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ARC: boot log: don't assume SWAPE instruction support
[linux-stable.git] / drivers / mfd / stmpe.c
blobcfdae8a3d77976b3a5b543551d07834069a7b45d
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 /**
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 * STMPE811 or STMPE610
468 */
469
470 static const u8 stmpe811_regs[] = {
471 [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID,
472 [STMPE_IDX_SYS_CTRL] = STMPE811_REG_SYS_CTRL,
473 [STMPE_IDX_SYS_CTRL2] = STMPE811_REG_SYS_CTRL2,
474 [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL,
475 [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN,
476 [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA,
477 [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA,
478 [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN,
479 [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN,
480 [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR,
481 [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE,
482 [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE,
483 [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
484 [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN,
485 [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA,
486 [STMPE_IDX_GPEDR_LSB] = STMPE811_REG_GPIO_ED,
487 };
488
489 static struct stmpe_variant_block stmpe811_blocks[] = {
490 {
491 .cell = &stmpe_gpio_cell,
492 .irq = STMPE811_IRQ_GPIOC,
493 .block = STMPE_BLOCK_GPIO,
494 },
495 {
496 .cell = &stmpe_ts_cell,
497 .irq = STMPE811_IRQ_TOUCH_DET,
498 .block = STMPE_BLOCK_TOUCHSCREEN,
499 },
500 };
501
502 static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
503 bool enable)
504 {
505 unsigned int mask = 0;
506
507 if (blocks & STMPE_BLOCK_GPIO)
508 mask |= STMPE811_SYS_CTRL2_GPIO_OFF;
509
510 if (blocks & STMPE_BLOCK_ADC)
511 mask |= STMPE811_SYS_CTRL2_ADC_OFF;
512
513 if (blocks & STMPE_BLOCK_TOUCHSCREEN)
514 mask |= STMPE811_SYS_CTRL2_TSC_OFF;
515
516 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], mask,
517 enable ? 0 : mask);
518 }
519
520 static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
521 {
522 /* 0 for touchscreen, 1 for GPIO */
523 return block != STMPE_BLOCK_TOUCHSCREEN;
524 }
525
526 static struct stmpe_variant_info stmpe811 = {
527 .name = "stmpe811",
528 .id_val = 0x0811,
529 .id_mask = 0xffff,
530 .num_gpios = 8,
531 .af_bits = 1,
532 .regs = stmpe811_regs,
533 .blocks = stmpe811_blocks,
534 .num_blocks = ARRAY_SIZE(stmpe811_blocks),
535 .num_irqs = STMPE811_NR_INTERNAL_IRQS,
536 .enable = stmpe811_enable,
537 .get_altfunc = stmpe811_get_altfunc,
538 };
539
540 /* Similar to 811, except number of gpios */
541 static struct stmpe_variant_info stmpe610 = {
542 .name = "stmpe610",
543 .id_val = 0x0811,
544 .id_mask = 0xffff,
545 .num_gpios = 6,
546 .af_bits = 1,
547 .regs = stmpe811_regs,
548 .blocks = stmpe811_blocks,
549 .num_blocks = ARRAY_SIZE(stmpe811_blocks),
550 .num_irqs = STMPE811_NR_INTERNAL_IRQS,
551 .enable = stmpe811_enable,
552 .get_altfunc = stmpe811_get_altfunc,
553 };
554
555 /*
556 * STMPE1600
557 * Compared to all others STMPE variant, LSB and MSB regs are located in this
558 * order : LSB addr
559 * MSB addr + 1
560 * As there is only 2 * 8bits registers for GPMR/GPSR/IEGPIOPR, CSB index is MSB registers
561 */
562
563 static const u8 stmpe1600_regs[] = {
564 [STMPE_IDX_CHIP_ID] = STMPE1600_REG_CHIP_ID,
565 [STMPE_IDX_SYS_CTRL] = STMPE1600_REG_SYS_CTRL,
566 [STMPE_IDX_ICR_LSB] = STMPE1600_REG_SYS_CTRL,
567 [STMPE_IDX_GPMR_LSB] = STMPE1600_REG_GPMR_LSB,
568 [STMPE_IDX_GPMR_CSB] = STMPE1600_REG_GPMR_MSB,
569 [STMPE_IDX_GPSR_LSB] = STMPE1600_REG_GPSR_LSB,
570 [STMPE_IDX_GPSR_CSB] = STMPE1600_REG_GPSR_MSB,
571 [STMPE_IDX_GPDR_LSB] = STMPE1600_REG_GPDR_LSB,
572 [STMPE_IDX_GPDR_CSB] = STMPE1600_REG_GPDR_MSB,
573 [STMPE_IDX_IEGPIOR_LSB] = STMPE1600_REG_IEGPIOR_LSB,
574 [STMPE_IDX_IEGPIOR_CSB] = STMPE1600_REG_IEGPIOR_MSB,
575 [STMPE_IDX_ISGPIOR_LSB] = STMPE1600_REG_ISGPIOR_LSB,
576 };
577
578 static struct stmpe_variant_block stmpe1600_blocks[] = {
579 {
580 .cell = &stmpe_gpio_cell,
581 .irq = 0,
582 .block = STMPE_BLOCK_GPIO,
583 },
584 };
585
586 static int stmpe1600_enable(struct stmpe *stmpe, unsigned int blocks,
587 bool enable)
588 {
589 if (blocks & STMPE_BLOCK_GPIO)
590 return 0;
591 else
592 return -EINVAL;
593 }
594
595 static struct stmpe_variant_info stmpe1600 = {
596 .name = "stmpe1600",
597 .id_val = STMPE1600_ID,
598 .id_mask = 0xffff,
599 .num_gpios = 16,
600 .af_bits = 0,
601 .regs = stmpe1600_regs,
602 .blocks = stmpe1600_blocks,
603 .num_blocks = ARRAY_SIZE(stmpe1600_blocks),
604 .num_irqs = STMPE1600_NR_INTERNAL_IRQS,
605 .enable = stmpe1600_enable,
606 };
607
608 /*
609 * STMPE1601
610 */
611
612 static const u8 stmpe1601_regs[] = {
613 [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID,
614 [STMPE_IDX_SYS_CTRL] = STMPE1601_REG_SYS_CTRL,
615 [STMPE_IDX_SYS_CTRL2] = STMPE1601_REG_SYS_CTRL2,
616 [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB,
617 [STMPE_IDX_IER_MSB] = STMPE1601_REG_IER_MSB,
618 [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB,
619 [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB,
620 [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB,
621 [STMPE_IDX_GPMR_CSB] = STMPE1601_REG_GPIO_MP_MSB,
622 [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB,
623 [STMPE_IDX_GPSR_CSB] = STMPE1601_REG_GPIO_SET_MSB,
624 [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB,
625 [STMPE_IDX_GPCR_CSB] = STMPE1601_REG_GPIO_CLR_MSB,
626 [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB,
627 [STMPE_IDX_GPDR_CSB] = STMPE1601_REG_GPIO_SET_DIR_MSB,
628 [STMPE_IDX_GPEDR_LSB] = STMPE1601_REG_GPIO_ED_LSB,
629 [STMPE_IDX_GPEDR_CSB] = STMPE1601_REG_GPIO_ED_MSB,
630 [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB,
631 [STMPE_IDX_GPRER_CSB] = STMPE1601_REG_GPIO_RE_MSB,
632 [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB,
633 [STMPE_IDX_GPFER_CSB] = STMPE1601_REG_GPIO_FE_MSB,
634 [STMPE_IDX_GPPUR_LSB] = STMPE1601_REG_GPIO_PU_LSB,
635 [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB,
636 [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB,
637 [STMPE_IDX_IEGPIOR_CSB] = STMPE1601_REG_INT_EN_GPIO_MASK_MSB,
638 [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB,
639 };
640
641 static struct stmpe_variant_block stmpe1601_blocks[] = {
642 {
643 .cell = &stmpe_gpio_cell,
644 .irq = STMPE1601_IRQ_GPIOC,
645 .block = STMPE_BLOCK_GPIO,
646 },
647 {
648 .cell = &stmpe_keypad_cell,
649 .irq = STMPE1601_IRQ_KEYPAD,
650 .block = STMPE_BLOCK_KEYPAD,
651 },
652 {
653 .cell = &stmpe_pwm_cell,
654 .irq = STMPE1601_IRQ_PWM0,
655 .block = STMPE_BLOCK_PWM,
656 },
657 };
658
659 /* supported autosleep timeout delay (in msecs) */
660 static const int stmpe_autosleep_delay[] = {
661 4, 16, 32, 64, 128, 256, 512, 1024,
662 };
663
664 static int stmpe_round_timeout(int timeout)
665 {
666 int i;
667
668 for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) {
669 if (stmpe_autosleep_delay[i] >= timeout)
670 return i;
671 }
672
673 /*
674 * requests for delays longer than supported should not return the
675 * longest supported delay
676 */
677 return -EINVAL;
678 }
679
680 static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout)
681 {
682 int ret;
683
684 if (!stmpe->variant->enable_autosleep)
685 return -ENOSYS;
686
687 mutex_lock(&stmpe->lock);
688 ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout);
689 mutex_unlock(&stmpe->lock);
690
691 return ret;
692 }
693
694 /*
695 * Both stmpe 1601/2403 support same layout for autosleep
696 */
697 static int stmpe1601_autosleep(struct stmpe *stmpe,
698 int autosleep_timeout)
699 {
700 int ret, timeout;
701
702 /* choose the best available timeout */
703 timeout = stmpe_round_timeout(autosleep_timeout);
704 if (timeout < 0) {
705 dev_err(stmpe->dev, "invalid timeout\n");
706 return timeout;
707 }
708
709 ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2],
710 STMPE1601_AUTOSLEEP_TIMEOUT_MASK,
711 timeout);
712 if (ret < 0)
713 return ret;
714
715 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2],
716 STPME1601_AUTOSLEEP_ENABLE,
717 STPME1601_AUTOSLEEP_ENABLE);
718 }
719
720 static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks,
721 bool enable)
722 {
723 unsigned int mask = 0;
724
725 if (blocks & STMPE_BLOCK_GPIO)
726 mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO;
727 else
728 mask &= ~STMPE1601_SYS_CTRL_ENABLE_GPIO;
729
730 if (blocks & STMPE_BLOCK_KEYPAD)
731 mask |= STMPE1601_SYS_CTRL_ENABLE_KPC;
732 else
733 mask &= ~STMPE1601_SYS_CTRL_ENABLE_KPC;
734
735 if (blocks & STMPE_BLOCK_PWM)
736 mask |= STMPE1601_SYS_CTRL_ENABLE_SPWM;
737 else
738 mask &= ~STMPE1601_SYS_CTRL_ENABLE_SPWM;
739
740 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask,
741 enable ? mask : 0);
742 }
743
744 static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
745 {
746 switch (block) {
747 case STMPE_BLOCK_PWM:
748 return 2;
749
750 case STMPE_BLOCK_KEYPAD:
751 return 1;
752
753 case STMPE_BLOCK_GPIO:
754 default:
755 return 0;
756 }
757 }
758
759 static struct stmpe_variant_info stmpe1601 = {
760 .name = "stmpe1601",
761 .id_val = 0x0210,
762 .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */
763 .num_gpios = 16,
764 .af_bits = 2,
765 .regs = stmpe1601_regs,
766 .blocks = stmpe1601_blocks,
767 .num_blocks = ARRAY_SIZE(stmpe1601_blocks),
768 .num_irqs = STMPE1601_NR_INTERNAL_IRQS,
769 .enable = stmpe1601_enable,
770 .get_altfunc = stmpe1601_get_altfunc,
771 .enable_autosleep = stmpe1601_autosleep,
772 };
773
774 /*
775 * STMPE1801
776 */
777 static const u8 stmpe1801_regs[] = {
778 [STMPE_IDX_CHIP_ID] = STMPE1801_REG_CHIP_ID,
779 [STMPE_IDX_SYS_CTRL] = STMPE1801_REG_SYS_CTRL,
780 [STMPE_IDX_ICR_LSB] = STMPE1801_REG_INT_CTRL_LOW,
781 [STMPE_IDX_IER_LSB] = STMPE1801_REG_INT_EN_MASK_LOW,
782 [STMPE_IDX_ISR_LSB] = STMPE1801_REG_INT_STA_LOW,
783 [STMPE_IDX_GPMR_LSB] = STMPE1801_REG_GPIO_MP_LOW,
784 [STMPE_IDX_GPMR_CSB] = STMPE1801_REG_GPIO_MP_MID,
785 [STMPE_IDX_GPMR_MSB] = STMPE1801_REG_GPIO_MP_HIGH,
786 [STMPE_IDX_GPSR_LSB] = STMPE1801_REG_GPIO_SET_LOW,
787 [STMPE_IDX_GPSR_CSB] = STMPE1801_REG_GPIO_SET_MID,
788 [STMPE_IDX_GPSR_MSB] = STMPE1801_REG_GPIO_SET_HIGH,
789 [STMPE_IDX_GPCR_LSB] = STMPE1801_REG_GPIO_CLR_LOW,
790 [STMPE_IDX_GPCR_CSB] = STMPE1801_REG_GPIO_CLR_MID,
791 [STMPE_IDX_GPCR_MSB] = STMPE1801_REG_GPIO_CLR_HIGH,
792 [STMPE_IDX_GPDR_LSB] = STMPE1801_REG_GPIO_SET_DIR_LOW,
793 [STMPE_IDX_GPDR_CSB] = STMPE1801_REG_GPIO_SET_DIR_MID,
794 [STMPE_IDX_GPDR_MSB] = STMPE1801_REG_GPIO_SET_DIR_HIGH,
795 [STMPE_IDX_GPRER_LSB] = STMPE1801_REG_GPIO_RE_LOW,
796 [STMPE_IDX_GPRER_CSB] = STMPE1801_REG_GPIO_RE_MID,
797 [STMPE_IDX_GPRER_MSB] = STMPE1801_REG_GPIO_RE_HIGH,
798 [STMPE_IDX_GPFER_LSB] = STMPE1801_REG_GPIO_FE_LOW,
799 [STMPE_IDX_GPFER_CSB] = STMPE1801_REG_GPIO_FE_MID,
800 [STMPE_IDX_GPFER_MSB] = STMPE1801_REG_GPIO_FE_HIGH,
801 [STMPE_IDX_GPPUR_LSB] = STMPE1801_REG_GPIO_PULL_UP_LOW,
802 [STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW,
803 [STMPE_IDX_IEGPIOR_CSB] = STMPE1801_REG_INT_EN_GPIO_MASK_MID,
804 [STMPE_IDX_IEGPIOR_MSB] = STMPE1801_REG_INT_EN_GPIO_MASK_HIGH,
805 [STMPE_IDX_ISGPIOR_MSB] = STMPE1801_REG_INT_STA_GPIO_HIGH,
806 };
807
808 static struct stmpe_variant_block stmpe1801_blocks[] = {
809 {
810 .cell = &stmpe_gpio_cell,
811 .irq = STMPE1801_IRQ_GPIOC,
812 .block = STMPE_BLOCK_GPIO,
813 },
814 {
815 .cell = &stmpe_keypad_cell,
816 .irq = STMPE1801_IRQ_KEYPAD,
817 .block = STMPE_BLOCK_KEYPAD,
818 },
819 };
820
821 static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks,
822 bool enable)
823 {
824 unsigned int mask = 0;
825 if (blocks & STMPE_BLOCK_GPIO)
826 mask |= STMPE1801_MSK_INT_EN_GPIO;
827
828 if (blocks & STMPE_BLOCK_KEYPAD)
829 mask |= STMPE1801_MSK_INT_EN_KPC;
830
831 return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask,
832 enable ? mask : 0);
833 }
834
835 static int stmpe_reset(struct stmpe *stmpe)
836 {
837 u16 id_val = stmpe->variant->id_val;
838 unsigned long timeout;
839 int ret = 0;
840 u8 reset_bit;
841
842 if (id_val == STMPE811_ID)
843 /* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */
844 reset_bit = STMPE811_SYS_CTRL_RESET;
845 else
846 /* all other STMPE variant use bit 7 of SYS_CTRL register */
847 reset_bit = STMPE_SYS_CTRL_RESET;
848
849 ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL],
850 reset_bit, reset_bit);
851 if (ret < 0)
852 return ret;
853
854 timeout = jiffies + msecs_to_jiffies(100);
855 while (time_before(jiffies, timeout)) {
856 ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]);
857 if (ret < 0)
858 return ret;
859 if (!(ret & reset_bit))
860 return 0;
861 usleep_range(100, 200);
862 }
863 return -EIO;
864 }
865
866 static struct stmpe_variant_info stmpe1801 = {
867 .name = "stmpe1801",
868 .id_val = STMPE1801_ID,
869 .id_mask = 0xfff0,
870 .num_gpios = 18,
871 .af_bits = 0,
872 .regs = stmpe1801_regs,
873 .blocks = stmpe1801_blocks,
874 .num_blocks = ARRAY_SIZE(stmpe1801_blocks),
875 .num_irqs = STMPE1801_NR_INTERNAL_IRQS,
876 .enable = stmpe1801_enable,
877 /* stmpe1801 do not have any gpio alternate function */
878 .get_altfunc = NULL,
879 };
880
881 /*
882 * STMPE24XX
883 */
884
885 static const u8 stmpe24xx_regs[] = {
886 [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID,
887 [STMPE_IDX_SYS_CTRL] = STMPE24XX_REG_SYS_CTRL,
888 [STMPE_IDX_SYS_CTRL2] = STMPE24XX_REG_SYS_CTRL2,
889 [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB,
890 [STMPE_IDX_IER_MSB] = STMPE24XX_REG_IER_MSB,
891 [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB,
892 [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB,
893 [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB,
894 [STMPE_IDX_GPMR_CSB] = STMPE24XX_REG_GPMR_CSB,
895 [STMPE_IDX_GPMR_MSB] = STMPE24XX_REG_GPMR_MSB,
896 [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB,
897 [STMPE_IDX_GPSR_CSB] = STMPE24XX_REG_GPSR_CSB,
898 [STMPE_IDX_GPSR_MSB] = STMPE24XX_REG_GPSR_MSB,
899 [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB,
900 [STMPE_IDX_GPCR_CSB] = STMPE24XX_REG_GPCR_CSB,
901 [STMPE_IDX_GPCR_MSB] = STMPE24XX_REG_GPCR_MSB,
902 [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB,
903 [STMPE_IDX_GPDR_CSB] = STMPE24XX_REG_GPDR_CSB,
904 [STMPE_IDX_GPDR_MSB] = STMPE24XX_REG_GPDR_MSB,
905 [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB,
906 [STMPE_IDX_GPRER_CSB] = STMPE24XX_REG_GPRER_CSB,
907 [STMPE_IDX_GPRER_MSB] = STMPE24XX_REG_GPRER_MSB,
908 [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB,
909 [STMPE_IDX_GPFER_CSB] = STMPE24XX_REG_GPFER_CSB,
910 [STMPE_IDX_GPFER_MSB] = STMPE24XX_REG_GPFER_MSB,
911 [STMPE_IDX_GPPUR_LSB] = STMPE24XX_REG_GPPUR_LSB,
912 [STMPE_IDX_GPPDR_LSB] = STMPE24XX_REG_GPPDR_LSB,
913 [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB,
914 [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB,
915 [STMPE_IDX_IEGPIOR_CSB] = STMPE24XX_REG_IEGPIOR_CSB,
916 [STMPE_IDX_IEGPIOR_MSB] = STMPE24XX_REG_IEGPIOR_MSB,
917 [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB,
918 [STMPE_IDX_GPEDR_LSB] = STMPE24XX_REG_GPEDR_LSB,
919 [STMPE_IDX_GPEDR_CSB] = STMPE24XX_REG_GPEDR_CSB,
920 [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB,
921 };
922
923 static struct stmpe_variant_block stmpe24xx_blocks[] = {
924 {
925 .cell = &stmpe_gpio_cell,
926 .irq = STMPE24XX_IRQ_GPIOC,
927 .block = STMPE_BLOCK_GPIO,
928 },
929 {
930 .cell = &stmpe_keypad_cell,
931 .irq = STMPE24XX_IRQ_KEYPAD,
932 .block = STMPE_BLOCK_KEYPAD,
933 },
934 {
935 .cell = &stmpe_pwm_cell,
936 .irq = STMPE24XX_IRQ_PWM0,
937 .block = STMPE_BLOCK_PWM,
938 },
939 };
940
941 static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks,
942 bool enable)
943 {
944 unsigned int mask = 0;
945
946 if (blocks & STMPE_BLOCK_GPIO)
947 mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO;
948
949 if (blocks & STMPE_BLOCK_KEYPAD)
950 mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC;
951
952 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask,
953 enable ? mask : 0);
954 }
955
956 static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
957 {
958 switch (block) {
959 case STMPE_BLOCK_ROTATOR:
960 return 2;
961
962 case STMPE_BLOCK_KEYPAD:
963 case STMPE_BLOCK_PWM:
964 return 1;
965
966 case STMPE_BLOCK_GPIO:
967 default:
968 return 0;
969 }
970 }
971
972 static struct stmpe_variant_info stmpe2401 = {
973 .name = "stmpe2401",
974 .id_val = 0x0101,
975 .id_mask = 0xffff,
976 .num_gpios = 24,
977 .af_bits = 2,
978 .regs = stmpe24xx_regs,
979 .blocks = stmpe24xx_blocks,
980 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
981 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
982 .enable = stmpe24xx_enable,
983 .get_altfunc = stmpe24xx_get_altfunc,
984 };
985
986 static struct stmpe_variant_info stmpe2403 = {
987 .name = "stmpe2403",
988 .id_val = 0x0120,
989 .id_mask = 0xffff,
990 .num_gpios = 24,
991 .af_bits = 2,
992 .regs = stmpe24xx_regs,
993 .blocks = stmpe24xx_blocks,
994 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
995 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
996 .enable = stmpe24xx_enable,
997 .get_altfunc = stmpe24xx_get_altfunc,
998 .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */
999 };
1000
1001 static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
1002 [STMPE610] = &stmpe610,
1003 [STMPE801] = &stmpe801,
1004 [STMPE811] = &stmpe811,
1005 [STMPE1600] = &stmpe1600,
1006 [STMPE1601] = &stmpe1601,
1007 [STMPE1801] = &stmpe1801,
1008 [STMPE2401] = &stmpe2401,
1009 [STMPE2403] = &stmpe2403,
1010 };
1011
1012 /*
1013 * These devices can be connected in a 'no-irq' configuration - the irq pin
1014 * is not used and the device cannot interrupt the CPU. Here we only list
1015 * devices which support this configuration - the driver will fail probing
1016 * for any devices not listed here which are configured in this way.
1017 */
1018 static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = {
1019 [STMPE801] = &stmpe801_noirq,
1020 };
1021
1022 static irqreturn_t stmpe_irq(int irq, void *data)
1023 {
1024 struct stmpe *stmpe = data;
1025 struct stmpe_variant_info *variant = stmpe->variant;
1026 int num = DIV_ROUND_UP(variant->num_irqs, 8);
1027 u8 israddr;
1028 u8 isr[3];
1029 int ret;
1030 int i;
1031
1032 if (variant->id_val == STMPE801_ID ||
1033 variant->id_val == STMPE1600_ID) {
1034 int base = irq_create_mapping(stmpe->domain, 0);
1035
1036 handle_nested_irq(base);
1037 return IRQ_HANDLED;
1038 }
1039
1040 if (variant->id_val == STMPE1801_ID)
1041 israddr = stmpe->regs[STMPE_IDX_ISR_LSB];
1042 else
1043 israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
1044
1045 ret = stmpe_block_read(stmpe, israddr, num, isr);
1046 if (ret < 0)
1047 return IRQ_NONE;
1048
1049 for (i = 0; i < num; i++) {
1050 int bank = num - i - 1;
1051 u8 status = isr[i];
1052 u8 clear;
1053
1054 status &= stmpe->ier[bank];
1055 if (!status)
1056 continue;
1057
1058 clear = status;
1059 while (status) {
1060 int bit = __ffs(status);
1061 int line = bank * 8 + bit;
1062 int nestedirq = irq_create_mapping(stmpe->domain, line);
1063
1064 handle_nested_irq(nestedirq);
1065 status &= ~(1 << bit);
1066 }
1067
1068 stmpe_reg_write(stmpe, israddr + i, clear);
1069 }
1070
1071 return IRQ_HANDLED;
1072 }
1073
1074 static void stmpe_irq_lock(struct irq_data *data)
1075 {
1076 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1077
1078 mutex_lock(&stmpe->irq_lock);
1079 }
1080
1081 static void stmpe_irq_sync_unlock(struct irq_data *data)
1082 {
1083 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1084 struct stmpe_variant_info *variant = stmpe->variant;
1085 int num = DIV_ROUND_UP(variant->num_irqs, 8);
1086 int i;
1087
1088 for (i = 0; i < num; i++) {
1089 u8 new = stmpe->ier[i];
1090 u8 old = stmpe->oldier[i];
1091
1092 if (new == old)
1093 continue;
1094
1095 stmpe->oldier[i] = new;
1096 stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB + i], new);
1097 }
1098
1099 mutex_unlock(&stmpe->irq_lock);
1100 }
1101
1102 static void stmpe_irq_mask(struct irq_data *data)
1103 {
1104 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1105 int offset = data->hwirq;
1106 int regoffset = offset / 8;
1107 int mask = 1 << (offset % 8);
1108
1109 stmpe->ier[regoffset] &= ~mask;
1110 }
1111
1112 static void stmpe_irq_unmask(struct irq_data *data)
1113 {
1114 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
1115 int offset = data->hwirq;
1116 int regoffset = offset / 8;
1117 int mask = 1 << (offset % 8);
1118
1119 stmpe->ier[regoffset] |= mask;
1120 }
1121
1122 static struct irq_chip stmpe_irq_chip = {
1123 .name = "stmpe",
1124 .irq_bus_lock = stmpe_irq_lock,
1125 .irq_bus_sync_unlock = stmpe_irq_sync_unlock,
1126 .irq_mask = stmpe_irq_mask,
1127 .irq_unmask = stmpe_irq_unmask,
1128 };
1129
1130 static int stmpe_irq_map(struct irq_domain *d, unsigned int virq,
1131 irq_hw_number_t hwirq)
1132 {
1133 struct stmpe *stmpe = d->host_data;
1134 struct irq_chip *chip = NULL;
1135
1136 if (stmpe->variant->id_val != STMPE801_ID)
1137 chip = &stmpe_irq_chip;
1138
1139 irq_set_chip_data(virq, stmpe);
1140 irq_set_chip_and_handler(virq, chip, handle_edge_irq);
1141 irq_set_nested_thread(virq, 1);
1142 irq_set_noprobe(virq);
1143
1144 return 0;
1145 }
1146
1147 static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq)
1148 {
1149 irq_set_chip_and_handler(virq, NULL, NULL);
1150 irq_set_chip_data(virq, NULL);
1151 }
1152
1153 static const struct irq_domain_ops stmpe_irq_ops = {
1154 .map = stmpe_irq_map,
1155 .unmap = stmpe_irq_unmap,
1156 .xlate = irq_domain_xlate_twocell,
1157 };
1158
1159 static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np)
1160 {
1161 int base = 0;
1162 int num_irqs = stmpe->variant->num_irqs;
1163
1164 stmpe->domain = irq_domain_add_simple(np, num_irqs, base,
1165 &stmpe_irq_ops, stmpe);
1166 if (!stmpe->domain) {
1167 dev_err(stmpe->dev, "Failed to create irqdomain\n");
1168 return -ENOSYS;
1169 }
1170
1171 return 0;
1172 }
1173
1174 static int stmpe_chip_init(struct stmpe *stmpe)
1175 {
1176 unsigned int irq_trigger = stmpe->pdata->irq_trigger;
1177 int autosleep_timeout = stmpe->pdata->autosleep_timeout;
1178 struct stmpe_variant_info *variant = stmpe->variant;
1179 u8 icr = 0;
1180 unsigned int id;
1181 u8 data[2];
1182 int ret;
1183
1184 ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID],
1185 ARRAY_SIZE(data), data);
1186 if (ret < 0)
1187 return ret;
1188
1189 id = (data[0] << 8) | data[1];
1190 if ((id & variant->id_mask) != variant->id_val) {
1191 dev_err(stmpe->dev, "unknown chip id: %#x\n", id);
1192 return -EINVAL;
1193 }
1194
1195 dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id);
1196
1197 /* Disable all modules -- subdrivers should enable what they need. */
1198 ret = stmpe_disable(stmpe, ~0);
1199 if (ret)
1200 return ret;
1201
1202 ret = stmpe_reset(stmpe);
1203 if (ret < 0)
1204 return ret;
1205
1206 if (stmpe->irq >= 0) {
1207 if (id == STMPE801_ID || id == STMPE1600_ID)
1208 icr = STMPE_SYS_CTRL_INT_EN;
1209 else
1210 icr = STMPE_ICR_LSB_GIM;
1211
1212 /* STMPE801 and STMPE1600 don't support Edge interrupts */
1213 if (id != STMPE801_ID && id != STMPE1600_ID) {
1214 if (irq_trigger == IRQF_TRIGGER_FALLING ||
1215 irq_trigger == IRQF_TRIGGER_RISING)
1216 icr |= STMPE_ICR_LSB_EDGE;
1217 }
1218
1219 if (irq_trigger == IRQF_TRIGGER_RISING ||
1220 irq_trigger == IRQF_TRIGGER_HIGH) {
1221 if (id == STMPE801_ID || id == STMPE1600_ID)
1222 icr |= STMPE_SYS_CTRL_INT_HI;
1223 else
1224 icr |= STMPE_ICR_LSB_HIGH;
1225 }
1226 }
1227
1228 if (stmpe->pdata->autosleep) {
1229 ret = stmpe_autosleep(stmpe, autosleep_timeout);
1230 if (ret)
1231 return ret;
1232 }
1233
1234 return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);
1235 }
1236
1237 static int stmpe_add_device(struct stmpe *stmpe, const struct mfd_cell *cell)
1238 {
1239 return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,
1240 NULL, 0, stmpe->domain);
1241 }
1242
1243 static int stmpe_devices_init(struct stmpe *stmpe)
1244 {
1245 struct stmpe_variant_info *variant = stmpe->variant;
1246 unsigned int platform_blocks = stmpe->pdata->blocks;
1247 int ret = -EINVAL;
1248 int i, j;
1249
1250 for (i = 0; i < variant->num_blocks; i++) {
1251 struct stmpe_variant_block *block = &variant->blocks[i];
1252
1253 if (!(platform_blocks & block->block))
1254 continue;
1255
1256 for (j = 0; j < block->cell->num_resources; j++) {
1257 struct resource *res =
1258 (struct resource *) &block->cell->resources[j];
1259
1260 /* Dynamically fill in a variant's IRQ. */
1261 if (res->flags & IORESOURCE_IRQ)
1262 res->start = res->end = block->irq + j;
1263 }
1264
1265 platform_blocks &= ~block->block;
1266 ret = stmpe_add_device(stmpe, block->cell);
1267 if (ret)
1268 return ret;
1269 }
1270
1271 if (platform_blocks)
1272 dev_warn(stmpe->dev,
1273 "platform wants blocks (%#x) not present on variant",
1274 platform_blocks);
1275
1276 return ret;
1277 }
1278
1279 static void stmpe_of_probe(struct stmpe_platform_data *pdata,
1280 struct device_node *np)
1281 {
1282 struct device_node *child;
1283
1284 pdata->id = of_alias_get_id(np, "stmpe-i2c");
1285 if (pdata->id < 0)
1286 pdata->id = -1;
1287
1288 pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0,
1289 &pdata->irq_trigger);
1290 if (gpio_is_valid(pdata->irq_gpio))
1291 pdata->irq_over_gpio = 1;
1292 else
1293 pdata->irq_trigger = IRQF_TRIGGER_NONE;
1294
1295 of_property_read_u32(np, "st,autosleep-timeout",
1296 &pdata->autosleep_timeout);
1297
1298 pdata->autosleep = (pdata->autosleep_timeout) ? true : false;
1299
1300 for_each_child_of_node(np, child) {
1301 if (!strcmp(child->name, "stmpe_gpio")) {
1302 pdata->blocks |= STMPE_BLOCK_GPIO;
1303 } else if (!strcmp(child->name, "stmpe_keypad")) {
1304 pdata->blocks |= STMPE_BLOCK_KEYPAD;
1305 } else if (!strcmp(child->name, "stmpe_touchscreen")) {
1306 pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN;
1307 } else if (!strcmp(child->name, "stmpe_adc")) {
1308 pdata->blocks |= STMPE_BLOCK_ADC;
1309 } else if (!strcmp(child->name, "stmpe_pwm")) {
1310 pdata->blocks |= STMPE_BLOCK_PWM;
1311 } else if (!strcmp(child->name, "stmpe_rotator")) {
1312 pdata->blocks |= STMPE_BLOCK_ROTATOR;
1313 }
1314 }
1315 }
1316
1317 /* Called from client specific probe routines */
1318 int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum)
1319 {
1320 struct stmpe_platform_data *pdata;
1321 struct device_node *np = ci->dev->of_node;
1322 struct stmpe *stmpe;
1323 int ret;
1324
1325 pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL);
1326 if (!pdata)
1327 return -ENOMEM;
1328
1329 stmpe_of_probe(pdata, np);
1330
1331 if (of_find_property(np, "interrupts", NULL) == NULL)
1332 ci->irq = -1;
1333
1334 stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL);
1335 if (!stmpe)
1336 return -ENOMEM;
1337
1338 mutex_init(&stmpe->irq_lock);
1339 mutex_init(&stmpe->lock);
1340
1341 stmpe->dev = ci->dev;
1342 stmpe->client = ci->client;
1343 stmpe->pdata = pdata;
1344 stmpe->ci = ci;
1345 stmpe->partnum = partnum;
1346 stmpe->variant = stmpe_variant_info[partnum];
1347 stmpe->regs = stmpe->variant->regs;
1348 stmpe->num_gpios = stmpe->variant->num_gpios;
1349 stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc");
1350 if (!IS_ERR(stmpe->vcc)) {
1351 ret = regulator_enable(stmpe->vcc);
1352 if (ret)
1353 dev_warn(ci->dev, "failed to enable VCC supply\n");
1354 }
1355 stmpe->vio = devm_regulator_get_optional(ci->dev, "vio");
1356 if (!IS_ERR(stmpe->vio)) {
1357 ret = regulator_enable(stmpe->vio);
1358 if (ret)
1359 dev_warn(ci->dev, "failed to enable VIO supply\n");
1360 }
1361 dev_set_drvdata(stmpe->dev, stmpe);
1362
1363 if (ci->init)
1364 ci->init(stmpe);
1365
1366 if (pdata->irq_over_gpio) {
1367 ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio,
1368 GPIOF_DIR_IN, "stmpe");
1369 if (ret) {
1370 dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
1371 ret);
1372 return ret;
1373 }
1374
1375 stmpe->irq = gpio_to_irq(pdata->irq_gpio);
1376 } else {
1377 stmpe->irq = ci->irq;
1378 }
1379
1380 if (stmpe->irq < 0) {
1381 /* use alternate variant info for no-irq mode, if supported */
1382 dev_info(stmpe->dev,
1383 "%s configured in no-irq mode by platform data\n",
1384 stmpe->variant->name);
1385 if (!stmpe_noirq_variant_info[stmpe->partnum]) {
1386 dev_err(stmpe->dev,
1387 "%s does not support no-irq mode!\n",
1388 stmpe->variant->name);
1389 return -ENODEV;
1390 }
1391 stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
1392 } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
1393 pdata->irq_trigger = irq_get_trigger_type(stmpe->irq);
1394 }
1395
1396 ret = stmpe_chip_init(stmpe);
1397 if (ret)
1398 return ret;
1399
1400 if (stmpe->irq >= 0) {
1401 ret = stmpe_irq_init(stmpe, np);
1402 if (ret)
1403 return ret;
1404
1405 ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL,
1406 stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT,
1407 "stmpe", stmpe);
1408 if (ret) {
1409 dev_err(stmpe->dev, "failed to request IRQ: %d\n",
1410 ret);
1411 return ret;
1412 }
1413 }
1414
1415 ret = stmpe_devices_init(stmpe);
1416 if (!ret)
1417 return 0;
1418
1419 dev_err(stmpe->dev, "failed to add children\n");
1420 mfd_remove_devices(stmpe->dev);
1421
1422 return ret;
1423 }
1424
1425 int stmpe_remove(struct stmpe *stmpe)
1426 {
1427 if (!IS_ERR(stmpe->vio))
1428 regulator_disable(stmpe->vio);
1429 if (!IS_ERR(stmpe->vcc))
1430 regulator_disable(stmpe->vcc);
1431
1432 mfd_remove_devices(stmpe->dev);
1433
1434 return 0;
1435 }
1436
1437 #ifdef CONFIG_PM
1438 static int stmpe_suspend(struct device *dev)
1439 {
1440 struct stmpe *stmpe = dev_get_drvdata(dev);
1441
1442 if (stmpe->irq >= 0 && device_may_wakeup(dev))
1443 enable_irq_wake(stmpe->irq);
1444
1445 return 0;
1446 }
1447
1448 static int stmpe_resume(struct device *dev)
1449 {
1450 struct stmpe *stmpe = dev_get_drvdata(dev);
1451
1452 if (stmpe->irq >= 0 && device_may_wakeup(dev))
1453 disable_irq_wake(stmpe->irq);
1454
1455 return 0;
1456 }
1457
1458 const struct dev_pm_ops stmpe_dev_pm_ops = {
1459 .suspend = stmpe_suspend,
1460 .resume = stmpe_resume,
1461 };
1462 #endif
Linux kernel stable tree