xFF |
| 28 | |
| 29 | /* Pull up/down masks */ |
| 30 | #define TC3589x_NO_PULL_MASK 0x0 |
| 31 | #define TC3589x_PULL_DOWN_MASK 0x1 |
| 32 | #define TC3589x_PULL_UP_MASK 0x2 |
| 33 | #define TC3589x_PULLUP_ALL_MASK 0xAA |
| 34 | #define TC3589x_IO_PULL_VAL(index, mask) ((mask)<<((index)%4)*2)) |
| 35 | |
| 36 | /* Bit masks for IOCFG register */ |
| 37 | #define IOCFG_BALLCFG 0x01 |
| 38 | #define IOCFG_IG 0x08 |
| 39 | |
| 40 | #define KP_EVCODE_COL_MASK 0x0F |
| 41 | #define KP_EVCODE_ROW_MASK 0x70 |
| 42 | #define KP_RELEASE_EVT_MASK 0x80 |
| 43 | |
| 44 | #define KP_ROW_SHIFT 4 |
| 45 | |
| 46 | #define KP_NO_VALID_KEY_MASK 0x7F |
| 47 | |
| 48 | /* bit masks for RESTCTRL register */ |
| 49 | #define TC3589x_KBDRST 0x2 |
| 50 | #define TC3589x_IRQRST 0x10 |
| 51 | #define TC3589x_RESET_ALL 0x1B |
| 52 | |
| 53 | /* KBDMFS register bit mask */ |
| 54 | #define TC3589x_KBDMFS_EN 0x1 |
| 55 | |
| 56 | /* CLKEN register bitmask */ |
| 57 | #define KPD_CLK_EN 0x1 |
| 58 | |
| 59 | /* RSTINTCLR register bit mask */ |
| 60 | #define IRQ_CLEAR 0x1 |
| 61 | |
| 62 | /* bit masks for keyboard interrupts*/ |
| 63 | #define TC3589x_EVT_LOSS_INT 0x8 |
| 64 | #define TC3589x_EVT_INT 0x4 |
| 65 | #define TC3589x_KBD_LOSS_INT 0x2 |
| 66 | #define TC3589x_KBD_INT 0x1 |
| 67 | |
| 68 | /* bit masks for keyboard interrupt clear*/ |
| 69 | #define TC3589x_EVT_INT_CLR 0x2 |
| 70 | #define TC3589x_KBD_INT_CLR 0x1 |
| 71 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 72 | /** |
| 73 | * struct tc_keypad - data structure used by keypad driver |
Naga Radhesh | dab78d7 | 2012-01-04 22:19:14 -0800 | [diff] [blame] | 74 | * @tc3589x: pointer to tc35893 |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 75 | * @input: pointer to input device object |
| 76 | * @board: keypad platform device |
| 77 | * @krow: number of rows |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 78 | * @kcol: number of columns |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 79 | * @keymap: matrix scan code table for keycodes |
Naga Radhesh | dab78d7 | 2012-01-04 22:19:14 -0800 | [diff] [blame] | 80 | * @keypad_stopped: holds keypad status |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 81 | */ |
| 82 | struct tc_keypad { |
| 83 | struct tc3589x *tc3589x; |
| 84 | struct input_dev *input; |
| 85 | const struct tc3589x_keypad_platform_data *board; |
| 86 | unsigned int krow; |
| 87 | unsigned int kcol; |
Rabin Vincent | 3973501 | 2013-03-09 16:17:20 -0800 | [diff] [blame] | 88 | unsigned short *keymap; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 89 | bool keypad_stopped; |
| 90 | }; |
| 91 | |
Harvey Yang | 9299c08 | 2011-09-08 09:46:55 -0700 | [diff] [blame] | 92 | static int tc3589x_keypad_init_key_hardware(struct tc_keypad *keypad) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 93 | { |
| 94 | int ret; |
| 95 | struct tc3589x *tc3589x = keypad->tc3589x; |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 96 | const struct tc3589x_keypad_platform_data *board = keypad->board; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 97 | |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 98 | /* validate platform configuration */ |
| 99 | if (board->kcol > TC3589x_MAX_KPCOL || board->krow > TC3589x_MAX_KPROW) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 100 | return -EINVAL; |
| 101 | |
| 102 | /* configure KBDSIZE 4 LSbits for cols and 4 MSbits for rows */ |
| 103 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSIZE, |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 104 | (board->krow << KP_ROW_SHIFT) | board->kcol); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 105 | if (ret < 0) |
| 106 | return ret; |
| 107 | |
| 108 | /* configure dedicated key config, no dedicated key selected */ |
| 109 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_LSB, DEDICATED_KEY_VAL); |
| 110 | if (ret < 0) |
| 111 | return ret; |
| 112 | |
| 113 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_MSB, DEDICATED_KEY_VAL); |
| 114 | if (ret < 0) |
| 115 | return ret; |
| 116 | |
| 117 | /* Configure settle time */ |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 118 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSETTLE_REG, |
| 119 | board->settle_time); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 120 | if (ret < 0) |
| 121 | return ret; |
| 122 | |
| 123 | /* Configure debounce time */ |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 124 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBDBOUNCE, |
| 125 | board->debounce_period); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 126 | if (ret < 0) |
| 127 | return ret; |
| 128 | |
| 129 | /* Start of initialise keypad GPIOs */ |
| 130 | ret = tc3589x_set_bits(tc3589x, TC3589x_IOCFG, 0x0, IOCFG_IG); |
| 131 | if (ret < 0) |
| 132 | return ret; |
| 133 | |
| 134 | /* Configure pull-up resistors for all row GPIOs */ |
| 135 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_LSB, |
| 136 | TC3589x_PULLUP_ALL_MASK); |
| 137 | if (ret < 0) |
| 138 | return ret; |
| 139 | |
| 140 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_MSB, |
| 141 | TC3589x_PULLUP_ALL_MASK); |
| 142 | if (ret < 0) |
| 143 | return ret; |
| 144 | |
| 145 | /* Configure pull-up resistors for all column GPIOs */ |
| 146 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_LSB, |
| 147 | TC3589x_PULLUP_ALL_MASK); |
| 148 | if (ret < 0) |
| 149 | return ret; |
| 150 | |
| 151 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_MSB, |
| 152 | TC3589x_PULLUP_ALL_MASK); |
| 153 | if (ret < 0) |
| 154 | return ret; |
| 155 | |
| 156 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG2_LSB, |
| 157 | TC3589x_PULLUP_ALL_MASK); |
| 158 | |
| 159 | return ret; |
| 160 | } |
| 161 | |
| 162 | #define TC35893_DATA_REGS 4 |
| 163 | #define TC35893_KEYCODE_FIFO_EMPTY 0x7f |
| 164 | #define TC35893_KEYCODE_FIFO_CLEAR 0xff |
| 165 | #define TC35893_KEYPAD_ROW_SHIFT 0x3 |
| 166 | |
| 167 | static irqreturn_t tc3589x_keypad_irq(int irq, void *dev) |
| 168 | { |
| 169 | struct tc_keypad *keypad = dev; |
| 170 | struct tc3589x *tc3589x = keypad->tc3589x; |
| 171 | u8 i, row_index, col_index, kbd_code, up; |
| 172 | u8 code; |
| 173 | |
| 174 | for (i = 0; i < TC35893_DATA_REGS * 2; i++) { |
| 175 | kbd_code = tc3589x_reg_read(tc3589x, TC3589x_EVTCODE_FIFO); |
| 176 | |
| 177 | /* loop till fifo is empty and no more keys are pressed */ |
| 178 | if (kbd_code == TC35893_KEYCODE_FIFO_EMPTY || |
| 179 | kbd_code == TC35893_KEYCODE_FIFO_CLEAR) |
| 180 | continue; |
| 181 | |
| 182 | /* valid key is found */ |
| 183 | col_index = kbd_code & KP_EVCODE_COL_MASK; |
| 184 | row_index = (kbd_code & KP_EVCODE_ROW_MASK) >> KP_ROW_SHIFT; |
| 185 | code = MATRIX_SCAN_CODE(row_index, col_index, |
| 186 | TC35893_KEYPAD_ROW_SHIFT); |
| 187 | up = kbd_code & KP_RELEASE_EVT_MASK; |
| 188 | |
| 189 | input_event(keypad->input, EV_MSC, MSC_SCAN, code); |
| 190 | input_report_key(keypad->input, keypad->keymap[code], !up); |
| 191 | input_sync(keypad->input); |
| 192 | } |
| 193 | |
| 194 | /* clear IRQ */ |
| 195 | tc3589x_set_bits(tc3589x, TC3589x_KBDIC, |
| 196 | 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); |
| 197 | /* enable IRQ */ |
| 198 | tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, |
| 199 | 0x0, TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); |
| 200 | |
| 201 | return IRQ_HANDLED; |
| 202 | } |
| 203 | |
| 204 | static int tc3589x_keypad_enable(struct tc_keypad *keypad) |
| 205 | { |
| 206 | struct tc3589x *tc3589x = keypad->tc3589x; |
| 207 | int ret; |
| 208 | |
| 209 | /* pull the keypad module out of reset */ |
| 210 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x0); |
| 211 | if (ret < 0) |
| 212 | return ret; |
| 213 | |
| 214 | /* configure KBDMFS */ |
| 215 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMFS, 0x0, TC3589x_KBDMFS_EN); |
| 216 | if (ret < 0) |
| 217 | return ret; |
| 218 | |
| 219 | /* enable the keypad clock */ |
| 220 | ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x0, KPD_CLK_EN); |
| 221 | if (ret < 0) |
| 222 | return ret; |
| 223 | |
| 224 | /* clear pending IRQs */ |
| 225 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTINTCLR, 0x0, 0x1); |
| 226 | if (ret < 0) |
| 227 | return ret; |
| 228 | |
| 229 | /* enable the IRQs */ |
| 230 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, 0x0, |
| 231 | TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); |
| 232 | if (ret < 0) |
| 233 | return ret; |
| 234 | |
| 235 | keypad->keypad_stopped = false; |
| 236 | |
| 237 | return ret; |
| 238 | } |
| 239 | |
| 240 | static int tc3589x_keypad_disable(struct tc_keypad *keypad) |
| 241 | { |
| 242 | struct tc3589x *tc3589x = keypad->tc3589x; |
| 243 | int ret; |
| 244 | |
| 245 | /* clear IRQ */ |
| 246 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDIC, |
| 247 | 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); |
| 248 | if (ret < 0) |
| 249 | return ret; |
| 250 | |
| 251 | /* disable all interrupts */ |
| 252 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, |
| 253 | ~(TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT), 0x0); |
| 254 | if (ret < 0) |
| 255 | return ret; |
| 256 | |
| 257 | /* disable the keypad module */ |
| 258 | ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x1, 0x0); |
| 259 | if (ret < 0) |
| 260 | return ret; |
| 261 | |
| 262 | /* put the keypad module into reset */ |
| 263 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x1); |
| 264 | |
| 265 | keypad->keypad_stopped = true; |
| 266 | |
| 267 | return ret; |
| 268 | } |
| 269 | |
| 270 | static int tc3589x_keypad_open(struct input_dev *input) |
| 271 | { |
| 272 | int error; |
| 273 | struct tc_keypad *keypad = input_get_drvdata(input); |
| 274 | |
| 275 | /* enable the keypad module */ |
| 276 | error = tc3589x_keypad_enable(keypad); |
| 277 | if (error < 0) { |
| 278 | dev_err(&input->dev, "failed to enable keypad module\n"); |
| 279 | return error; |
| 280 | } |
| 281 | |
| 282 | error = tc3589x_keypad_init_key_hardware(keypad); |
| 283 | if (error < 0) { |
| 284 | dev_err(&input->dev, "failed to configure keypad module\n"); |
| 285 | return error; |
| 286 | } |
| 287 | |
| 288 | return 0; |
| 289 | } |
| 290 | |
| 291 | static void tc3589x_keypad_close(struct input_dev *input) |
| 292 | { |
| 293 | struct tc_keypad *keypad = input_get_drvdata(input); |
| 294 | |
| 295 | /* disable the keypad module */ |
| 296 | tc3589x_keypad_disable(keypad); |
| 297 | } |
| 298 | |
Linus Walleij | 7beebcb | 2014-04-20 12:34:34 -0700 | [diff] [blame] | 299 | #ifdef CONFIG_OF |
| 300 | static const struct tc3589x_keypad_platform_data * |
| 301 | tc3589x_keypad_of_probe(struct device *dev) |
| 302 | { |
| 303 | struct device_node *np = dev->of_node; |
| 304 | struct tc3589x_keypad_platform_data *plat; |
| 305 | u32 cols, rows; |
| 306 | u32 debounce_ms; |
| 307 | int proplen; |
| 308 | |
| 309 | if (!np) |
| 310 | return ERR_PTR(-ENODEV); |
| 311 | |
| 312 | plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL); |
| 313 | if (!plat) |
| 314 | return ERR_PTR(-ENOMEM); |
| 315 | |
| 316 | of_property_read_u32(np, "keypad,num-columns", &cols); |
| 317 | of_property_read_u32(np, "keypad,num-rows", &rows); |
| 318 | plat->kcol = (u8) cols; |
| 319 | plat->krow = (u8) rows; |
| 320 | if (!plat->krow || !plat->kcol || |
| 321 | plat->krow > TC_KPD_ROWS || plat->kcol > TC_KPD_COLUMNS) { |
| 322 | dev_err(dev, |
| 323 | "keypad columns/rows not properly specified (%ux%u)\n", |
| 324 | plat->kcol, plat->krow); |
| 325 | return ERR_PTR(-EINVAL); |
| 326 | } |
| 327 | |
| 328 | if (!of_get_property(np, "linux,keymap", &proplen)) { |
| 329 | dev_err(dev, "property linux,keymap not found\n"); |
| 330 | return ERR_PTR(-ENOENT); |
| 331 | } |
| 332 | |
| 333 | plat->no_autorepeat = of_property_read_bool(np, "linux,no-autorepeat"); |
| 334 | plat->enable_wakeup = of_property_read_bool(np, "linux,wakeup"); |
| 335 | |
| 336 | /* The custom delay format is ms/16 */ |
| 337 | of_property_read_u32(np, "debounce-delay-ms", &debounce_ms); |
| 338 | if (debounce_ms) |
| 339 | plat->debounce_period = debounce_ms * 16; |
| 340 | else |
| 341 | plat->debounce_period = TC_KPD_DEBOUNCE_PERIOD; |
| 342 | |
| 343 | plat->settle_time = TC_KPD_SETTLE_TIME; |
| 344 | /* FIXME: should be property of the IRQ resource? */ |
| 345 | plat->irqtype = IRQF_TRIGGER_FALLING; |
| 346 | |
| 347 | return plat; |
| 348 | } |
| 349 | #else |
| 350 | static inline const struct tc3589x_keypad_platform_data * |
| 351 | tc3589x_keypad_of_probe(struct device *dev) |
| 352 | { |
| 353 | return ERR_PTR(-ENODEV); |
| 354 | } |
| 355 | #endif |
| 356 | |
| 357 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 358 | static int tc3589x_keypad_probe(struct platform_device *pdev) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 359 | { |
| 360 | struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); |
| 361 | struct tc_keypad *keypad; |
| 362 | struct input_dev *input; |
| 363 | const struct tc3589x_keypad_platform_data *plat; |
| 364 | int error, irq; |
| 365 | |
| 366 | plat = tc3589x->pdata->keypad; |
| 367 | if (!plat) { |
Linus Walleij | 7beebcb | 2014-04-20 12:34:34 -0700 | [diff] [blame] | 368 | plat = tc3589x_keypad_of_probe(&pdev->dev); |
| 369 | if (IS_ERR(plat)) { |
| 370 | dev_err(&pdev->dev, "invalid keypad platform data\n"); |
| 371 | return PTR_ERR(plat); |
| 372 | } |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | irq = platform_get_irq(pdev, 0); |
| 376 | if (irq < 0) |
| 377 | return irq; |
| 378 | |
| 379 | keypad = kzalloc(sizeof(struct tc_keypad), GFP_KERNEL); |
| 380 | input = input_allocate_device(); |
| 381 | if (!keypad || !input) { |
| 382 | dev_err(&pdev->dev, "failed to allocate keypad memory\n"); |
| 383 | error = -ENOMEM; |
| 384 | goto err_free_mem; |
| 385 | } |
| 386 | |
| 387 | keypad->board = plat; |
| 388 | keypad->input = input; |
| 389 | keypad->tc3589x = tc3589x; |
| 390 | |
| 391 | input->id.bustype = BUS_I2C; |
| 392 | input->name = pdev->name; |
| 393 | input->dev.parent = &pdev->dev; |
| 394 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 395 | input->open = tc3589x_keypad_open; |
| 396 | input->close = tc3589x_keypad_close; |
| 397 | |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 398 | error = matrix_keypad_build_keymap(plat->keymap_data, NULL, |
| 399 | TC3589x_MAX_KPROW, TC3589x_MAX_KPCOL, |
Rabin Vincent | 3973501 | 2013-03-09 16:17:20 -0800 | [diff] [blame] | 400 | NULL, input); |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 401 | if (error) { |
| 402 | dev_err(&pdev->dev, "Failed to build keymap\n"); |
| 403 | goto err_free_mem; |
| 404 | } |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 405 | |
Rabin Vincent | 3973501 | 2013-03-09 16:17:20 -0800 | [diff] [blame] | 406 | keypad->keymap = input->keycode; |
| 407 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 408 | input_set_capability(input, EV_MSC, MSC_SCAN); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 409 | if (!plat->no_autorepeat) |
| 410 | __set_bit(EV_REP, input->evbit); |
| 411 | |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 412 | input_set_drvdata(input, keypad); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 413 | |
| 414 | error = request_threaded_irq(irq, NULL, |
| 415 | tc3589x_keypad_irq, plat->irqtype, |
| 416 | "tc3589x-keypad", keypad); |
| 417 | if (error < 0) { |
| 418 | dev_err(&pdev->dev, |
| 419 | "Could not allocate irq %d,error %d\n", |
| 420 | irq, error); |
| 421 | goto err_free_mem; |
| 422 | } |
| 423 | |
| 424 | error = input_register_device(input); |
| 425 | if (error) { |
| 426 | dev_err(&pdev->dev, "Could not register input device\n"); |
| 427 | goto err_free_irq; |
| 428 | } |
| 429 | |
| 430 | /* let platform decide if keypad is a wakeup source or not */ |
| 431 | device_init_wakeup(&pdev->dev, plat->enable_wakeup); |
| 432 | device_set_wakeup_capable(&pdev->dev, plat->enable_wakeup); |
| 433 | |
| 434 | platform_set_drvdata(pdev, keypad); |
| 435 | |
| 436 | return 0; |
| 437 | |
| 438 | err_free_irq: |
| 439 | free_irq(irq, keypad); |
| 440 | err_free_mem: |
| 441 | input_free_device(input); |
| 442 | kfree(keypad); |
| 443 | return error; |
| 444 | } |
| 445 | |
Bill Pemberton | e2619cf | 2012-11-23 21:50:47 -0800 | [diff] [blame] | 446 | static int tc3589x_keypad_remove(struct platform_device *pdev) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 447 | { |
| 448 | struct tc_keypad *keypad = platform_get_drvdata(pdev); |
| 449 | int irq = platform_get_irq(pdev, 0); |
| 450 | |
| 451 | if (!keypad->keypad_stopped) |
| 452 | tc3589x_keypad_disable(keypad); |
| 453 | |
| 454 | free_irq(irq, keypad); |
| 455 | |
| 456 | input_unregister_device(keypad->input); |
| 457 | |
| 458 | kfree(keypad); |
| 459 | |
| 460 | return 0; |
| 461 | } |
| 462 | |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 463 | #ifdef CONFIG_PM_SLEEP |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 464 | static int tc3589x_keypad_suspend(struct device *dev) |
| 465 | { |
| 466 | struct platform_device *pdev = to_platform_device(dev); |
| 467 | struct tc_keypad *keypad = platform_get_drvdata(pdev); |
| 468 | int irq = platform_get_irq(pdev, 0); |
| 469 | |
| 470 | /* keypad is already off; we do nothing */ |
| 471 | if (keypad->keypad_stopped) |
| 472 | return 0; |
| 473 | |
| 474 | /* if device is not a wakeup source, disable it for powersave */ |
| 475 | if (!device_may_wakeup(&pdev->dev)) |
| 476 | tc3589x_keypad_disable(keypad); |
| 477 | else |
| 478 | enable_irq_wake(irq); |
| 479 | |
| 480 | return 0; |
| 481 | } |
| 482 | |
| 483 | static int tc3589x_keypad_resume(struct device *dev) |
| 484 | { |
| 485 | struct platform_device *pdev = to_platform_device(dev); |
| 486 | struct tc_keypad *keypad = platform_get_drvdata(pdev); |
| 487 | int irq = platform_get_irq(pdev, 0); |
| 488 | |
| 489 | if (!keypad->keypad_stopped) |
| 490 | return 0; |
| 491 | |
| 492 | /* enable the device to resume normal operations */ |
| 493 | if (!device_may_wakeup(&pdev->dev)) |
| 494 | tc3589x_keypad_enable(keypad); |
| 495 | else |
| 496 | disable_irq_wake(irq); |
| 497 | |
| 498 | return 0; |
| 499 | } |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 500 | #endif |
| 501 | |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 502 | static SIMPLE_DEV_PM_OPS(tc3589x_keypad_dev_pm_ops, |
| 503 | tc3589x_keypad_suspend, tc3589x_keypad_resume); |
| 504 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 505 | static struct platform_driver tc3589x_keypad_driver = { |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 506 | .driver = { |
| 507 | .name = "tc3589x-keypad", |
| 508 | .owner = THIS_MODULE, |
| 509 | .pm = &tc3589x_keypad_dev_pm_ops, |
| 510 | }, |
| 511 | .probe = tc3589x_keypad_probe, |
Bill Pemberton | 1cb0aa8 | 2012-11-23 21:27:39 -0800 | [diff] [blame] | 512 | .remove = tc3589x_keypad_remove, |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 513 | }; |
JJ Ding | 5146c84 | 2011-11-29 11:08:39 -0800 | [diff] [blame] | 514 | module_platform_driver(tc3589x_keypad_driver); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 515 | |
| 516 | MODULE_LICENSE("GPL v2"); |
| 517 | MODULE_AUTHOR("Jayeeta Banerjee/Sundar Iyer"); |
| 518 | MODULE_DESCRIPTION("TC35893 Keypad Driver"); |
Dan Carpenter | aa58abc | 2011-01-07 20:47:37 +0100 | [diff] [blame] | 519 | MODULE_ALIAS("platform:tc3589x-keypad"); |