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Rabin Vincent27e34992010-07-02 16:52:08 +05301/*
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05302 * ST Microelectronics MFD: stmpe's driver
3 *
Rabin Vincent27e34992010-07-02 16:52:08 +05304 * 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
Viresh Kumar73de16d2011-11-08 09:44:06 +053010#include <linux/gpio.h>
Samuel Ortizdba61c82011-12-20 18:34:36 +010011#include <linux/export.h>
Rabin Vincent27e34992010-07-02 16:52:08 +053012#include <linux/kernel.h>
Rabin Vincent27e34992010-07-02 16:52:08 +053013#include <linux/interrupt.h>
14#include <linux/irq.h>
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053015#include <linux/pm.h>
Rabin Vincent27e34992010-07-02 16:52:08 +053016#include <linux/slab.h>
Rabin Vincent27e34992010-07-02 16:52:08 +053017#include <linux/mfd/core.h>
Rabin Vincent27e34992010-07-02 16:52:08 +053018#include "stmpe.h"
19
20static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
21{
22 return stmpe->variant->enable(stmpe, blocks, true);
23}
24
25static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
26{
27 return stmpe->variant->enable(stmpe, blocks, false);
28}
29
30static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg)
31{
32 int ret;
33
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053034 ret = stmpe->ci->read_byte(stmpe, reg);
Rabin Vincent27e34992010-07-02 16:52:08 +053035 if (ret < 0)
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053036 dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret);
Rabin Vincent27e34992010-07-02 16:52:08 +053037
38 dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret);
39
40 return ret;
41}
42
43static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
44{
45 int ret;
46
47 dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val);
48
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053049 ret = stmpe->ci->write_byte(stmpe, reg, val);
Rabin Vincent27e34992010-07-02 16:52:08 +053050 if (ret < 0)
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053051 dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret);
Rabin Vincent27e34992010-07-02 16:52:08 +053052
53 return ret;
54}
55
56static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
57{
58 int ret;
59
60 ret = __stmpe_reg_read(stmpe, reg);
61 if (ret < 0)
62 return ret;
63
64 ret &= ~mask;
65 ret |= val;
66
67 return __stmpe_reg_write(stmpe, reg, ret);
68}
69
70static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length,
71 u8 *values)
72{
73 int ret;
74
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053075 ret = stmpe->ci->read_block(stmpe, reg, length, values);
Rabin Vincent27e34992010-07-02 16:52:08 +053076 if (ret < 0)
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053077 dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret);
Rabin Vincent27e34992010-07-02 16:52:08 +053078
79 dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret);
80 stmpe_dump_bytes("stmpe rd: ", values, length);
81
82 return ret;
83}
84
85static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
86 const u8 *values)
87{
88 int ret;
89
90 dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length);
91 stmpe_dump_bytes("stmpe wr: ", values, length);
92
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053093 ret = stmpe->ci->write_block(stmpe, reg, length, values);
Rabin Vincent27e34992010-07-02 16:52:08 +053094 if (ret < 0)
Viresh Kumar1a6e4b72011-11-17 11:02:20 +053095 dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret);
Rabin Vincent27e34992010-07-02 16:52:08 +053096
97 return ret;
98}
99
100/**
101 * stmpe_enable - enable blocks on an STMPE device
102 * @stmpe: Device to work on
103 * @blocks: Mask of blocks (enum stmpe_block values) to enable
104 */
105int stmpe_enable(struct stmpe *stmpe, unsigned int blocks)
106{
107 int ret;
108
109 mutex_lock(&stmpe->lock);
110 ret = __stmpe_enable(stmpe, blocks);
111 mutex_unlock(&stmpe->lock);
112
113 return ret;
114}
115EXPORT_SYMBOL_GPL(stmpe_enable);
116
117/**
118 * stmpe_disable - disable blocks on an STMPE device
119 * @stmpe: Device to work on
120 * @blocks: Mask of blocks (enum stmpe_block values) to enable
121 */
122int stmpe_disable(struct stmpe *stmpe, unsigned int blocks)
123{
124 int ret;
125
126 mutex_lock(&stmpe->lock);
127 ret = __stmpe_disable(stmpe, blocks);
128 mutex_unlock(&stmpe->lock);
129
130 return ret;
131}
132EXPORT_SYMBOL_GPL(stmpe_disable);
133
134/**
135 * stmpe_reg_read() - read a single STMPE register
136 * @stmpe: Device to read from
137 * @reg: Register to read
138 */
139int stmpe_reg_read(struct stmpe *stmpe, u8 reg)
140{
141 int ret;
142
143 mutex_lock(&stmpe->lock);
144 ret = __stmpe_reg_read(stmpe, reg);
145 mutex_unlock(&stmpe->lock);
146
147 return ret;
148}
149EXPORT_SYMBOL_GPL(stmpe_reg_read);
150
151/**
152 * stmpe_reg_write() - write a single STMPE register
153 * @stmpe: Device to write to
154 * @reg: Register to write
155 * @val: Value to write
156 */
157int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val)
158{
159 int ret;
160
161 mutex_lock(&stmpe->lock);
162 ret = __stmpe_reg_write(stmpe, reg, val);
163 mutex_unlock(&stmpe->lock);
164
165 return ret;
166}
167EXPORT_SYMBOL_GPL(stmpe_reg_write);
168
169/**
170 * stmpe_set_bits() - set the value of a bitfield in a STMPE register
171 * @stmpe: Device to write to
172 * @reg: Register to write
173 * @mask: Mask of bits to set
174 * @val: Value to set
175 */
176int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val)
177{
178 int ret;
179
180 mutex_lock(&stmpe->lock);
181 ret = __stmpe_set_bits(stmpe, reg, mask, val);
182 mutex_unlock(&stmpe->lock);
183
184 return ret;
185}
186EXPORT_SYMBOL_GPL(stmpe_set_bits);
187
188/**
189 * stmpe_block_read() - read multiple STMPE registers
190 * @stmpe: Device to read from
191 * @reg: First register
192 * @length: Number of registers
193 * @values: Buffer to write to
194 */
195int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values)
196{
197 int ret;
198
199 mutex_lock(&stmpe->lock);
200 ret = __stmpe_block_read(stmpe, reg, length, values);
201 mutex_unlock(&stmpe->lock);
202
203 return ret;
204}
205EXPORT_SYMBOL_GPL(stmpe_block_read);
206
207/**
208 * stmpe_block_write() - write multiple STMPE registers
209 * @stmpe: Device to write to
210 * @reg: First register
211 * @length: Number of registers
212 * @values: Values to write
213 */
214int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length,
215 const u8 *values)
216{
217 int ret;
218
219 mutex_lock(&stmpe->lock);
220 ret = __stmpe_block_write(stmpe, reg, length, values);
221 mutex_unlock(&stmpe->lock);
222
223 return ret;
224}
225EXPORT_SYMBOL_GPL(stmpe_block_write);
226
227/**
Om Prakash4dcaa6b2011-06-27 09:54:22 +0200228 * stmpe_set_altfunc()- set the alternate function for STMPE pins
Rabin Vincent27e34992010-07-02 16:52:08 +0530229 * @stmpe: Device to configure
230 * @pins: Bitmask of pins to affect
231 * @block: block to enable alternate functions for
232 *
233 * @pins is assumed to have a bit set for each of the bits whose alternate
234 * function is to be changed, numbered according to the GPIOXY numbers.
235 *
236 * If the GPIO module is not enabled, this function automatically enables it in
237 * order to perform the change.
238 */
239int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block)
240{
241 struct stmpe_variant_info *variant = stmpe->variant;
242 u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB];
243 int af_bits = variant->af_bits;
244 int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8);
Rabin Vincent27e34992010-07-02 16:52:08 +0530245 int mask = (1 << af_bits) - 1;
246 u8 regs[numregs];
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530247 int af, afperreg, ret;
Rabin Vincent27e34992010-07-02 16:52:08 +0530248
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530249 if (!variant->get_altfunc)
250 return 0;
251
252 afperreg = 8 / af_bits;
Rabin Vincent27e34992010-07-02 16:52:08 +0530253 mutex_lock(&stmpe->lock);
254
255 ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
256 if (ret < 0)
257 goto out;
258
259 ret = __stmpe_block_read(stmpe, regaddr, numregs, regs);
260 if (ret < 0)
261 goto out;
262
263 af = variant->get_altfunc(stmpe, block);
264
265 while (pins) {
266 int pin = __ffs(pins);
267 int regoffset = numregs - (pin / afperreg) - 1;
268 int pos = (pin % afperreg) * (8 / afperreg);
269
270 regs[regoffset] &= ~(mask << pos);
271 regs[regoffset] |= af << pos;
272
273 pins &= ~(1 << pin);
274 }
275
276 ret = __stmpe_block_write(stmpe, regaddr, numregs, regs);
277
278out:
279 mutex_unlock(&stmpe->lock);
280 return ret;
281}
282EXPORT_SYMBOL_GPL(stmpe_set_altfunc);
283
284/*
285 * GPIO (all variants)
286 */
287
288static struct resource stmpe_gpio_resources[] = {
289 /* Start and end filled dynamically */
290 {
291 .flags = IORESOURCE_IRQ,
292 },
293};
294
295static struct mfd_cell stmpe_gpio_cell = {
296 .name = "stmpe-gpio",
297 .resources = stmpe_gpio_resources,
298 .num_resources = ARRAY_SIZE(stmpe_gpio_resources),
299};
300
Chris Blaire31f9b82012-01-26 22:17:03 +0100301static struct mfd_cell stmpe_gpio_cell_noirq = {
302 .name = "stmpe-gpio",
303 /* gpio cell resources consist of an irq only so no resources here */
304};
305
Rabin Vincent27e34992010-07-02 16:52:08 +0530306/*
307 * Keypad (1601, 2401, 2403)
308 */
309
310static struct resource stmpe_keypad_resources[] = {
311 {
312 .name = "KEYPAD",
313 .start = 0,
314 .end = 0,
315 .flags = IORESOURCE_IRQ,
316 },
317 {
318 .name = "KEYPAD_OVER",
319 .start = 1,
320 .end = 1,
321 .flags = IORESOURCE_IRQ,
322 },
323};
324
325static struct mfd_cell stmpe_keypad_cell = {
326 .name = "stmpe-keypad",
327 .resources = stmpe_keypad_resources,
328 .num_resources = ARRAY_SIZE(stmpe_keypad_resources),
329};
330
331/*
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530332 * STMPE801
333 */
334static const u8 stmpe801_regs[] = {
335 [STMPE_IDX_CHIP_ID] = STMPE801_REG_CHIP_ID,
336 [STMPE_IDX_ICR_LSB] = STMPE801_REG_SYS_CTRL,
337 [STMPE_IDX_GPMR_LSB] = STMPE801_REG_GPIO_MP_STA,
338 [STMPE_IDX_GPSR_LSB] = STMPE801_REG_GPIO_SET_PIN,
339 [STMPE_IDX_GPCR_LSB] = STMPE801_REG_GPIO_SET_PIN,
340 [STMPE_IDX_GPDR_LSB] = STMPE801_REG_GPIO_DIR,
341 [STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN,
342 [STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA,
343
344};
345
346static struct stmpe_variant_block stmpe801_blocks[] = {
347 {
348 .cell = &stmpe_gpio_cell,
349 .irq = 0,
350 .block = STMPE_BLOCK_GPIO,
351 },
352};
353
Chris Blaire31f9b82012-01-26 22:17:03 +0100354static struct stmpe_variant_block stmpe801_blocks_noirq[] = {
355 {
356 .cell = &stmpe_gpio_cell_noirq,
357 .block = STMPE_BLOCK_GPIO,
358 },
359};
360
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530361static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks,
362 bool enable)
363{
364 if (blocks & STMPE_BLOCK_GPIO)
365 return 0;
366 else
367 return -EINVAL;
368}
369
370static struct stmpe_variant_info stmpe801 = {
371 .name = "stmpe801",
372 .id_val = STMPE801_ID,
373 .id_mask = 0xffff,
374 .num_gpios = 8,
375 .regs = stmpe801_regs,
376 .blocks = stmpe801_blocks,
377 .num_blocks = ARRAY_SIZE(stmpe801_blocks),
378 .num_irqs = STMPE801_NR_INTERNAL_IRQS,
379 .enable = stmpe801_enable,
380};
381
Chris Blaire31f9b82012-01-26 22:17:03 +0100382static struct stmpe_variant_info stmpe801_noirq = {
383 .name = "stmpe801",
384 .id_val = STMPE801_ID,
385 .id_mask = 0xffff,
386 .num_gpios = 8,
387 .regs = stmpe801_regs,
388 .blocks = stmpe801_blocks_noirq,
389 .num_blocks = ARRAY_SIZE(stmpe801_blocks_noirq),
390 .enable = stmpe801_enable,
391};
392
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530393/*
Viresh Kumar1cda2392011-11-17 11:02:22 +0530394 * Touchscreen (STMPE811 or STMPE610)
Rabin Vincent27e34992010-07-02 16:52:08 +0530395 */
396
397static struct resource stmpe_ts_resources[] = {
398 {
399 .name = "TOUCH_DET",
400 .start = 0,
401 .end = 0,
402 .flags = IORESOURCE_IRQ,
403 },
404 {
405 .name = "FIFO_TH",
406 .start = 1,
407 .end = 1,
408 .flags = IORESOURCE_IRQ,
409 },
410};
411
412static struct mfd_cell stmpe_ts_cell = {
413 .name = "stmpe-ts",
414 .resources = stmpe_ts_resources,
415 .num_resources = ARRAY_SIZE(stmpe_ts_resources),
416};
417
418/*
Viresh Kumar1cda2392011-11-17 11:02:22 +0530419 * STMPE811 or STMPE610
Rabin Vincent27e34992010-07-02 16:52:08 +0530420 */
421
422static const u8 stmpe811_regs[] = {
423 [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID,
424 [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL,
425 [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN,
426 [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA,
427 [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA,
428 [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN,
429 [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN,
430 [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR,
431 [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE,
432 [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE,
433 [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF,
434 [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN,
435 [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA,
436 [STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED,
437};
438
439static struct stmpe_variant_block stmpe811_blocks[] = {
440 {
441 .cell = &stmpe_gpio_cell,
442 .irq = STMPE811_IRQ_GPIOC,
443 .block = STMPE_BLOCK_GPIO,
444 },
445 {
446 .cell = &stmpe_ts_cell,
447 .irq = STMPE811_IRQ_TOUCH_DET,
448 .block = STMPE_BLOCK_TOUCHSCREEN,
449 },
450};
451
452static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks,
453 bool enable)
454{
455 unsigned int mask = 0;
456
457 if (blocks & STMPE_BLOCK_GPIO)
458 mask |= STMPE811_SYS_CTRL2_GPIO_OFF;
459
460 if (blocks & STMPE_BLOCK_ADC)
461 mask |= STMPE811_SYS_CTRL2_ADC_OFF;
462
463 if (blocks & STMPE_BLOCK_TOUCHSCREEN)
464 mask |= STMPE811_SYS_CTRL2_TSC_OFF;
465
466 return __stmpe_set_bits(stmpe, STMPE811_REG_SYS_CTRL2, mask,
467 enable ? 0 : mask);
468}
469
470static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
471{
472 /* 0 for touchscreen, 1 for GPIO */
473 return block != STMPE_BLOCK_TOUCHSCREEN;
474}
475
476static struct stmpe_variant_info stmpe811 = {
477 .name = "stmpe811",
478 .id_val = 0x0811,
479 .id_mask = 0xffff,
480 .num_gpios = 8,
481 .af_bits = 1,
482 .regs = stmpe811_regs,
483 .blocks = stmpe811_blocks,
484 .num_blocks = ARRAY_SIZE(stmpe811_blocks),
485 .num_irqs = STMPE811_NR_INTERNAL_IRQS,
486 .enable = stmpe811_enable,
487 .get_altfunc = stmpe811_get_altfunc,
488};
489
Viresh Kumar1cda2392011-11-17 11:02:22 +0530490/* Similar to 811, except number of gpios */
491static struct stmpe_variant_info stmpe610 = {
492 .name = "stmpe610",
493 .id_val = 0x0811,
494 .id_mask = 0xffff,
495 .num_gpios = 6,
496 .af_bits = 1,
497 .regs = stmpe811_regs,
498 .blocks = stmpe811_blocks,
499 .num_blocks = ARRAY_SIZE(stmpe811_blocks),
500 .num_irqs = STMPE811_NR_INTERNAL_IRQS,
501 .enable = stmpe811_enable,
502 .get_altfunc = stmpe811_get_altfunc,
503};
504
Rabin Vincent27e34992010-07-02 16:52:08 +0530505/*
506 * STMPE1601
507 */
508
509static const u8 stmpe1601_regs[] = {
510 [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID,
511 [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB,
512 [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB,
513 [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB,
514 [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB,
515 [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB,
516 [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB,
517 [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB,
518 [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB,
519 [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB,
520 [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB,
521 [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB,
522 [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB,
523 [STMPE_IDX_GPEDR_MSB] = STMPE1601_REG_GPIO_ED_MSB,
524};
525
526static struct stmpe_variant_block stmpe1601_blocks[] = {
527 {
528 .cell = &stmpe_gpio_cell,
529 .irq = STMPE24XX_IRQ_GPIOC,
530 .block = STMPE_BLOCK_GPIO,
531 },
532 {
533 .cell = &stmpe_keypad_cell,
534 .irq = STMPE24XX_IRQ_KEYPAD,
535 .block = STMPE_BLOCK_KEYPAD,
536 },
537};
538
Sundar R Iyer5981f4e2010-07-21 11:41:07 +0530539/* supported autosleep timeout delay (in msecs) */
540static const int stmpe_autosleep_delay[] = {
541 4, 16, 32, 64, 128, 256, 512, 1024,
542};
543
544static int stmpe_round_timeout(int timeout)
545{
546 int i;
547
548 for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) {
549 if (stmpe_autosleep_delay[i] >= timeout)
550 return i;
551 }
552
553 /*
554 * requests for delays longer than supported should not return the
555 * longest supported delay
556 */
557 return -EINVAL;
558}
559
560static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout)
561{
562 int ret;
563
564 if (!stmpe->variant->enable_autosleep)
565 return -ENOSYS;
566
567 mutex_lock(&stmpe->lock);
568 ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout);
569 mutex_unlock(&stmpe->lock);
570
571 return ret;
572}
573
574/*
575 * Both stmpe 1601/2403 support same layout for autosleep
576 */
577static int stmpe1601_autosleep(struct stmpe *stmpe,
578 int autosleep_timeout)
579{
580 int ret, timeout;
581
582 /* choose the best available timeout */
583 timeout = stmpe_round_timeout(autosleep_timeout);
584 if (timeout < 0) {
585 dev_err(stmpe->dev, "invalid timeout\n");
586 return timeout;
587 }
588
589 ret = __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2,
590 STMPE1601_AUTOSLEEP_TIMEOUT_MASK,
591 timeout);
592 if (ret < 0)
593 return ret;
594
595 return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2,
596 STPME1601_AUTOSLEEP_ENABLE,
597 STPME1601_AUTOSLEEP_ENABLE);
598}
599
Rabin Vincent27e34992010-07-02 16:52:08 +0530600static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks,
601 bool enable)
602{
603 unsigned int mask = 0;
604
605 if (blocks & STMPE_BLOCK_GPIO)
606 mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO;
607
608 if (blocks & STMPE_BLOCK_KEYPAD)
609 mask |= STMPE1601_SYS_CTRL_ENABLE_KPC;
610
611 return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL, mask,
612 enable ? mask : 0);
613}
614
615static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
616{
617 switch (block) {
618 case STMPE_BLOCK_PWM:
619 return 2;
620
621 case STMPE_BLOCK_KEYPAD:
622 return 1;
623
624 case STMPE_BLOCK_GPIO:
625 default:
626 return 0;
627 }
628}
629
630static struct stmpe_variant_info stmpe1601 = {
631 .name = "stmpe1601",
632 .id_val = 0x0210,
633 .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */
634 .num_gpios = 16,
635 .af_bits = 2,
636 .regs = stmpe1601_regs,
637 .blocks = stmpe1601_blocks,
638 .num_blocks = ARRAY_SIZE(stmpe1601_blocks),
639 .num_irqs = STMPE1601_NR_INTERNAL_IRQS,
640 .enable = stmpe1601_enable,
641 .get_altfunc = stmpe1601_get_altfunc,
Sundar R Iyer5981f4e2010-07-21 11:41:07 +0530642 .enable_autosleep = stmpe1601_autosleep,
Rabin Vincent27e34992010-07-02 16:52:08 +0530643};
644
645/*
646 * STMPE24XX
647 */
648
649static const u8 stmpe24xx_regs[] = {
650 [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID,
651 [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB,
652 [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB,
653 [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB,
654 [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB,
655 [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB,
656 [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB,
657 [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB,
658 [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB,
659 [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB,
660 [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB,
661 [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB,
662 [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB,
663 [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB,
664};
665
666static struct stmpe_variant_block stmpe24xx_blocks[] = {
667 {
668 .cell = &stmpe_gpio_cell,
669 .irq = STMPE24XX_IRQ_GPIOC,
670 .block = STMPE_BLOCK_GPIO,
671 },
672 {
673 .cell = &stmpe_keypad_cell,
674 .irq = STMPE24XX_IRQ_KEYPAD,
675 .block = STMPE_BLOCK_KEYPAD,
676 },
677};
678
679static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks,
680 bool enable)
681{
682 unsigned int mask = 0;
683
684 if (blocks & STMPE_BLOCK_GPIO)
685 mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO;
686
687 if (blocks & STMPE_BLOCK_KEYPAD)
688 mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC;
689
690 return __stmpe_set_bits(stmpe, STMPE24XX_REG_SYS_CTRL, mask,
691 enable ? mask : 0);
692}
693
694static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block)
695{
696 switch (block) {
697 case STMPE_BLOCK_ROTATOR:
698 return 2;
699
700 case STMPE_BLOCK_KEYPAD:
701 return 1;
702
703 case STMPE_BLOCK_GPIO:
704 default:
705 return 0;
706 }
707}
708
709static struct stmpe_variant_info stmpe2401 = {
710 .name = "stmpe2401",
711 .id_val = 0x0101,
712 .id_mask = 0xffff,
713 .num_gpios = 24,
714 .af_bits = 2,
715 .regs = stmpe24xx_regs,
716 .blocks = stmpe24xx_blocks,
717 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
718 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
719 .enable = stmpe24xx_enable,
720 .get_altfunc = stmpe24xx_get_altfunc,
721};
722
723static struct stmpe_variant_info stmpe2403 = {
724 .name = "stmpe2403",
725 .id_val = 0x0120,
726 .id_mask = 0xffff,
727 .num_gpios = 24,
728 .af_bits = 2,
729 .regs = stmpe24xx_regs,
730 .blocks = stmpe24xx_blocks,
731 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks),
732 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS,
733 .enable = stmpe24xx_enable,
734 .get_altfunc = stmpe24xx_get_altfunc,
Sundar R Iyer5981f4e2010-07-21 11:41:07 +0530735 .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */
Rabin Vincent27e34992010-07-02 16:52:08 +0530736};
737
Chris Blaire31f9b82012-01-26 22:17:03 +0100738static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = {
Viresh Kumar1cda2392011-11-17 11:02:22 +0530739 [STMPE610] = &stmpe610,
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530740 [STMPE801] = &stmpe801,
Rabin Vincent27e34992010-07-02 16:52:08 +0530741 [STMPE811] = &stmpe811,
742 [STMPE1601] = &stmpe1601,
743 [STMPE2401] = &stmpe2401,
744 [STMPE2403] = &stmpe2403,
745};
746
Chris Blaire31f9b82012-01-26 22:17:03 +0100747/*
748 * These devices can be connected in a 'no-irq' configuration - the irq pin
749 * is not used and the device cannot interrupt the CPU. Here we only list
750 * devices which support this configuration - the driver will fail probing
751 * for any devices not listed here which are configured in this way.
752 */
753static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = {
754 [STMPE801] = &stmpe801_noirq,
755};
756
Rabin Vincent27e34992010-07-02 16:52:08 +0530757static irqreturn_t stmpe_irq(int irq, void *data)
758{
759 struct stmpe *stmpe = data;
760 struct stmpe_variant_info *variant = stmpe->variant;
761 int num = DIV_ROUND_UP(variant->num_irqs, 8);
762 u8 israddr = stmpe->regs[STMPE_IDX_ISR_MSB];
763 u8 isr[num];
764 int ret;
765 int i;
766
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530767 if (variant->id_val == STMPE801_ID) {
768 handle_nested_irq(stmpe->irq_base);
769 return IRQ_HANDLED;
770 }
771
Rabin Vincent27e34992010-07-02 16:52:08 +0530772 ret = stmpe_block_read(stmpe, israddr, num, isr);
773 if (ret < 0)
774 return IRQ_NONE;
775
776 for (i = 0; i < num; i++) {
777 int bank = num - i - 1;
778 u8 status = isr[i];
779 u8 clear;
780
781 status &= stmpe->ier[bank];
782 if (!status)
783 continue;
784
785 clear = status;
786 while (status) {
787 int bit = __ffs(status);
788 int line = bank * 8 + bit;
789
790 handle_nested_irq(stmpe->irq_base + line);
791 status &= ~(1 << bit);
792 }
793
794 stmpe_reg_write(stmpe, israddr + i, clear);
795 }
796
797 return IRQ_HANDLED;
798}
799
Mark Brown43b8c082010-12-12 12:01:08 +0000800static void stmpe_irq_lock(struct irq_data *data)
Rabin Vincent27e34992010-07-02 16:52:08 +0530801{
Mark Brown43b8c082010-12-12 12:01:08 +0000802 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
Rabin Vincent27e34992010-07-02 16:52:08 +0530803
804 mutex_lock(&stmpe->irq_lock);
805}
806
Mark Brown43b8c082010-12-12 12:01:08 +0000807static void stmpe_irq_sync_unlock(struct irq_data *data)
Rabin Vincent27e34992010-07-02 16:52:08 +0530808{
Mark Brown43b8c082010-12-12 12:01:08 +0000809 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
Rabin Vincent27e34992010-07-02 16:52:08 +0530810 struct stmpe_variant_info *variant = stmpe->variant;
811 int num = DIV_ROUND_UP(variant->num_irqs, 8);
812 int i;
813
814 for (i = 0; i < num; i++) {
815 u8 new = stmpe->ier[i];
816 u8 old = stmpe->oldier[i];
817
818 if (new == old)
819 continue;
820
821 stmpe->oldier[i] = new;
822 stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB] - i, new);
823 }
824
825 mutex_unlock(&stmpe->irq_lock);
826}
827
Mark Brown43b8c082010-12-12 12:01:08 +0000828static void stmpe_irq_mask(struct irq_data *data)
Rabin Vincent27e34992010-07-02 16:52:08 +0530829{
Mark Brown43b8c082010-12-12 12:01:08 +0000830 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
831 int offset = data->irq - stmpe->irq_base;
Rabin Vincent27e34992010-07-02 16:52:08 +0530832 int regoffset = offset / 8;
833 int mask = 1 << (offset % 8);
834
835 stmpe->ier[regoffset] &= ~mask;
836}
837
Mark Brown43b8c082010-12-12 12:01:08 +0000838static void stmpe_irq_unmask(struct irq_data *data)
Rabin Vincent27e34992010-07-02 16:52:08 +0530839{
Mark Brown43b8c082010-12-12 12:01:08 +0000840 struct stmpe *stmpe = irq_data_get_irq_chip_data(data);
841 int offset = data->irq - stmpe->irq_base;
Rabin Vincent27e34992010-07-02 16:52:08 +0530842 int regoffset = offset / 8;
843 int mask = 1 << (offset % 8);
844
845 stmpe->ier[regoffset] |= mask;
846}
847
848static struct irq_chip stmpe_irq_chip = {
849 .name = "stmpe",
Mark Brown43b8c082010-12-12 12:01:08 +0000850 .irq_bus_lock = stmpe_irq_lock,
851 .irq_bus_sync_unlock = stmpe_irq_sync_unlock,
852 .irq_mask = stmpe_irq_mask,
853 .irq_unmask = stmpe_irq_unmask,
Rabin Vincent27e34992010-07-02 16:52:08 +0530854};
855
856static int __devinit stmpe_irq_init(struct stmpe *stmpe)
857{
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530858 struct irq_chip *chip = NULL;
Rabin Vincent27e34992010-07-02 16:52:08 +0530859 int num_irqs = stmpe->variant->num_irqs;
860 int base = stmpe->irq_base;
861 int irq;
862
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530863 if (stmpe->variant->id_val != STMPE801_ID)
864 chip = &stmpe_irq_chip;
865
Rabin Vincent27e34992010-07-02 16:52:08 +0530866 for (irq = base; irq < base + num_irqs; irq++) {
Thomas Gleixnerd5bb1222011-03-25 11:12:32 +0000867 irq_set_chip_data(irq, stmpe);
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530868 irq_set_chip_and_handler(irq, chip, handle_edge_irq);
Thomas Gleixnerd5bb1222011-03-25 11:12:32 +0000869 irq_set_nested_thread(irq, 1);
Rabin Vincent27e34992010-07-02 16:52:08 +0530870#ifdef CONFIG_ARM
871 set_irq_flags(irq, IRQF_VALID);
872#else
Thomas Gleixnerd5bb1222011-03-25 11:12:32 +0000873 irq_set_noprobe(irq);
Rabin Vincent27e34992010-07-02 16:52:08 +0530874#endif
875 }
876
877 return 0;
878}
879
880static void stmpe_irq_remove(struct stmpe *stmpe)
881{
882 int num_irqs = stmpe->variant->num_irqs;
883 int base = stmpe->irq_base;
884 int irq;
885
886 for (irq = base; irq < base + num_irqs; irq++) {
887#ifdef CONFIG_ARM
888 set_irq_flags(irq, 0);
889#endif
Thomas Gleixnerd5bb1222011-03-25 11:12:32 +0000890 irq_set_chip_and_handler(irq, NULL, NULL);
891 irq_set_chip_data(irq, NULL);
Rabin Vincent27e34992010-07-02 16:52:08 +0530892 }
893}
894
895static int __devinit stmpe_chip_init(struct stmpe *stmpe)
896{
897 unsigned int irq_trigger = stmpe->pdata->irq_trigger;
Sundar R Iyer5981f4e2010-07-21 11:41:07 +0530898 int autosleep_timeout = stmpe->pdata->autosleep_timeout;
Rabin Vincent27e34992010-07-02 16:52:08 +0530899 struct stmpe_variant_info *variant = stmpe->variant;
Chris Blaire31f9b82012-01-26 22:17:03 +0100900 u8 icr = 0;
Rabin Vincent27e34992010-07-02 16:52:08 +0530901 unsigned int id;
902 u8 data[2];
903 int ret;
904
905 ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID],
906 ARRAY_SIZE(data), data);
907 if (ret < 0)
908 return ret;
909
910 id = (data[0] << 8) | data[1];
911 if ((id & variant->id_mask) != variant->id_val) {
912 dev_err(stmpe->dev, "unknown chip id: %#x\n", id);
913 return -EINVAL;
914 }
915
916 dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id);
917
918 /* Disable all modules -- subdrivers should enable what they need. */
919 ret = stmpe_disable(stmpe, ~0);
920 if (ret)
921 return ret;
922
Chris Blaire31f9b82012-01-26 22:17:03 +0100923 if (stmpe->irq >= 0) {
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530924 if (id == STMPE801_ID)
Chris Blaire31f9b82012-01-26 22:17:03 +0100925 icr = STMPE801_REG_SYS_CTRL_INT_EN;
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530926 else
Chris Blaire31f9b82012-01-26 22:17:03 +0100927 icr = STMPE_ICR_LSB_GIM;
Rabin Vincent27e34992010-07-02 16:52:08 +0530928
Chris Blaire31f9b82012-01-26 22:17:03 +0100929 /* STMPE801 doesn't support Edge interrupts */
930 if (id != STMPE801_ID) {
931 if (irq_trigger == IRQF_TRIGGER_FALLING ||
932 irq_trigger == IRQF_TRIGGER_RISING)
933 icr |= STMPE_ICR_LSB_EDGE;
934 }
935
936 if (irq_trigger == IRQF_TRIGGER_RISING ||
937 irq_trigger == IRQF_TRIGGER_HIGH) {
938 if (id == STMPE801_ID)
939 icr |= STMPE801_REG_SYS_CTRL_INT_HI;
940 else
941 icr |= STMPE_ICR_LSB_HIGH;
942 }
943
944 if (stmpe->pdata->irq_invert_polarity) {
945 if (id == STMPE801_ID)
946 icr ^= STMPE801_REG_SYS_CTRL_INT_HI;
947 else
948 icr ^= STMPE_ICR_LSB_HIGH;
949 }
Viresh Kumar7f7f4ea2011-11-17 11:02:23 +0530950 }
Rabin Vincent27e34992010-07-02 16:52:08 +0530951
Sundar R Iyer5981f4e2010-07-21 11:41:07 +0530952 if (stmpe->pdata->autosleep) {
953 ret = stmpe_autosleep(stmpe, autosleep_timeout);
954 if (ret)
955 return ret;
956 }
957
Rabin Vincent27e34992010-07-02 16:52:08 +0530958 return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr);
959}
960
961static int __devinit stmpe_add_device(struct stmpe *stmpe,
962 struct mfd_cell *cell, int irq)
963{
964 return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1,
Mark Brown0848c942012-09-11 15:16:36 +0800965 NULL, stmpe->irq_base + irq, NULL);
Rabin Vincent27e34992010-07-02 16:52:08 +0530966}
967
968static int __devinit stmpe_devices_init(struct stmpe *stmpe)
969{
970 struct stmpe_variant_info *variant = stmpe->variant;
971 unsigned int platform_blocks = stmpe->pdata->blocks;
972 int ret = -EINVAL;
973 int i;
974
975 for (i = 0; i < variant->num_blocks; i++) {
976 struct stmpe_variant_block *block = &variant->blocks[i];
977
978 if (!(platform_blocks & block->block))
979 continue;
980
981 platform_blocks &= ~block->block;
982 ret = stmpe_add_device(stmpe, block->cell, block->irq);
983 if (ret)
984 return ret;
985 }
986
987 if (platform_blocks)
988 dev_warn(stmpe->dev,
989 "platform wants blocks (%#x) not present on variant",
990 platform_blocks);
991
992 return ret;
993}
994
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530995/* Called from client specific probe routines */
Samuel Ortiz8ad1a972011-12-20 18:35:55 +0100996int __devinit stmpe_probe(struct stmpe_client_info *ci, int partnum)
Sundar Iyer208c4342010-09-15 10:30:54 +0530997{
Viresh Kumar1a6e4b72011-11-17 11:02:20 +0530998 struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev);
Rabin Vincent27e34992010-07-02 16:52:08 +0530999 struct stmpe *stmpe;
1000 int ret;
1001
1002 if (!pdata)
1003 return -EINVAL;
1004
1005 stmpe = kzalloc(sizeof(struct stmpe), GFP_KERNEL);
1006 if (!stmpe)
1007 return -ENOMEM;
1008
1009 mutex_init(&stmpe->irq_lock);
1010 mutex_init(&stmpe->lock);
1011
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301012 stmpe->dev = ci->dev;
1013 stmpe->client = ci->client;
Rabin Vincent27e34992010-07-02 16:52:08 +05301014 stmpe->pdata = pdata;
1015 stmpe->irq_base = pdata->irq_base;
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301016 stmpe->ci = ci;
1017 stmpe->partnum = partnum;
1018 stmpe->variant = stmpe_variant_info[partnum];
Rabin Vincent27e34992010-07-02 16:52:08 +05301019 stmpe->regs = stmpe->variant->regs;
1020 stmpe->num_gpios = stmpe->variant->num_gpios;
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301021 dev_set_drvdata(stmpe->dev, stmpe);
Rabin Vincent27e34992010-07-02 16:52:08 +05301022
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301023 if (ci->init)
1024 ci->init(stmpe);
Rabin Vincent27e34992010-07-02 16:52:08 +05301025
Viresh Kumar73de16d2011-11-08 09:44:06 +05301026 if (pdata->irq_over_gpio) {
1027 ret = gpio_request_one(pdata->irq_gpio, GPIOF_DIR_IN, "stmpe");
1028 if (ret) {
1029 dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n",
1030 ret);
1031 goto out_free;
1032 }
1033
1034 stmpe->irq = gpio_to_irq(pdata->irq_gpio);
1035 } else {
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301036 stmpe->irq = ci->irq;
Viresh Kumar73de16d2011-11-08 09:44:06 +05301037 }
1038
Chris Blaire31f9b82012-01-26 22:17:03 +01001039 if (stmpe->irq < 0) {
1040 /* use alternate variant info for no-irq mode, if supported */
1041 dev_info(stmpe->dev,
1042 "%s configured in no-irq mode by platform data\n",
1043 stmpe->variant->name);
1044 if (!stmpe_noirq_variant_info[stmpe->partnum]) {
1045 dev_err(stmpe->dev,
1046 "%s does not support no-irq mode!\n",
1047 stmpe->variant->name);
1048 ret = -ENODEV;
1049 goto free_gpio;
1050 }
1051 stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
1052 }
1053
Rabin Vincent27e34992010-07-02 16:52:08 +05301054 ret = stmpe_chip_init(stmpe);
1055 if (ret)
Viresh Kumar73de16d2011-11-08 09:44:06 +05301056 goto free_gpio;
Rabin Vincent27e34992010-07-02 16:52:08 +05301057
Chris Blaire31f9b82012-01-26 22:17:03 +01001058 if (stmpe->irq >= 0) {
1059 ret = stmpe_irq_init(stmpe);
1060 if (ret)
1061 goto free_gpio;
Rabin Vincent27e34992010-07-02 16:52:08 +05301062
Chris Blaire31f9b82012-01-26 22:17:03 +01001063 ret = request_threaded_irq(stmpe->irq, NULL, stmpe_irq,
1064 pdata->irq_trigger | IRQF_ONESHOT,
1065 "stmpe", stmpe);
1066 if (ret) {
1067 dev_err(stmpe->dev, "failed to request IRQ: %d\n",
1068 ret);
1069 goto out_removeirq;
1070 }
Rabin Vincent27e34992010-07-02 16:52:08 +05301071 }
1072
1073 ret = stmpe_devices_init(stmpe);
1074 if (ret) {
1075 dev_err(stmpe->dev, "failed to add children\n");
1076 goto out_removedevs;
1077 }
1078
1079 return 0;
1080
1081out_removedevs:
1082 mfd_remove_devices(stmpe->dev);
Chris Blaire31f9b82012-01-26 22:17:03 +01001083 if (stmpe->irq >= 0)
1084 free_irq(stmpe->irq, stmpe);
Rabin Vincent27e34992010-07-02 16:52:08 +05301085out_removeirq:
Chris Blaire31f9b82012-01-26 22:17:03 +01001086 if (stmpe->irq >= 0)
1087 stmpe_irq_remove(stmpe);
Viresh Kumar73de16d2011-11-08 09:44:06 +05301088free_gpio:
1089 if (pdata->irq_over_gpio)
1090 gpio_free(pdata->irq_gpio);
Rabin Vincent27e34992010-07-02 16:52:08 +05301091out_free:
1092 kfree(stmpe);
1093 return ret;
1094}
1095
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301096int stmpe_remove(struct stmpe *stmpe)
Rabin Vincent27e34992010-07-02 16:52:08 +05301097{
Rabin Vincent27e34992010-07-02 16:52:08 +05301098 mfd_remove_devices(stmpe->dev);
1099
Chris Blaire31f9b82012-01-26 22:17:03 +01001100 if (stmpe->irq >= 0) {
1101 free_irq(stmpe->irq, stmpe);
1102 stmpe_irq_remove(stmpe);
1103 }
Rabin Vincent27e34992010-07-02 16:52:08 +05301104
Viresh Kumar73de16d2011-11-08 09:44:06 +05301105 if (stmpe->pdata->irq_over_gpio)
1106 gpio_free(stmpe->pdata->irq_gpio);
1107
Rabin Vincent27e34992010-07-02 16:52:08 +05301108 kfree(stmpe);
1109
1110 return 0;
1111}
1112
Sundar Iyer208c4342010-09-15 10:30:54 +05301113#ifdef CONFIG_PM
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301114static int stmpe_suspend(struct device *dev)
1115{
1116 struct stmpe *stmpe = dev_get_drvdata(dev);
1117
Chris Blaire31f9b82012-01-26 22:17:03 +01001118 if (stmpe->irq >= 0 && device_may_wakeup(dev))
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301119 enable_irq_wake(stmpe->irq);
1120
1121 return 0;
1122}
1123
1124static int stmpe_resume(struct device *dev)
1125{
1126 struct stmpe *stmpe = dev_get_drvdata(dev);
1127
Chris Blaire31f9b82012-01-26 22:17:03 +01001128 if (stmpe->irq >= 0 && device_may_wakeup(dev))
Viresh Kumar1a6e4b72011-11-17 11:02:20 +05301129 disable_irq_wake(stmpe->irq);
1130
1131 return 0;
1132}
1133
1134const struct dev_pm_ops stmpe_dev_pm_ops = {
Sundar Iyer208c4342010-09-15 10:30:54 +05301135 .suspend = stmpe_suspend,
1136 .resume = stmpe_resume,
1137};
1138#endif