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Merge tag 'media/v4.6-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab...
[deliverable/linux.git] / drivers / mfd / stmpe.c
1 /*
2 * ST Microelectronics MFD: stmpe's driver
3 *
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
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 static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
27 {
28 return stmpe->variant->enable(stmpe, blocks, true);
29 }
30
31 static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
32 {
33 return stmpe->variant->enable(stmpe, blocks, false);
34 }
35
36 static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg)
37 {
38 int ret;
39
40 ret = stmpe->ci->read_byte(stmpe, reg);
41 if (ret < 0)
42 dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret);
43
44 dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret);
45
46 return ret;
47 }
48
49 static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
50 {
51 int ret;
52
53 dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val);
54
55 ret = stmpe->ci->write_byte(stmpe, reg, val);
56 if (ret < 0)
57 dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret);
58
59 return ret;
60 }
61
62 static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
63 {
64 int ret;
65
66 ret = __stmpe_reg_read(stmpe, reg);
67 if (ret < 0)
68 return ret;
69
70 ret &= ~mask;
71 ret |= val;
72
73 return __stmpe_reg_write(stmpe, reg, ret);
74 }
75
76 static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
77 u8 *values)
78 {
79 int ret;
80
81 ret = stmpe->ci->read_block(stmpe, reg, length, values);
82 if (ret < 0)
83 dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret);
84
85 dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret);
86 stmpe_dump_bytes("stmpe rd: ", values, length);
87
88 return ret;
89 }
90
91 static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
92 const u8 *values)
93 {
94 int ret;
95
96 dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length);
97 stmpe_dump_bytes("stmpe wr: ", values, length);
98
99 ret = stmpe->ci->write_block(stmpe, reg, length, values);
100 if (ret < 0)
101 dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret);
102
103 return ret;
104 }
105
106 /**
107 * stmpe_enable - enable blocks on an STMPE device
108 * @stmpe: Device to work on
109 * @blocks: Mask of blocks (enum stmpe_block values) to enable
110 */
111 int stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
112 {
113 int ret;
114
115 mutex_lock(&stmpe->lock);
116 ret = __stmpe_enable(stmpe, blocks);
117 mutex_unlock(&stmpe->lock);
118
119 return ret;
120 }
121 EXPORT_SYMBOL_GPL(stmpe_enable);
122
123 /**
124 * stmpe_disable - disable blocks on an STMPE device
125 * @stmpe: Device to work on
126 * @blocks: Mask of blocks (enum stmpe_block values) to enable
127 */
128 int stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
129 {
130 int ret;
131
132 mutex_lock(&stmpe->lock);
133 ret = __stmpe_disable(stmpe, blocks);
134 mutex_unlock(&stmpe->lock);
135
136 return ret;
137 }
138 EXPORT_SYMBOL_GPL(stmpe_disable);
139
140 /**
141 * stmpe_reg_read() - read a single STMPE register
142 * @stmpe: Device to read from
143 * @reg: Register to read
144 */
145 int stmpe_reg_read(struct stmpe *stmpe, u8 reg)
146 {
147 int ret;
148
149 mutex_lock(&stmpe->lock);
150 ret = __stmpe_reg_read(stmpe, reg);
151 mutex_unlock(&stmpe->lock);
152
153 return ret;
154 }
155 EXPORT_SYMBOL_GPL(stmpe_reg_read);
156
157 /**
158 * stmpe_reg_write() - write a single STMPE register
159 * @stmpe: Device to write to
160 * @reg: Register to write
161 * @val: Value to write
162 */
163 int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
164 {
165 int ret;
166
167 mutex_lock(&stmpe->lock);
168 ret = __stmpe_reg_write(stmpe, reg, val);
169 mutex_unlock(&stmpe->lock);
170
171 return ret;
172 }
173 EXPORT_SYMBOL_GPL(stmpe_reg_write);
174
175 /**
176 * stmpe_set_bits() - set the value of a bitfield in a STMPE register
177 * @stmpe: Device to write to
178 * @reg: Register to write
179 * @mask: Mask of bits to set
180 * @val: Value to set
181 */
182 int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
183 {
184 int ret;
185
186 mutex_lock(&stmpe->lock);
187 ret = __stmpe_set_bits(stmpe, reg, mask, val);
188 mutex_unlock(&stmpe->lock);
189
190 return ret;
191 }
192 EXPORT_SYMBOL_GPL(stmpe_set_bits);
193
194 /**
195 * stmpe_block_read() - read multiple STMPE registers
196 * @stmpe: Device to read from
197 * @reg: First register
198 * @length: Number of registers
199 * @values: Buffer to write to
200 */
201 int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
202 {
203 int ret;
204
205 mutex_lock(&stmpe->lock);
206 ret = __stmpe_block_read(stmpe, reg, length, values);
207 mutex_unlock(&stmpe->lock);
208
209 return ret;
210 }
211 EXPORT_SYMBOL_GPL(stmpe_block_read);
212
213 /**
214 * stmpe_block_write() - write multiple STMPE registers
215 * @stmpe: Device to write to
216 * @reg: First register
217 * @length: Number of registers
218 * @values: Values to write
219 */
220 int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
221 const u8 *values)
222 {
223 int ret;
224
225 mutex_lock(&stmpe->lock);
226 ret = __stmpe_block_write(stmpe, reg, length, values);
227 mutex_unlock(&stmpe->lock);
228
229 return ret;
230 }
231 EXPORT_SYMBOL_GPL(stmpe_block_write);
232
233 /**
234 * stmpe_set_altfunc()- set the alternate function for STMPE pins
235 * @stmpe: Device to configure
236 * @pins: Bitmask of pins to affect
237 * @block: block to enable alternate functions for
238 *
239 * @pins is assumed to have a bit set for each of the bits whose alternate
240 * function is to be changed, numbered according to the GPIOXY numbers.
241 *
242 * If the GPIO module is not enabled, this function automatically enables it in
243 * order to perform the change.
244 */
245 int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block)
246 {
247 struct stmpe_variant_info *variant = stmpe->variant;
248 u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];
249 int af_bits = variant->af_bits;
250 int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8);
251 int mask = (1 << af_bits) - 1;
252 u8 regs[8];
253 int af, afperreg, ret;
254
255 if (!variant->get_altfunc)
256 return 0;
257
258 afperreg = 8 / af_bits;
259 mutex_lock(&stmpe->lock);
260
261 ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
262 if (ret < 0)
263 goto out;
264
265 ret = __stmpe_block_read(stmpe, regaddr, numregs, regs);
266 if (ret < 0)
267 goto out;
268
269 af = variant->get_altfunc(stmpe, block);
270
271 while (pins) {
272 int pin = __ffs(pins);
273 int regoffset = numregs - (pin / afperreg) - 1;
274 int pos = (pin % afperreg) * (8 / afperreg);
275
276 regs[regoffset] &= ~(mask << pos);
277 regs[regoffset] |= af << pos;
278
279 pins &= ~(1 << pin);
280 }
281
282 ret = __stmpe_block_write(stmpe, regaddr, numregs, regs);
283
284 out:
285 mutex_unlock(&stmpe->lock);
286 return ret;
287 }
288 EXPORT_SYMBOL_GPL(stmpe_set_altfunc);
289
290 /*
291 * GPIO (all variants)
292 */
293
294 static struct resource stmpe_gpio_resources[] = {
295 /* Start and end filled dynamically */
296 {
297 .flags = IORESOURCE_IRQ,
298 },
299 };
300
301 static const struct mfd_cell stmpe_gpio_cell = {
302 .name = "stmpe-gpio",
303 .of_compatible = "st,stmpe-gpio",
304 .resources = stmpe_gpio_resources,
305 .num_resources = ARRAY_SIZE(stmpe_gpio_resources),
306 };
307
308 static const struct mfd_cell stmpe_gpio_cell_noirq = {
309 .name = "stmpe-gpio",
310 .of_compatible = "st,stmpe-gpio",
311 /* gpio cell resources consist of an irq only so no resources here */
312 };
313
314 /*
315 * Keypad (1601, 2401, 2403)
316 */
317
318 static struct resource stmpe_keypad_resources[] = {
319 {
320 .name = "KEYPAD",
321 .flags = IORESOURCE_IRQ,
322 },
323 {
324 .name = "KEYPAD_OVER",
325 .flags = IORESOURCE_IRQ,
326 },
327 };
328
329 static const struct mfd_cell stmpe_keypad_cell = {
330 .name = "stmpe-keypad",
331 .of_compatible = "st,stmpe-keypad",
332 .resources = stmpe_keypad_resources,
333 .num_resources = ARRAY_SIZE(stmpe_keypad_resources),
334 };
335
336 /*
337 * PWM (1601, 2401, 2403)
338 */
339 static struct resource stmpe_pwm_resources[] = {
340 {
341 .name = "PWM0",
342 .flags = IORESOURCE_IRQ,
343 },
344 {
345 .name = "PWM1",
346 .flags = IORESOURCE_IRQ,
347 },
348 {
349 .name = "PWM2",
350 .flags = IORESOURCE_IRQ,
351 },
352 };
353
354 static const struct mfd_cell stmpe_pwm_cell = {
355 .name = "stmpe-pwm",
356 .of_compatible = "st,stmpe-pwm",
357 .resources = stmpe_pwm_resources,
358 .num_resources = ARRAY_SIZE(stmpe_pwm_resources),
359 };
360
361 /*
362 * STMPE801
363 */
364 static const u8 stmpe801_regs[] = {
365 [STMPE_IDX_CHIP_ID] = STMPE801_REG_CHIP_ID,
366 [STMPE_IDX_ICR_LSB] = STMPE801_REG_SYS_CTRL,
367 [STMPE_IDX_GPMR_LSB] = STMPE801_REG_GPIO_MP_STA,
368 [STMPE_IDX_GPSR_LSB] = STMPE801_REG_GPIO_SET_PIN,
369 [STMPE_IDX_GPCR_LSB] = STMPE801_REG_GPIO_SET_PIN,
370 [STMPE_IDX_GPDR_LSB] = STMPE801_REG_GPIO_DIR,
371 [STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN,
372 [STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA,
373
374 };
375
376 static struct stmpe_variant_block stmpe801_blocks[] = {
377 {
378 .cell = &stmpe_gpio_cell,
379 .irq = 0,
380 .block = STMPE_BLOCK_GPIO,
381 },
382 };
383
384 static struct stmpe_variant_block stmpe801_blocks_noirq[] = {
385 {
386 .cell = &stmpe_gpio_cell_noirq,
387 .block = STMPE_BLOCK_GPIO,
388 },
389 };
390
391 static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks,
392 bool enable)
393 {
394 if (blocks & STMPE_BLOCK_GPIO)
395 return 0;
396 else
397 return -EINVAL;
398 }
399
400 static struct stmpe_variant_info stmpe801 = {
401 .name = "stmpe801",
402 .id_val = STMPE801_ID,
403 .id_mask = 0xffff,
404 .num_gpios = 8,
405 .regs = stmpe801_regs,
406 .blocks = stmpe801_blocks,
407 .num_blocks = ARRAY_SIZE(stmpe801_blocks),
408 .num_irqs = STMPE801_NR_INTERNAL_IRQS,
409 .enable = stmpe801_enable,
410 };
411
412 static struct stmpe_variant_info stmpe801_noirq = {
413 .name = "stmpe801",
414 .id_val = STMPE801_ID,
415 .id_mask = 0xffff,
416 .num_gpios = 8,
417 .regs = stmpe801_regs,
418 .blocks = stmpe801_blocks_noirq,
419 .num_blocks = ARRAY_SIZE(stmpe801_blocks_noirq),
420 .enable = stmpe801_enable,
421 };
422
423 /*
424 * Touchscreen (STMPE811 or STMPE610)
425 */
426
427 static struct resource stmpe_ts_resources[] = {
428 {
429 .name = "TOUCH_DET",
430 .flags = IORESOURCE_IRQ,
431 },
432 {
433 .name = "FIFO_TH",
434 .flags = IORESOURCE_IRQ,
435 },
436 };
437
438 static const struct mfd_cell stmpe_ts_cell = {
439 .name = "stmpe-ts",
440 .of_compatible = "st,stmpe-ts",
441 .resources = stmpe_ts_resources,
442 .num_resources = ARRAY_SIZE(stmpe_ts_resources),
443 };
444
445 /*
446 * STMPE811 or STMPE610
447 */
448
449 static const u8 stmpe811_regs[] = {
450 [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID,
451 [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL,
452 [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN,
453 [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA,
454 [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA,
455 [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN,
456 [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN,
457 [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR,
458 [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE,
459 [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE,
460 [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
461 [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN,
462 [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA,
463 [STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED,
464 };
465
466 static struct stmpe_variant_block stmpe811_blocks[] = {
467 {
468 .cell = &stmpe_gpio_cell,
469 .irq = STMPE811_IRQ_GPIOC,
470 .block = STMPE_BLOCK_GPIO,
471 },
472 {
473 .cell = &stmpe_ts_cell,
474 .irq = STMPE811_IRQ_TOUCH_DET,
475 .block = STMPE_BLOCK_TOUCHSCREEN,
476 },
477 };
478
479 static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
480 bool enable)
481 {
482 unsigned int mask = 0;
483
484 if (blocks & STMPE_BLOCK_GPIO)
485 mask |= STMPE811_SYS_CTRL2_GPIO_OFF;
486
487 if (blocks & STMPE_BLOCK_ADC)
488 mask |= STMPE811_SYS_CTRL2_ADC_OFF;
489
490 if (blocks & STMPE_BLOCK_TOUCHSCREEN)
491 mask |= STMPE811_SYS_CTRL2_TSC_OFF;
492
493 return __stmpe_set_bits(stmpe, STMPE811_REG_SYS_CTRL2, mask,
494 enable ? 0 : mask);
495 }
496
497 static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
498 {
499 /* 0 for touchscreen, 1 for GPIO */
500 return block != STMPE_BLOCK_TOUCHSCREEN;
501 }
502
503 static struct stmpe_variant_info stmpe811 = {
504 .name = "stmpe811",
505 .id_val = 0x0811,
506 .id_mask = 0xffff,
507 .num_gpios = 8,
508 .af_bits = 1,
509 .regs = stmpe811_regs,
510 .blocks = stmpe811_blocks,
511 .num_blocks = ARRAY_SIZE(stmpe811_blocks),
512 .num_irqs = STMPE811_NR_INTERNAL_IRQS,
513 .enable = stmpe811_enable,
514 .get_altfunc = stmpe811_get_altfunc,
515 };
516
517 /* Similar to 811, except number of gpios */
518 static struct stmpe_variant_info stmpe610 = {
519 .name = "stmpe610",
520 .id_val = 0x0811,
521 .id_mask = 0xffff,
522 .num_gpios = 6,
523 .af_bits = 1,
524 .regs = stmpe811_regs,
525 .blocks = stmpe811_blocks,
526 .num_blocks = ARRAY_SIZE(stmpe811_blocks),
527 .num_irqs = STMPE811_NR_INTERNAL_IRQS,
528 .enable = stmpe811_enable,
529 .get_altfunc = stmpe811_get_altfunc,
530 };
531
532 /*
533 * STMPE1601
534 */
535
536 static const u8 stmpe1601_regs[] = {
537 [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID,
538 [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB,
539 [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB,
540 [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB,
541 [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB,
542 [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB,
543 [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB,
544 [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB,
545 [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB,
546 [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB,
547 [STMPE_IDX_GPPUR_LSB] = STMPE1601_REG_GPIO_PU_LSB,
548 [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB,
549 [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB,
550 [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB,
551 [STMPE_IDX_GPEDR_MSB] = STMPE1601_REG_GPIO_ED_MSB,
552 };
553
554 static struct stmpe_variant_block stmpe1601_blocks[] = {
555 {
556 .cell = &stmpe_gpio_cell,
557 .irq = STMPE1601_IRQ_GPIOC,
558 .block = STMPE_BLOCK_GPIO,
559 },
560 {
561 .cell = &stmpe_keypad_cell,
562 .irq = STMPE1601_IRQ_KEYPAD,
563 .block = STMPE_BLOCK_KEYPAD,
564 },
565 {
566 .cell = &stmpe_pwm_cell,
567 .irq = STMPE1601_IRQ_PWM0,
568 .block = STMPE_BLOCK_PWM,
569 },
570 };
571
572 /* supported autosleep timeout delay (in msecs) */
573 static const int stmpe_autosleep_delay[] = {
574 4, 16, 32, 64, 128, 256, 512, 1024,
575 };
576
577 static int stmpe_round_timeout(int timeout)
578 {
579 int i;
580
581 for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) {
582 if (stmpe_autosleep_delay[i] >= timeout)
583 return i;
584 }
585
586 /*
587 * requests for delays longer than supported should not return the
588 * longest supported delay
589 */
590 return -EINVAL;
591 }
592
593 static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout)
594 {
595 int ret;
596
597 if (!stmpe->variant->enable_autosleep)
598 return -ENOSYS;
599
600 mutex_lock(&stmpe->lock);
601 ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout);
602 mutex_unlock(&stmpe->lock);
603
604 return ret;
605 }
606
607 /*
608 * Both stmpe 1601/2403 support same layout for autosleep
609 */
610 static int stmpe1601_autosleep(struct stmpe *stmpe,
611 int autosleep_timeout)
612 {
613 int ret, timeout;
614
615 /* choose the best available timeout */
616 timeout = stmpe_round_timeout(autosleep_timeout);
617 if (timeout < 0) {
618 dev_err(stmpe->dev, "invalid timeout\n");
619 return timeout;
620 }
621
622 ret = __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2,
623 STMPE1601_AUTOSLEEP_TIMEOUT_MASK,
624 timeout);
625 if (ret < 0)
626 return ret;
627
628 return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2,
629 STPME1601_AUTOSLEEP_ENABLE,
630 STPME1601_AUTOSLEEP_ENABLE);
631 }
632
633 static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks,
634 bool enable)
635 {
636 unsigned int mask = 0;
637
638 if (blocks & STMPE_BLOCK_GPIO)
639 mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO;
640 else
641 mask &= ~STMPE1601_SYS_CTRL_ENABLE_GPIO;
642
643 if (blocks & STMPE_BLOCK_KEYPAD)
644 mask |= STMPE1601_SYS_CTRL_ENABLE_KPC;
645 else
646 mask &= ~STMPE1601_SYS_CTRL_ENABLE_KPC;
647
648 if (blocks & STMPE_BLOCK_PWM)
649 mask |= STMPE1601_SYS_CTRL_ENABLE_SPWM;
650 else
651 mask &= ~STMPE1601_SYS_CTRL_ENABLE_SPWM;
652
653 return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL, mask,
654 enable ? mask : 0);
655 }
656
657 static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
658 {
659 switch (block) {
660 case STMPE_BLOCK_PWM:
661 return 2;
662
663 case STMPE_BLOCK_KEYPAD:
664 return 1;
665
666 case STMPE_BLOCK_GPIO:
667 default:
668 return 0;
669 }
670 }
671
672 static struct stmpe_variant_info stmpe1601 = {
673 .name = "stmpe1601",
674 .id_val = 0x0210,
675 .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */
676 .num_gpios = 16,
677 .af_bits = 2,
678 .regs = stmpe1601_regs,
679 .blocks = stmpe1601_blocks,
680 .num_blocks = ARRAY_SIZE(stmpe1601_blocks),
681 .num_irqs = STMPE1601_NR_INTERNAL_IRQS,
682 .enable = stmpe1601_enable,
683 .get_altfunc = stmpe1601_get_altfunc,
684 .enable_autosleep = stmpe1601_autosleep,
685 };
686
687 /*
688 * STMPE1801
689 */
690 static const u8 stmpe1801_regs[] = {
691 [STMPE_IDX_CHIP_ID] = STMPE1801_REG_CHIP_ID,
692 [STMPE_IDX_ICR_LSB] = STMPE1801_REG_INT_CTRL_LOW,
693 [STMPE_IDX_IER_LSB] = STMPE1801_REG_INT_EN_MASK_LOW,
694 [STMPE_IDX_ISR_LSB] = STMPE1801_REG_INT_STA_LOW,
695 [STMPE_IDX_GPMR_LSB] = STMPE1801_REG_GPIO_MP_LOW,
696 [STMPE_IDX_GPSR_LSB] = STMPE1801_REG_GPIO_SET_LOW,
697 [STMPE_IDX_GPCR_LSB] = STMPE1801_REG_GPIO_CLR_LOW,
698 [STMPE_IDX_GPDR_LSB] = STMPE1801_REG_GPIO_SET_DIR_LOW,
699 [STMPE_IDX_GPRER_LSB] = STMPE1801_REG_GPIO_RE_LOW,
700 [STMPE_IDX_GPFER_LSB] = STMPE1801_REG_GPIO_FE_LOW,
701 [STMPE_IDX_GPPUR_LSB] = STMPE1801_REG_GPIO_PULL_UP_LOW,
702 [STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW,
703 [STMPE_IDX_ISGPIOR_LSB] = STMPE1801_REG_INT_STA_GPIO_LOW,
704 };
705
706 static struct stmpe_variant_block stmpe1801_blocks[] = {
707 {
708 .cell = &stmpe_gpio_cell,
709 .irq = STMPE1801_IRQ_GPIOC,
710 .block = STMPE_BLOCK_GPIO,
711 },
712 {
713 .cell = &stmpe_keypad_cell,
714 .irq = STMPE1801_IRQ_KEYPAD,
715 .block = STMPE_BLOCK_KEYPAD,
716 },
717 };
718
719 static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks,
720 bool enable)
721 {
722 unsigned int mask = 0;
723 if (blocks & STMPE_BLOCK_GPIO)
724 mask |= STMPE1801_MSK_INT_EN_GPIO;
725
726 if (blocks & STMPE_BLOCK_KEYPAD)
727 mask |= STMPE1801_MSK_INT_EN_KPC;
728
729 return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask,
730 enable ? mask : 0);
731 }
732
733 static int stmpe1801_reset(struct stmpe *stmpe)
734 {
735 unsigned long timeout;
736 int ret = 0;
737
738 ret = __stmpe_set_bits(stmpe, STMPE1801_REG_SYS_CTRL,
739 STMPE1801_MSK_SYS_CTRL_RESET, STMPE1801_MSK_SYS_CTRL_RESET);
740 if (ret < 0)
741 return ret;
742
743 timeout = jiffies + msecs_to_jiffies(100);
744 while (time_before(jiffies, timeout)) {
745 ret = __stmpe_reg_read(stmpe, STMPE1801_REG_SYS_CTRL);
746 if (ret < 0)
747 return ret;
748 if (!(ret & STMPE1801_MSK_SYS_CTRL_RESET))
749 return 0;
750 usleep_range(100, 200);
751 }
752 return -EIO;
753 }
754
755 static struct stmpe_variant_info stmpe1801 = {
756 .name = "stmpe1801",
757 .id_val = STMPE1801_ID,
758 .id_mask = 0xfff0,
759 .num_gpios = 18,
760 .af_bits = 0,
761 .regs = stmpe1801_regs,
762 .blocks = stmpe1801_blocks,
763 .num_blocks = ARRAY_SIZE(stmpe1801_blocks),
764 .num_irqs = STMPE1801_NR_INTERNAL_IRQS,
765 .enable = stmpe1801_enable,
766 /* stmpe1801 do not have any gpio alternate function */
767 .get_altfunc = NULL,
768 };
769
770 /*
771 * STMPE24XX
772 */
773
774 static const u8 stmpe24xx_regs[] = {
775 [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID,
776 [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB,
777 [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB,
778 [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB,
779 [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB,
780 [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB,
781 [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB,
782 [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB,
783 [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB,
784 [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB,
785 [STMPE_IDX_GPPUR_LSB] = STMPE24XX_REG_GPPUR_LSB,
786 [STMPE_IDX_GPPDR_LSB] = STMPE24XX_REG_GPPDR_LSB,
787 [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB,
788 [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB,
789 [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB,
790 [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB,
791 };
792
793 static struct stmpe_variant_block stmpe24xx_blocks[] = {
794 {
795 .cell = &stmpe_gpio_cell,
796 .irq = STMPE24XX_IRQ_GPIOC,
797 .block = STMPE_BLOCK_GPIO,
798 },
799 {
800 .cell = &stmpe_keypad_cell,
801 .irq = STMPE24XX_IRQ_KEYPAD,
802 .block = STMPE_BLOCK_KEYPAD,
803 },
804 {
805 .cell = &stmpe_pwm_cell,
806 .irq = STMPE24XX_IRQ_PWM0,
807 .block = STMPE_BLOCK_PWM,
808 },
809 };
810
811 static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks,
812 bool enable)
813 {
814 unsigned int mask = 0;
815
816 if (blocks & STMPE_BLOCK_GPIO)
817 mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO;
818
819 if (blocks & STMPE_BLOCK_KEYPAD)
820 mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC;
821
822 return __stmpe_set_bits(stmpe, STMPE24XX_REG_SYS_CTRL, mask,
823 enable ? mask : 0);
824 }
825
826 static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
827 {
828 switch (block) {
829 case STMPE_BLOCK_ROTATOR:
830 return 2;
831
832 case STMPE_BLOCK_KEYPAD:
833 case STMPE_BLOCK_PWM:
834 return 1;
835
836 case STMPE_BLOCK_GPIO:
837 default:
838 return 0;
839 }
840 }
841
842 static struct stmpe_variant_info stmpe2401 = {
843 .name = "stmpe2401",
844 .id_val = 0x0101,
845 .id_mask = 0xffff,
846 .num_gpios = 24,
847 .af_bits = 2,
848 .regs = stmpe24xx_regs,
849 .blocks = stmpe24xx_blocks,
850 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
851 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
852 .enable = stmpe24xx_enable,
853 .get_altfunc = stmpe24xx_get_altfunc,
854 };
855
856 static struct stmpe_variant_info stmpe2403 = {
857 .name = "stmpe2403",
858 .id_val = 0x0120,
859 .id_mask = 0xffff,
860 .num_gpios = 24,
861 .af_bits = 2,
862 .regs = stmpe24xx_regs,
863 .blocks = stmpe24xx_blocks,
864 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
865 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
866 .enable = stmpe24xx_enable,
867 .get_altfunc = stmpe24xx_get_altfunc,
868 .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */
869 };
870
871 static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
872 [STMPE610] = &stmpe610,
873 [STMPE801] = &stmpe801,
874 [STMPE811] = &stmpe811,
875 [STMPE1601] = &stmpe1601,
876 [STMPE1801] = &stmpe1801,
877 [STMPE2401] = &stmpe2401,
878 [STMPE2403] = &stmpe2403,
879 };
880
881 /*
882 * These devices can be connected in a 'no-irq' configuration - the irq pin
883 * is not used and the device cannot interrupt the CPU. Here we only list
884 * devices which support this configuration - the driver will fail probing
885 * for any devices not listed here which are configured in this way.
886 */
887 static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = {
888 [STMPE801] = &stmpe801_noirq,
889 };
890
891 static irqreturn_t stmpe_irq(int irq, void *data)
892 {
893 struct stmpe *stmpe = data;
894 struct stmpe_variant_info *variant = stmpe->variant;
895 int num = DIV_ROUND_UP(variant->num_irqs, 8);
896 u8 israddr;
897 u8 isr[3];
898 int ret;
899 int i;
900
901 if (variant->id_val == STMPE801_ID) {
902 int base = irq_create_mapping(stmpe->domain, 0);
903
904 handle_nested_irq(base);
905 return IRQ_HANDLED;
906 }
907
908 if (variant->id_val == STMPE1801_ID)
909 israddr = stmpe->regs[STMPE_IDX_ISR_LSB];
910 else
911 israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
912
913 ret = stmpe_block_read(stmpe, israddr, num, isr);
914 if (ret < 0)
915 return IRQ_NONE;
916
917 for (i = 0; i < num; i++) {
918 int bank = num - i - 1;
919 u8 status = isr[i];
920 u8 clear;
921
922 status &= stmpe->ier[bank];
923 if (!status)
924 continue;
925
926 clear = status;
927 while (status) {
928 int bit = __ffs(status);
929 int line = bank * 8 + bit;
930 int nestedirq = irq_create_mapping(stmpe->domain, line);
931
932 handle_nested_irq(nestedirq);
933 status &= ~(1 << bit);
934 }
935
936 stmpe_reg_write(stmpe, israddr + i, clear);
937 }
938
939 return IRQ_HANDLED;
940 }
941
942 static void stmpe_irq_lock(struct irq_data *data)
943 {
944 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
945
946 mutex_lock(&stmpe->irq_lock);
947 }
948
949 static void stmpe_irq_sync_unlock(struct irq_data *data)
950 {
951 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
952 struct stmpe_variant_info *variant = stmpe->variant;
953 int num = DIV_ROUND_UP(variant->num_irqs, 8);
954 int i;
955
956 for (i = 0; i < num; i++) {
957 u8 new = stmpe->ier[i];
958 u8 old = stmpe->oldier[i];
959
960 if (new == old)
961 continue;
962
963 stmpe->oldier[i] = new;
964 stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB] - i, new);
965 }
966
967 mutex_unlock(&stmpe->irq_lock);
968 }
969
970 static void stmpe_irq_mask(struct irq_data *data)
971 {
972 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
973 int offset = data->hwirq;
974 int regoffset = offset / 8;
975 int mask = 1 << (offset % 8);
976
977 stmpe->ier[regoffset] &= ~mask;
978 }
979
980 static void stmpe_irq_unmask(struct irq_data *data)
981 {
982 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
983 int offset = data->hwirq;
984 int regoffset = offset / 8;
985 int mask = 1 << (offset % 8);
986
987 stmpe->ier[regoffset] |= mask;
988 }
989
990 static struct irq_chip stmpe_irq_chip = {
991 .name = "stmpe",
992 .irq_bus_lock = stmpe_irq_lock,
993 .irq_bus_sync_unlock = stmpe_irq_sync_unlock,
994 .irq_mask = stmpe_irq_mask,
995 .irq_unmask = stmpe_irq_unmask,
996 };
997
998 static int stmpe_irq_map(struct irq_domain *d, unsigned int virq,
999 irq_hw_number_t hwirq)
1000 {
1001 struct stmpe *stmpe = d->host_data;
1002 struct irq_chip *chip = NULL;
1003
1004 if (stmpe->variant->id_val != STMPE801_ID)
1005 chip = &stmpe_irq_chip;
1006
1007 irq_set_chip_data(virq, stmpe);
1008 irq_set_chip_and_handler(virq, chip, handle_edge_irq);
1009 irq_set_nested_thread(virq, 1);
1010 irq_set_noprobe(virq);
1011
1012 return 0;
1013 }
1014
1015 static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq)
1016 {
1017 irq_set_chip_and_handler(virq, NULL, NULL);
1018 irq_set_chip_data(virq, NULL);
1019 }
1020
1021 static const struct irq_domain_ops stmpe_irq_ops = {
1022 .map = stmpe_irq_map,
1023 .unmap = stmpe_irq_unmap,
1024 .xlate = irq_domain_xlate_twocell,
1025 };
1026
1027 static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np)
1028 {
1029 int base = 0;
1030 int num_irqs = stmpe->variant->num_irqs;
1031
1032 stmpe->domain = irq_domain_add_simple(np, num_irqs, base,
1033 &stmpe_irq_ops, stmpe);
1034 if (!stmpe->domain) {
1035 dev_err(stmpe->dev, "Failed to create irqdomain\n");
1036 return -ENOSYS;
1037 }
1038
1039 return 0;
1040 }
1041
1042 static int stmpe_chip_init(struct stmpe *stmpe)
1043 {
1044 unsigned int irq_trigger = stmpe->pdata->irq_trigger;
1045 int autosleep_timeout = stmpe->pdata->autosleep_timeout;
1046 struct stmpe_variant_info *variant = stmpe->variant;
1047 u8 icr = 0;
1048 unsigned int id;
1049 u8 data[2];
1050 int ret;
1051
1052 ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID],
1053 ARRAY_SIZE(data), data);
1054 if (ret < 0)
1055 return ret;
1056
1057 id = (data[0] << 8) | data[1];
1058 if ((id & variant->id_mask) != variant->id_val) {
1059 dev_err(stmpe->dev, "unknown chip id: %#x\n", id);
1060 return -EINVAL;
1061 }
1062
1063 dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id);
1064
1065 /* Disable all modules -- subdrivers should enable what they need. */
1066 ret = stmpe_disable(stmpe, ~0);
1067 if (ret)
1068 return ret;
1069
1070 if (id == STMPE1801_ID) {
1071 ret = stmpe1801_reset(stmpe);
1072 if (ret < 0)
1073 return ret;
1074 }
1075
1076 if (stmpe->irq >= 0) {
1077 if (id == STMPE801_ID)
1078 icr = STMPE801_REG_SYS_CTRL_INT_EN;
1079 else
1080 icr = STMPE_ICR_LSB_GIM;
1081
1082 /* STMPE801 doesn't support Edge interrupts */
1083 if (id != STMPE801_ID) {
1084 if (irq_trigger == IRQF_TRIGGER_FALLING ||
1085 irq_trigger == IRQF_TRIGGER_RISING)
1086 icr |= STMPE_ICR_LSB_EDGE;
1087 }
1088
1089 if (irq_trigger == IRQF_TRIGGER_RISING ||
1090 irq_trigger == IRQF_TRIGGER_HIGH) {
1091 if (id == STMPE801_ID)
1092 icr |= STMPE801_REG_SYS_CTRL_INT_HI;
1093 else
1094 icr |= STMPE_ICR_LSB_HIGH;
1095 }
1096 }
1097
1098 if (stmpe->pdata->autosleep) {
1099 ret = stmpe_autosleep(stmpe, autosleep_timeout);
1100 if (ret)
1101 return ret;
1102 }
1103
1104 return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);
1105 }
1106
1107 static int stmpe_add_device(struct stmpe *stmpe, const struct mfd_cell *cell)
1108 {
1109 return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,
1110 NULL, 0, stmpe->domain);
1111 }
1112
1113 static int stmpe_devices_init(struct stmpe *stmpe)
1114 {
1115 struct stmpe_variant_info *variant = stmpe->variant;
1116 unsigned int platform_blocks = stmpe->pdata->blocks;
1117 int ret = -EINVAL;
1118 int i, j;
1119
1120 for (i = 0; i < variant->num_blocks; i++) {
1121 struct stmpe_variant_block *block = &variant->blocks[i];
1122
1123 if (!(platform_blocks & block->block))
1124 continue;
1125
1126 for (j = 0; j < block->cell->num_resources; j++) {
1127 struct resource *res =
1128 (struct resource *) &block->cell->resources[j];
1129
1130 /* Dynamically fill in a variant's IRQ. */
1131 if (res->flags & IORESOURCE_IRQ)
1132 res->start = res->end = block->irq + j;
1133 }
1134
1135 platform_blocks &= ~block->block;
1136 ret = stmpe_add_device(stmpe, block->cell);
1137 if (ret)
1138 return ret;
1139 }
1140
1141 if (platform_blocks)
1142 dev_warn(stmpe->dev,
1143 "platform wants blocks (%#x) not present on variant",
1144 platform_blocks);
1145
1146 return ret;
1147 }
1148
1149 static void stmpe_of_probe(struct stmpe_platform_data *pdata,
1150 struct device_node *np)
1151 {
1152 struct device_node *child;
1153
1154 pdata->id = of_alias_get_id(np, "stmpe-i2c");
1155 if (pdata->id < 0)
1156 pdata->id = -1;
1157
1158 pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
1159 &pdata->irq_trigger);
1160 if (gpio_is_valid(pdata->irq_gpio))
1161 pdata->irq_over_gpio = 1;
1162 else
1163 pdata->irq_trigger = IRQF_TRIGGER_NONE;
1164
1165 of_property_read_u32(np, "st,autosleep-timeout",
1166 &pdata->autosleep_timeout);
1167
1168 pdata->autosleep = (pdata->autosleep_timeout) ? true : false;
1169
1170 for_each_child_of_node(np, child) {
1171 if (!strcmp(child->name, "stmpe_gpio")) {
1172 pdata->blocks |= STMPE_BLOCK_GPIO;
1173 } else if (!strcmp(child->name, "stmpe_keypad")) {
1174 pdata->blocks |= STMPE_BLOCK_KEYPAD;
1175 } else if (!strcmp(child->name, "stmpe_touchscreen")) {
1176 pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;
1177 } else if (!strcmp(child->name, "stmpe_adc")) {
1178 pdata->blocks |= STMPE_BLOCK_ADC;
1179 } else if (!strcmp(child->name, "stmpe_pwm")) {
1180 pdata->blocks |= STMPE_BLOCK_PWM;
1181 } else if (!strcmp(child->name, "stmpe_rotator")) {
1182 pdata->blocks |= STMPE_BLOCK_ROTATOR;
1183 }
1184 }
1185 }
1186
1187 /* Called from client specific probe routines */
1188 int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
1189 {
1190 struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev);
1191 struct device_node *np = ci->dev->of_node;
1192 struct stmpe *stmpe;
1193 int ret;
1194
1195 if (!pdata) {
1196 if (!np)
1197 return -EINVAL;
1198
1199 pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);
1200 if (!pdata)
1201 return -ENOMEM;
1202
1203 stmpe_of_probe(pdata, np);
1204
1205 if (of_find_property(np, "interrupts", NULL) == NULL)
1206 ci->irq = -1;
1207 }
1208
1209 stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);
1210 if (!stmpe)
1211 return -ENOMEM;
1212
1213 mutex_init(&stmpe->irq_lock);
1214 mutex_init(&stmpe->lock);
1215
1216 stmpe->dev = ci->dev;
1217 stmpe->client = ci->client;
1218 stmpe->pdata = pdata;
1219 stmpe->ci = ci;
1220 stmpe->partnum = partnum;
1221 stmpe->variant = stmpe_variant_info[partnum];
1222 stmpe->regs = stmpe->variant->regs;
1223 stmpe->num_gpios = stmpe->variant->num_gpios;
1224 stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc");
1225 if (!IS_ERR(stmpe->vcc)) {
1226 ret = regulator_enable(stmpe->vcc);
1227 if (ret)
1228 dev_warn(ci->dev, "failed to enable VCC supply\n");
1229 }
1230 stmpe->vio = devm_regulator_get_optional(ci->dev, "vio");
1231 if (!IS_ERR(stmpe->vio)) {
1232 ret = regulator_enable(stmpe->vio);
1233 if (ret)
1234 dev_warn(ci->dev, "failed to enable VIO supply\n");
1235 }
1236 dev_set_drvdata(stmpe->dev, stmpe);
1237
1238 if (ci->init)
1239 ci->init(stmpe);
1240
1241 if (pdata->irq_over_gpio) {
1242 ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio,
1243 GPIOF_DIR_IN, "stmpe");
1244 if (ret) {
1245 dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
1246 ret);
1247 return ret;
1248 }
1249
1250 stmpe->irq = gpio_to_irq(pdata->irq_gpio);
1251 } else {
1252 stmpe->irq = ci->irq;
1253 }
1254
1255 if (stmpe->irq < 0) {
1256 /* use alternate variant info for no-irq mode, if supported */
1257 dev_info(stmpe->dev,
1258 "%s configured in no-irq mode by platform data\n",
1259 stmpe->variant->name);
1260 if (!stmpe_noirq_variant_info[stmpe->partnum]) {
1261 dev_err(stmpe->dev,
1262 "%s does not support no-irq mode!\n",
1263 stmpe->variant->name);
1264 return -ENODEV;
1265 }
1266 stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
1267 } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
1268 pdata->irq_trigger = irq_get_trigger_type(stmpe->irq);
1269 }
1270
1271 ret = stmpe_chip_init(stmpe);
1272 if (ret)
1273 return ret;
1274
1275 if (stmpe->irq >= 0) {
1276 ret = stmpe_irq_init(stmpe, np);
1277 if (ret)
1278 return ret;
1279
1280 ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL,
1281 stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT,
1282 "stmpe", stmpe);
1283 if (ret) {
1284 dev_err(stmpe->dev, "failed to request IRQ: %d\n",
1285 ret);
1286 return ret;
1287 }
1288 }
1289
1290 ret = stmpe_devices_init(stmpe);
1291 if (!ret)
1292 return 0;
1293
1294 dev_err(stmpe->dev, "failed to add children\n");
1295 mfd_remove_devices(stmpe->dev);
1296
1297 return ret;
1298 }
1299
1300 int stmpe_remove(struct stmpe *stmpe)
1301 {
1302 if (!IS_ERR(stmpe->vio))
1303 regulator_disable(stmpe->vio);
1304 if (!IS_ERR(stmpe->vcc))
1305 regulator_disable(stmpe->vcc);
1306
1307 mfd_remove_devices(stmpe->dev);
1308
1309 return 0;
1310 }
1311
1312 #ifdef CONFIG_PM
1313 static int stmpe_suspend(struct device *dev)
1314 {
1315 struct stmpe *stmpe = dev_get_drvdata(dev);
1316
1317 if (stmpe->irq >= 0 && device_may_wakeup(dev))
1318 enable_irq_wake(stmpe->irq);
1319
1320 return 0;
1321 }
1322
1323 static int stmpe_resume(struct device *dev)
1324 {
1325 struct stmpe *stmpe = dev_get_drvdata(dev);
1326
1327 if (stmpe->irq >= 0 && device_may_wakeup(dev))
1328 disable_irq_wake(stmpe->irq);
1329
1330 return 0;
1331 }
1332
1333 const struct dev_pm_ops stmpe_dev_pm_ops = {
1334 .suspend = stmpe_suspend,
1335 .resume = stmpe_resume,
1336 };
1337 #endif
Linux kernel - Deliverables
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