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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / mfd / stmpe.c
blob1aee3b3253fc99f094e17af03a196c3bef01a43f
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
Linux with added FPC-III support