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Merge tag 'trace-v5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
[mirror_ubuntu-hirsute-kernel.git] / drivers / gpio / gpio-pca953x.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * PCA953x 4/8/16/24/40 bit I/O ports
4 *
5 * Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
6 * Copyright (C) 2007 Marvell International Ltd.
7 *
8 * Derived from drivers/i2c/chips/pca9539.c
9 */
10
11 #include <linux/acpi.h>
12 #include <linux/bitmap.h>
13 #include <linux/gpio/driver.h>
14 #include <linux/gpio/consumer.h>
15 #include <linux/i2c.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/module.h>
19 #include <linux/of_platform.h>
20 #include <linux/platform_data/pca953x.h>
21 #include <linux/regmap.h>
22 #include <linux/regulator/consumer.h>
23 #include <linux/slab.h>
24
25 #include <asm/unaligned.h>
26
27 #define PCA953X_INPUT 0x00
28 #define PCA953X_OUTPUT 0x01
29 #define PCA953X_INVERT 0x02
30 #define PCA953X_DIRECTION 0x03
31
32 #define REG_ADDR_MASK GENMASK(5, 0)
33 #define REG_ADDR_EXT BIT(6)
34 #define REG_ADDR_AI BIT(7)
35
36 #define PCA957X_IN 0x00
37 #define PCA957X_INVRT 0x01
38 #define PCA957X_BKEN 0x02
39 #define PCA957X_PUPD 0x03
40 #define PCA957X_CFG 0x04
41 #define PCA957X_OUT 0x05
42 #define PCA957X_MSK 0x06
43 #define PCA957X_INTS 0x07
44
45 #define PCAL953X_OUT_STRENGTH 0x20
46 #define PCAL953X_IN_LATCH 0x22
47 #define PCAL953X_PULL_EN 0x23
48 #define PCAL953X_PULL_SEL 0x24
49 #define PCAL953X_INT_MASK 0x25
50 #define PCAL953X_INT_STAT 0x26
51 #define PCAL953X_OUT_CONF 0x27
52
53 #define PCAL6524_INT_EDGE 0x28
54 #define PCAL6524_INT_CLR 0x2a
55 #define PCAL6524_IN_STATUS 0x2b
56 #define PCAL6524_OUT_INDCONF 0x2c
57 #define PCAL6524_DEBOUNCE 0x2d
58
59 #define PCA_GPIO_MASK GENMASK(7, 0)
60
61 #define PCAL_GPIO_MASK GENMASK(4, 0)
62 #define PCAL_PINCTRL_MASK GENMASK(6, 5)
63
64 #define PCA_INT BIT(8)
65 #define PCA_PCAL BIT(9)
66 #define PCA_LATCH_INT (PCA_PCAL | PCA_INT)
67 #define PCA953X_TYPE BIT(12)
68 #define PCA957X_TYPE BIT(13)
69 #define PCA_TYPE_MASK GENMASK(15, 12)
70
71 #define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK)
72
73 static const struct i2c_device_id pca953x_id[] = {
74 { "pca6416", 16 | PCA953X_TYPE | PCA_INT, },
75 { "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
76 { "pca9534", 8 | PCA953X_TYPE | PCA_INT, },
77 { "pca9535", 16 | PCA953X_TYPE | PCA_INT, },
78 { "pca9536", 4 | PCA953X_TYPE, },
79 { "pca9537", 4 | PCA953X_TYPE | PCA_INT, },
80 { "pca9538", 8 | PCA953X_TYPE | PCA_INT, },
81 { "pca9539", 16 | PCA953X_TYPE | PCA_INT, },
82 { "pca9554", 8 | PCA953X_TYPE | PCA_INT, },
83 { "pca9555", 16 | PCA953X_TYPE | PCA_INT, },
84 { "pca9556", 8 | PCA953X_TYPE, },
85 { "pca9557", 8 | PCA953X_TYPE, },
86 { "pca9574", 8 | PCA957X_TYPE | PCA_INT, },
87 { "pca9575", 16 | PCA957X_TYPE | PCA_INT, },
88 { "pca9698", 40 | PCA953X_TYPE, },
89
90 { "pcal6416", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
91 { "pcal6524", 24 | PCA953X_TYPE | PCA_LATCH_INT, },
92 { "pcal9535", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
93 { "pcal9554b", 8 | PCA953X_TYPE | PCA_LATCH_INT, },
94 { "pcal9555a", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
95
96 { "max7310", 8 | PCA953X_TYPE, },
97 { "max7312", 16 | PCA953X_TYPE | PCA_INT, },
98 { "max7313", 16 | PCA953X_TYPE | PCA_INT, },
99 { "max7315", 8 | PCA953X_TYPE | PCA_INT, },
100 { "max7318", 16 | PCA953X_TYPE | PCA_INT, },
101 { "pca6107", 8 | PCA953X_TYPE | PCA_INT, },
102 { "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
103 { "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
104 { "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
105 { "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
106 { "tca9554", 8 | PCA953X_TYPE | PCA_INT, },
107 { "xra1202", 8 | PCA953X_TYPE },
108 { }
109 };
110 MODULE_DEVICE_TABLE(i2c, pca953x_id);
111
112 #ifdef CONFIG_GPIO_PCA953X_IRQ
113
114 #include <linux/dmi.h>
115 #include <linux/gpio.h>
116 #include <linux/list.h>
117
118 static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = {
119 {
120 /*
121 * On Intel Galileo Gen 2 board the IRQ pin of one of
122 * the I²C GPIO expanders, which has GpioInt() resource,
123 * is provided as an absolute number instead of being
124 * relative. Since first controller (gpio-sch.c) and
125 * second (gpio-dwapb.c) are at the fixed bases, we may
126 * safely refer to the number in the global space to get
127 * an IRQ out of it.
128 */
129 .matches = {
130 DMI_EXACT_MATCH(DMI_BOARD_NAME, "GalileoGen2"),
131 },
132 },
133 {}
134 };
135
136 #ifdef CONFIG_ACPI
137 static int pca953x_acpi_get_pin(struct acpi_resource *ares, void *data)
138 {
139 struct acpi_resource_gpio *agpio;
140 int *pin = data;
141
142 if (acpi_gpio_get_irq_resource(ares, &agpio))
143 *pin = agpio->pin_table[0];
144 return 1;
145 }
146
147 static int pca953x_acpi_find_pin(struct device *dev)
148 {
149 struct acpi_device *adev = ACPI_COMPANION(dev);
150 int pin = -ENOENT, ret;
151 LIST_HEAD(r);
152
153 ret = acpi_dev_get_resources(adev, &r, pca953x_acpi_get_pin, &pin);
154 acpi_dev_free_resource_list(&r);
155 if (ret < 0)
156 return ret;
157
158 return pin;
159 }
160 #else
161 static inline int pca953x_acpi_find_pin(struct device *dev) { return -ENXIO; }
162 #endif
163
164 static int pca953x_acpi_get_irq(struct device *dev)
165 {
166 int pin, ret;
167
168 pin = pca953x_acpi_find_pin(dev);
169 if (pin < 0)
170 return pin;
171
172 dev_info(dev, "Applying ACPI interrupt quirk (GPIO %d)\n", pin);
173
174 if (!gpio_is_valid(pin))
175 return -EINVAL;
176
177 ret = gpio_request(pin, "pca953x interrupt");
178 if (ret)
179 return ret;
180
181 ret = gpio_to_irq(pin);
182
183 /* When pin is used as an IRQ, no need to keep it requested */
184 gpio_free(pin);
185
186 return ret;
187 }
188 #endif
189
190 static const struct acpi_device_id pca953x_acpi_ids[] = {
191 { "INT3491", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
192 { }
193 };
194 MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
195
196 #define MAX_BANK 5
197 #define BANK_SZ 8
198 #define MAX_LINE (MAX_BANK * BANK_SZ)
199
200 #define NBANK(chip) DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ)
201
202 struct pca953x_reg_config {
203 int direction;
204 int output;
205 int input;
206 int invert;
207 };
208
209 static const struct pca953x_reg_config pca953x_regs = {
210 .direction = PCA953X_DIRECTION,
211 .output = PCA953X_OUTPUT,
212 .input = PCA953X_INPUT,
213 .invert = PCA953X_INVERT,
214 };
215
216 static const struct pca953x_reg_config pca957x_regs = {
217 .direction = PCA957X_CFG,
218 .output = PCA957X_OUT,
219 .input = PCA957X_IN,
220 .invert = PCA957X_INVRT,
221 };
222
223 struct pca953x_chip {
224 unsigned gpio_start;
225 struct mutex i2c_lock;
226 struct regmap *regmap;
227
228 #ifdef CONFIG_GPIO_PCA953X_IRQ
229 struct mutex irq_lock;
230 DECLARE_BITMAP(irq_mask, MAX_LINE);
231 DECLARE_BITMAP(irq_stat, MAX_LINE);
232 DECLARE_BITMAP(irq_trig_raise, MAX_LINE);
233 DECLARE_BITMAP(irq_trig_fall, MAX_LINE);
234 struct irq_chip irq_chip;
235 #endif
236 atomic_t wakeup_path;
237
238 struct i2c_client *client;
239 struct gpio_chip gpio_chip;
240 const char *const *names;
241 unsigned long driver_data;
242 struct regulator *regulator;
243
244 const struct pca953x_reg_config *regs;
245 };
246
247 static int pca953x_bank_shift(struct pca953x_chip *chip)
248 {
249 return fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
250 }
251
252 #define PCA953x_BANK_INPUT BIT(0)
253 #define PCA953x_BANK_OUTPUT BIT(1)
254 #define PCA953x_BANK_POLARITY BIT(2)
255 #define PCA953x_BANK_CONFIG BIT(3)
256
257 #define PCA957x_BANK_INPUT BIT(0)
258 #define PCA957x_BANK_POLARITY BIT(1)
259 #define PCA957x_BANK_BUSHOLD BIT(2)
260 #define PCA957x_BANK_CONFIG BIT(4)
261 #define PCA957x_BANK_OUTPUT BIT(5)
262
263 #define PCAL9xxx_BANK_IN_LATCH BIT(8 + 2)
264 #define PCAL9xxx_BANK_PULL_EN BIT(8 + 3)
265 #define PCAL9xxx_BANK_PULL_SEL BIT(8 + 4)
266 #define PCAL9xxx_BANK_IRQ_MASK BIT(8 + 5)
267 #define PCAL9xxx_BANK_IRQ_STAT BIT(8 + 6)
268
269 /*
270 * We care about the following registers:
271 * - Standard set, below 0x40, each port can be replicated up to 8 times
272 * - PCA953x standard
273 * Input port 0x00 + 0 * bank_size R
274 * Output port 0x00 + 1 * bank_size RW
275 * Polarity Inversion port 0x00 + 2 * bank_size RW
276 * Configuration port 0x00 + 3 * bank_size RW
277 * - PCA957x with mixed up registers
278 * Input port 0x00 + 0 * bank_size R
279 * Polarity Inversion port 0x00 + 1 * bank_size RW
280 * Bus hold port 0x00 + 2 * bank_size RW
281 * Configuration port 0x00 + 4 * bank_size RW
282 * Output port 0x00 + 5 * bank_size RW
283 *
284 * - Extended set, above 0x40, often chip specific.
285 * - PCAL6524/PCAL9555A with custom PCAL IRQ handling:
286 * Input latch register 0x40 + 2 * bank_size RW
287 * Pull-up/pull-down enable reg 0x40 + 3 * bank_size RW
288 * Pull-up/pull-down select reg 0x40 + 4 * bank_size RW
289 * Interrupt mask register 0x40 + 5 * bank_size RW
290 * Interrupt status register 0x40 + 6 * bank_size R
291 *
292 * - Registers with bit 0x80 set, the AI bit
293 * The bit is cleared and the registers fall into one of the
294 * categories above.
295 */
296
297 static bool pca953x_check_register(struct pca953x_chip *chip, unsigned int reg,
298 u32 checkbank)
299 {
300 int bank_shift = pca953x_bank_shift(chip);
301 int bank = (reg & REG_ADDR_MASK) >> bank_shift;
302 int offset = reg & (BIT(bank_shift) - 1);
303
304 /* Special PCAL extended register check. */
305 if (reg & REG_ADDR_EXT) {
306 if (!(chip->driver_data & PCA_PCAL))
307 return false;
308 bank += 8;
309 }
310
311 /* Register is not in the matching bank. */
312 if (!(BIT(bank) & checkbank))
313 return false;
314
315 /* Register is not within allowed range of bank. */
316 if (offset >= NBANK(chip))
317 return false;
318
319 return true;
320 }
321
322 static bool pca953x_readable_register(struct device *dev, unsigned int reg)
323 {
324 struct pca953x_chip *chip = dev_get_drvdata(dev);
325 u32 bank;
326
327 if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
328 bank = PCA953x_BANK_INPUT | PCA953x_BANK_OUTPUT |
329 PCA953x_BANK_POLARITY | PCA953x_BANK_CONFIG;
330 } else {
331 bank = PCA957x_BANK_INPUT | PCA957x_BANK_OUTPUT |
332 PCA957x_BANK_POLARITY | PCA957x_BANK_CONFIG |
333 PCA957x_BANK_BUSHOLD;
334 }
335
336 if (chip->driver_data & PCA_PCAL) {
337 bank |= PCAL9xxx_BANK_IN_LATCH | PCAL9xxx_BANK_PULL_EN |
338 PCAL9xxx_BANK_PULL_SEL | PCAL9xxx_BANK_IRQ_MASK |
339 PCAL9xxx_BANK_IRQ_STAT;
340 }
341
342 return pca953x_check_register(chip, reg, bank);
343 }
344
345 static bool pca953x_writeable_register(struct device *dev, unsigned int reg)
346 {
347 struct pca953x_chip *chip = dev_get_drvdata(dev);
348 u32 bank;
349
350 if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
351 bank = PCA953x_BANK_OUTPUT | PCA953x_BANK_POLARITY |
352 PCA953x_BANK_CONFIG;
353 } else {
354 bank = PCA957x_BANK_OUTPUT | PCA957x_BANK_POLARITY |
355 PCA957x_BANK_CONFIG | PCA957x_BANK_BUSHOLD;
356 }
357
358 if (chip->driver_data & PCA_PCAL)
359 bank |= PCAL9xxx_BANK_IN_LATCH | PCAL9xxx_BANK_PULL_EN |
360 PCAL9xxx_BANK_PULL_SEL | PCAL9xxx_BANK_IRQ_MASK;
361
362 return pca953x_check_register(chip, reg, bank);
363 }
364
365 static bool pca953x_volatile_register(struct device *dev, unsigned int reg)
366 {
367 struct pca953x_chip *chip = dev_get_drvdata(dev);
368 u32 bank;
369
370 if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
371 bank = PCA953x_BANK_INPUT;
372 else
373 bank = PCA957x_BANK_INPUT;
374
375 if (chip->driver_data & PCA_PCAL)
376 bank |= PCAL9xxx_BANK_IRQ_STAT;
377
378 return pca953x_check_register(chip, reg, bank);
379 }
380
381 static const struct regmap_config pca953x_i2c_regmap = {
382 .reg_bits = 8,
383 .val_bits = 8,
384
385 .readable_reg = pca953x_readable_register,
386 .writeable_reg = pca953x_writeable_register,
387 .volatile_reg = pca953x_volatile_register,
388
389 .disable_locking = true,
390 .cache_type = REGCACHE_RBTREE,
391 .max_register = 0x7f,
392 };
393
394 static const struct regmap_config pca953x_ai_i2c_regmap = {
395 .reg_bits = 8,
396 .val_bits = 8,
397
398 .read_flag_mask = REG_ADDR_AI,
399 .write_flag_mask = REG_ADDR_AI,
400
401 .readable_reg = pca953x_readable_register,
402 .writeable_reg = pca953x_writeable_register,
403 .volatile_reg = pca953x_volatile_register,
404
405 .disable_locking = true,
406 .cache_type = REGCACHE_RBTREE,
407 .max_register = 0x7f,
408 };
409
410 static u8 pca953x_recalc_addr(struct pca953x_chip *chip, int reg, int off)
411 {
412 int bank_shift = pca953x_bank_shift(chip);
413 int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
414 int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
415 u8 regaddr = pinctrl | addr | (off / BANK_SZ);
416
417 return regaddr;
418 }
419
420 static int pca953x_write_regs(struct pca953x_chip *chip, int reg, unsigned long *val)
421 {
422 u8 regaddr = pca953x_recalc_addr(chip, reg, 0);
423 u8 value[MAX_BANK];
424 int i, ret;
425
426 for (i = 0; i < NBANK(chip); i++)
427 value[i] = bitmap_get_value8(val, i * BANK_SZ);
428
429 ret = regmap_bulk_write(chip->regmap, regaddr, value, NBANK(chip));
430 if (ret < 0) {
431 dev_err(&chip->client->dev, "failed writing register\n");
432 return ret;
433 }
434
435 return 0;
436 }
437
438 static int pca953x_read_regs(struct pca953x_chip *chip, int reg, unsigned long *val)
439 {
440 u8 regaddr = pca953x_recalc_addr(chip, reg, 0);
441 u8 value[MAX_BANK];
442 int i, ret;
443
444 ret = regmap_bulk_read(chip->regmap, regaddr, value, NBANK(chip));
445 if (ret < 0) {
446 dev_err(&chip->client->dev, "failed reading register\n");
447 return ret;
448 }
449
450 for (i = 0; i < NBANK(chip); i++)
451 bitmap_set_value8(val, value[i], i * BANK_SZ);
452
453 return 0;
454 }
455
456 static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
457 {
458 struct pca953x_chip *chip = gpiochip_get_data(gc);
459 u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
460 u8 bit = BIT(off % BANK_SZ);
461 int ret;
462
463 mutex_lock(&chip->i2c_lock);
464 ret = regmap_write_bits(chip->regmap, dirreg, bit, bit);
465 mutex_unlock(&chip->i2c_lock);
466 return ret;
467 }
468
469 static int pca953x_gpio_direction_output(struct gpio_chip *gc,
470 unsigned off, int val)
471 {
472 struct pca953x_chip *chip = gpiochip_get_data(gc);
473 u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
474 u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off);
475 u8 bit = BIT(off % BANK_SZ);
476 int ret;
477
478 mutex_lock(&chip->i2c_lock);
479 /* set output level */
480 ret = regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
481 if (ret)
482 goto exit;
483
484 /* then direction */
485 ret = regmap_write_bits(chip->regmap, dirreg, bit, 0);
486 exit:
487 mutex_unlock(&chip->i2c_lock);
488 return ret;
489 }
490
491 static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
492 {
493 struct pca953x_chip *chip = gpiochip_get_data(gc);
494 u8 inreg = pca953x_recalc_addr(chip, chip->regs->input, off);
495 u8 bit = BIT(off % BANK_SZ);
496 u32 reg_val;
497 int ret;
498
499 mutex_lock(&chip->i2c_lock);
500 ret = regmap_read(chip->regmap, inreg, &reg_val);
501 mutex_unlock(&chip->i2c_lock);
502 if (ret < 0) {
503 /*
504 * NOTE:
505 * diagnostic already emitted; that's all we should
506 * do unless gpio_*_value_cansleep() calls become different
507 * from their nonsleeping siblings (and report faults).
508 */
509 return 0;
510 }
511
512 return !!(reg_val & bit);
513 }
514
515 static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
516 {
517 struct pca953x_chip *chip = gpiochip_get_data(gc);
518 u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off);
519 u8 bit = BIT(off % BANK_SZ);
520
521 mutex_lock(&chip->i2c_lock);
522 regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
523 mutex_unlock(&chip->i2c_lock);
524 }
525
526 static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
527 {
528 struct pca953x_chip *chip = gpiochip_get_data(gc);
529 u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
530 u8 bit = BIT(off % BANK_SZ);
531 u32 reg_val;
532 int ret;
533
534 mutex_lock(&chip->i2c_lock);
535 ret = regmap_read(chip->regmap, dirreg, &reg_val);
536 mutex_unlock(&chip->i2c_lock);
537 if (ret < 0)
538 return ret;
539
540 if (reg_val & bit)
541 return GPIO_LINE_DIRECTION_IN;
542
543 return GPIO_LINE_DIRECTION_OUT;
544 }
545
546 static int pca953x_gpio_get_multiple(struct gpio_chip *gc,
547 unsigned long *mask, unsigned long *bits)
548 {
549 struct pca953x_chip *chip = gpiochip_get_data(gc);
550 DECLARE_BITMAP(reg_val, MAX_LINE);
551 int ret;
552
553 mutex_lock(&chip->i2c_lock);
554 ret = pca953x_read_regs(chip, chip->regs->input, reg_val);
555 mutex_unlock(&chip->i2c_lock);
556 if (ret)
557 return ret;
558
559 bitmap_replace(bits, bits, reg_val, mask, gc->ngpio);
560 return 0;
561 }
562
563 static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
564 unsigned long *mask, unsigned long *bits)
565 {
566 struct pca953x_chip *chip = gpiochip_get_data(gc);
567 DECLARE_BITMAP(reg_val, MAX_LINE);
568 int ret;
569
570 mutex_lock(&chip->i2c_lock);
571 ret = pca953x_read_regs(chip, chip->regs->output, reg_val);
572 if (ret)
573 goto exit;
574
575 bitmap_replace(reg_val, reg_val, bits, mask, gc->ngpio);
576
577 pca953x_write_regs(chip, chip->regs->output, reg_val);
578 exit:
579 mutex_unlock(&chip->i2c_lock);
580 }
581
582 static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
583 unsigned int offset,
584 unsigned long config)
585 {
586 u8 pull_en_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_EN, offset);
587 u8 pull_sel_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_SEL, offset);
588 u8 bit = BIT(offset % BANK_SZ);
589 int ret;
590
591 /*
592 * pull-up/pull-down configuration requires PCAL extended
593 * registers
594 */
595 if (!(chip->driver_data & PCA_PCAL))
596 return -ENOTSUPP;
597
598 mutex_lock(&chip->i2c_lock);
599
600 /* Disable pull-up/pull-down */
601 ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, 0);
602 if (ret)
603 goto exit;
604
605 /* Configure pull-up/pull-down */
606 if (config == PIN_CONFIG_BIAS_PULL_UP)
607 ret = regmap_write_bits(chip->regmap, pull_sel_reg, bit, bit);
608 else if (config == PIN_CONFIG_BIAS_PULL_DOWN)
609 ret = regmap_write_bits(chip->regmap, pull_sel_reg, bit, 0);
610 if (ret)
611 goto exit;
612
613 /* Enable pull-up/pull-down */
614 ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, bit);
615
616 exit:
617 mutex_unlock(&chip->i2c_lock);
618 return ret;
619 }
620
621 static int pca953x_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
622 unsigned long config)
623 {
624 struct pca953x_chip *chip = gpiochip_get_data(gc);
625
626 switch (pinconf_to_config_param(config)) {
627 case PIN_CONFIG_BIAS_PULL_UP:
628 case PIN_CONFIG_BIAS_PULL_DOWN:
629 return pca953x_gpio_set_pull_up_down(chip, offset, config);
630 default:
631 return -ENOTSUPP;
632 }
633 }
634
635 static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
636 {
637 struct gpio_chip *gc;
638
639 gc = &chip->gpio_chip;
640
641 gc->direction_input = pca953x_gpio_direction_input;
642 gc->direction_output = pca953x_gpio_direction_output;
643 gc->get = pca953x_gpio_get_value;
644 gc->set = pca953x_gpio_set_value;
645 gc->get_direction = pca953x_gpio_get_direction;
646 gc->get_multiple = pca953x_gpio_get_multiple;
647 gc->set_multiple = pca953x_gpio_set_multiple;
648 gc->set_config = pca953x_gpio_set_config;
649 gc->can_sleep = true;
650
651 gc->base = chip->gpio_start;
652 gc->ngpio = gpios;
653 gc->label = dev_name(&chip->client->dev);
654 gc->parent = &chip->client->dev;
655 gc->owner = THIS_MODULE;
656 gc->names = chip->names;
657 }
658
659 #ifdef CONFIG_GPIO_PCA953X_IRQ
660 static void pca953x_irq_mask(struct irq_data *d)
661 {
662 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
663 struct pca953x_chip *chip = gpiochip_get_data(gc);
664 irq_hw_number_t hwirq = irqd_to_hwirq(d);
665
666 clear_bit(hwirq, chip->irq_mask);
667 }
668
669 static void pca953x_irq_unmask(struct irq_data *d)
670 {
671 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
672 struct pca953x_chip *chip = gpiochip_get_data(gc);
673 irq_hw_number_t hwirq = irqd_to_hwirq(d);
674
675 set_bit(hwirq, chip->irq_mask);
676 }
677
678 static int pca953x_irq_set_wake(struct irq_data *d, unsigned int on)
679 {
680 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
681 struct pca953x_chip *chip = gpiochip_get_data(gc);
682
683 if (on)
684 atomic_inc(&chip->wakeup_path);
685 else
686 atomic_dec(&chip->wakeup_path);
687
688 return irq_set_irq_wake(chip->client->irq, on);
689 }
690
691 static void pca953x_irq_bus_lock(struct irq_data *d)
692 {
693 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
694 struct pca953x_chip *chip = gpiochip_get_data(gc);
695
696 mutex_lock(&chip->irq_lock);
697 }
698
699 static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
700 {
701 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
702 struct pca953x_chip *chip = gpiochip_get_data(gc);
703 DECLARE_BITMAP(irq_mask, MAX_LINE);
704 DECLARE_BITMAP(reg_direction, MAX_LINE);
705 int level;
706
707 if (chip->driver_data & PCA_PCAL) {
708 /* Enable latch on interrupt-enabled inputs */
709 pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask);
710
711 bitmap_complement(irq_mask, chip->irq_mask, gc->ngpio);
712
713 /* Unmask enabled interrupts */
714 pca953x_write_regs(chip, PCAL953X_INT_MASK, irq_mask);
715 }
716
717 /* Switch direction to input if needed */
718 pca953x_read_regs(chip, chip->regs->direction, reg_direction);
719
720 bitmap_or(irq_mask, chip->irq_trig_fall, chip->irq_trig_raise, gc->ngpio);
721 bitmap_complement(reg_direction, reg_direction, gc->ngpio);
722 bitmap_and(irq_mask, irq_mask, reg_direction, gc->ngpio);
723
724 /* Look for any newly setup interrupt */
725 for_each_set_bit(level, irq_mask, gc->ngpio)
726 pca953x_gpio_direction_input(&chip->gpio_chip, level);
727
728 mutex_unlock(&chip->irq_lock);
729 }
730
731 static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
732 {
733 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
734 struct pca953x_chip *chip = gpiochip_get_data(gc);
735 irq_hw_number_t hwirq = irqd_to_hwirq(d);
736
737 if (!(type & IRQ_TYPE_EDGE_BOTH)) {
738 dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
739 d->irq, type);
740 return -EINVAL;
741 }
742
743 assign_bit(hwirq, chip->irq_trig_fall, type & IRQ_TYPE_EDGE_FALLING);
744 assign_bit(hwirq, chip->irq_trig_raise, type & IRQ_TYPE_EDGE_RISING);
745
746 return 0;
747 }
748
749 static void pca953x_irq_shutdown(struct irq_data *d)
750 {
751 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
752 struct pca953x_chip *chip = gpiochip_get_data(gc);
753 irq_hw_number_t hwirq = irqd_to_hwirq(d);
754
755 clear_bit(hwirq, chip->irq_trig_raise);
756 clear_bit(hwirq, chip->irq_trig_fall);
757 }
758
759 static bool pca953x_irq_pending(struct pca953x_chip *chip, unsigned long *pending)
760 {
761 struct gpio_chip *gc = &chip->gpio_chip;
762 DECLARE_BITMAP(reg_direction, MAX_LINE);
763 DECLARE_BITMAP(old_stat, MAX_LINE);
764 DECLARE_BITMAP(cur_stat, MAX_LINE);
765 DECLARE_BITMAP(new_stat, MAX_LINE);
766 DECLARE_BITMAP(trigger, MAX_LINE);
767 int ret;
768
769 if (chip->driver_data & PCA_PCAL) {
770 /* Read the current interrupt status from the device */
771 ret = pca953x_read_regs(chip, PCAL953X_INT_STAT, trigger);
772 if (ret)
773 return false;
774
775 /* Check latched inputs and clear interrupt status */
776 ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
777 if (ret)
778 return false;
779
780 /* Apply filter for rising/falling edge selection */
781 bitmap_replace(new_stat, chip->irq_trig_fall, chip->irq_trig_raise, cur_stat, gc->ngpio);
782
783 bitmap_and(pending, new_stat, trigger, gc->ngpio);
784
785 return !bitmap_empty(pending, gc->ngpio);
786 }
787
788 ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
789 if (ret)
790 return false;
791
792 /* Remove output pins from the equation */
793 pca953x_read_regs(chip, chip->regs->direction, reg_direction);
794
795 bitmap_copy(old_stat, chip->irq_stat, gc->ngpio);
796
797 bitmap_and(new_stat, cur_stat, reg_direction, gc->ngpio);
798 bitmap_xor(cur_stat, new_stat, old_stat, gc->ngpio);
799 bitmap_and(trigger, cur_stat, chip->irq_mask, gc->ngpio);
800
801 if (bitmap_empty(trigger, gc->ngpio))
802 return false;
803
804 bitmap_copy(chip->irq_stat, new_stat, gc->ngpio);
805
806 bitmap_and(cur_stat, chip->irq_trig_fall, old_stat, gc->ngpio);
807 bitmap_and(old_stat, chip->irq_trig_raise, new_stat, gc->ngpio);
808 bitmap_or(new_stat, old_stat, cur_stat, gc->ngpio);
809 bitmap_and(pending, new_stat, trigger, gc->ngpio);
810
811 return !bitmap_empty(pending, gc->ngpio);
812 }
813
814 static irqreturn_t pca953x_irq_handler(int irq, void *devid)
815 {
816 struct pca953x_chip *chip = devid;
817 struct gpio_chip *gc = &chip->gpio_chip;
818 DECLARE_BITMAP(pending, MAX_LINE);
819 int level;
820 bool ret;
821
822 bitmap_zero(pending, MAX_LINE);
823
824 mutex_lock(&chip->i2c_lock);
825 ret = pca953x_irq_pending(chip, pending);
826 mutex_unlock(&chip->i2c_lock);
827
828 if (ret) {
829 ret = 0;
830
831 for_each_set_bit(level, pending, gc->ngpio) {
832 int nested_irq = irq_find_mapping(gc->irq.domain, level);
833
834 if (unlikely(nested_irq <= 0)) {
835 dev_warn_ratelimited(gc->parent, "unmapped interrupt %d\n", level);
836 continue;
837 }
838
839 handle_nested_irq(nested_irq);
840 ret = 1;
841 }
842 }
843
844 return IRQ_RETVAL(ret);
845 }
846
847 static int pca953x_irq_setup(struct pca953x_chip *chip, int irq_base)
848 {
849 struct i2c_client *client = chip->client;
850 struct irq_chip *irq_chip = &chip->irq_chip;
851 DECLARE_BITMAP(reg_direction, MAX_LINE);
852 DECLARE_BITMAP(irq_stat, MAX_LINE);
853 struct gpio_irq_chip *girq;
854 int ret;
855
856 if (dmi_first_match(pca953x_dmi_acpi_irq_info)) {
857 ret = pca953x_acpi_get_irq(&client->dev);
858 if (ret > 0)
859 client->irq = ret;
860 }
861
862 if (!client->irq)
863 return 0;
864
865 if (irq_base == -1)
866 return 0;
867
868 if (!(chip->driver_data & PCA_INT))
869 return 0;
870
871 ret = pca953x_read_regs(chip, chip->regs->input, irq_stat);
872 if (ret)
873 return ret;
874
875 /*
876 * There is no way to know which GPIO line generated the
877 * interrupt. We have to rely on the previous read for
878 * this purpose.
879 */
880 pca953x_read_regs(chip, chip->regs->direction, reg_direction);
881 bitmap_and(chip->irq_stat, irq_stat, reg_direction, chip->gpio_chip.ngpio);
882 mutex_init(&chip->irq_lock);
883
884 irq_chip->name = dev_name(&client->dev);
885 irq_chip->irq_mask = pca953x_irq_mask;
886 irq_chip->irq_unmask = pca953x_irq_unmask;
887 irq_chip->irq_set_wake = pca953x_irq_set_wake;
888 irq_chip->irq_bus_lock = pca953x_irq_bus_lock;
889 irq_chip->irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock;
890 irq_chip->irq_set_type = pca953x_irq_set_type;
891 irq_chip->irq_shutdown = pca953x_irq_shutdown;
892
893 girq = &chip->gpio_chip.irq;
894 girq->chip = irq_chip;
895 /* This will let us handle the parent IRQ in the driver */
896 girq->parent_handler = NULL;
897 girq->num_parents = 0;
898 girq->parents = NULL;
899 girq->default_type = IRQ_TYPE_NONE;
900 girq->handler = handle_simple_irq;
901 girq->threaded = true;
902 girq->first = irq_base; /* FIXME: get rid of this */
903
904 ret = devm_request_threaded_irq(&client->dev, client->irq,
905 NULL, pca953x_irq_handler,
906 IRQF_ONESHOT | IRQF_SHARED,
907 dev_name(&client->dev), chip);
908 if (ret) {
909 dev_err(&client->dev, "failed to request irq %d\n",
910 client->irq);
911 return ret;
912 }
913
914 return 0;
915 }
916
917 #else /* CONFIG_GPIO_PCA953X_IRQ */
918 static int pca953x_irq_setup(struct pca953x_chip *chip,
919 int irq_base)
920 {
921 struct i2c_client *client = chip->client;
922
923 if (client->irq && irq_base != -1 && (chip->driver_data & PCA_INT))
924 dev_warn(&client->dev, "interrupt support not compiled in\n");
925
926 return 0;
927 }
928 #endif
929
930 static int device_pca95xx_init(struct pca953x_chip *chip, u32 invert)
931 {
932 DECLARE_BITMAP(val, MAX_LINE);
933 int ret;
934
935 ret = regcache_sync_region(chip->regmap, chip->regs->output,
936 chip->regs->output + NBANK(chip));
937 if (ret)
938 goto out;
939
940 ret = regcache_sync_region(chip->regmap, chip->regs->direction,
941 chip->regs->direction + NBANK(chip));
942 if (ret)
943 goto out;
944
945 /* set platform specific polarity inversion */
946 if (invert)
947 bitmap_fill(val, MAX_LINE);
948 else
949 bitmap_zero(val, MAX_LINE);
950
951 ret = pca953x_write_regs(chip, chip->regs->invert, val);
952 out:
953 return ret;
954 }
955
956 static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
957 {
958 DECLARE_BITMAP(val, MAX_LINE);
959 unsigned int i;
960 int ret;
961
962 ret = device_pca95xx_init(chip, invert);
963 if (ret)
964 goto out;
965
966 /* To enable register 6, 7 to control pull up and pull down */
967 for (i = 0; i < NBANK(chip); i++)
968 bitmap_set_value8(val, 0x02, i * BANK_SZ);
969
970 ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
971 if (ret)
972 goto out;
973
974 return 0;
975 out:
976 return ret;
977 }
978
979 static int pca953x_probe(struct i2c_client *client,
980 const struct i2c_device_id *i2c_id)
981 {
982 struct pca953x_platform_data *pdata;
983 struct pca953x_chip *chip;
984 int irq_base = 0;
985 int ret;
986 u32 invert = 0;
987 struct regulator *reg;
988 const struct regmap_config *regmap_config;
989
990 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
991 if (chip == NULL)
992 return -ENOMEM;
993
994 pdata = dev_get_platdata(&client->dev);
995 if (pdata) {
996 irq_base = pdata->irq_base;
997 chip->gpio_start = pdata->gpio_base;
998 invert = pdata->invert;
999 chip->names = pdata->names;
1000 } else {
1001 struct gpio_desc *reset_gpio;
1002
1003 chip->gpio_start = -1;
1004 irq_base = 0;
1005
1006 /*
1007 * See if we need to de-assert a reset pin.
1008 *
1009 * There is no known ACPI-enabled platforms that are
1010 * using "reset" GPIO. Otherwise any of those platform
1011 * must use _DSD method with corresponding property.
1012 */
1013 reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
1014 GPIOD_OUT_LOW);
1015 if (IS_ERR(reset_gpio))
1016 return PTR_ERR(reset_gpio);
1017 }
1018
1019 chip->client = client;
1020
1021 reg = devm_regulator_get(&client->dev, "vcc");
1022 if (IS_ERR(reg))
1023 return dev_err_probe(&client->dev, PTR_ERR(reg), "reg get err\n");
1024
1025 ret = regulator_enable(reg);
1026 if (ret) {
1027 dev_err(&client->dev, "reg en err: %d\n", ret);
1028 return ret;
1029 }
1030 chip->regulator = reg;
1031
1032 if (i2c_id) {
1033 chip->driver_data = i2c_id->driver_data;
1034 } else {
1035 const void *match;
1036
1037 match = device_get_match_data(&client->dev);
1038 if (!match) {
1039 ret = -ENODEV;
1040 goto err_exit;
1041 }
1042
1043 chip->driver_data = (uintptr_t)match;
1044 }
1045
1046 i2c_set_clientdata(client, chip);
1047
1048 pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
1049
1050 if (NBANK(chip) > 2 || PCA_CHIP_TYPE(chip->driver_data) == PCA957X_TYPE) {
1051 dev_info(&client->dev, "using AI\n");
1052 regmap_config = &pca953x_ai_i2c_regmap;
1053 } else {
1054 dev_info(&client->dev, "using no AI\n");
1055 regmap_config = &pca953x_i2c_regmap;
1056 }
1057
1058 chip->regmap = devm_regmap_init_i2c(client, regmap_config);
1059 if (IS_ERR(chip->regmap)) {
1060 ret = PTR_ERR(chip->regmap);
1061 goto err_exit;
1062 }
1063
1064 regcache_mark_dirty(chip->regmap);
1065
1066 mutex_init(&chip->i2c_lock);
1067 /*
1068 * In case we have an i2c-mux controlled by a GPIO provided by an
1069 * expander using the same driver higher on the device tree, read the
1070 * i2c adapter nesting depth and use the retrieved value as lockdep
1071 * subclass for chip->i2c_lock.
1072 *
1073 * REVISIT: This solution is not complete. It protects us from lockdep
1074 * false positives when the expander controlling the i2c-mux is on
1075 * a different level on the device tree, but not when it's on the same
1076 * level on a different branch (in which case the subclass number
1077 * would be the same).
1078 *
1079 * TODO: Once a correct solution is developed, a similar fix should be
1080 * applied to all other i2c-controlled GPIO expanders (and potentially
1081 * regmap-i2c).
1082 */
1083 lockdep_set_subclass(&chip->i2c_lock,
1084 i2c_adapter_depth(client->adapter));
1085
1086 /* initialize cached registers from their original values.
1087 * we can't share this chip with another i2c master.
1088 */
1089
1090 if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
1091 chip->regs = &pca953x_regs;
1092 ret = device_pca95xx_init(chip, invert);
1093 } else {
1094 chip->regs = &pca957x_regs;
1095 ret = device_pca957x_init(chip, invert);
1096 }
1097 if (ret)
1098 goto err_exit;
1099
1100 ret = pca953x_irq_setup(chip, irq_base);
1101 if (ret)
1102 goto err_exit;
1103
1104 ret = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip);
1105 if (ret)
1106 goto err_exit;
1107
1108 if (pdata && pdata->setup) {
1109 ret = pdata->setup(client, chip->gpio_chip.base,
1110 chip->gpio_chip.ngpio, pdata->context);
1111 if (ret < 0)
1112 dev_warn(&client->dev, "setup failed, %d\n", ret);
1113 }
1114
1115 return 0;
1116
1117 err_exit:
1118 regulator_disable(chip->regulator);
1119 return ret;
1120 }
1121
1122 static int pca953x_remove(struct i2c_client *client)
1123 {
1124 struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev);
1125 struct pca953x_chip *chip = i2c_get_clientdata(client);
1126 int ret;
1127
1128 if (pdata && pdata->teardown) {
1129 ret = pdata->teardown(client, chip->gpio_chip.base,
1130 chip->gpio_chip.ngpio, pdata->context);
1131 if (ret < 0)
1132 dev_err(&client->dev, "teardown failed, %d\n", ret);
1133 } else {
1134 ret = 0;
1135 }
1136
1137 regulator_disable(chip->regulator);
1138
1139 return ret;
1140 }
1141
1142 #ifdef CONFIG_PM_SLEEP
1143 static int pca953x_regcache_sync(struct device *dev)
1144 {
1145 struct pca953x_chip *chip = dev_get_drvdata(dev);
1146 int ret;
1147
1148 /*
1149 * The ordering between direction and output is important,
1150 * sync these registers first and only then sync the rest.
1151 */
1152 ret = regcache_sync_region(chip->regmap, chip->regs->direction,
1153 chip->regs->direction + NBANK(chip));
1154 if (ret) {
1155 dev_err(dev, "Failed to sync GPIO dir registers: %d\n", ret);
1156 return ret;
1157 }
1158
1159 ret = regcache_sync_region(chip->regmap, chip->regs->output,
1160 chip->regs->output + NBANK(chip));
1161 if (ret) {
1162 dev_err(dev, "Failed to sync GPIO out registers: %d\n", ret);
1163 return ret;
1164 }
1165
1166 #ifdef CONFIG_GPIO_PCA953X_IRQ
1167 if (chip->driver_data & PCA_PCAL) {
1168 ret = regcache_sync_region(chip->regmap, PCAL953X_IN_LATCH,
1169 PCAL953X_IN_LATCH + NBANK(chip));
1170 if (ret) {
1171 dev_err(dev, "Failed to sync INT latch registers: %d\n",
1172 ret);
1173 return ret;
1174 }
1175
1176 ret = regcache_sync_region(chip->regmap, PCAL953X_INT_MASK,
1177 PCAL953X_INT_MASK + NBANK(chip));
1178 if (ret) {
1179 dev_err(dev, "Failed to sync INT mask registers: %d\n",
1180 ret);
1181 return ret;
1182 }
1183 }
1184 #endif
1185
1186 return 0;
1187 }
1188
1189 static int pca953x_suspend(struct device *dev)
1190 {
1191 struct pca953x_chip *chip = dev_get_drvdata(dev);
1192
1193 regcache_cache_only(chip->regmap, true);
1194
1195 if (atomic_read(&chip->wakeup_path))
1196 device_set_wakeup_path(dev);
1197 else
1198 regulator_disable(chip->regulator);
1199
1200 return 0;
1201 }
1202
1203 static int pca953x_resume(struct device *dev)
1204 {
1205 struct pca953x_chip *chip = dev_get_drvdata(dev);
1206 int ret;
1207
1208 if (!atomic_read(&chip->wakeup_path)) {
1209 ret = regulator_enable(chip->regulator);
1210 if (ret) {
1211 dev_err(dev, "Failed to enable regulator: %d\n", ret);
1212 return 0;
1213 }
1214 }
1215
1216 regcache_cache_only(chip->regmap, false);
1217 regcache_mark_dirty(chip->regmap);
1218 ret = pca953x_regcache_sync(dev);
1219 if (ret)
1220 return ret;
1221
1222 ret = regcache_sync(chip->regmap);
1223 if (ret) {
1224 dev_err(dev, "Failed to restore register map: %d\n", ret);
1225 return ret;
1226 }
1227
1228 return 0;
1229 }
1230 #endif
1231
1232 /* convenience to stop overlong match-table lines */
1233 #define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int)
1234 #define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int)
1235
1236 static const struct of_device_id pca953x_dt_ids[] = {
1237 { .compatible = "nxp,pca6416", .data = OF_953X(16, PCA_INT), },
1238 { .compatible = "nxp,pca9505", .data = OF_953X(40, PCA_INT), },
1239 { .compatible = "nxp,pca9534", .data = OF_953X( 8, PCA_INT), },
1240 { .compatible = "nxp,pca9535", .data = OF_953X(16, PCA_INT), },
1241 { .compatible = "nxp,pca9536", .data = OF_953X( 4, 0), },
1242 { .compatible = "nxp,pca9537", .data = OF_953X( 4, PCA_INT), },
1243 { .compatible = "nxp,pca9538", .data = OF_953X( 8, PCA_INT), },
1244 { .compatible = "nxp,pca9539", .data = OF_953X(16, PCA_INT), },
1245 { .compatible = "nxp,pca9554", .data = OF_953X( 8, PCA_INT), },
1246 { .compatible = "nxp,pca9555", .data = OF_953X(16, PCA_INT), },
1247 { .compatible = "nxp,pca9556", .data = OF_953X( 8, 0), },
1248 { .compatible = "nxp,pca9557", .data = OF_953X( 8, 0), },
1249 { .compatible = "nxp,pca9574", .data = OF_957X( 8, PCA_INT), },
1250 { .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), },
1251 { .compatible = "nxp,pca9698", .data = OF_953X(40, 0), },
1252
1253 { .compatible = "nxp,pcal6416", .data = OF_953X(16, PCA_LATCH_INT), },
1254 { .compatible = "nxp,pcal6524", .data = OF_953X(24, PCA_LATCH_INT), },
1255 { .compatible = "nxp,pcal9535", .data = OF_953X(16, PCA_LATCH_INT), },
1256 { .compatible = "nxp,pcal9554b", .data = OF_953X( 8, PCA_LATCH_INT), },
1257 { .compatible = "nxp,pcal9555a", .data = OF_953X(16, PCA_LATCH_INT), },
1258
1259 { .compatible = "maxim,max7310", .data = OF_953X( 8, 0), },
1260 { .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), },
1261 { .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), },
1262 { .compatible = "maxim,max7315", .data = OF_953X( 8, PCA_INT), },
1263 { .compatible = "maxim,max7318", .data = OF_953X(16, PCA_INT), },
1264
1265 { .compatible = "ti,pca6107", .data = OF_953X( 8, PCA_INT), },
1266 { .compatible = "ti,pca9536", .data = OF_953X( 4, 0), },
1267 { .compatible = "ti,tca6408", .data = OF_953X( 8, PCA_INT), },
1268 { .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), },
1269 { .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), },
1270 { .compatible = "ti,tca9539", .data = OF_953X(16, PCA_INT), },
1271
1272 { .compatible = "onnn,cat9554", .data = OF_953X( 8, PCA_INT), },
1273 { .compatible = "onnn,pca9654", .data = OF_953X( 8, PCA_INT), },
1274
1275 { .compatible = "exar,xra1202", .data = OF_953X( 8, 0), },
1276 { }
1277 };
1278
1279 MODULE_DEVICE_TABLE(of, pca953x_dt_ids);
1280
1281 static SIMPLE_DEV_PM_OPS(pca953x_pm_ops, pca953x_suspend, pca953x_resume);
1282
1283 static struct i2c_driver pca953x_driver = {
1284 .driver = {
1285 .name = "pca953x",
1286 .pm = &pca953x_pm_ops,
1287 .of_match_table = pca953x_dt_ids,
1288 .acpi_match_table = pca953x_acpi_ids,
1289 },
1290 .probe = pca953x_probe,
1291 .remove = pca953x_remove,
1292 .id_table = pca953x_id,
1293 };
1294
1295 static int __init pca953x_init(void)
1296 {
1297 return i2c_add_driver(&pca953x_driver);
1298 }
1299 /* register after i2c postcore initcall and before
1300 * subsys initcalls that may rely on these GPIOs
1301 */
1302 subsys_initcall(pca953x_init);
1303
1304 static void __exit pca953x_exit(void)
1305 {
1306 i2c_del_driver(&pca953x_driver);
1307 }
1308 module_exit(pca953x_exit);
1309
1310 MODULE_AUTHOR("eric miao <eric.miao@marvell.com>");
1311 MODULE_DESCRIPTION("GPIO expander driver for PCA953x");
1312 MODULE_LICENSE("GPL");
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