Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1 | /* |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 2 | * ST Microelectronics MFD: stmpe's driver |
| 3 | * |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 4 | * Copyright (C) ST-Ericsson SA 2010 |
| 5 | * |
| 6 | * License Terms: GNU General Public License, version 2 |
| 7 | * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson |
| 8 | */ |
| 9 | |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 10 | #include <linux/err.h> |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 11 | #include <linux/gpio.h> |
Samuel Ortiz | dba61c8 | 2011-12-20 18:34:36 +0100 | [diff] [blame] | 12 | #include <linux/export.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 13 | #include <linux/kernel.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 14 | #include <linux/interrupt.h> |
| 15 | #include <linux/irq.h> |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 16 | #include <linux/irqdomain.h> |
Randy Dunlap | 20d5c7d | 2012-11-12 09:20:49 -0800 | [diff] [blame] | 17 | #include <linux/of.h> |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 18 | #include <linux/of_gpio.h> |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 19 | #include <linux/pm.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 20 | #include <linux/slab.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 21 | #include <linux/mfd/core.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 22 | #include "stmpe.h" |
| 23 | |
| 24 | static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks) |
| 25 | { |
| 26 | return stmpe->variant->enable(stmpe, blocks, true); |
| 27 | } |
| 28 | |
| 29 | static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks) |
| 30 | { |
| 31 | return stmpe->variant->enable(stmpe, blocks, false); |
| 32 | } |
| 33 | |
| 34 | static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg) |
| 35 | { |
| 36 | int ret; |
| 37 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 38 | ret = stmpe->ci->read_byte(stmpe, reg); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 39 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 40 | dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 41 | |
| 42 | dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret); |
| 43 | |
| 44 | return ret; |
| 45 | } |
| 46 | |
| 47 | static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) |
| 48 | { |
| 49 | int ret; |
| 50 | |
| 51 | dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val); |
| 52 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 53 | ret = stmpe->ci->write_byte(stmpe, reg, val); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 54 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 55 | dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 56 | |
| 57 | return ret; |
| 58 | } |
| 59 | |
| 60 | static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) |
| 61 | { |
| 62 | int ret; |
| 63 | |
| 64 | ret = __stmpe_reg_read(stmpe, reg); |
| 65 | if (ret < 0) |
| 66 | return ret; |
| 67 | |
| 68 | ret &= ~mask; |
| 69 | ret |= val; |
| 70 | |
| 71 | return __stmpe_reg_write(stmpe, reg, ret); |
| 72 | } |
| 73 | |
| 74 | static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, |
| 75 | u8 *values) |
| 76 | { |
| 77 | int ret; |
| 78 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 79 | ret = stmpe->ci->read_block(stmpe, reg, length, values); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 80 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 81 | dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 82 | |
| 83 | dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret); |
| 84 | stmpe_dump_bytes("stmpe rd: ", values, length); |
| 85 | |
| 86 | return ret; |
| 87 | } |
| 88 | |
| 89 | static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, |
| 90 | const u8 *values) |
| 91 | { |
| 92 | int ret; |
| 93 | |
| 94 | dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length); |
| 95 | stmpe_dump_bytes("stmpe wr: ", values, length); |
| 96 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 97 | ret = stmpe->ci->write_block(stmpe, reg, length, values); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 98 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 99 | dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 100 | |
| 101 | return ret; |
| 102 | } |
| 103 | |
| 104 | /** |
| 105 | * stmpe_enable - enable blocks on an STMPE device |
| 106 | * @stmpe: Device to work on |
| 107 | * @blocks: Mask of blocks (enum stmpe_block values) to enable |
| 108 | */ |
| 109 | int stmpe_enable(struct stmpe *stmpe, unsigned int blocks) |
| 110 | { |
| 111 | int ret; |
| 112 | |
| 113 | mutex_lock(&stmpe->lock); |
| 114 | ret = __stmpe_enable(stmpe, blocks); |
| 115 | mutex_unlock(&stmpe->lock); |
| 116 | |
| 117 | return ret; |
| 118 | } |
| 119 | EXPORT_SYMBOL_GPL(stmpe_enable); |
| 120 | |
| 121 | /** |
| 122 | * stmpe_disable - disable blocks on an STMPE device |
| 123 | * @stmpe: Device to work on |
| 124 | * @blocks: Mask of blocks (enum stmpe_block values) to enable |
| 125 | */ |
| 126 | int stmpe_disable(struct stmpe *stmpe, unsigned int blocks) |
| 127 | { |
| 128 | int ret; |
| 129 | |
| 130 | mutex_lock(&stmpe->lock); |
| 131 | ret = __stmpe_disable(stmpe, blocks); |
| 132 | mutex_unlock(&stmpe->lock); |
| 133 | |
| 134 | return ret; |
| 135 | } |
| 136 | EXPORT_SYMBOL_GPL(stmpe_disable); |
| 137 | |
| 138 | /** |
| 139 | * stmpe_reg_read() - read a single STMPE register |
| 140 | * @stmpe: Device to read from |
| 141 | * @reg: Register to read |
| 142 | */ |
| 143 | int stmpe_reg_read(struct stmpe *stmpe, u8 reg) |
| 144 | { |
| 145 | int ret; |
| 146 | |
| 147 | mutex_lock(&stmpe->lock); |
| 148 | ret = __stmpe_reg_read(stmpe, reg); |
| 149 | mutex_unlock(&stmpe->lock); |
| 150 | |
| 151 | return ret; |
| 152 | } |
| 153 | EXPORT_SYMBOL_GPL(stmpe_reg_read); |
| 154 | |
| 155 | /** |
| 156 | * stmpe_reg_write() - write a single STMPE register |
| 157 | * @stmpe: Device to write to |
| 158 | * @reg: Register to write |
| 159 | * @val: Value to write |
| 160 | */ |
| 161 | int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) |
| 162 | { |
| 163 | int ret; |
| 164 | |
| 165 | mutex_lock(&stmpe->lock); |
| 166 | ret = __stmpe_reg_write(stmpe, reg, val); |
| 167 | mutex_unlock(&stmpe->lock); |
| 168 | |
| 169 | return ret; |
| 170 | } |
| 171 | EXPORT_SYMBOL_GPL(stmpe_reg_write); |
| 172 | |
| 173 | /** |
| 174 | * stmpe_set_bits() - set the value of a bitfield in a STMPE register |
| 175 | * @stmpe: Device to write to |
| 176 | * @reg: Register to write |
| 177 | * @mask: Mask of bits to set |
| 178 | * @val: Value to set |
| 179 | */ |
| 180 | int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) |
| 181 | { |
| 182 | int ret; |
| 183 | |
| 184 | mutex_lock(&stmpe->lock); |
| 185 | ret = __stmpe_set_bits(stmpe, reg, mask, val); |
| 186 | mutex_unlock(&stmpe->lock); |
| 187 | |
| 188 | return ret; |
| 189 | } |
| 190 | EXPORT_SYMBOL_GPL(stmpe_set_bits); |
| 191 | |
| 192 | /** |
| 193 | * stmpe_block_read() - read multiple STMPE registers |
| 194 | * @stmpe: Device to read from |
| 195 | * @reg: First register |
| 196 | * @length: Number of registers |
| 197 | * @values: Buffer to write to |
| 198 | */ |
| 199 | int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) |
| 200 | { |
| 201 | int ret; |
| 202 | |
| 203 | mutex_lock(&stmpe->lock); |
| 204 | ret = __stmpe_block_read(stmpe, reg, length, values); |
| 205 | mutex_unlock(&stmpe->lock); |
| 206 | |
| 207 | return ret; |
| 208 | } |
| 209 | EXPORT_SYMBOL_GPL(stmpe_block_read); |
| 210 | |
| 211 | /** |
| 212 | * stmpe_block_write() - write multiple STMPE registers |
| 213 | * @stmpe: Device to write to |
| 214 | * @reg: First register |
| 215 | * @length: Number of registers |
| 216 | * @values: Values to write |
| 217 | */ |
| 218 | int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, |
| 219 | const u8 *values) |
| 220 | { |
| 221 | int ret; |
| 222 | |
| 223 | mutex_lock(&stmpe->lock); |
| 224 | ret = __stmpe_block_write(stmpe, reg, length, values); |
| 225 | mutex_unlock(&stmpe->lock); |
| 226 | |
| 227 | return ret; |
| 228 | } |
| 229 | EXPORT_SYMBOL_GPL(stmpe_block_write); |
| 230 | |
| 231 | /** |
Om Prakash | 4dcaa6b | 2011-06-27 09:54:22 +0200 | [diff] [blame] | 232 | * stmpe_set_altfunc()- set the alternate function for STMPE pins |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 233 | * @stmpe: Device to configure |
| 234 | * @pins: Bitmask of pins to affect |
| 235 | * @block: block to enable alternate functions for |
| 236 | * |
| 237 | * @pins is assumed to have a bit set for each of the bits whose alternate |
| 238 | * function is to be changed, numbered according to the GPIOXY numbers. |
| 239 | * |
| 240 | * If the GPIO module is not enabled, this function automatically enables it in |
| 241 | * order to perform the change. |
| 242 | */ |
| 243 | int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block) |
| 244 | { |
| 245 | struct stmpe_variant_info *variant = stmpe->variant; |
| 246 | u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB]; |
| 247 | int af_bits = variant->af_bits; |
| 248 | int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 249 | int mask = (1 << af_bits) - 1; |
| 250 | u8 regs[numregs]; |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 251 | int af, afperreg, ret; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 252 | |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 253 | if (!variant->get_altfunc) |
| 254 | return 0; |
| 255 | |
| 256 | afperreg = 8 / af_bits; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 257 | mutex_lock(&stmpe->lock); |
| 258 | |
| 259 | ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO); |
| 260 | if (ret < 0) |
| 261 | goto out; |
| 262 | |
| 263 | ret = __stmpe_block_read(stmpe, regaddr, numregs, regs); |
| 264 | if (ret < 0) |
| 265 | goto out; |
| 266 | |
| 267 | af = variant->get_altfunc(stmpe, block); |
| 268 | |
| 269 | while (pins) { |
| 270 | int pin = __ffs(pins); |
| 271 | int regoffset = numregs - (pin / afperreg) - 1; |
| 272 | int pos = (pin % afperreg) * (8 / afperreg); |
| 273 | |
| 274 | regs[regoffset] &= ~(mask << pos); |
| 275 | regs[regoffset] |= af << pos; |
| 276 | |
| 277 | pins &= ~(1 << pin); |
| 278 | } |
| 279 | |
| 280 | ret = __stmpe_block_write(stmpe, regaddr, numregs, regs); |
| 281 | |
| 282 | out: |
| 283 | mutex_unlock(&stmpe->lock); |
| 284 | return ret; |
| 285 | } |
| 286 | EXPORT_SYMBOL_GPL(stmpe_set_altfunc); |
| 287 | |
| 288 | /* |
| 289 | * GPIO (all variants) |
| 290 | */ |
| 291 | |
| 292 | static struct resource stmpe_gpio_resources[] = { |
| 293 | /* Start and end filled dynamically */ |
| 294 | { |
| 295 | .flags = IORESOURCE_IRQ, |
| 296 | }, |
| 297 | }; |
| 298 | |
| 299 | static struct mfd_cell stmpe_gpio_cell = { |
| 300 | .name = "stmpe-gpio", |
Vipul Kumar Samar | 86605cf | 2012-11-26 17:06:51 +0530 | [diff] [blame] | 301 | .of_compatible = "st,stmpe-gpio", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 302 | .resources = stmpe_gpio_resources, |
| 303 | .num_resources = ARRAY_SIZE(stmpe_gpio_resources), |
| 304 | }; |
| 305 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 306 | static struct mfd_cell stmpe_gpio_cell_noirq = { |
| 307 | .name = "stmpe-gpio", |
Vipul Kumar Samar | 86605cf | 2012-11-26 17:06:51 +0530 | [diff] [blame] | 308 | .of_compatible = "st,stmpe-gpio", |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 309 | /* gpio cell resources consist of an irq only so no resources here */ |
| 310 | }; |
| 311 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 312 | /* |
| 313 | * Keypad (1601, 2401, 2403) |
| 314 | */ |
| 315 | |
| 316 | static struct resource stmpe_keypad_resources[] = { |
| 317 | { |
| 318 | .name = "KEYPAD", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 319 | .flags = IORESOURCE_IRQ, |
| 320 | }, |
| 321 | { |
| 322 | .name = "KEYPAD_OVER", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 323 | .flags = IORESOURCE_IRQ, |
| 324 | }, |
| 325 | }; |
| 326 | |
| 327 | static struct mfd_cell stmpe_keypad_cell = { |
| 328 | .name = "stmpe-keypad", |
Dmitry Torokhov | 6ea3238 | 2012-11-14 08:55:21 -0800 | [diff] [blame] | 329 | .of_compatible = "st,stmpe-keypad", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 330 | .resources = stmpe_keypad_resources, |
| 331 | .num_resources = ARRAY_SIZE(stmpe_keypad_resources), |
| 332 | }; |
| 333 | |
| 334 | /* |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 335 | * STMPE801 |
| 336 | */ |
| 337 | static const u8 stmpe801_regs[] = { |
| 338 | [STMPE_IDX_CHIP_ID] = STMPE801_REG_CHIP_ID, |
| 339 | [STMPE_IDX_ICR_LSB] = STMPE801_REG_SYS_CTRL, |
| 340 | [STMPE_IDX_GPMR_LSB] = STMPE801_REG_GPIO_MP_STA, |
| 341 | [STMPE_IDX_GPSR_LSB] = STMPE801_REG_GPIO_SET_PIN, |
| 342 | [STMPE_IDX_GPCR_LSB] = STMPE801_REG_GPIO_SET_PIN, |
| 343 | [STMPE_IDX_GPDR_LSB] = STMPE801_REG_GPIO_DIR, |
| 344 | [STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN, |
| 345 | [STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA, |
| 346 | |
| 347 | }; |
| 348 | |
| 349 | static struct stmpe_variant_block stmpe801_blocks[] = { |
| 350 | { |
| 351 | .cell = &stmpe_gpio_cell, |
| 352 | .irq = 0, |
| 353 | .block = STMPE_BLOCK_GPIO, |
| 354 | }, |
| 355 | }; |
| 356 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 357 | static struct stmpe_variant_block stmpe801_blocks_noirq[] = { |
| 358 | { |
| 359 | .cell = &stmpe_gpio_cell_noirq, |
| 360 | .block = STMPE_BLOCK_GPIO, |
| 361 | }, |
| 362 | }; |
| 363 | |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 364 | static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks, |
| 365 | bool enable) |
| 366 | { |
| 367 | if (blocks & STMPE_BLOCK_GPIO) |
| 368 | return 0; |
| 369 | else |
| 370 | return -EINVAL; |
| 371 | } |
| 372 | |
| 373 | static struct stmpe_variant_info stmpe801 = { |
| 374 | .name = "stmpe801", |
| 375 | .id_val = STMPE801_ID, |
| 376 | .id_mask = 0xffff, |
| 377 | .num_gpios = 8, |
| 378 | .regs = stmpe801_regs, |
| 379 | .blocks = stmpe801_blocks, |
| 380 | .num_blocks = ARRAY_SIZE(stmpe801_blocks), |
| 381 | .num_irqs = STMPE801_NR_INTERNAL_IRQS, |
| 382 | .enable = stmpe801_enable, |
| 383 | }; |
| 384 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 385 | static struct stmpe_variant_info stmpe801_noirq = { |
| 386 | .name = "stmpe801", |
| 387 | .id_val = STMPE801_ID, |
| 388 | .id_mask = 0xffff, |
| 389 | .num_gpios = 8, |
| 390 | .regs = stmpe801_regs, |
| 391 | .blocks = stmpe801_blocks_noirq, |
| 392 | .num_blocks = ARRAY_SIZE(stmpe801_blocks_noirq), |
| 393 | .enable = stmpe801_enable, |
| 394 | }; |
| 395 | |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 396 | /* |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame] | 397 | * Touchscreen (STMPE811 or STMPE610) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 398 | */ |
| 399 | |
| 400 | static struct resource stmpe_ts_resources[] = { |
| 401 | { |
| 402 | .name = "TOUCH_DET", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 403 | .flags = IORESOURCE_IRQ, |
| 404 | }, |
| 405 | { |
| 406 | .name = "FIFO_TH", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 407 | .flags = IORESOURCE_IRQ, |
| 408 | }, |
| 409 | }; |
| 410 | |
| 411 | static struct mfd_cell stmpe_ts_cell = { |
| 412 | .name = "stmpe-ts", |
Vipul Kumar Samar | 037db52 | 2012-11-22 23:42:12 -0800 | [diff] [blame] | 413 | .of_compatible = "st,stmpe-ts", |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 414 | .resources = stmpe_ts_resources, |
| 415 | .num_resources = ARRAY_SIZE(stmpe_ts_resources), |
| 416 | }; |
| 417 | |
| 418 | /* |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame] | 419 | * STMPE811 or STMPE610 |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 420 | */ |
| 421 | |
| 422 | static const u8 stmpe811_regs[] = { |
| 423 | [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID, |
| 424 | [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL, |
| 425 | [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN, |
| 426 | [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA, |
| 427 | [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA, |
| 428 | [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN, |
| 429 | [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN, |
| 430 | [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR, |
| 431 | [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE, |
| 432 | [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE, |
| 433 | [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF, |
| 434 | [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN, |
| 435 | [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA, |
| 436 | [STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED, |
| 437 | }; |
| 438 | |
| 439 | static struct stmpe_variant_block stmpe811_blocks[] = { |
| 440 | { |
| 441 | .cell = &stmpe_gpio_cell, |
| 442 | .irq = STMPE811_IRQ_GPIOC, |
| 443 | .block = STMPE_BLOCK_GPIO, |
| 444 | }, |
| 445 | { |
| 446 | .cell = &stmpe_ts_cell, |
| 447 | .irq = STMPE811_IRQ_TOUCH_DET, |
| 448 | .block = STMPE_BLOCK_TOUCHSCREEN, |
| 449 | }, |
| 450 | }; |
| 451 | |
| 452 | static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks, |
| 453 | bool enable) |
| 454 | { |
| 455 | unsigned int mask = 0; |
| 456 | |
| 457 | if (blocks & STMPE_BLOCK_GPIO) |
| 458 | mask |= STMPE811_SYS_CTRL2_GPIO_OFF; |
| 459 | |
| 460 | if (blocks & STMPE_BLOCK_ADC) |
| 461 | mask |= STMPE811_SYS_CTRL2_ADC_OFF; |
| 462 | |
| 463 | if (blocks & STMPE_BLOCK_TOUCHSCREEN) |
| 464 | mask |= STMPE811_SYS_CTRL2_TSC_OFF; |
| 465 | |
| 466 | return __stmpe_set_bits(stmpe, STMPE811_REG_SYS_CTRL2, mask, |
| 467 | enable ? 0 : mask); |
| 468 | } |
| 469 | |
| 470 | static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) |
| 471 | { |
| 472 | /* 0 for touchscreen, 1 for GPIO */ |
| 473 | return block != STMPE_BLOCK_TOUCHSCREEN; |
| 474 | } |
| 475 | |
| 476 | static struct stmpe_variant_info stmpe811 = { |
| 477 | .name = "stmpe811", |
| 478 | .id_val = 0x0811, |
| 479 | .id_mask = 0xffff, |
| 480 | .num_gpios = 8, |
| 481 | .af_bits = 1, |
| 482 | .regs = stmpe811_regs, |
| 483 | .blocks = stmpe811_blocks, |
| 484 | .num_blocks = ARRAY_SIZE(stmpe811_blocks), |
| 485 | .num_irqs = STMPE811_NR_INTERNAL_IRQS, |
| 486 | .enable = stmpe811_enable, |
| 487 | .get_altfunc = stmpe811_get_altfunc, |
| 488 | }; |
| 489 | |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame] | 490 | /* Similar to 811, except number of gpios */ |
| 491 | static struct stmpe_variant_info stmpe610 = { |
| 492 | .name = "stmpe610", |
| 493 | .id_val = 0x0811, |
| 494 | .id_mask = 0xffff, |
| 495 | .num_gpios = 6, |
| 496 | .af_bits = 1, |
| 497 | .regs = stmpe811_regs, |
| 498 | .blocks = stmpe811_blocks, |
| 499 | .num_blocks = ARRAY_SIZE(stmpe811_blocks), |
| 500 | .num_irqs = STMPE811_NR_INTERNAL_IRQS, |
| 501 | .enable = stmpe811_enable, |
| 502 | .get_altfunc = stmpe811_get_altfunc, |
| 503 | }; |
| 504 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 505 | /* |
| 506 | * STMPE1601 |
| 507 | */ |
| 508 | |
| 509 | static const u8 stmpe1601_regs[] = { |
| 510 | [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID, |
| 511 | [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB, |
| 512 | [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB, |
| 513 | [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB, |
| 514 | [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB, |
| 515 | [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB, |
| 516 | [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB, |
| 517 | [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB, |
| 518 | [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB, |
| 519 | [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB, |
| 520 | [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB, |
| 521 | [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB, |
| 522 | [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB, |
| 523 | [STMPE_IDX_GPEDR_MSB] = STMPE1601_REG_GPIO_ED_MSB, |
| 524 | }; |
| 525 | |
| 526 | static struct stmpe_variant_block stmpe1601_blocks[] = { |
| 527 | { |
| 528 | .cell = &stmpe_gpio_cell, |
Lee Jones | 5204e51 | 2012-11-05 16:10:32 +0100 | [diff] [blame] | 529 | .irq = STMPE1601_IRQ_GPIOC, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 530 | .block = STMPE_BLOCK_GPIO, |
| 531 | }, |
| 532 | { |
| 533 | .cell = &stmpe_keypad_cell, |
Lee Jones | 5204e51 | 2012-11-05 16:10:32 +0100 | [diff] [blame] | 534 | .irq = STMPE1601_IRQ_KEYPAD, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 535 | .block = STMPE_BLOCK_KEYPAD, |
| 536 | }, |
| 537 | }; |
| 538 | |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 539 | /* supported autosleep timeout delay (in msecs) */ |
| 540 | static const int stmpe_autosleep_delay[] = { |
| 541 | 4, 16, 32, 64, 128, 256, 512, 1024, |
| 542 | }; |
| 543 | |
| 544 | static int stmpe_round_timeout(int timeout) |
| 545 | { |
| 546 | int i; |
| 547 | |
| 548 | for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) { |
| 549 | if (stmpe_autosleep_delay[i] >= timeout) |
| 550 | return i; |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * requests for delays longer than supported should not return the |
| 555 | * longest supported delay |
| 556 | */ |
| 557 | return -EINVAL; |
| 558 | } |
| 559 | |
| 560 | static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout) |
| 561 | { |
| 562 | int ret; |
| 563 | |
| 564 | if (!stmpe->variant->enable_autosleep) |
| 565 | return -ENOSYS; |
| 566 | |
| 567 | mutex_lock(&stmpe->lock); |
| 568 | ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout); |
| 569 | mutex_unlock(&stmpe->lock); |
| 570 | |
| 571 | return ret; |
| 572 | } |
| 573 | |
| 574 | /* |
| 575 | * Both stmpe 1601/2403 support same layout for autosleep |
| 576 | */ |
| 577 | static int stmpe1601_autosleep(struct stmpe *stmpe, |
| 578 | int autosleep_timeout) |
| 579 | { |
| 580 | int ret, timeout; |
| 581 | |
| 582 | /* choose the best available timeout */ |
| 583 | timeout = stmpe_round_timeout(autosleep_timeout); |
| 584 | if (timeout < 0) { |
| 585 | dev_err(stmpe->dev, "invalid timeout\n"); |
| 586 | return timeout; |
| 587 | } |
| 588 | |
| 589 | ret = __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2, |
| 590 | STMPE1601_AUTOSLEEP_TIMEOUT_MASK, |
| 591 | timeout); |
| 592 | if (ret < 0) |
| 593 | return ret; |
| 594 | |
| 595 | return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2, |
| 596 | STPME1601_AUTOSLEEP_ENABLE, |
| 597 | STPME1601_AUTOSLEEP_ENABLE); |
| 598 | } |
| 599 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 600 | static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks, |
| 601 | bool enable) |
| 602 | { |
| 603 | unsigned int mask = 0; |
| 604 | |
| 605 | if (blocks & STMPE_BLOCK_GPIO) |
| 606 | mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO; |
| 607 | |
| 608 | if (blocks & STMPE_BLOCK_KEYPAD) |
| 609 | mask |= STMPE1601_SYS_CTRL_ENABLE_KPC; |
| 610 | |
| 611 | return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL, mask, |
| 612 | enable ? mask : 0); |
| 613 | } |
| 614 | |
| 615 | static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) |
| 616 | { |
| 617 | switch (block) { |
| 618 | case STMPE_BLOCK_PWM: |
| 619 | return 2; |
| 620 | |
| 621 | case STMPE_BLOCK_KEYPAD: |
| 622 | return 1; |
| 623 | |
| 624 | case STMPE_BLOCK_GPIO: |
| 625 | default: |
| 626 | return 0; |
| 627 | } |
| 628 | } |
| 629 | |
| 630 | static struct stmpe_variant_info stmpe1601 = { |
| 631 | .name = "stmpe1601", |
| 632 | .id_val = 0x0210, |
| 633 | .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */ |
| 634 | .num_gpios = 16, |
| 635 | .af_bits = 2, |
| 636 | .regs = stmpe1601_regs, |
| 637 | .blocks = stmpe1601_blocks, |
| 638 | .num_blocks = ARRAY_SIZE(stmpe1601_blocks), |
| 639 | .num_irqs = STMPE1601_NR_INTERNAL_IRQS, |
| 640 | .enable = stmpe1601_enable, |
| 641 | .get_altfunc = stmpe1601_get_altfunc, |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 642 | .enable_autosleep = stmpe1601_autosleep, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 643 | }; |
| 644 | |
| 645 | /* |
| 646 | * STMPE24XX |
| 647 | */ |
| 648 | |
| 649 | static const u8 stmpe24xx_regs[] = { |
| 650 | [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID, |
| 651 | [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB, |
| 652 | [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB, |
| 653 | [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB, |
| 654 | [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB, |
| 655 | [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB, |
| 656 | [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB, |
| 657 | [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB, |
| 658 | [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB, |
| 659 | [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB, |
| 660 | [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB, |
| 661 | [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB, |
| 662 | [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB, |
| 663 | [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB, |
| 664 | }; |
| 665 | |
| 666 | static struct stmpe_variant_block stmpe24xx_blocks[] = { |
| 667 | { |
| 668 | .cell = &stmpe_gpio_cell, |
| 669 | .irq = STMPE24XX_IRQ_GPIOC, |
| 670 | .block = STMPE_BLOCK_GPIO, |
| 671 | }, |
| 672 | { |
| 673 | .cell = &stmpe_keypad_cell, |
| 674 | .irq = STMPE24XX_IRQ_KEYPAD, |
| 675 | .block = STMPE_BLOCK_KEYPAD, |
| 676 | }, |
| 677 | }; |
| 678 | |
| 679 | static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks, |
| 680 | bool enable) |
| 681 | { |
| 682 | unsigned int mask = 0; |
| 683 | |
| 684 | if (blocks & STMPE_BLOCK_GPIO) |
| 685 | mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO; |
| 686 | |
| 687 | if (blocks & STMPE_BLOCK_KEYPAD) |
| 688 | mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC; |
| 689 | |
| 690 | return __stmpe_set_bits(stmpe, STMPE24XX_REG_SYS_CTRL, mask, |
| 691 | enable ? mask : 0); |
| 692 | } |
| 693 | |
| 694 | static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) |
| 695 | { |
| 696 | switch (block) { |
| 697 | case STMPE_BLOCK_ROTATOR: |
| 698 | return 2; |
| 699 | |
| 700 | case STMPE_BLOCK_KEYPAD: |
| 701 | return 1; |
| 702 | |
| 703 | case STMPE_BLOCK_GPIO: |
| 704 | default: |
| 705 | return 0; |
| 706 | } |
| 707 | } |
| 708 | |
| 709 | static struct stmpe_variant_info stmpe2401 = { |
| 710 | .name = "stmpe2401", |
| 711 | .id_val = 0x0101, |
| 712 | .id_mask = 0xffff, |
| 713 | .num_gpios = 24, |
| 714 | .af_bits = 2, |
| 715 | .regs = stmpe24xx_regs, |
| 716 | .blocks = stmpe24xx_blocks, |
| 717 | .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), |
| 718 | .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, |
| 719 | .enable = stmpe24xx_enable, |
| 720 | .get_altfunc = stmpe24xx_get_altfunc, |
| 721 | }; |
| 722 | |
| 723 | static struct stmpe_variant_info stmpe2403 = { |
| 724 | .name = "stmpe2403", |
| 725 | .id_val = 0x0120, |
| 726 | .id_mask = 0xffff, |
| 727 | .num_gpios = 24, |
| 728 | .af_bits = 2, |
| 729 | .regs = stmpe24xx_regs, |
| 730 | .blocks = stmpe24xx_blocks, |
| 731 | .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), |
| 732 | .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, |
| 733 | .enable = stmpe24xx_enable, |
| 734 | .get_altfunc = stmpe24xx_get_altfunc, |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 735 | .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */ |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 736 | }; |
| 737 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 738 | static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = { |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame] | 739 | [STMPE610] = &stmpe610, |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 740 | [STMPE801] = &stmpe801, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 741 | [STMPE811] = &stmpe811, |
| 742 | [STMPE1601] = &stmpe1601, |
| 743 | [STMPE2401] = &stmpe2401, |
| 744 | [STMPE2403] = &stmpe2403, |
| 745 | }; |
| 746 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 747 | /* |
| 748 | * These devices can be connected in a 'no-irq' configuration - the irq pin |
| 749 | * is not used and the device cannot interrupt the CPU. Here we only list |
| 750 | * devices which support this configuration - the driver will fail probing |
| 751 | * for any devices not listed here which are configured in this way. |
| 752 | */ |
| 753 | static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = { |
| 754 | [STMPE801] = &stmpe801_noirq, |
| 755 | }; |
| 756 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 757 | static irqreturn_t stmpe_irq(int irq, void *data) |
| 758 | { |
| 759 | struct stmpe *stmpe = data; |
| 760 | struct stmpe_variant_info *variant = stmpe->variant; |
| 761 | int num = DIV_ROUND_UP(variant->num_irqs, 8); |
| 762 | u8 israddr = stmpe->regs[STMPE_IDX_ISR_MSB]; |
| 763 | u8 isr[num]; |
| 764 | int ret; |
| 765 | int i; |
| 766 | |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 767 | if (variant->id_val == STMPE801_ID) { |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 768 | int base = irq_create_mapping(stmpe->domain, 0); |
| 769 | |
| 770 | handle_nested_irq(base); |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 771 | return IRQ_HANDLED; |
| 772 | } |
| 773 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 774 | ret = stmpe_block_read(stmpe, israddr, num, isr); |
| 775 | if (ret < 0) |
| 776 | return IRQ_NONE; |
| 777 | |
| 778 | for (i = 0; i < num; i++) { |
| 779 | int bank = num - i - 1; |
| 780 | u8 status = isr[i]; |
| 781 | u8 clear; |
| 782 | |
| 783 | status &= stmpe->ier[bank]; |
| 784 | if (!status) |
| 785 | continue; |
| 786 | |
| 787 | clear = status; |
| 788 | while (status) { |
| 789 | int bit = __ffs(status); |
| 790 | int line = bank * 8 + bit; |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 791 | int nestedirq = irq_create_mapping(stmpe->domain, line); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 792 | |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 793 | handle_nested_irq(nestedirq); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 794 | status &= ~(1 << bit); |
| 795 | } |
| 796 | |
| 797 | stmpe_reg_write(stmpe, israddr + i, clear); |
| 798 | } |
| 799 | |
| 800 | return IRQ_HANDLED; |
| 801 | } |
| 802 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 803 | static void stmpe_irq_lock(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 804 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 805 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 806 | |
| 807 | mutex_lock(&stmpe->irq_lock); |
| 808 | } |
| 809 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 810 | static void stmpe_irq_sync_unlock(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 811 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 812 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 813 | struct stmpe_variant_info *variant = stmpe->variant; |
| 814 | int num = DIV_ROUND_UP(variant->num_irqs, 8); |
| 815 | int i; |
| 816 | |
| 817 | for (i = 0; i < num; i++) { |
| 818 | u8 new = stmpe->ier[i]; |
| 819 | u8 old = stmpe->oldier[i]; |
| 820 | |
| 821 | if (new == old) |
| 822 | continue; |
| 823 | |
| 824 | stmpe->oldier[i] = new; |
| 825 | stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB] - i, new); |
| 826 | } |
| 827 | |
| 828 | mutex_unlock(&stmpe->irq_lock); |
| 829 | } |
| 830 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 831 | static void stmpe_irq_mask(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 832 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 833 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 834 | int offset = data->hwirq; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 835 | int regoffset = offset / 8; |
| 836 | int mask = 1 << (offset % 8); |
| 837 | |
| 838 | stmpe->ier[regoffset] &= ~mask; |
| 839 | } |
| 840 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 841 | static void stmpe_irq_unmask(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 842 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 843 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 844 | int offset = data->hwirq; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 845 | int regoffset = offset / 8; |
| 846 | int mask = 1 << (offset % 8); |
| 847 | |
| 848 | stmpe->ier[regoffset] |= mask; |
| 849 | } |
| 850 | |
| 851 | static struct irq_chip stmpe_irq_chip = { |
| 852 | .name = "stmpe", |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 853 | .irq_bus_lock = stmpe_irq_lock, |
| 854 | .irq_bus_sync_unlock = stmpe_irq_sync_unlock, |
| 855 | .irq_mask = stmpe_irq_mask, |
| 856 | .irq_unmask = stmpe_irq_unmask, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 857 | }; |
| 858 | |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 859 | static int stmpe_irq_map(struct irq_domain *d, unsigned int virq, |
| 860 | irq_hw_number_t hwirq) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 861 | { |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 862 | struct stmpe *stmpe = d->host_data; |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 863 | struct irq_chip *chip = NULL; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 864 | |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 865 | if (stmpe->variant->id_val != STMPE801_ID) |
| 866 | chip = &stmpe_irq_chip; |
| 867 | |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 868 | irq_set_chip_data(virq, stmpe); |
| 869 | irq_set_chip_and_handler(virq, chip, handle_edge_irq); |
| 870 | irq_set_nested_thread(virq, 1); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 871 | #ifdef CONFIG_ARM |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 872 | set_irq_flags(virq, IRQF_VALID); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 873 | #else |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 874 | irq_set_noprobe(virq); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 875 | #endif |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 876 | |
| 877 | return 0; |
| 878 | } |
| 879 | |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 880 | static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 881 | { |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 882 | #ifdef CONFIG_ARM |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 883 | set_irq_flags(virq, 0); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 884 | #endif |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 885 | irq_set_chip_and_handler(virq, NULL, NULL); |
| 886 | irq_set_chip_data(virq, NULL); |
| 887 | } |
| 888 | |
| 889 | static struct irq_domain_ops stmpe_irq_ops = { |
| 890 | .map = stmpe_irq_map, |
| 891 | .unmap = stmpe_irq_unmap, |
| 892 | .xlate = irq_domain_xlate_twocell, |
| 893 | }; |
| 894 | |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 895 | static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np) |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 896 | { |
Lee Jones | b20a437 | 2012-11-23 15:19:29 +0000 | [diff] [blame] | 897 | int base = 0; |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 898 | int num_irqs = stmpe->variant->num_irqs; |
| 899 | |
Lee Jones | b20a437 | 2012-11-23 15:19:29 +0000 | [diff] [blame] | 900 | if (!np) |
| 901 | base = stmpe->irq_base; |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 902 | |
Lee Jones | b20a437 | 2012-11-23 15:19:29 +0000 | [diff] [blame] | 903 | stmpe->domain = irq_domain_add_simple(np, num_irqs, base, |
| 904 | &stmpe_irq_ops, stmpe); |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 905 | if (!stmpe->domain) { |
| 906 | dev_err(stmpe->dev, "Failed to create irqdomain\n"); |
| 907 | return -ENOSYS; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 908 | } |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 909 | |
| 910 | return 0; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 911 | } |
| 912 | |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 913 | static int stmpe_chip_init(struct stmpe *stmpe) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 914 | { |
| 915 | unsigned int irq_trigger = stmpe->pdata->irq_trigger; |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 916 | int autosleep_timeout = stmpe->pdata->autosleep_timeout; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 917 | struct stmpe_variant_info *variant = stmpe->variant; |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 918 | u8 icr = 0; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 919 | unsigned int id; |
| 920 | u8 data[2]; |
| 921 | int ret; |
| 922 | |
| 923 | ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID], |
| 924 | ARRAY_SIZE(data), data); |
| 925 | if (ret < 0) |
| 926 | return ret; |
| 927 | |
| 928 | id = (data[0] << 8) | data[1]; |
| 929 | if ((id & variant->id_mask) != variant->id_val) { |
| 930 | dev_err(stmpe->dev, "unknown chip id: %#x\n", id); |
| 931 | return -EINVAL; |
| 932 | } |
| 933 | |
| 934 | dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id); |
| 935 | |
| 936 | /* Disable all modules -- subdrivers should enable what they need. */ |
| 937 | ret = stmpe_disable(stmpe, ~0); |
| 938 | if (ret) |
| 939 | return ret; |
| 940 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 941 | if (stmpe->irq >= 0) { |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 942 | if (id == STMPE801_ID) |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 943 | icr = STMPE801_REG_SYS_CTRL_INT_EN; |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 944 | else |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 945 | icr = STMPE_ICR_LSB_GIM; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 946 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 947 | /* STMPE801 doesn't support Edge interrupts */ |
| 948 | if (id != STMPE801_ID) { |
| 949 | if (irq_trigger == IRQF_TRIGGER_FALLING || |
| 950 | irq_trigger == IRQF_TRIGGER_RISING) |
| 951 | icr |= STMPE_ICR_LSB_EDGE; |
| 952 | } |
| 953 | |
| 954 | if (irq_trigger == IRQF_TRIGGER_RISING || |
| 955 | irq_trigger == IRQF_TRIGGER_HIGH) { |
| 956 | if (id == STMPE801_ID) |
| 957 | icr |= STMPE801_REG_SYS_CTRL_INT_HI; |
| 958 | else |
| 959 | icr |= STMPE_ICR_LSB_HIGH; |
| 960 | } |
Viresh Kumar | 7f7f4ea | 2011-11-17 11:02:23 +0530 | [diff] [blame] | 961 | } |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 962 | |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 963 | if (stmpe->pdata->autosleep) { |
| 964 | ret = stmpe_autosleep(stmpe, autosleep_timeout); |
| 965 | if (ret) |
| 966 | return ret; |
| 967 | } |
| 968 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 969 | return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr); |
| 970 | } |
| 971 | |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 972 | static int stmpe_add_device(struct stmpe *stmpe, struct mfd_cell *cell) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 973 | { |
| 974 | return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1, |
Lee Jones | 76f9399 | 2012-11-05 16:10:31 +0100 | [diff] [blame] | 975 | NULL, stmpe->irq_base, stmpe->domain); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 976 | } |
| 977 | |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 978 | static int stmpe_devices_init(struct stmpe *stmpe) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 979 | { |
| 980 | struct stmpe_variant_info *variant = stmpe->variant; |
| 981 | unsigned int platform_blocks = stmpe->pdata->blocks; |
| 982 | int ret = -EINVAL; |
Lee Jones | 7da0cbf | 2012-11-05 16:10:30 +0100 | [diff] [blame] | 983 | int i, j; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 984 | |
| 985 | for (i = 0; i < variant->num_blocks; i++) { |
| 986 | struct stmpe_variant_block *block = &variant->blocks[i]; |
| 987 | |
| 988 | if (!(platform_blocks & block->block)) |
| 989 | continue; |
| 990 | |
Lee Jones | 7da0cbf | 2012-11-05 16:10:30 +0100 | [diff] [blame] | 991 | for (j = 0; j < block->cell->num_resources; j++) { |
| 992 | struct resource *res = |
| 993 | (struct resource *) &block->cell->resources[j]; |
| 994 | |
| 995 | /* Dynamically fill in a variant's IRQ. */ |
| 996 | if (res->flags & IORESOURCE_IRQ) |
| 997 | res->start = res->end = block->irq + j; |
| 998 | } |
| 999 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1000 | platform_blocks &= ~block->block; |
Lee Jones | 7da0cbf | 2012-11-05 16:10:30 +0100 | [diff] [blame] | 1001 | ret = stmpe_add_device(stmpe, block->cell); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1002 | if (ret) |
| 1003 | return ret; |
| 1004 | } |
| 1005 | |
| 1006 | if (platform_blocks) |
| 1007 | dev_warn(stmpe->dev, |
| 1008 | "platform wants blocks (%#x) not present on variant", |
| 1009 | platform_blocks); |
| 1010 | |
| 1011 | return ret; |
| 1012 | } |
| 1013 | |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 1014 | void stmpe_of_probe(struct stmpe_platform_data *pdata, struct device_node *np) |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1015 | { |
| 1016 | struct device_node *child; |
| 1017 | |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 1018 | pdata->id = -1; |
| 1019 | pdata->irq_trigger = IRQF_TRIGGER_NONE; |
| 1020 | |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1021 | of_property_read_u32(np, "st,autosleep-timeout", |
| 1022 | &pdata->autosleep_timeout); |
| 1023 | |
| 1024 | pdata->autosleep = (pdata->autosleep_timeout) ? true : false; |
| 1025 | |
| 1026 | for_each_child_of_node(np, child) { |
| 1027 | if (!strcmp(child->name, "stmpe_gpio")) { |
| 1028 | pdata->blocks |= STMPE_BLOCK_GPIO; |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 1029 | } else if (!strcmp(child->name, "stmpe_keypad")) { |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1030 | pdata->blocks |= STMPE_BLOCK_KEYPAD; |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 1031 | } else if (!strcmp(child->name, "stmpe_touchscreen")) { |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1032 | pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN; |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 1033 | } else if (!strcmp(child->name, "stmpe_adc")) { |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1034 | pdata->blocks |= STMPE_BLOCK_ADC; |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 1035 | } else if (!strcmp(child->name, "stmpe_pwm")) { |
| 1036 | pdata->blocks |= STMPE_BLOCK_PWM; |
| 1037 | } else if (!strcmp(child->name, "stmpe_rotator")) { |
| 1038 | pdata->blocks |= STMPE_BLOCK_ROTATOR; |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1039 | } |
| 1040 | } |
| 1041 | } |
| 1042 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1043 | /* Called from client specific probe routines */ |
Greg Kroah-Hartman | 612b95c | 2012-12-21 15:03:15 -0800 | [diff] [blame] | 1044 | int stmpe_probe(struct stmpe_client_info *ci, int partnum) |
Sundar Iyer | 208c434 | 2010-09-15 10:30:54 +0530 | [diff] [blame] | 1045 | { |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1046 | struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev); |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1047 | struct device_node *np = ci->dev->of_node; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1048 | struct stmpe *stmpe; |
| 1049 | int ret; |
| 1050 | |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1051 | if (!pdata) { |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1052 | if (!np) |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1053 | return -EINVAL; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1054 | |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1055 | pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL); |
| 1056 | if (!pdata) |
| 1057 | return -ENOMEM; |
| 1058 | |
| 1059 | stmpe_of_probe(pdata, np); |
Gabriel Fernandez | a200e32 | 2013-03-01 13:07:16 +0100 | [diff] [blame^] | 1060 | |
| 1061 | if (of_find_property(np, "interrupts", NULL) == NULL) |
| 1062 | ci->irq = -1; |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1063 | } |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1064 | |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1065 | stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1066 | if (!stmpe) |
| 1067 | return -ENOMEM; |
| 1068 | |
| 1069 | mutex_init(&stmpe->irq_lock); |
| 1070 | mutex_init(&stmpe->lock); |
| 1071 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1072 | stmpe->dev = ci->dev; |
| 1073 | stmpe->client = ci->client; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1074 | stmpe->pdata = pdata; |
| 1075 | stmpe->irq_base = pdata->irq_base; |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1076 | stmpe->ci = ci; |
| 1077 | stmpe->partnum = partnum; |
| 1078 | stmpe->variant = stmpe_variant_info[partnum]; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1079 | stmpe->regs = stmpe->variant->regs; |
| 1080 | stmpe->num_gpios = stmpe->variant->num_gpios; |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1081 | dev_set_drvdata(stmpe->dev, stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1082 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1083 | if (ci->init) |
| 1084 | ci->init(stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1085 | |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 1086 | if (pdata->irq_over_gpio) { |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1087 | ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio, |
| 1088 | GPIOF_DIR_IN, "stmpe"); |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 1089 | if (ret) { |
| 1090 | dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", |
| 1091 | ret); |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1092 | return ret; |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 1093 | } |
| 1094 | |
| 1095 | stmpe->irq = gpio_to_irq(pdata->irq_gpio); |
| 1096 | } else { |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1097 | stmpe->irq = ci->irq; |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 1098 | } |
| 1099 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1100 | if (stmpe->irq < 0) { |
| 1101 | /* use alternate variant info for no-irq mode, if supported */ |
| 1102 | dev_info(stmpe->dev, |
| 1103 | "%s configured in no-irq mode by platform data\n", |
| 1104 | stmpe->variant->name); |
| 1105 | if (!stmpe_noirq_variant_info[stmpe->partnum]) { |
| 1106 | dev_err(stmpe->dev, |
| 1107 | "%s does not support no-irq mode!\n", |
| 1108 | stmpe->variant->name); |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1109 | return -ENODEV; |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1110 | } |
| 1111 | stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum]; |
Vipul Kumar Samar | ac713cc | 2012-12-07 20:29:37 +0530 | [diff] [blame] | 1112 | } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) { |
| 1113 | pdata->irq_trigger = |
| 1114 | irqd_get_trigger_type(irq_get_irq_data(stmpe->irq)); |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1115 | } |
| 1116 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1117 | ret = stmpe_chip_init(stmpe); |
| 1118 | if (ret) |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1119 | return ret; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1120 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1121 | if (stmpe->irq >= 0) { |
Lee Jones | 909582c | 2012-11-05 16:10:33 +0100 | [diff] [blame] | 1122 | ret = stmpe_irq_init(stmpe, np); |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1123 | if (ret) |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1124 | return ret; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1125 | |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1126 | ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL, |
| 1127 | stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT, |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1128 | "stmpe", stmpe); |
| 1129 | if (ret) { |
| 1130 | dev_err(stmpe->dev, "failed to request IRQ: %d\n", |
| 1131 | ret); |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1132 | return ret; |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1133 | } |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1134 | } |
| 1135 | |
| 1136 | ret = stmpe_devices_init(stmpe); |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1137 | if (!ret) |
| 1138 | return 0; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1139 | |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1140 | dev_err(stmpe->dev, "failed to add children\n"); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1141 | mfd_remove_devices(stmpe->dev); |
Viresh Kumar | cb5faba | 2012-11-22 10:40:29 +0530 | [diff] [blame] | 1142 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1143 | return ret; |
| 1144 | } |
| 1145 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1146 | int stmpe_remove(struct stmpe *stmpe) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1147 | { |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1148 | mfd_remove_devices(stmpe->dev); |
| 1149 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1150 | return 0; |
| 1151 | } |
| 1152 | |
Sundar Iyer | 208c434 | 2010-09-15 10:30:54 +0530 | [diff] [blame] | 1153 | #ifdef CONFIG_PM |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1154 | static int stmpe_suspend(struct device *dev) |
| 1155 | { |
| 1156 | struct stmpe *stmpe = dev_get_drvdata(dev); |
| 1157 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1158 | if (stmpe->irq >= 0 && device_may_wakeup(dev)) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1159 | enable_irq_wake(stmpe->irq); |
| 1160 | |
| 1161 | return 0; |
| 1162 | } |
| 1163 | |
| 1164 | static int stmpe_resume(struct device *dev) |
| 1165 | { |
| 1166 | struct stmpe *stmpe = dev_get_drvdata(dev); |
| 1167 | |
Chris Blair | e31f9b8 | 2012-01-26 22:17:03 +0100 | [diff] [blame] | 1168 | if (stmpe->irq >= 0 && device_may_wakeup(dev)) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 1169 | disable_irq_wake(stmpe->irq); |
| 1170 | |
| 1171 | return 0; |
| 1172 | } |
| 1173 | |
| 1174 | const struct dev_pm_ops stmpe_dev_pm_ops = { |
Sundar Iyer | 208c434 | 2010-09-15 10:30:54 +0530 | [diff] [blame] | 1175 | .suspend = stmpe_suspend, |
| 1176 | .resume = stmpe_resume, |
| 1177 | }; |
| 1178 | #endif |