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> |
Himangi Saraogi | be97217 | 2014-05-25 22:33:13 -0700 | [diff] [blame] | 20 | #include <linux/device.h> |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 21 | |
| 22 | /* Maximum supported keypad matrix row/columns size */ |
| 23 | #define TC3589x_MAX_KPROW 8 |
| 24 | #define TC3589x_MAX_KPCOL 12 |
| 25 | |
| 26 | /* keypad related Constants */ |
| 27 | #define TC3589x_MAX_DEBOUNCE_SETTLE 0xFF |
| 28 | #define DEDICATED_KEY_VAL 0xFF |
| 29 | |
| 30 | /* Pull up/down masks */ |
| 31 | #define TC3589x_NO_PULL_MASK 0x0 |
| 32 | #define TC3589x_PULL_DOWN_MASK 0x1 |
| 33 | #define TC3589x_PULL_UP_MASK 0x2 |
| 34 | #define TC3589x_PULLUP_ALL_MASK 0xAA |
| 35 | #define TC3589x_IO_PULL_VAL(index, mask) ((mask)<<((index)%4)*2)) |
| 36 | |
| 37 | /* Bit masks for IOCFG register */ |
| 38 | #define IOCFG_BALLCFG 0x01 |
| 39 | #define IOCFG_IG 0x08 |
| 40 | |
| 41 | #define KP_EVCODE_COL_MASK 0x0F |
| 42 | #define KP_EVCODE_ROW_MASK 0x70 |
| 43 | #define KP_RELEASE_EVT_MASK 0x80 |
| 44 | |
| 45 | #define KP_ROW_SHIFT 4 |
| 46 | |
| 47 | #define KP_NO_VALID_KEY_MASK 0x7F |
| 48 | |
| 49 | /* bit masks for RESTCTRL register */ |
| 50 | #define TC3589x_KBDRST 0x2 |
| 51 | #define TC3589x_IRQRST 0x10 |
| 52 | #define TC3589x_RESET_ALL 0x1B |
| 53 | |
| 54 | /* KBDMFS register bit mask */ |
| 55 | #define TC3589x_KBDMFS_EN 0x1 |
| 56 | |
| 57 | /* CLKEN register bitmask */ |
| 58 | #define KPD_CLK_EN 0x1 |
| 59 | |
| 60 | /* RSTINTCLR register bit mask */ |
| 61 | #define IRQ_CLEAR 0x1 |
| 62 | |
| 63 | /* bit masks for keyboard interrupts*/ |
| 64 | #define TC3589x_EVT_LOSS_INT 0x8 |
| 65 | #define TC3589x_EVT_INT 0x4 |
| 66 | #define TC3589x_KBD_LOSS_INT 0x2 |
| 67 | #define TC3589x_KBD_INT 0x1 |
| 68 | |
| 69 | /* bit masks for keyboard interrupt clear*/ |
| 70 | #define TC3589x_EVT_INT_CLR 0x2 |
| 71 | #define TC3589x_KBD_INT_CLR 0x1 |
| 72 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 73 | /** |
Linus Walleij | 8b6f53c | 2015-03-27 09:28:16 -0700 | [diff] [blame] | 74 | * struct tc35893_keypad_platform_data - platform specific keypad data |
| 75 | * @keymap_data: matrix scan code table for keycodes |
| 76 | * @krow: mask for available rows, value is 0xFF |
| 77 | * @kcol: mask for available columns, value is 0xFF |
| 78 | * @debounce_period: platform specific debounce time |
| 79 | * @settle_time: platform specific settle down time |
| 80 | * @irqtype: type of interrupt, falling or rising edge |
| 81 | * @enable_wakeup: specifies if keypad event can wake up system from sleep |
| 82 | * @no_autorepeat: flag for auto repetition |
| 83 | */ |
| 84 | struct tc3589x_keypad_platform_data { |
| 85 | const struct matrix_keymap_data *keymap_data; |
| 86 | u8 krow; |
| 87 | u8 kcol; |
| 88 | u8 debounce_period; |
| 89 | u8 settle_time; |
| 90 | unsigned long irqtype; |
| 91 | bool enable_wakeup; |
| 92 | bool no_autorepeat; |
| 93 | }; |
| 94 | |
| 95 | /** |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 96 | * struct tc_keypad - data structure used by keypad driver |
Naga Radhesh | dab78d7 | 2012-01-04 22:19:14 -0800 | [diff] [blame] | 97 | * @tc3589x: pointer to tc35893 |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 98 | * @input: pointer to input device object |
| 99 | * @board: keypad platform device |
| 100 | * @krow: number of rows |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 101 | * @kcol: number of columns |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 102 | * @keymap: matrix scan code table for keycodes |
Naga Radhesh | dab78d7 | 2012-01-04 22:19:14 -0800 | [diff] [blame] | 103 | * @keypad_stopped: holds keypad status |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 104 | */ |
| 105 | struct tc_keypad { |
| 106 | struct tc3589x *tc3589x; |
| 107 | struct input_dev *input; |
| 108 | const struct tc3589x_keypad_platform_data *board; |
| 109 | unsigned int krow; |
| 110 | unsigned int kcol; |
Rabin Vincent | 3973501 | 2013-03-09 16:17:20 -0800 | [diff] [blame] | 111 | unsigned short *keymap; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 112 | bool keypad_stopped; |
| 113 | }; |
| 114 | |
Harvey Yang | 9299c08 | 2011-09-08 09:46:55 -0700 | [diff] [blame] | 115 | static int tc3589x_keypad_init_key_hardware(struct tc_keypad *keypad) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 116 | { |
| 117 | int ret; |
| 118 | struct tc3589x *tc3589x = keypad->tc3589x; |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 119 | const struct tc3589x_keypad_platform_data *board = keypad->board; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 120 | |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 121 | /* validate platform configuration */ |
| 122 | if (board->kcol > TC3589x_MAX_KPCOL || board->krow > TC3589x_MAX_KPROW) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 123 | return -EINVAL; |
| 124 | |
| 125 | /* configure KBDSIZE 4 LSbits for cols and 4 MSbits for rows */ |
| 126 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSIZE, |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 127 | (board->krow << KP_ROW_SHIFT) | board->kcol); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 128 | if (ret < 0) |
| 129 | return ret; |
| 130 | |
| 131 | /* configure dedicated key config, no dedicated key selected */ |
| 132 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_LSB, DEDICATED_KEY_VAL); |
| 133 | if (ret < 0) |
| 134 | return ret; |
| 135 | |
| 136 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBCFG_MSB, DEDICATED_KEY_VAL); |
| 137 | if (ret < 0) |
| 138 | return ret; |
| 139 | |
| 140 | /* Configure settle time */ |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 141 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBDSETTLE_REG, |
| 142 | board->settle_time); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 143 | if (ret < 0) |
| 144 | return ret; |
| 145 | |
| 146 | /* Configure debounce time */ |
Dmitry Torokhov | 71f3d07 | 2012-04-20 22:33:09 -0700 | [diff] [blame] | 147 | ret = tc3589x_reg_write(tc3589x, TC3589x_KBDBOUNCE, |
| 148 | board->debounce_period); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 149 | if (ret < 0) |
| 150 | return ret; |
| 151 | |
| 152 | /* Start of initialise keypad GPIOs */ |
| 153 | ret = tc3589x_set_bits(tc3589x, TC3589x_IOCFG, 0x0, IOCFG_IG); |
| 154 | if (ret < 0) |
| 155 | return ret; |
| 156 | |
| 157 | /* Configure pull-up resistors for all row GPIOs */ |
| 158 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_LSB, |
| 159 | TC3589x_PULLUP_ALL_MASK); |
| 160 | if (ret < 0) |
| 161 | return ret; |
| 162 | |
| 163 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG0_MSB, |
| 164 | TC3589x_PULLUP_ALL_MASK); |
| 165 | if (ret < 0) |
| 166 | return ret; |
| 167 | |
| 168 | /* Configure pull-up resistors for all column GPIOs */ |
| 169 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_LSB, |
| 170 | TC3589x_PULLUP_ALL_MASK); |
| 171 | if (ret < 0) |
| 172 | return ret; |
| 173 | |
| 174 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG1_MSB, |
| 175 | TC3589x_PULLUP_ALL_MASK); |
| 176 | if (ret < 0) |
| 177 | return ret; |
| 178 | |
| 179 | ret = tc3589x_reg_write(tc3589x, TC3589x_IOPULLCFG2_LSB, |
| 180 | TC3589x_PULLUP_ALL_MASK); |
| 181 | |
| 182 | return ret; |
| 183 | } |
| 184 | |
| 185 | #define TC35893_DATA_REGS 4 |
| 186 | #define TC35893_KEYCODE_FIFO_EMPTY 0x7f |
| 187 | #define TC35893_KEYCODE_FIFO_CLEAR 0xff |
| 188 | #define TC35893_KEYPAD_ROW_SHIFT 0x3 |
| 189 | |
| 190 | static irqreturn_t tc3589x_keypad_irq(int irq, void *dev) |
| 191 | { |
| 192 | struct tc_keypad *keypad = dev; |
| 193 | struct tc3589x *tc3589x = keypad->tc3589x; |
| 194 | u8 i, row_index, col_index, kbd_code, up; |
| 195 | u8 code; |
| 196 | |
| 197 | for (i = 0; i < TC35893_DATA_REGS * 2; i++) { |
| 198 | kbd_code = tc3589x_reg_read(tc3589x, TC3589x_EVTCODE_FIFO); |
| 199 | |
| 200 | /* loop till fifo is empty and no more keys are pressed */ |
| 201 | if (kbd_code == TC35893_KEYCODE_FIFO_EMPTY || |
| 202 | kbd_code == TC35893_KEYCODE_FIFO_CLEAR) |
| 203 | continue; |
| 204 | |
| 205 | /* valid key is found */ |
| 206 | col_index = kbd_code & KP_EVCODE_COL_MASK; |
| 207 | row_index = (kbd_code & KP_EVCODE_ROW_MASK) >> KP_ROW_SHIFT; |
| 208 | code = MATRIX_SCAN_CODE(row_index, col_index, |
| 209 | TC35893_KEYPAD_ROW_SHIFT); |
| 210 | up = kbd_code & KP_RELEASE_EVT_MASK; |
| 211 | |
| 212 | input_event(keypad->input, EV_MSC, MSC_SCAN, code); |
| 213 | input_report_key(keypad->input, keypad->keymap[code], !up); |
| 214 | input_sync(keypad->input); |
| 215 | } |
| 216 | |
| 217 | /* clear IRQ */ |
| 218 | tc3589x_set_bits(tc3589x, TC3589x_KBDIC, |
| 219 | 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); |
| 220 | /* enable IRQ */ |
| 221 | tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, |
| 222 | 0x0, TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); |
| 223 | |
| 224 | return IRQ_HANDLED; |
| 225 | } |
| 226 | |
| 227 | static int tc3589x_keypad_enable(struct tc_keypad *keypad) |
| 228 | { |
| 229 | struct tc3589x *tc3589x = keypad->tc3589x; |
| 230 | int ret; |
| 231 | |
| 232 | /* pull the keypad module out of reset */ |
| 233 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x0); |
| 234 | if (ret < 0) |
| 235 | return ret; |
| 236 | |
| 237 | /* configure KBDMFS */ |
| 238 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMFS, 0x0, TC3589x_KBDMFS_EN); |
| 239 | if (ret < 0) |
| 240 | return ret; |
| 241 | |
| 242 | /* enable the keypad clock */ |
| 243 | ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x0, KPD_CLK_EN); |
| 244 | if (ret < 0) |
| 245 | return ret; |
| 246 | |
| 247 | /* clear pending IRQs */ |
| 248 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTINTCLR, 0x0, 0x1); |
| 249 | if (ret < 0) |
| 250 | return ret; |
| 251 | |
| 252 | /* enable the IRQs */ |
| 253 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, 0x0, |
| 254 | TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT); |
| 255 | if (ret < 0) |
| 256 | return ret; |
| 257 | |
| 258 | keypad->keypad_stopped = false; |
| 259 | |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | static int tc3589x_keypad_disable(struct tc_keypad *keypad) |
| 264 | { |
| 265 | struct tc3589x *tc3589x = keypad->tc3589x; |
| 266 | int ret; |
| 267 | |
| 268 | /* clear IRQ */ |
| 269 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDIC, |
| 270 | 0x0, TC3589x_EVT_INT_CLR | TC3589x_KBD_INT_CLR); |
| 271 | if (ret < 0) |
| 272 | return ret; |
| 273 | |
| 274 | /* disable all interrupts */ |
| 275 | ret = tc3589x_set_bits(tc3589x, TC3589x_KBDMSK, |
| 276 | ~(TC3589x_EVT_LOSS_INT | TC3589x_EVT_INT), 0x0); |
| 277 | if (ret < 0) |
| 278 | return ret; |
| 279 | |
| 280 | /* disable the keypad module */ |
| 281 | ret = tc3589x_set_bits(tc3589x, TC3589x_CLKEN, 0x1, 0x0); |
| 282 | if (ret < 0) |
| 283 | return ret; |
| 284 | |
| 285 | /* put the keypad module into reset */ |
| 286 | ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_KBDRST, 0x1); |
| 287 | |
| 288 | keypad->keypad_stopped = true; |
| 289 | |
| 290 | return ret; |
| 291 | } |
| 292 | |
| 293 | static int tc3589x_keypad_open(struct input_dev *input) |
| 294 | { |
| 295 | int error; |
| 296 | struct tc_keypad *keypad = input_get_drvdata(input); |
| 297 | |
| 298 | /* enable the keypad module */ |
| 299 | error = tc3589x_keypad_enable(keypad); |
| 300 | if (error < 0) { |
| 301 | dev_err(&input->dev, "failed to enable keypad module\n"); |
| 302 | return error; |
| 303 | } |
| 304 | |
| 305 | error = tc3589x_keypad_init_key_hardware(keypad); |
| 306 | if (error < 0) { |
| 307 | dev_err(&input->dev, "failed to configure keypad module\n"); |
| 308 | return error; |
| 309 | } |
| 310 | |
| 311 | return 0; |
| 312 | } |
| 313 | |
| 314 | static void tc3589x_keypad_close(struct input_dev *input) |
| 315 | { |
| 316 | struct tc_keypad *keypad = input_get_drvdata(input); |
| 317 | |
| 318 | /* disable the keypad module */ |
| 319 | tc3589x_keypad_disable(keypad); |
| 320 | } |
| 321 | |
Linus Walleij | 7beebcb | 2014-04-20 12:34:34 -0700 | [diff] [blame] | 322 | static const struct tc3589x_keypad_platform_data * |
| 323 | tc3589x_keypad_of_probe(struct device *dev) |
| 324 | { |
| 325 | struct device_node *np = dev->of_node; |
| 326 | struct tc3589x_keypad_platform_data *plat; |
| 327 | u32 cols, rows; |
| 328 | u32 debounce_ms; |
| 329 | int proplen; |
| 330 | |
| 331 | if (!np) |
| 332 | return ERR_PTR(-ENODEV); |
| 333 | |
| 334 | plat = devm_kzalloc(dev, sizeof(*plat), GFP_KERNEL); |
| 335 | if (!plat) |
| 336 | return ERR_PTR(-ENOMEM); |
| 337 | |
| 338 | of_property_read_u32(np, "keypad,num-columns", &cols); |
| 339 | of_property_read_u32(np, "keypad,num-rows", &rows); |
| 340 | plat->kcol = (u8) cols; |
| 341 | plat->krow = (u8) rows; |
| 342 | if (!plat->krow || !plat->kcol || |
| 343 | plat->krow > TC_KPD_ROWS || plat->kcol > TC_KPD_COLUMNS) { |
| 344 | dev_err(dev, |
| 345 | "keypad columns/rows not properly specified (%ux%u)\n", |
| 346 | plat->kcol, plat->krow); |
| 347 | return ERR_PTR(-EINVAL); |
| 348 | } |
| 349 | |
| 350 | if (!of_get_property(np, "linux,keymap", &proplen)) { |
| 351 | dev_err(dev, "property linux,keymap not found\n"); |
| 352 | return ERR_PTR(-ENOENT); |
| 353 | } |
| 354 | |
| 355 | plat->no_autorepeat = of_property_read_bool(np, "linux,no-autorepeat"); |
Dmitry Torokhov | e571c73 | 2015-07-17 17:08:02 -0700 | [diff] [blame] | 356 | |
| 357 | plat->enable_wakeup = of_property_read_bool(np, "wakeup-source") || |
| 358 | /* legacy name */ |
| 359 | of_property_read_bool(np, "linux,wakeup"); |
Linus Walleij | 7beebcb | 2014-04-20 12:34:34 -0700 | [diff] [blame] | 360 | |
| 361 | /* The custom delay format is ms/16 */ |
| 362 | of_property_read_u32(np, "debounce-delay-ms", &debounce_ms); |
| 363 | if (debounce_ms) |
| 364 | plat->debounce_period = debounce_ms * 16; |
| 365 | else |
| 366 | plat->debounce_period = TC_KPD_DEBOUNCE_PERIOD; |
| 367 | |
| 368 | plat->settle_time = TC_KPD_SETTLE_TIME; |
| 369 | /* FIXME: should be property of the IRQ resource? */ |
| 370 | plat->irqtype = IRQF_TRIGGER_FALLING; |
| 371 | |
| 372 | return plat; |
| 373 | } |
Linus Walleij | 7beebcb | 2014-04-20 12:34:34 -0700 | [diff] [blame] | 374 | |
Bill Pemberton | 5298cc4 | 2012-11-23 21:38:25 -0800 | [diff] [blame] | 375 | static int tc3589x_keypad_probe(struct platform_device *pdev) |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 376 | { |
| 377 | struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); |
| 378 | struct tc_keypad *keypad; |
| 379 | struct input_dev *input; |
| 380 | const struct tc3589x_keypad_platform_data *plat; |
| 381 | int error, irq; |
| 382 | |
Linus Walleij | 8b6f53c | 2015-03-27 09:28:16 -0700 | [diff] [blame] | 383 | plat = tc3589x_keypad_of_probe(&pdev->dev); |
| 384 | if (IS_ERR(plat)) { |
| 385 | dev_err(&pdev->dev, "invalid keypad platform data\n"); |
| 386 | return PTR_ERR(plat); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | irq = platform_get_irq(pdev, 0); |
| 390 | if (irq < 0) |
| 391 | return irq; |
| 392 | |
Himangi Saraogi | be97217 | 2014-05-25 22:33:13 -0700 | [diff] [blame] | 393 | keypad = devm_kzalloc(&pdev->dev, sizeof(struct tc_keypad), |
| 394 | GFP_KERNEL); |
| 395 | if (!keypad) |
| 396 | return -ENOMEM; |
| 397 | |
| 398 | input = devm_input_allocate_device(&pdev->dev); |
| 399 | if (!input) { |
| 400 | dev_err(&pdev->dev, "failed to allocate input device\n"); |
| 401 | return -ENOMEM; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | keypad->board = plat; |
| 405 | keypad->input = input; |
| 406 | keypad->tc3589x = tc3589x; |
| 407 | |
| 408 | input->id.bustype = BUS_I2C; |
| 409 | input->name = pdev->name; |
| 410 | input->dev.parent = &pdev->dev; |
| 411 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 412 | input->open = tc3589x_keypad_open; |
| 413 | input->close = tc3589x_keypad_close; |
| 414 | |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 415 | error = matrix_keypad_build_keymap(plat->keymap_data, NULL, |
| 416 | TC3589x_MAX_KPROW, TC3589x_MAX_KPCOL, |
Rabin Vincent | 3973501 | 2013-03-09 16:17:20 -0800 | [diff] [blame] | 417 | NULL, input); |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 418 | if (error) { |
| 419 | dev_err(&pdev->dev, "Failed to build keymap\n"); |
Himangi Saraogi | be97217 | 2014-05-25 22:33:13 -0700 | [diff] [blame] | 420 | return error; |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 421 | } |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 422 | |
Rabin Vincent | 3973501 | 2013-03-09 16:17:20 -0800 | [diff] [blame] | 423 | keypad->keymap = input->keycode; |
| 424 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 425 | input_set_capability(input, EV_MSC, MSC_SCAN); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 426 | if (!plat->no_autorepeat) |
| 427 | __set_bit(EV_REP, input->evbit); |
| 428 | |
Dmitry Torokhov | 1932811 | 2012-05-10 22:37:08 -0700 | [diff] [blame] | 429 | input_set_drvdata(input, keypad); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 430 | |
Himangi Saraogi | be97217 | 2014-05-25 22:33:13 -0700 | [diff] [blame] | 431 | tc3589x_keypad_disable(keypad); |
| 432 | |
| 433 | error = devm_request_threaded_irq(&pdev->dev, irq, |
| 434 | NULL, tc3589x_keypad_irq, |
| 435 | plat->irqtype | IRQF_ONESHOT, |
| 436 | "tc3589x-keypad", keypad); |
| 437 | if (error) { |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 438 | dev_err(&pdev->dev, |
| 439 | "Could not allocate irq %d,error %d\n", |
| 440 | irq, error); |
Himangi Saraogi | be97217 | 2014-05-25 22:33:13 -0700 | [diff] [blame] | 441 | return error; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | error = input_register_device(input); |
| 445 | if (error) { |
| 446 | dev_err(&pdev->dev, "Could not register input device\n"); |
Himangi Saraogi | be97217 | 2014-05-25 22:33:13 -0700 | [diff] [blame] | 447 | return error; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | /* let platform decide if keypad is a wakeup source or not */ |
| 451 | device_init_wakeup(&pdev->dev, plat->enable_wakeup); |
| 452 | device_set_wakeup_capable(&pdev->dev, plat->enable_wakeup); |
| 453 | |
| 454 | platform_set_drvdata(pdev, keypad); |
| 455 | |
| 456 | return 0; |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 457 | } |
| 458 | |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 459 | #ifdef CONFIG_PM_SLEEP |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 460 | static int tc3589x_keypad_suspend(struct device *dev) |
| 461 | { |
| 462 | struct platform_device *pdev = to_platform_device(dev); |
| 463 | struct tc_keypad *keypad = platform_get_drvdata(pdev); |
| 464 | int irq = platform_get_irq(pdev, 0); |
| 465 | |
| 466 | /* keypad is already off; we do nothing */ |
| 467 | if (keypad->keypad_stopped) |
| 468 | return 0; |
| 469 | |
| 470 | /* if device is not a wakeup source, disable it for powersave */ |
| 471 | if (!device_may_wakeup(&pdev->dev)) |
| 472 | tc3589x_keypad_disable(keypad); |
| 473 | else |
| 474 | enable_irq_wake(irq); |
| 475 | |
| 476 | return 0; |
| 477 | } |
| 478 | |
| 479 | static int tc3589x_keypad_resume(struct device *dev) |
| 480 | { |
| 481 | struct platform_device *pdev = to_platform_device(dev); |
| 482 | struct tc_keypad *keypad = platform_get_drvdata(pdev); |
| 483 | int irq = platform_get_irq(pdev, 0); |
| 484 | |
| 485 | if (!keypad->keypad_stopped) |
| 486 | return 0; |
| 487 | |
| 488 | /* enable the device to resume normal operations */ |
| 489 | if (!device_may_wakeup(&pdev->dev)) |
| 490 | tc3589x_keypad_enable(keypad); |
| 491 | else |
| 492 | disable_irq_wake(irq); |
| 493 | |
| 494 | return 0; |
| 495 | } |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 496 | #endif |
| 497 | |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 498 | static SIMPLE_DEV_PM_OPS(tc3589x_keypad_dev_pm_ops, |
| 499 | tc3589x_keypad_suspend, tc3589x_keypad_resume); |
| 500 | |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 501 | static struct platform_driver tc3589x_keypad_driver = { |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 502 | .driver = { |
| 503 | .name = "tc3589x-keypad", |
Dmitry Torokhov | 53a2b81 | 2011-03-15 23:18:00 -0700 | [diff] [blame] | 504 | .pm = &tc3589x_keypad_dev_pm_ops, |
| 505 | }, |
| 506 | .probe = tc3589x_keypad_probe, |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 507 | }; |
JJ Ding | 5146c84 | 2011-11-29 11:08:39 -0800 | [diff] [blame] | 508 | module_platform_driver(tc3589x_keypad_driver); |
Sundar Iyer | 09c730a | 2010-12-21 15:53:31 +0530 | [diff] [blame] | 509 | |
| 510 | MODULE_LICENSE("GPL v2"); |
| 511 | MODULE_AUTHOR("Jayeeta Banerjee/Sundar Iyer"); |
| 512 | MODULE_DESCRIPTION("TC35893 Keypad Driver"); |
Dan Carpenter | aa58abc | 2011-01-07 20:47:37 +0100 | [diff] [blame] | 513 | MODULE_ALIAS("platform:tc3589x-keypad"); |