drivers/mfd/stmpe.c

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This source file includes following definitions.
__stmpe_enable
__stmpe_disable
__stmpe_reg_read
__stmpe_reg_write
__stmpe_set_bits
__stmpe_block_read
__stmpe_block_write
stmpe_enable
stmpe_disable
stmpe_reg_read
stmpe_reg_write
stmpe_set_bits
stmpe_block_read
stmpe_block_write
stmpe_set_altfunc
stmpe801_enable
stmpe811_enable
stmpe811_adc_common_init
stmpe811_get_altfunc
stmpe1600_enable
stmpe_round_timeout
stmpe_autosleep
stmpe1601_autosleep
stmpe1601_enable
stmpe1601_get_altfunc
stmpe1801_enable
stmpe_reset
stmpe24xx_enable
stmpe24xx_get_altfunc
stmpe_irq
stmpe_irq_lock
stmpe_irq_sync_unlock
stmpe_irq_mask
stmpe_irq_unmask
stmpe_irq_map
stmpe_irq_unmap
stmpe_irq_init
stmpe_chip_init
stmpe_add_device
stmpe_devices_init
stmpe_of_probe
stmpe_probe
stmpe_remove
stmpe_suspend
stmpe_resume
   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * ST Microelectronics MFD: stmpe's driver
   4  *
   5  * Copyright (C) ST-Ericsson SA 2010
   6  *
   7  * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
   8  */
   9 
  10 #include <linux/err.h>
  11 #include <linux/gpio.h>
  12 #include <linux/export.h>
  13 #include <linux/kernel.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/irq.h>
  16 #include <linux/irqdomain.h>
  17 #include <linux/of.h>
  18 #include <linux/of_gpio.h>
  19 #include <linux/pm.h>
  20 #include <linux/slab.h>
  21 #include <linux/mfd/core.h>
  22 #include <linux/delay.h>
  23 #include <linux/regulator/consumer.h>
  24 #include "stmpe.h"
  25 
  26 /**
  27  * struct stmpe_platform_data - STMPE platform data
  28  * @id: device id to distinguish between multiple STMPEs on the same board
  29  * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*)
  30  * @irq_trigger: IRQ trigger to use for the interrupt to the host
  31  * @autosleep: bool to enable/disable stmpe autosleep
  32  * @autosleep_timeout: inactivity timeout in milliseconds for autosleep
  33  * @irq_over_gpio: true if gpio is used to get irq
  34  * @irq_gpio: gpio number over which irq will be requested (significant only if
  35  *            irq_over_gpio is true)
  36  */
  37 struct stmpe_platform_data {
  38         int id;
  39         unsigned int blocks;
  40         unsigned int irq_trigger;
  41         bool autosleep;
  42         bool irq_over_gpio;
  43         int irq_gpio;
  44         int autosleep_timeout;
  45 };
  46 
  47 static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
  48 {
  49         return stmpe->variant->enable(stmpe, blocks, true);
  50 }
  51 
  52 static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
  53 {
  54         return stmpe->variant->enable(stmpe, blocks, false);
  55 }
  56 
  57 static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg)
  58 {
  59         int ret;
  60 
  61         ret = stmpe->ci->read_byte(stmpe, reg);
  62         if (ret < 0)
  63                 dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret);
  64 
  65         dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret);
  66 
  67         return ret;
  68 }
  69 
  70 static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
  71 {
  72         int ret;
  73 
  74         dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val);
  75 
  76         ret = stmpe->ci->write_byte(stmpe, reg, val);
  77         if (ret < 0)
  78                 dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret);
  79 
  80         return ret;
  81 }
  82 
  83 static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
  84 {
  85         int ret;
  86 
  87         ret = __stmpe_reg_read(stmpe, reg);
  88         if (ret < 0)
  89                 return ret;
  90 
  91         ret &= ~mask;
  92         ret |= val;
  93 
  94         return __stmpe_reg_write(stmpe, reg, ret);
  95 }
  96 
  97 static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
  98                               u8 *values)
  99 {
 100         int ret;
 101 
 102         ret = stmpe->ci->read_block(stmpe, reg, length, values);
 103         if (ret < 0)
 104                 dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret);
 105 
 106         dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret);
 107         stmpe_dump_bytes("stmpe rd: ", values, length);
 108 
 109         return ret;
 110 }
 111 
 112 static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
 113                         const u8 *values)
 114 {
 115         int ret;
 116 
 117         dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length);
 118         stmpe_dump_bytes("stmpe wr: ", values, length);
 119 
 120         ret = stmpe->ci->write_block(stmpe, reg, length, values);
 121         if (ret < 0)
 122                 dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret);
 123 
 124         return ret;
 125 }
 126 
 127 /**
 128  * stmpe_enable - enable blocks on an STMPE device
 129  * @stmpe:      Device to work on
 130  * @blocks:     Mask of blocks (enum stmpe_block values) to enable
 131  */
 132 int stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
 133 {
 134         int ret;
 135 
 136         mutex_lock(&stmpe->lock);
 137         ret = __stmpe_enable(stmpe, blocks);
 138         mutex_unlock(&stmpe->lock);
 139 
 140         return ret;
 141 }
 142 EXPORT_SYMBOL_GPL(stmpe_enable);
 143 
 144 /**
 145  * stmpe_disable - disable blocks on an STMPE device
 146  * @stmpe:      Device to work on
 147  * @blocks:     Mask of blocks (enum stmpe_block values) to enable
 148  */
 149 int stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
 150 {
 151         int ret;
 152 
 153         mutex_lock(&stmpe->lock);
 154         ret = __stmpe_disable(stmpe, blocks);
 155         mutex_unlock(&stmpe->lock);
 156 
 157         return ret;
 158 }
 159 EXPORT_SYMBOL_GPL(stmpe_disable);
 160 
 161 /**
 162  * stmpe_reg_read() - read a single STMPE register
 163  * @stmpe:      Device to read from
 164  * @reg:        Register to read
 165  */
 166 int stmpe_reg_read(struct stmpe *stmpe, u8 reg)
 167 {
 168         int ret;
 169 
 170         mutex_lock(&stmpe->lock);
 171         ret = __stmpe_reg_read(stmpe, reg);
 172         mutex_unlock(&stmpe->lock);
 173 
 174         return ret;
 175 }
 176 EXPORT_SYMBOL_GPL(stmpe_reg_read);
 177 
 178 /**
 179  * stmpe_reg_write() - write a single STMPE register
 180  * @stmpe:      Device to write to
 181  * @reg:        Register to write
 182  * @val:        Value to write
 183  */
 184 int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
 185 {
 186         int ret;
 187 
 188         mutex_lock(&stmpe->lock);
 189         ret = __stmpe_reg_write(stmpe, reg, val);
 190         mutex_unlock(&stmpe->lock);
 191 
 192         return ret;
 193 }
 194 EXPORT_SYMBOL_GPL(stmpe_reg_write);
 195 
 196 /**
 197  * stmpe_set_bits() - set the value of a bitfield in a STMPE register
 198  * @stmpe:      Device to write to
 199  * @reg:        Register to write
 200  * @mask:       Mask of bits to set
 201  * @val:        Value to set
 202  */
 203 int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
 204 {
 205         int ret;
 206 
 207         mutex_lock(&stmpe->lock);
 208         ret = __stmpe_set_bits(stmpe, reg, mask, val);
 209         mutex_unlock(&stmpe->lock);
 210 
 211         return ret;
 212 }
 213 EXPORT_SYMBOL_GPL(stmpe_set_bits);
 214 
 215 /**
 216  * stmpe_block_read() - read multiple STMPE registers
 217  * @stmpe:      Device to read from
 218  * @reg:        First register
 219  * @length:     Number of registers
 220  * @values:     Buffer to write to
 221  */
 222 int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
 223 {
 224         int ret;
 225 
 226         mutex_lock(&stmpe->lock);
 227         ret = __stmpe_block_read(stmpe, reg, length, values);
 228         mutex_unlock(&stmpe->lock);
 229 
 230         return ret;
 231 }
 232 EXPORT_SYMBOL_GPL(stmpe_block_read);
 233 
 234 /**
 235  * stmpe_block_write() - write multiple STMPE registers
 236  * @stmpe:      Device to write to
 237  * @reg:        First register
 238  * @length:     Number of registers
 239  * @values:     Values to write
 240  */
 241 int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
 242                       const u8 *values)
 243 {
 244         int ret;
 245 
 246         mutex_lock(&stmpe->lock);
 247         ret = __stmpe_block_write(stmpe, reg, length, values);
 248         mutex_unlock(&stmpe->lock);
 249 
 250         return ret;
 251 }
 252 EXPORT_SYMBOL_GPL(stmpe_block_write);
 253 
 254 /**
 255  * stmpe_set_altfunc()- set the alternate function for STMPE pins
 256  * @stmpe:      Device to configure
 257  * @pins:       Bitmask of pins to affect
 258  * @block:      block to enable alternate functions for
 259  *
 260  * @pins is assumed to have a bit set for each of the bits whose alternate
 261  * function is to be changed, numbered according to the GPIOXY numbers.
 262  *
 263  * If the GPIO module is not enabled, this function automatically enables it in
 264  * order to perform the change.
 265  */
 266 int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block)
 267 {
 268         struct stmpe_variant_info *variant = stmpe->variant;
 269         u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];
 270         int af_bits = variant->af_bits;
 271         int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8);
 272         int mask = (1 << af_bits) - 1;
 273         u8 regs[8];
 274         int af, afperreg, ret;
 275 
 276         if (!variant->get_altfunc)
 277                 return 0;
 278 
 279         afperreg = 8 / af_bits;
 280         mutex_lock(&stmpe->lock);
 281 
 282         ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
 283         if (ret < 0)
 284                 goto out;
 285 
 286         ret = __stmpe_block_read(stmpe, regaddr, numregs, regs);
 287         if (ret < 0)
 288                 goto out;
 289 
 290         af = variant->get_altfunc(stmpe, block);
 291 
 292         while (pins) {
 293                 int pin = __ffs(pins);
 294                 int regoffset = numregs - (pin / afperreg) - 1;
 295                 int pos = (pin % afperreg) * (8 / afperreg);
 296 
 297                 regs[regoffset] &= ~(mask << pos);
 298                 regs[regoffset] |= af << pos;
 299 
 300                 pins &= ~(1 << pin);
 301         }
 302 
 303         ret = __stmpe_block_write(stmpe, regaddr, numregs, regs);
 304 
 305 out:
 306         mutex_unlock(&stmpe->lock);
 307         return ret;
 308 }
 309 EXPORT_SYMBOL_GPL(stmpe_set_altfunc);
 310 
 311 /*
 312  * GPIO (all variants)
 313  */
 314 
 315 static struct resource stmpe_gpio_resources[] = {
 316         /* Start and end filled dynamically */
 317         {
 318                 .flags  = IORESOURCE_IRQ,
 319         },
 320 };
 321 
 322 static const struct mfd_cell stmpe_gpio_cell = {
 323         .name           = "stmpe-gpio",
 324         .of_compatible  = "st,stmpe-gpio",
 325         .resources      = stmpe_gpio_resources,
 326         .num_resources  = ARRAY_SIZE(stmpe_gpio_resources),
 327 };
 328 
 329 static const struct mfd_cell stmpe_gpio_cell_noirq = {
 330         .name           = "stmpe-gpio",
 331         .of_compatible  = "st,stmpe-gpio",
 332         /* gpio cell resources consist of an irq only so no resources here */
 333 };
 334 
 335 /*
 336  * Keypad (1601, 2401, 2403)
 337  */
 338 
 339 static struct resource stmpe_keypad_resources[] = {
 340         {
 341                 .name   = "KEYPAD",
 342                 .flags  = IORESOURCE_IRQ,
 343         },
 344         {
 345                 .name   = "KEYPAD_OVER",
 346                 .flags  = IORESOURCE_IRQ,
 347         },
 348 };
 349 
 350 static const struct mfd_cell stmpe_keypad_cell = {
 351         .name           = "stmpe-keypad",
 352         .of_compatible  = "st,stmpe-keypad",
 353         .resources      = stmpe_keypad_resources,
 354         .num_resources  = ARRAY_SIZE(stmpe_keypad_resources),
 355 };
 356 
 357 /*
 358  * PWM (1601, 2401, 2403)
 359  */
 360 static struct resource stmpe_pwm_resources[] = {
 361         {
 362                 .name   = "PWM0",
 363                 .flags  = IORESOURCE_IRQ,
 364         },
 365         {
 366                 .name   = "PWM1",
 367                 .flags  = IORESOURCE_IRQ,
 368         },
 369         {
 370                 .name   = "PWM2",
 371                 .flags  = IORESOURCE_IRQ,
 372         },
 373 };
 374 
 375 static const struct mfd_cell stmpe_pwm_cell = {
 376         .name           = "stmpe-pwm",
 377         .of_compatible  = "st,stmpe-pwm",
 378         .resources      = stmpe_pwm_resources,
 379         .num_resources  = ARRAY_SIZE(stmpe_pwm_resources),
 380 };
 381 
 382 /*
 383  * STMPE801
 384  */
 385 static const u8 stmpe801_regs[] = {
 386         [STMPE_IDX_CHIP_ID]     = STMPE801_REG_CHIP_ID,
 387         [STMPE_IDX_ICR_LSB]     = STMPE801_REG_SYS_CTRL,
 388         [STMPE_IDX_GPMR_LSB]    = STMPE801_REG_GPIO_MP_STA,
 389         [STMPE_IDX_GPSR_LSB]    = STMPE801_REG_GPIO_SET_PIN,
 390         [STMPE_IDX_GPCR_LSB]    = STMPE801_REG_GPIO_SET_PIN,
 391         [STMPE_IDX_GPDR_LSB]    = STMPE801_REG_GPIO_DIR,
 392         [STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN,
 393         [STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA,
 394 
 395 };
 396 
 397 static struct stmpe_variant_block stmpe801_blocks[] = {
 398         {
 399                 .cell   = &stmpe_gpio_cell,
 400                 .irq    = 0,
 401                 .block  = STMPE_BLOCK_GPIO,
 402         },
 403 };
 404 
 405 static struct stmpe_variant_block stmpe801_blocks_noirq[] = {
 406         {
 407                 .cell   = &stmpe_gpio_cell_noirq,
 408                 .block  = STMPE_BLOCK_GPIO,
 409         },
 410 };
 411 
 412 static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks,
 413                            bool enable)
 414 {
 415         if (blocks & STMPE_BLOCK_GPIO)
 416                 return 0;
 417         else
 418                 return -EINVAL;
 419 }
 420 
 421 static struct stmpe_variant_info stmpe801 = {
 422         .name           = "stmpe801",
 423         .id_val         = STMPE801_ID,
 424         .id_mask        = 0xffff,
 425         .num_gpios      = 8,
 426         .regs           = stmpe801_regs,
 427         .blocks         = stmpe801_blocks,
 428         .num_blocks     = ARRAY_SIZE(stmpe801_blocks),
 429         .num_irqs       = STMPE801_NR_INTERNAL_IRQS,
 430         .enable         = stmpe801_enable,
 431 };
 432 
 433 static struct stmpe_variant_info stmpe801_noirq = {
 434         .name           = "stmpe801",
 435         .id_val         = STMPE801_ID,
 436         .id_mask        = 0xffff,
 437         .num_gpios      = 8,
 438         .regs           = stmpe801_regs,
 439         .blocks         = stmpe801_blocks_noirq,
 440         .num_blocks     = ARRAY_SIZE(stmpe801_blocks_noirq),
 441         .enable         = stmpe801_enable,
 442 };
 443 
 444 /*
 445  * Touchscreen (STMPE811 or STMPE610)
 446  */
 447 
 448 static struct resource stmpe_ts_resources[] = {
 449         {
 450                 .name   = "TOUCH_DET",
 451                 .flags  = IORESOURCE_IRQ,
 452         },
 453         {
 454                 .name   = "FIFO_TH",
 455                 .flags  = IORESOURCE_IRQ,
 456         },
 457 };
 458 
 459 static const struct mfd_cell stmpe_ts_cell = {
 460         .name           = "stmpe-ts",
 461         .of_compatible  = "st,stmpe-ts",
 462         .resources      = stmpe_ts_resources,
 463         .num_resources  = ARRAY_SIZE(stmpe_ts_resources),
 464 };
 465 
 466 /*
 467  * ADC (STMPE811)
 468  */
 469 
 470 static struct resource stmpe_adc_resources[] = {
 471         {
 472                 .name   = "STMPE_TEMP_SENS",
 473                 .flags  = IORESOURCE_IRQ,
 474         },
 475         {
 476                 .name   = "STMPE_ADC",
 477                 .flags  = IORESOURCE_IRQ,
 478         },
 479 };
 480 
 481 static const struct mfd_cell stmpe_adc_cell = {
 482         .name           = "stmpe-adc",
 483         .of_compatible  = "st,stmpe-adc",
 484         .resources      = stmpe_adc_resources,
 485         .num_resources  = ARRAY_SIZE(stmpe_adc_resources),
 486 };
 487 
 488 /*
 489  * STMPE811 or STMPE610
 490  */
 491 
 492 static const u8 stmpe811_regs[] = {
 493         [STMPE_IDX_CHIP_ID]     = STMPE811_REG_CHIP_ID,
 494         [STMPE_IDX_SYS_CTRL]    = STMPE811_REG_SYS_CTRL,
 495         [STMPE_IDX_SYS_CTRL2]   = STMPE811_REG_SYS_CTRL2,
 496         [STMPE_IDX_ICR_LSB]     = STMPE811_REG_INT_CTRL,
 497         [STMPE_IDX_IER_LSB]     = STMPE811_REG_INT_EN,
 498         [STMPE_IDX_ISR_MSB]     = STMPE811_REG_INT_STA,
 499         [STMPE_IDX_GPMR_LSB]    = STMPE811_REG_GPIO_MP_STA,
 500         [STMPE_IDX_GPSR_LSB]    = STMPE811_REG_GPIO_SET_PIN,
 501         [STMPE_IDX_GPCR_LSB]    = STMPE811_REG_GPIO_CLR_PIN,
 502         [STMPE_IDX_GPDR_LSB]    = STMPE811_REG_GPIO_DIR,
 503         [STMPE_IDX_GPRER_LSB]   = STMPE811_REG_GPIO_RE,
 504         [STMPE_IDX_GPFER_LSB]   = STMPE811_REG_GPIO_FE,
 505         [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
 506         [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN,
 507         [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA,
 508         [STMPE_IDX_GPEDR_LSB]   = STMPE811_REG_GPIO_ED,
 509 };
 510 
 511 static struct stmpe_variant_block stmpe811_blocks[] = {
 512         {
 513                 .cell   = &stmpe_gpio_cell,
 514                 .irq    = STMPE811_IRQ_GPIOC,
 515                 .block  = STMPE_BLOCK_GPIO,
 516         },
 517         {
 518                 .cell   = &stmpe_ts_cell,
 519                 .irq    = STMPE811_IRQ_TOUCH_DET,
 520                 .block  = STMPE_BLOCK_TOUCHSCREEN,
 521         },
 522         {
 523                 .cell   = &stmpe_adc_cell,
 524                 .irq    = STMPE811_IRQ_TEMP_SENS,
 525                 .block  = STMPE_BLOCK_ADC,
 526         },
 527 };
 528 
 529 static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
 530                            bool enable)
 531 {
 532         unsigned int mask = 0;
 533 
 534         if (blocks & STMPE_BLOCK_GPIO)
 535                 mask |= STMPE811_SYS_CTRL2_GPIO_OFF;
 536 
 537         if (blocks & STMPE_BLOCK_ADC)
 538                 mask |= STMPE811_SYS_CTRL2_ADC_OFF;
 539 
 540         if (blocks & STMPE_BLOCK_TOUCHSCREEN)
 541                 mask |= STMPE811_SYS_CTRL2_TSC_OFF;
 542 
 543         return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], mask,
 544                                 enable ? 0 : mask);
 545 }
 546 
 547 int stmpe811_adc_common_init(struct stmpe *stmpe)
 548 {
 549         int ret;
 550         u8 adc_ctrl1, adc_ctrl1_mask;
 551 
 552         adc_ctrl1 = STMPE_SAMPLE_TIME(stmpe->sample_time) |
 553                     STMPE_MOD_12B(stmpe->mod_12b) |
 554                     STMPE_REF_SEL(stmpe->ref_sel);
 555         adc_ctrl1_mask = STMPE_SAMPLE_TIME(0xff) | STMPE_MOD_12B(0xff) |
 556                          STMPE_REF_SEL(0xff);
 557 
 558         ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL1,
 559                         adc_ctrl1_mask, adc_ctrl1);
 560         if (ret) {
 561                 dev_err(stmpe->dev, "Could not setup ADC\n");
 562                 return ret;
 563         }
 564 
 565         ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL2,
 566                         STMPE_ADC_FREQ(0xff), STMPE_ADC_FREQ(stmpe->adc_freq));
 567         if (ret) {
 568                 dev_err(stmpe->dev, "Could not setup ADC\n");
 569                 return ret;
 570         }
 571 
 572         return 0;
 573 }
 574 EXPORT_SYMBOL_GPL(stmpe811_adc_common_init);
 575 
 576 static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
 577 {
 578         /* 0 for touchscreen, 1 for GPIO */
 579         return block != STMPE_BLOCK_TOUCHSCREEN;
 580 }
 581 
 582 static struct stmpe_variant_info stmpe811 = {
 583         .name           = "stmpe811",
 584         .id_val         = 0x0811,
 585         .id_mask        = 0xffff,
 586         .num_gpios      = 8,
 587         .af_bits        = 1,
 588         .regs           = stmpe811_regs,
 589         .blocks         = stmpe811_blocks,
 590         .num_blocks     = ARRAY_SIZE(stmpe811_blocks),
 591         .num_irqs       = STMPE811_NR_INTERNAL_IRQS,
 592         .enable         = stmpe811_enable,
 593         .get_altfunc    = stmpe811_get_altfunc,
 594 };
 595 
 596 /* Similar to 811, except number of gpios */
 597 static struct stmpe_variant_info stmpe610 = {
 598         .name           = "stmpe610",
 599         .id_val         = 0x0811,
 600         .id_mask        = 0xffff,
 601         .num_gpios      = 6,
 602         .af_bits        = 1,
 603         .regs           = stmpe811_regs,
 604         .blocks         = stmpe811_blocks,
 605         .num_blocks     = ARRAY_SIZE(stmpe811_blocks),
 606         .num_irqs       = STMPE811_NR_INTERNAL_IRQS,
 607         .enable         = stmpe811_enable,
 608         .get_altfunc    = stmpe811_get_altfunc,
 609 };
 610 
 611 /*
 612  * STMPE1600
 613  * Compared to all others STMPE variant, LSB and MSB regs are located in this
 614  * order :      LSB   addr
 615  *              MSB   addr + 1
 616  * As there is only 2 * 8bits registers for GPMR/GPSR/IEGPIOPR, CSB index is MSB registers
 617  */
 618 
 619 static const u8 stmpe1600_regs[] = {
 620         [STMPE_IDX_CHIP_ID]     = STMPE1600_REG_CHIP_ID,
 621         [STMPE_IDX_SYS_CTRL]    = STMPE1600_REG_SYS_CTRL,
 622         [STMPE_IDX_ICR_LSB]     = STMPE1600_REG_SYS_CTRL,
 623         [STMPE_IDX_GPMR_LSB]    = STMPE1600_REG_GPMR_LSB,
 624         [STMPE_IDX_GPMR_CSB]    = STMPE1600_REG_GPMR_MSB,
 625         [STMPE_IDX_GPSR_LSB]    = STMPE1600_REG_GPSR_LSB,
 626         [STMPE_IDX_GPSR_CSB]    = STMPE1600_REG_GPSR_MSB,
 627         [STMPE_IDX_GPCR_LSB]    = STMPE1600_REG_GPSR_LSB,
 628         [STMPE_IDX_GPCR_CSB]    = STMPE1600_REG_GPSR_MSB,
 629         [STMPE_IDX_GPDR_LSB]    = STMPE1600_REG_GPDR_LSB,
 630         [STMPE_IDX_GPDR_CSB]    = STMPE1600_REG_GPDR_MSB,
 631         [STMPE_IDX_IEGPIOR_LSB] = STMPE1600_REG_IEGPIOR_LSB,
 632         [STMPE_IDX_IEGPIOR_CSB] = STMPE1600_REG_IEGPIOR_MSB,
 633         [STMPE_IDX_ISGPIOR_LSB] = STMPE1600_REG_ISGPIOR_LSB,
 634 };
 635 
 636 static struct stmpe_variant_block stmpe1600_blocks[] = {
 637         {
 638                 .cell   = &stmpe_gpio_cell,
 639                 .irq    = 0,
 640                 .block  = STMPE_BLOCK_GPIO,
 641         },
 642 };
 643 
 644 static int stmpe1600_enable(struct stmpe *stmpe, unsigned int blocks,
 645                            bool enable)
 646 {
 647         if (blocks & STMPE_BLOCK_GPIO)
 648                 return 0;
 649         else
 650                 return -EINVAL;
 651 }
 652 
 653 static struct stmpe_variant_info stmpe1600 = {
 654         .name           = "stmpe1600",
 655         .id_val         = STMPE1600_ID,
 656         .id_mask        = 0xffff,
 657         .num_gpios      = 16,
 658         .af_bits        = 0,
 659         .regs           = stmpe1600_regs,
 660         .blocks         = stmpe1600_blocks,
 661         .num_blocks     = ARRAY_SIZE(stmpe1600_blocks),
 662         .num_irqs       = STMPE1600_NR_INTERNAL_IRQS,
 663         .enable         = stmpe1600_enable,
 664 };
 665 
 666 /*
 667  * STMPE1601
 668  */
 669 
 670 static const u8 stmpe1601_regs[] = {
 671         [STMPE_IDX_CHIP_ID]     = STMPE1601_REG_CHIP_ID,
 672         [STMPE_IDX_SYS_CTRL]    = STMPE1601_REG_SYS_CTRL,
 673         [STMPE_IDX_SYS_CTRL2]   = STMPE1601_REG_SYS_CTRL2,
 674         [STMPE_IDX_ICR_LSB]     = STMPE1601_REG_ICR_LSB,
 675         [STMPE_IDX_IER_MSB]     = STMPE1601_REG_IER_MSB,
 676         [STMPE_IDX_IER_LSB]     = STMPE1601_REG_IER_LSB,
 677         [STMPE_IDX_ISR_MSB]     = STMPE1601_REG_ISR_MSB,
 678         [STMPE_IDX_GPMR_LSB]    = STMPE1601_REG_GPIO_MP_LSB,
 679         [STMPE_IDX_GPMR_CSB]    = STMPE1601_REG_GPIO_MP_MSB,
 680         [STMPE_IDX_GPSR_LSB]    = STMPE1601_REG_GPIO_SET_LSB,
 681         [STMPE_IDX_GPSR_CSB]    = STMPE1601_REG_GPIO_SET_MSB,
 682         [STMPE_IDX_GPCR_LSB]    = STMPE1601_REG_GPIO_CLR_LSB,
 683         [STMPE_IDX_GPCR_CSB]    = STMPE1601_REG_GPIO_CLR_MSB,
 684         [STMPE_IDX_GPDR_LSB]    = STMPE1601_REG_GPIO_SET_DIR_LSB,
 685         [STMPE_IDX_GPDR_CSB]    = STMPE1601_REG_GPIO_SET_DIR_MSB,
 686         [STMPE_IDX_GPEDR_LSB]   = STMPE1601_REG_GPIO_ED_LSB,
 687         [STMPE_IDX_GPEDR_CSB]   = STMPE1601_REG_GPIO_ED_MSB,
 688         [STMPE_IDX_GPRER_LSB]   = STMPE1601_REG_GPIO_RE_LSB,
 689         [STMPE_IDX_GPRER_CSB]   = STMPE1601_REG_GPIO_RE_MSB,
 690         [STMPE_IDX_GPFER_LSB]   = STMPE1601_REG_GPIO_FE_LSB,
 691         [STMPE_IDX_GPFER_CSB]   = STMPE1601_REG_GPIO_FE_MSB,
 692         [STMPE_IDX_GPPUR_LSB]   = STMPE1601_REG_GPIO_PU_LSB,
 693         [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB,
 694         [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB,
 695         [STMPE_IDX_IEGPIOR_CSB] = STMPE1601_REG_INT_EN_GPIO_MASK_MSB,
 696         [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB,
 697 };
 698 
 699 static struct stmpe_variant_block stmpe1601_blocks[] = {
 700         {
 701                 .cell   = &stmpe_gpio_cell,
 702                 .irq    = STMPE1601_IRQ_GPIOC,
 703                 .block  = STMPE_BLOCK_GPIO,
 704         },
 705         {
 706                 .cell   = &stmpe_keypad_cell,
 707                 .irq    = STMPE1601_IRQ_KEYPAD,
 708                 .block  = STMPE_BLOCK_KEYPAD,
 709         },
 710         {
 711                 .cell   = &stmpe_pwm_cell,
 712                 .irq    = STMPE1601_IRQ_PWM0,
 713                 .block  = STMPE_BLOCK_PWM,
 714         },
 715 };
 716 
 717 /* supported autosleep timeout delay (in msecs) */
 718 static const int stmpe_autosleep_delay[] = {
 719         4, 16, 32, 64, 128, 256, 512, 1024,
 720 };
 721 
 722 static int stmpe_round_timeout(int timeout)
 723 {
 724         int i;
 725 
 726         for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) {
 727                 if (stmpe_autosleep_delay[i] >= timeout)
 728                         return i;
 729         }
 730 
 731         /*
 732          * requests for delays longer than supported should not return the
 733          * longest supported delay
 734          */
 735         return -EINVAL;
 736 }
 737 
 738 static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout)
 739 {
 740         int ret;
 741 
 742         if (!stmpe->variant->enable_autosleep)
 743                 return -ENOSYS;
 744 
 745         mutex_lock(&stmpe->lock);
 746         ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout);
 747         mutex_unlock(&stmpe->lock);
 748 
 749         return ret;
 750 }
 751 
 752 /*
 753  * Both stmpe 1601/2403 support same layout for autosleep
 754  */
 755 static int stmpe1601_autosleep(struct stmpe *stmpe,
 756                 int autosleep_timeout)
 757 {
 758         int ret, timeout;
 759 
 760         /* choose the best available timeout */
 761         timeout = stmpe_round_timeout(autosleep_timeout);
 762         if (timeout < 0) {
 763                 dev_err(stmpe->dev, "invalid timeout\n");
 764                 return timeout;
 765         }
 766 
 767         ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2],
 768                         STMPE1601_AUTOSLEEP_TIMEOUT_MASK,
 769                         timeout);
 770         if (ret < 0)
 771                 return ret;
 772 
 773         return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2],
 774                         STPME1601_AUTOSLEEP_ENABLE,
 775                         STPME1601_AUTOSLEEP_ENABLE);
 776 }
 777 
 778 static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks,
 779                             bool enable)
 780 {
 781         unsigned int mask = 0;
 782 
 783         if (blocks & STMPE_BLOCK_GPIO)
 784                 mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO;
 785         else
 786                 mask &= ~STMPE1601_SYS_CTRL_ENABLE_GPIO;
 787 
 788         if (blocks & STMPE_BLOCK_KEYPAD)
 789                 mask |= STMPE1601_SYS_CTRL_ENABLE_KPC;
 790         else
 791                 mask &= ~STMPE1601_SYS_CTRL_ENABLE_KPC;
 792 
 793         if (blocks & STMPE_BLOCK_PWM)
 794                 mask |= STMPE1601_SYS_CTRL_ENABLE_SPWM;
 795         else
 796                 mask &= ~STMPE1601_SYS_CTRL_ENABLE_SPWM;
 797 
 798         return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask,
 799                                 enable ? mask : 0);
 800 }
 801 
 802 static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
 803 {
 804         switch (block) {
 805         case STMPE_BLOCK_PWM:
 806                 return 2;
 807 
 808         case STMPE_BLOCK_KEYPAD:
 809                 return 1;
 810 
 811         case STMPE_BLOCK_GPIO:
 812         default:
 813                 return 0;
 814         }
 815 }
 816 
 817 static struct stmpe_variant_info stmpe1601 = {
 818         .name           = "stmpe1601",
 819         .id_val         = 0x0210,
 820         .id_mask        = 0xfff0,       /* at least 0x0210 and 0x0212 */
 821         .num_gpios      = 16,
 822         .af_bits        = 2,
 823         .regs           = stmpe1601_regs,
 824         .blocks         = stmpe1601_blocks,
 825         .num_blocks     = ARRAY_SIZE(stmpe1601_blocks),
 826         .num_irqs       = STMPE1601_NR_INTERNAL_IRQS,
 827         .enable         = stmpe1601_enable,
 828         .get_altfunc    = stmpe1601_get_altfunc,
 829         .enable_autosleep       = stmpe1601_autosleep,
 830 };
 831 
 832 /*
 833  * STMPE1801
 834  */
 835 static const u8 stmpe1801_regs[] = {
 836         [STMPE_IDX_CHIP_ID]     = STMPE1801_REG_CHIP_ID,
 837         [STMPE_IDX_SYS_CTRL]    = STMPE1801_REG_SYS_CTRL,
 838         [STMPE_IDX_ICR_LSB]     = STMPE1801_REG_INT_CTRL_LOW,
 839         [STMPE_IDX_IER_LSB]     = STMPE1801_REG_INT_EN_MASK_LOW,
 840         [STMPE_IDX_ISR_LSB]     = STMPE1801_REG_INT_STA_LOW,
 841         [STMPE_IDX_GPMR_LSB]    = STMPE1801_REG_GPIO_MP_LOW,
 842         [STMPE_IDX_GPMR_CSB]    = STMPE1801_REG_GPIO_MP_MID,
 843         [STMPE_IDX_GPMR_MSB]    = STMPE1801_REG_GPIO_MP_HIGH,
 844         [STMPE_IDX_GPSR_LSB]    = STMPE1801_REG_GPIO_SET_LOW,
 845         [STMPE_IDX_GPSR_CSB]    = STMPE1801_REG_GPIO_SET_MID,
 846         [STMPE_IDX_GPSR_MSB]    = STMPE1801_REG_GPIO_SET_HIGH,
 847         [STMPE_IDX_GPCR_LSB]    = STMPE1801_REG_GPIO_CLR_LOW,
 848         [STMPE_IDX_GPCR_CSB]    = STMPE1801_REG_GPIO_CLR_MID,
 849         [STMPE_IDX_GPCR_MSB]    = STMPE1801_REG_GPIO_CLR_HIGH,
 850         [STMPE_IDX_GPDR_LSB]    = STMPE1801_REG_GPIO_SET_DIR_LOW,
 851         [STMPE_IDX_GPDR_CSB]    = STMPE1801_REG_GPIO_SET_DIR_MID,
 852         [STMPE_IDX_GPDR_MSB]    = STMPE1801_REG_GPIO_SET_DIR_HIGH,
 853         [STMPE_IDX_GPRER_LSB]   = STMPE1801_REG_GPIO_RE_LOW,
 854         [STMPE_IDX_GPRER_CSB]   = STMPE1801_REG_GPIO_RE_MID,
 855         [STMPE_IDX_GPRER_MSB]   = STMPE1801_REG_GPIO_RE_HIGH,
 856         [STMPE_IDX_GPFER_LSB]   = STMPE1801_REG_GPIO_FE_LOW,
 857         [STMPE_IDX_GPFER_CSB]   = STMPE1801_REG_GPIO_FE_MID,
 858         [STMPE_IDX_GPFER_MSB]   = STMPE1801_REG_GPIO_FE_HIGH,
 859         [STMPE_IDX_GPPUR_LSB]   = STMPE1801_REG_GPIO_PULL_UP_LOW,
 860         [STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW,
 861         [STMPE_IDX_IEGPIOR_CSB] = STMPE1801_REG_INT_EN_GPIO_MASK_MID,
 862         [STMPE_IDX_IEGPIOR_MSB] = STMPE1801_REG_INT_EN_GPIO_MASK_HIGH,
 863         [STMPE_IDX_ISGPIOR_MSB] = STMPE1801_REG_INT_STA_GPIO_HIGH,
 864 };
 865 
 866 static struct stmpe_variant_block stmpe1801_blocks[] = {
 867         {
 868                 .cell   = &stmpe_gpio_cell,
 869                 .irq    = STMPE1801_IRQ_GPIOC,
 870                 .block  = STMPE_BLOCK_GPIO,
 871         },
 872         {
 873                 .cell   = &stmpe_keypad_cell,
 874                 .irq    = STMPE1801_IRQ_KEYPAD,
 875                 .block  = STMPE_BLOCK_KEYPAD,
 876         },
 877 };
 878 
 879 static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks,
 880                             bool enable)
 881 {
 882         unsigned int mask = 0;
 883         if (blocks & STMPE_BLOCK_GPIO)
 884                 mask |= STMPE1801_MSK_INT_EN_GPIO;
 885 
 886         if (blocks & STMPE_BLOCK_KEYPAD)
 887                 mask |= STMPE1801_MSK_INT_EN_KPC;
 888 
 889         return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask,
 890                                 enable ? mask : 0);
 891 }
 892 
 893 static int stmpe_reset(struct stmpe *stmpe)
 894 {
 895         u16 id_val = stmpe->variant->id_val;
 896         unsigned long timeout;
 897         int ret = 0;
 898         u8 reset_bit;
 899 
 900         if (id_val == STMPE811_ID)
 901                 /* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */
 902                 reset_bit = STMPE811_SYS_CTRL_RESET;
 903         else
 904                 /* all other STMPE variant use bit 7 of SYS_CTRL register */
 905                 reset_bit = STMPE_SYS_CTRL_RESET;
 906 
 907         ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL],
 908                                reset_bit, reset_bit);
 909         if (ret < 0)
 910                 return ret;
 911 
 912         msleep(10);
 913 
 914         timeout = jiffies + msecs_to_jiffies(100);
 915         while (time_before(jiffies, timeout)) {
 916                 ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]);
 917                 if (ret < 0)
 918                         return ret;
 919                 if (!(ret & reset_bit))
 920                         return 0;
 921                 usleep_range(100, 200);
 922         }
 923         return -EIO;
 924 }
 925 
 926 static struct stmpe_variant_info stmpe1801 = {
 927         .name           = "stmpe1801",
 928         .id_val         = STMPE1801_ID,
 929         .id_mask        = 0xfff0,
 930         .num_gpios      = 18,
 931         .af_bits        = 0,
 932         .regs           = stmpe1801_regs,
 933         .blocks         = stmpe1801_blocks,
 934         .num_blocks     = ARRAY_SIZE(stmpe1801_blocks),
 935         .num_irqs       = STMPE1801_NR_INTERNAL_IRQS,
 936         .enable         = stmpe1801_enable,
 937         /* stmpe1801 do not have any gpio alternate function */
 938         .get_altfunc    = NULL,
 939 };
 940 
 941 /*
 942  * STMPE24XX
 943  */
 944 
 945 static const u8 stmpe24xx_regs[] = {
 946         [STMPE_IDX_CHIP_ID]     = STMPE24XX_REG_CHIP_ID,
 947         [STMPE_IDX_SYS_CTRL]    = STMPE24XX_REG_SYS_CTRL,
 948         [STMPE_IDX_SYS_CTRL2]   = STMPE24XX_REG_SYS_CTRL2,
 949         [STMPE_IDX_ICR_LSB]     = STMPE24XX_REG_ICR_LSB,
 950         [STMPE_IDX_IER_MSB]     = STMPE24XX_REG_IER_MSB,
 951         [STMPE_IDX_IER_LSB]     = STMPE24XX_REG_IER_LSB,
 952         [STMPE_IDX_ISR_MSB]     = STMPE24XX_REG_ISR_MSB,
 953         [STMPE_IDX_GPMR_LSB]    = STMPE24XX_REG_GPMR_LSB,
 954         [STMPE_IDX_GPMR_CSB]    = STMPE24XX_REG_GPMR_CSB,
 955         [STMPE_IDX_GPMR_MSB]    = STMPE24XX_REG_GPMR_MSB,
 956         [STMPE_IDX_GPSR_LSB]    = STMPE24XX_REG_GPSR_LSB,
 957         [STMPE_IDX_GPSR_CSB]    = STMPE24XX_REG_GPSR_CSB,
 958         [STMPE_IDX_GPSR_MSB]    = STMPE24XX_REG_GPSR_MSB,
 959         [STMPE_IDX_GPCR_LSB]    = STMPE24XX_REG_GPCR_LSB,
 960         [STMPE_IDX_GPCR_CSB]    = STMPE24XX_REG_GPCR_CSB,
 961         [STMPE_IDX_GPCR_MSB]    = STMPE24XX_REG_GPCR_MSB,
 962         [STMPE_IDX_GPDR_LSB]    = STMPE24XX_REG_GPDR_LSB,
 963         [STMPE_IDX_GPDR_CSB]    = STMPE24XX_REG_GPDR_CSB,
 964         [STMPE_IDX_GPDR_MSB]    = STMPE24XX_REG_GPDR_MSB,
 965         [STMPE_IDX_GPRER_LSB]   = STMPE24XX_REG_GPRER_LSB,
 966         [STMPE_IDX_GPRER_CSB]   = STMPE24XX_REG_GPRER_CSB,
 967         [STMPE_IDX_GPRER_MSB]   = STMPE24XX_REG_GPRER_MSB,
 968         [STMPE_IDX_GPFER_LSB]   = STMPE24XX_REG_GPFER_LSB,
 969         [STMPE_IDX_GPFER_CSB]   = STMPE24XX_REG_GPFER_CSB,
 970         [STMPE_IDX_GPFER_MSB]   = STMPE24XX_REG_GPFER_MSB,
 971         [STMPE_IDX_GPPUR_LSB]   = STMPE24XX_REG_GPPUR_LSB,
 972         [STMPE_IDX_GPPDR_LSB]   = STMPE24XX_REG_GPPDR_LSB,
 973         [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB,
 974         [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB,
 975         [STMPE_IDX_IEGPIOR_CSB] = STMPE24XX_REG_IEGPIOR_CSB,
 976         [STMPE_IDX_IEGPIOR_MSB] = STMPE24XX_REG_IEGPIOR_MSB,
 977         [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB,
 978         [STMPE_IDX_GPEDR_LSB]   = STMPE24XX_REG_GPEDR_LSB,
 979         [STMPE_IDX_GPEDR_CSB]   = STMPE24XX_REG_GPEDR_CSB,
 980         [STMPE_IDX_GPEDR_MSB]   = STMPE24XX_REG_GPEDR_MSB,
 981 };
 982 
 983 static struct stmpe_variant_block stmpe24xx_blocks[] = {
 984         {
 985                 .cell   = &stmpe_gpio_cell,
 986                 .irq    = STMPE24XX_IRQ_GPIOC,
 987                 .block  = STMPE_BLOCK_GPIO,
 988         },
 989         {
 990                 .cell   = &stmpe_keypad_cell,
 991                 .irq    = STMPE24XX_IRQ_KEYPAD,
 992                 .block  = STMPE_BLOCK_KEYPAD,
 993         },
 994         {
 995                 .cell   = &stmpe_pwm_cell,
 996                 .irq    = STMPE24XX_IRQ_PWM0,
 997                 .block  = STMPE_BLOCK_PWM,
 998         },
 999 };
1000 
1001 static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks,
1002                             bool enable)
1003 {
1004         unsigned int mask = 0;
1005 
1006         if (blocks & STMPE_BLOCK_GPIO)
1007                 mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO;
1008 
1009         if (blocks & STMPE_BLOCK_KEYPAD)
1010                 mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC;
1011 
1012         return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask,
1013                                 enable ? mask : 0);
1014 }
1015 
1016 static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
1017 {
1018         switch (block) {
1019         case STMPE_BLOCK_ROTATOR:
1020                 return 2;
1021 
1022         case STMPE_BLOCK_KEYPAD:
1023         case STMPE_BLOCK_PWM:
1024                 return 1;
1025 
1026         case STMPE_BLOCK_GPIO:
1027         default:
1028                 return 0;
1029         }
1030 }
1031 
1032 static struct stmpe_variant_info stmpe2401 = {
1033         .name           = "stmpe2401",
1034         .id_val         = 0x0101,
1035         .id_mask        = 0xffff,
1036         .num_gpios      = 24,
1037         .af_bits        = 2,
1038         .regs           = stmpe24xx_regs,
1039         .blocks         = stmpe24xx_blocks,
1040         .num_blocks     = ARRAY_SIZE(stmpe24xx_blocks),
1041         .num_irqs       = STMPE24XX_NR_INTERNAL_IRQS,
1042         .enable         = stmpe24xx_enable,
1043         .get_altfunc    = stmpe24xx_get_altfunc,
1044 };
1045 
1046 static struct stmpe_variant_info stmpe2403 = {
1047         .name           = "stmpe2403",
1048         .id_val         = 0x0120,
1049         .id_mask        = 0xffff,
1050         .num_gpios      = 24,
1051         .af_bits        = 2,
1052         .regs           = stmpe24xx_regs,
1053         .blocks         = stmpe24xx_blocks,
1054         .num_blocks     = ARRAY_SIZE(stmpe24xx_blocks),
1055         .num_irqs       = STMPE24XX_NR_INTERNAL_IRQS,
1056         .enable         = stmpe24xx_enable,
1057         .get_altfunc    = stmpe24xx_get_altfunc,
1058         .enable_autosleep       = stmpe1601_autosleep, /* same as stmpe1601 */
1059 };
1060 
1061 static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
1062         [STMPE610]      = &stmpe610,
1063         [STMPE801]      = &stmpe801,
1064         [STMPE811]      = &stmpe811,
1065         [STMPE1600]     = &stmpe1600,
1066         [STMPE1601]     = &stmpe1601,
1067         [STMPE1801]     = &stmpe1801,
1068         [STMPE2401]     = &stmpe2401,
1069         [STMPE2403]     = &stmpe2403,
1070 };
1071 
1072 /*
1073  * These devices can be connected in a 'no-irq' configuration - the irq pin
1074  * is not used and the device cannot interrupt the CPU. Here we only list
1075  * devices which support this configuration - the driver will fail probing
1076  * for any devices not listed here which are configured in this way.
1077  */
1078 static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = {
1079         [STMPE801]      = &stmpe801_noirq,
1080 };
1081 
1082 static irqreturn_t stmpe_irq(int irq, void *data)
1083 {
1084         struct stmpe *stmpe = data;
1085         struct stmpe_variant_info *variant = stmpe->variant;
1086         int num = DIV_ROUND_UP(variant->num_irqs, 8);
1087         u8 israddr;
1088         u8 isr[3];
1089         int ret;
1090         int i;
1091 
1092         if (variant->id_val == STMPE801_ID ||
1093             variant->id_val == STMPE1600_ID) {
1094                 int base = irq_create_mapping(stmpe->domain, 0);
1095 
1096                 handle_nested_irq(base);
1097                 return IRQ_HANDLED;
1098         }
1099 
1100         if (variant->id_val == STMPE1801_ID)
1101                 israddr = stmpe->regs[STMPE_IDX_ISR_LSB];
1102         else
1103                 israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
1104 
1105         ret = stmpe_block_read(stmpe, israddr, num, isr);
1106         if (ret < 0)
1107                 return IRQ_NONE;
1108 
1109         for (i = 0; i < num; i++) {
1110                 int bank = num - i - 1;
1111                 u8 status = isr[i];
1112                 u8 clear;
1113 
1114                 status &= stmpe->ier[bank];
1115                 if (!status)
1116                         continue;
1117 
1118                 clear = status;
1119                 while (status) {
1120                         int bit = __ffs(status);
1121                         int line = bank * 8 + bit;
1122                         int nestedirq = irq_create_mapping(stmpe->domain, line);
1123 
1124                         handle_nested_irq(nestedirq);
1125                         status &= ~(1 << bit);
1126                 }
1127 
1128                 stmpe_reg_write(stmpe, israddr + i, clear);
1129         }
1130 
1131         return IRQ_HANDLED;
1132 }
1133 
1134 static void stmpe_irq_lock(struct irq_data *data)
1135 {
1136         struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1137 
1138         mutex_lock(&stmpe->irq_lock);
1139 }
1140 
1141 static void stmpe_irq_sync_unlock(struct irq_data *data)
1142 {
1143         struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1144         struct stmpe_variant_info *variant = stmpe->variant;
1145         int num = DIV_ROUND_UP(variant->num_irqs, 8);
1146         int i;
1147 
1148         for (i = 0; i < num; i++) {
1149                 u8 new = stmpe->ier[i];
1150                 u8 old = stmpe->oldier[i];
1151 
1152                 if (new == old)
1153                         continue;
1154 
1155                 stmpe->oldier[i] = new;
1156                 stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB + i], new);
1157         }
1158 
1159         mutex_unlock(&stmpe->irq_lock);
1160 }
1161 
1162 static void stmpe_irq_mask(struct irq_data *data)
1163 {
1164         struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1165         int offset = data->hwirq;
1166         int regoffset = offset / 8;
1167         int mask = 1 << (offset % 8);
1168 
1169         stmpe->ier[regoffset] &= ~mask;
1170 }
1171 
1172 static void stmpe_irq_unmask(struct irq_data *data)
1173 {
1174         struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1175         int offset = data->hwirq;
1176         int regoffset = offset / 8;
1177         int mask = 1 << (offset % 8);
1178 
1179         stmpe->ier[regoffset] |= mask;
1180 }
1181 
1182 static struct irq_chip stmpe_irq_chip = {
1183         .name                   = "stmpe",
1184         .irq_bus_lock           = stmpe_irq_lock,
1185         .irq_bus_sync_unlock    = stmpe_irq_sync_unlock,
1186         .irq_mask               = stmpe_irq_mask,
1187         .irq_unmask             = stmpe_irq_unmask,
1188 };
1189 
1190 static int stmpe_irq_map(struct irq_domain *d, unsigned int virq,
1191                                 irq_hw_number_t hwirq)
1192 {
1193         struct stmpe *stmpe = d->host_data;
1194         struct irq_chip *chip = NULL;
1195 
1196         if (stmpe->variant->id_val != STMPE801_ID)
1197                 chip = &stmpe_irq_chip;
1198 
1199         irq_set_chip_data(virq, stmpe);
1200         irq_set_chip_and_handler(virq, chip, handle_edge_irq);
1201         irq_set_nested_thread(virq, 1);
1202         irq_set_noprobe(virq);
1203 
1204         return 0;
1205 }
1206 
1207 static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq)
1208 {
1209                 irq_set_chip_and_handler(virq, NULL, NULL);
1210                 irq_set_chip_data(virq, NULL);
1211 }
1212 
1213 static const struct irq_domain_ops stmpe_irq_ops = {
1214         .map    = stmpe_irq_map,
1215         .unmap  = stmpe_irq_unmap,
1216         .xlate  = irq_domain_xlate_twocell,
1217 };
1218 
1219 static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np)
1220 {
1221         int base = 0;
1222         int num_irqs = stmpe->variant->num_irqs;
1223 
1224         stmpe->domain = irq_domain_add_simple(np, num_irqs, base,
1225                                               &stmpe_irq_ops, stmpe);
1226         if (!stmpe->domain) {
1227                 dev_err(stmpe->dev, "Failed to create irqdomain\n");
1228                 return -ENOSYS;
1229         }
1230 
1231         return 0;
1232 }
1233 
1234 static int stmpe_chip_init(struct stmpe *stmpe)
1235 {
1236         unsigned int irq_trigger = stmpe->pdata->irq_trigger;
1237         int autosleep_timeout = stmpe->pdata->autosleep_timeout;
1238         struct stmpe_variant_info *variant = stmpe->variant;
1239         u8 icr = 0;
1240         unsigned int id;
1241         u8 data[2];
1242         int ret;
1243 
1244         ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID],
1245                                ARRAY_SIZE(data), data);
1246         if (ret < 0)
1247                 return ret;
1248 
1249         id = (data[0] << 8) | data[1];
1250         if ((id & variant->id_mask) != variant->id_val) {
1251                 dev_err(stmpe->dev, "unknown chip id: %#x\n", id);
1252                 return -EINVAL;
1253         }
1254 
1255         dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id);
1256 
1257         /* Disable all modules -- subdrivers should enable what they need. */
1258         ret = stmpe_disable(stmpe, ~0);
1259         if (ret)
1260                 return ret;
1261 
1262         ret =  stmpe_reset(stmpe);
1263         if (ret < 0)
1264                 return ret;
1265 
1266         if (stmpe->irq >= 0) {
1267                 if (id == STMPE801_ID || id == STMPE1600_ID)
1268                         icr = STMPE_SYS_CTRL_INT_EN;
1269                 else
1270                         icr = STMPE_ICR_LSB_GIM;
1271 
1272                 /* STMPE801 and STMPE1600 don't support Edge interrupts */
1273                 if (id != STMPE801_ID && id != STMPE1600_ID) {
1274                         if (irq_trigger == IRQF_TRIGGER_FALLING ||
1275                                         irq_trigger == IRQF_TRIGGER_RISING)
1276                                 icr |= STMPE_ICR_LSB_EDGE;
1277                 }
1278 
1279                 if (irq_trigger == IRQF_TRIGGER_RISING ||
1280                                 irq_trigger == IRQF_TRIGGER_HIGH) {
1281                         if (id == STMPE801_ID || id == STMPE1600_ID)
1282                                 icr |= STMPE_SYS_CTRL_INT_HI;
1283                         else
1284                                 icr |= STMPE_ICR_LSB_HIGH;
1285                 }
1286         }
1287 
1288         if (stmpe->pdata->autosleep) {
1289                 ret = stmpe_autosleep(stmpe, autosleep_timeout);
1290                 if (ret)
1291                         return ret;
1292         }
1293 
1294         return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);
1295 }
1296 
1297 static int stmpe_add_device(struct stmpe *stmpe, const struct mfd_cell *cell)
1298 {
1299         return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,
1300                                NULL, 0, stmpe->domain);
1301 }
1302 
1303 static int stmpe_devices_init(struct stmpe *stmpe)
1304 {
1305         struct stmpe_variant_info *variant = stmpe->variant;
1306         unsigned int platform_blocks = stmpe->pdata->blocks;
1307         int ret = -EINVAL;
1308         int i, j;
1309 
1310         for (i = 0; i < variant->num_blocks; i++) {
1311                 struct stmpe_variant_block *block = &variant->blocks[i];
1312 
1313                 if (!(platform_blocks & block->block))
1314                         continue;
1315 
1316                 for (j = 0; j < block->cell->num_resources; j++) {
1317                         struct resource *res =
1318                                 (struct resource *) &block->cell->resources[j];
1319 
1320                         /* Dynamically fill in a variant's IRQ. */
1321                         if (res->flags & IORESOURCE_IRQ)
1322                                 res->start = res->end = block->irq + j;
1323                 }
1324 
1325                 platform_blocks &= ~block->block;
1326                 ret = stmpe_add_device(stmpe, block->cell);
1327                 if (ret)
1328                         return ret;
1329         }
1330 
1331         if (platform_blocks)
1332                 dev_warn(stmpe->dev,
1333                          "platform wants blocks (%#x) not present on variant",
1334                          platform_blocks);
1335 
1336         return ret;
1337 }
1338 
1339 static void stmpe_of_probe(struct stmpe_platform_data *pdata,
1340                            struct device_node *np)
1341 {
1342         struct device_node *child;
1343 
1344         pdata->id = of_alias_get_id(np, "stmpe-i2c");
1345         if (pdata->id < 0)
1346                 pdata->id = -1;
1347 
1348         pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
1349                                 &pdata->irq_trigger);
1350         if (gpio_is_valid(pdata->irq_gpio))
1351                 pdata->irq_over_gpio = 1;
1352         else
1353                 pdata->irq_trigger = IRQF_TRIGGER_NONE;
1354 
1355         of_property_read_u32(np, "st,autosleep-timeout",
1356                         &pdata->autosleep_timeout);
1357 
1358         pdata->autosleep = (pdata->autosleep_timeout) ? true : false;
1359 
1360         for_each_child_of_node(np, child) {
1361                 if (of_node_name_eq(child, "stmpe_gpio")) {
1362                         pdata->blocks |= STMPE_BLOCK_GPIO;
1363                 } else if (of_node_name_eq(child, "stmpe_keypad")) {
1364                         pdata->blocks |= STMPE_BLOCK_KEYPAD;
1365                 } else if (of_node_name_eq(child, "stmpe_touchscreen")) {
1366                         pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;
1367                 } else if (of_node_name_eq(child, "stmpe_adc")) {
1368                         pdata->blocks |= STMPE_BLOCK_ADC;
1369                 } else if (of_node_name_eq(child, "stmpe_pwm")) {
1370                         pdata->blocks |= STMPE_BLOCK_PWM;
1371                 } else if (of_node_name_eq(child, "stmpe_rotator")) {
1372                         pdata->blocks |= STMPE_BLOCK_ROTATOR;
1373                 }
1374         }
1375 }
1376 
1377 /* Called from client specific probe routines */
1378 int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
1379 {
1380         struct stmpe_platform_data *pdata;
1381         struct device_node *np = ci->dev->of_node;
1382         struct stmpe *stmpe;
1383         int ret;
1384         u32 val;
1385 
1386         pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);
1387         if (!pdata)
1388                 return -ENOMEM;
1389 
1390         stmpe_of_probe(pdata, np);
1391 
1392         if (of_find_property(np, "interrupts", NULL) == NULL)
1393                 ci->irq = -1;
1394 
1395         stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);
1396         if (!stmpe)
1397                 return -ENOMEM;
1398 
1399         mutex_init(&stmpe->irq_lock);
1400         mutex_init(&stmpe->lock);
1401 
1402         if (!of_property_read_u32(np, "st,sample-time", &val))
1403                 stmpe->sample_time = val;
1404         if (!of_property_read_u32(np, "st,mod-12b", &val))
1405                 stmpe->mod_12b = val;
1406         if (!of_property_read_u32(np, "st,ref-sel", &val))
1407                 stmpe->ref_sel = val;
1408         if (!of_property_read_u32(np, "st,adc-freq", &val))
1409                 stmpe->adc_freq = val;
1410 
1411         stmpe->dev = ci->dev;
1412         stmpe->client = ci->client;
1413         stmpe->pdata = pdata;
1414         stmpe->ci = ci;
1415         stmpe->partnum = partnum;
1416         stmpe->variant = stmpe_variant_info[partnum];
1417         stmpe->regs = stmpe->variant->regs;
1418         stmpe->num_gpios = stmpe->variant->num_gpios;
1419         stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc");
1420         if (!IS_ERR(stmpe->vcc)) {
1421                 ret = regulator_enable(stmpe->vcc);
1422                 if (ret)
1423                         dev_warn(ci->dev, "failed to enable VCC supply\n");
1424         }
1425         stmpe->vio = devm_regulator_get_optional(ci->dev, "vio");
1426         if (!IS_ERR(stmpe->vio)) {
1427                 ret = regulator_enable(stmpe->vio);
1428                 if (ret)
1429                         dev_warn(ci->dev, "failed to enable VIO supply\n");
1430         }
1431         dev_set_drvdata(stmpe->dev, stmpe);
1432 
1433         if (ci->init)
1434                 ci->init(stmpe);
1435 
1436         if (pdata->irq_over_gpio) {
1437                 ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio,
1438                                 GPIOF_DIR_IN, "stmpe");
1439                 if (ret) {
1440                         dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
1441                                         ret);
1442                         return ret;
1443                 }
1444 
1445                 stmpe->irq = gpio_to_irq(pdata->irq_gpio);
1446         } else {
1447                 stmpe->irq = ci->irq;
1448         }
1449 
1450         if (stmpe->irq < 0) {
1451                 /* use alternate variant info for no-irq mode, if supported */
1452                 dev_info(stmpe->dev,
1453                         "%s configured in no-irq mode by platform data\n",
1454                         stmpe->variant->name);
1455                 if (!stmpe_noirq_variant_info[stmpe->partnum]) {
1456                         dev_err(stmpe->dev,
1457                                 "%s does not support no-irq mode!\n",
1458                                 stmpe->variant->name);
1459                         return -ENODEV;
1460                 }
1461                 stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
1462         } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
1463                 pdata->irq_trigger = irq_get_trigger_type(stmpe->irq);
1464         }
1465 
1466         ret = stmpe_chip_init(stmpe);
1467         if (ret)
1468                 return ret;
1469 
1470         if (stmpe->irq >= 0) {
1471                 ret = stmpe_irq_init(stmpe, np);
1472                 if (ret)
1473                         return ret;
1474 
1475                 ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL,
1476                                 stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT,
1477                                 "stmpe", stmpe);
1478                 if (ret) {
1479                         dev_err(stmpe->dev, "failed to request IRQ: %d\n",
1480                                         ret);
1481                         return ret;
1482                 }
1483         }
1484 
1485         ret = stmpe_devices_init(stmpe);
1486         if (!ret)
1487                 return 0;
1488 
1489         dev_err(stmpe->dev, "failed to add children\n");
1490         mfd_remove_devices(stmpe->dev);
1491 
1492         return ret;
1493 }
1494 
1495 int stmpe_remove(struct stmpe *stmpe)
1496 {
1497         if (!IS_ERR(stmpe->vio))
1498                 regulator_disable(stmpe->vio);
1499         if (!IS_ERR(stmpe->vcc))
1500                 regulator_disable(stmpe->vcc);
1501 
1502         __stmpe_disable(stmpe, STMPE_BLOCK_ADC);
1503 
1504         mfd_remove_devices(stmpe->dev);
1505 
1506         return 0;
1507 }
1508 
1509 #ifdef CONFIG_PM
1510 static int stmpe_suspend(struct device *dev)
1511 {
1512         struct stmpe *stmpe = dev_get_drvdata(dev);
1513 
1514         if (stmpe->irq >= 0 && device_may_wakeup(dev))
1515                 enable_irq_wake(stmpe->irq);
1516 
1517         return 0;
1518 }
1519 
1520 static int stmpe_resume(struct device *dev)
1521 {
1522         struct stmpe *stmpe = dev_get_drvdata(dev);
1523 
1524         if (stmpe->irq >= 0 && device_may_wakeup(dev))
1525                 disable_irq_wake(stmpe->irq);
1526 
1527         return 0;
1528 }
1529 
1530 const struct dev_pm_ops stmpe_dev_pm_ops = {
1531         .suspend        = stmpe_suspend,
1532         .resume         = stmpe_resume,
1533 };
1534 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/mfd/stmpe.c

DEFINITIONS
