GNU Linux-libre 5.10.215-gnu1
[releases.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
116 static const struct acpi_gpio_params pca953x_irq_gpios = { 0, 0, true };
117
118 static const struct acpi_gpio_mapping pca953x_acpi_irq_gpios[] = {
119         { "irq-gpios", &pca953x_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER },
120         { }
121 };
122
123 static int pca953x_acpi_get_irq(struct device *dev)
124 {
125         int ret;
126
127         ret = devm_acpi_dev_add_driver_gpios(dev, pca953x_acpi_irq_gpios);
128         if (ret)
129                 dev_warn(dev, "can't add GPIO ACPI mapping\n");
130
131         ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0);
132         if (ret < 0)
133                 return ret;
134
135         dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret);
136         return ret;
137 }
138
139 static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = {
140         {
141                 /*
142                  * On Intel Galileo Gen 2 board the IRQ pin of one of
143                  * the I²C GPIO expanders, which has GpioInt() resource,
144                  * is provided as an absolute number instead of being
145                  * relative. Since first controller (gpio-sch.c) and
146                  * second (gpio-dwapb.c) are at the fixed bases, we may
147                  * safely refer to the number in the global space to get
148                  * an IRQ out of it.
149                  */
150                 .matches = {
151                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "GalileoGen2"),
152                 },
153         },
154         {}
155 };
156 #endif
157
158 static const struct acpi_device_id pca953x_acpi_ids[] = {
159         { "INT3491", 16 | PCA953X_TYPE | PCA_LATCH_INT, },
160         { }
161 };
162 MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
163
164 #define MAX_BANK 5
165 #define BANK_SZ 8
166 #define MAX_LINE        (MAX_BANK * BANK_SZ)
167
168 #define NBANK(chip) DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ)
169
170 struct pca953x_reg_config {
171         int direction;
172         int output;
173         int input;
174         int invert;
175 };
176
177 static const struct pca953x_reg_config pca953x_regs = {
178         .direction = PCA953X_DIRECTION,
179         .output = PCA953X_OUTPUT,
180         .input = PCA953X_INPUT,
181         .invert = PCA953X_INVERT,
182 };
183
184 static const struct pca953x_reg_config pca957x_regs = {
185         .direction = PCA957X_CFG,
186         .output = PCA957X_OUT,
187         .input = PCA957X_IN,
188         .invert = PCA957X_INVRT,
189 };
190
191 struct pca953x_chip {
192         unsigned gpio_start;
193         struct mutex i2c_lock;
194         struct regmap *regmap;
195
196 #ifdef CONFIG_GPIO_PCA953X_IRQ
197         struct mutex irq_lock;
198         DECLARE_BITMAP(irq_mask, MAX_LINE);
199         DECLARE_BITMAP(irq_stat, MAX_LINE);
200         DECLARE_BITMAP(irq_trig_raise, MAX_LINE);
201         DECLARE_BITMAP(irq_trig_fall, MAX_LINE);
202         struct irq_chip irq_chip;
203 #endif
204         atomic_t wakeup_path;
205
206         struct i2c_client *client;
207         struct gpio_chip gpio_chip;
208         const char *const *names;
209         unsigned long driver_data;
210         struct regulator *regulator;
211
212         const struct pca953x_reg_config *regs;
213 };
214
215 static int pca953x_bank_shift(struct pca953x_chip *chip)
216 {
217         return fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
218 }
219
220 #define PCA953x_BANK_INPUT      BIT(0)
221 #define PCA953x_BANK_OUTPUT     BIT(1)
222 #define PCA953x_BANK_POLARITY   BIT(2)
223 #define PCA953x_BANK_CONFIG     BIT(3)
224
225 #define PCA957x_BANK_INPUT      BIT(0)
226 #define PCA957x_BANK_POLARITY   BIT(1)
227 #define PCA957x_BANK_BUSHOLD    BIT(2)
228 #define PCA957x_BANK_CONFIG     BIT(4)
229 #define PCA957x_BANK_OUTPUT     BIT(5)
230
231 #define PCAL9xxx_BANK_IN_LATCH  BIT(8 + 2)
232 #define PCAL9xxx_BANK_PULL_EN   BIT(8 + 3)
233 #define PCAL9xxx_BANK_PULL_SEL  BIT(8 + 4)
234 #define PCAL9xxx_BANK_IRQ_MASK  BIT(8 + 5)
235 #define PCAL9xxx_BANK_IRQ_STAT  BIT(8 + 6)
236
237 /*
238  * We care about the following registers:
239  * - Standard set, below 0x40, each port can be replicated up to 8 times
240  *   - PCA953x standard
241  *     Input port                       0x00 + 0 * bank_size    R
242  *     Output port                      0x00 + 1 * bank_size    RW
243  *     Polarity Inversion port          0x00 + 2 * bank_size    RW
244  *     Configuration port               0x00 + 3 * bank_size    RW
245  *   - PCA957x with mixed up registers
246  *     Input port                       0x00 + 0 * bank_size    R
247  *     Polarity Inversion port          0x00 + 1 * bank_size    RW
248  *     Bus hold port                    0x00 + 2 * bank_size    RW
249  *     Configuration port               0x00 + 4 * bank_size    RW
250  *     Output port                      0x00 + 5 * bank_size    RW
251  *
252  * - Extended set, above 0x40, often chip specific.
253  *   - PCAL6524/PCAL9555A with custom PCAL IRQ handling:
254  *     Input latch register             0x40 + 2 * bank_size    RW
255  *     Pull-up/pull-down enable reg     0x40 + 3 * bank_size    RW
256  *     Pull-up/pull-down select reg     0x40 + 4 * bank_size    RW
257  *     Interrupt mask register          0x40 + 5 * bank_size    RW
258  *     Interrupt status register        0x40 + 6 * bank_size    R
259  *
260  * - Registers with bit 0x80 set, the AI bit
261  *   The bit is cleared and the registers fall into one of the
262  *   categories above.
263  */
264
265 static bool pca953x_check_register(struct pca953x_chip *chip, unsigned int reg,
266                                    u32 checkbank)
267 {
268         int bank_shift = pca953x_bank_shift(chip);
269         int bank = (reg & REG_ADDR_MASK) >> bank_shift;
270         int offset = reg & (BIT(bank_shift) - 1);
271
272         /* Special PCAL extended register check. */
273         if (reg & REG_ADDR_EXT) {
274                 if (!(chip->driver_data & PCA_PCAL))
275                         return false;
276                 bank += 8;
277         }
278
279         /* Register is not in the matching bank. */
280         if (!(BIT(bank) & checkbank))
281                 return false;
282
283         /* Register is not within allowed range of bank. */
284         if (offset >= NBANK(chip))
285                 return false;
286
287         return true;
288 }
289
290 static bool pca953x_readable_register(struct device *dev, unsigned int reg)
291 {
292         struct pca953x_chip *chip = dev_get_drvdata(dev);
293         u32 bank;
294
295         if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
296                 bank = PCA953x_BANK_INPUT | PCA953x_BANK_OUTPUT |
297                        PCA953x_BANK_POLARITY | PCA953x_BANK_CONFIG;
298         } else {
299                 bank = PCA957x_BANK_INPUT | PCA957x_BANK_OUTPUT |
300                        PCA957x_BANK_POLARITY | PCA957x_BANK_CONFIG |
301                        PCA957x_BANK_BUSHOLD;
302         }
303
304         if (chip->driver_data & PCA_PCAL) {
305                 bank |= PCAL9xxx_BANK_IN_LATCH | PCAL9xxx_BANK_PULL_EN |
306                         PCAL9xxx_BANK_PULL_SEL | PCAL9xxx_BANK_IRQ_MASK |
307                         PCAL9xxx_BANK_IRQ_STAT;
308         }
309
310         return pca953x_check_register(chip, reg, bank);
311 }
312
313 static bool pca953x_writeable_register(struct device *dev, unsigned int reg)
314 {
315         struct pca953x_chip *chip = dev_get_drvdata(dev);
316         u32 bank;
317
318         if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
319                 bank = PCA953x_BANK_OUTPUT | PCA953x_BANK_POLARITY |
320                         PCA953x_BANK_CONFIG;
321         } else {
322                 bank = PCA957x_BANK_OUTPUT | PCA957x_BANK_POLARITY |
323                         PCA957x_BANK_CONFIG | PCA957x_BANK_BUSHOLD;
324         }
325
326         if (chip->driver_data & PCA_PCAL)
327                 bank |= PCAL9xxx_BANK_IN_LATCH | PCAL9xxx_BANK_PULL_EN |
328                         PCAL9xxx_BANK_PULL_SEL | PCAL9xxx_BANK_IRQ_MASK;
329
330         return pca953x_check_register(chip, reg, bank);
331 }
332
333 static bool pca953x_volatile_register(struct device *dev, unsigned int reg)
334 {
335         struct pca953x_chip *chip = dev_get_drvdata(dev);
336         u32 bank;
337
338         if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
339                 bank = PCA953x_BANK_INPUT;
340         else
341                 bank = PCA957x_BANK_INPUT;
342
343         if (chip->driver_data & PCA_PCAL)
344                 bank |= PCAL9xxx_BANK_IRQ_STAT;
345
346         return pca953x_check_register(chip, reg, bank);
347 }
348
349 static const struct regmap_config pca953x_i2c_regmap = {
350         .reg_bits = 8,
351         .val_bits = 8,
352
353         .use_single_read = true,
354         .use_single_write = true,
355
356         .readable_reg = pca953x_readable_register,
357         .writeable_reg = pca953x_writeable_register,
358         .volatile_reg = pca953x_volatile_register,
359
360         .disable_locking = true,
361         .cache_type = REGCACHE_RBTREE,
362         .max_register = 0x7f,
363 };
364
365 static const struct regmap_config pca953x_ai_i2c_regmap = {
366         .reg_bits = 8,
367         .val_bits = 8,
368
369         .read_flag_mask = REG_ADDR_AI,
370         .write_flag_mask = REG_ADDR_AI,
371
372         .readable_reg = pca953x_readable_register,
373         .writeable_reg = pca953x_writeable_register,
374         .volatile_reg = pca953x_volatile_register,
375
376         .disable_locking = true,
377         .cache_type = REGCACHE_RBTREE,
378         .max_register = 0x7f,
379 };
380
381 static u8 pca953x_recalc_addr(struct pca953x_chip *chip, int reg, int off)
382 {
383         int bank_shift = pca953x_bank_shift(chip);
384         int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
385         int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
386         u8 regaddr = pinctrl | addr | (off / BANK_SZ);
387
388         return regaddr;
389 }
390
391 static int pca953x_write_regs(struct pca953x_chip *chip, int reg, unsigned long *val)
392 {
393         u8 regaddr = pca953x_recalc_addr(chip, reg, 0);
394         u8 value[MAX_BANK];
395         int i, ret;
396
397         for (i = 0; i < NBANK(chip); i++)
398                 value[i] = bitmap_get_value8(val, i * BANK_SZ);
399
400         ret = regmap_bulk_write(chip->regmap, regaddr, value, NBANK(chip));
401         if (ret < 0) {
402                 dev_err(&chip->client->dev, "failed writing register\n");
403                 return ret;
404         }
405
406         return 0;
407 }
408
409 static int pca953x_read_regs(struct pca953x_chip *chip, int reg, unsigned long *val)
410 {
411         u8 regaddr = pca953x_recalc_addr(chip, reg, 0);
412         u8 value[MAX_BANK];
413         int i, ret;
414
415         ret = regmap_bulk_read(chip->regmap, regaddr, value, NBANK(chip));
416         if (ret < 0) {
417                 dev_err(&chip->client->dev, "failed reading register\n");
418                 return ret;
419         }
420
421         for (i = 0; i < NBANK(chip); i++)
422                 bitmap_set_value8(val, value[i], i * BANK_SZ);
423
424         return 0;
425 }
426
427 static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
428 {
429         struct pca953x_chip *chip = gpiochip_get_data(gc);
430         u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
431         u8 bit = BIT(off % BANK_SZ);
432         int ret;
433
434         mutex_lock(&chip->i2c_lock);
435         ret = regmap_write_bits(chip->regmap, dirreg, bit, bit);
436         mutex_unlock(&chip->i2c_lock);
437         return ret;
438 }
439
440 static int pca953x_gpio_direction_output(struct gpio_chip *gc,
441                 unsigned off, int val)
442 {
443         struct pca953x_chip *chip = gpiochip_get_data(gc);
444         u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
445         u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off);
446         u8 bit = BIT(off % BANK_SZ);
447         int ret;
448
449         mutex_lock(&chip->i2c_lock);
450         /* set output level */
451         ret = regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
452         if (ret)
453                 goto exit;
454
455         /* then direction */
456         ret = regmap_write_bits(chip->regmap, dirreg, bit, 0);
457 exit:
458         mutex_unlock(&chip->i2c_lock);
459         return ret;
460 }
461
462 static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
463 {
464         struct pca953x_chip *chip = gpiochip_get_data(gc);
465         u8 inreg = pca953x_recalc_addr(chip, chip->regs->input, off);
466         u8 bit = BIT(off % BANK_SZ);
467         u32 reg_val;
468         int ret;
469
470         mutex_lock(&chip->i2c_lock);
471         ret = regmap_read(chip->regmap, inreg, &reg_val);
472         mutex_unlock(&chip->i2c_lock);
473         if (ret < 0)
474                 return ret;
475
476         return !!(reg_val & bit);
477 }
478
479 static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
480 {
481         struct pca953x_chip *chip = gpiochip_get_data(gc);
482         u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off);
483         u8 bit = BIT(off % BANK_SZ);
484
485         mutex_lock(&chip->i2c_lock);
486         regmap_write_bits(chip->regmap, outreg, bit, val ? bit : 0);
487         mutex_unlock(&chip->i2c_lock);
488 }
489
490 static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
491 {
492         struct pca953x_chip *chip = gpiochip_get_data(gc);
493         u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
494         u8 bit = BIT(off % BANK_SZ);
495         u32 reg_val;
496         int ret;
497
498         mutex_lock(&chip->i2c_lock);
499         ret = regmap_read(chip->regmap, dirreg, &reg_val);
500         mutex_unlock(&chip->i2c_lock);
501         if (ret < 0)
502                 return ret;
503
504         if (reg_val & bit)
505                 return GPIO_LINE_DIRECTION_IN;
506
507         return GPIO_LINE_DIRECTION_OUT;
508 }
509
510 static int pca953x_gpio_get_multiple(struct gpio_chip *gc,
511                                      unsigned long *mask, unsigned long *bits)
512 {
513         struct pca953x_chip *chip = gpiochip_get_data(gc);
514         DECLARE_BITMAP(reg_val, MAX_LINE);
515         int ret;
516
517         mutex_lock(&chip->i2c_lock);
518         ret = pca953x_read_regs(chip, chip->regs->input, reg_val);
519         mutex_unlock(&chip->i2c_lock);
520         if (ret)
521                 return ret;
522
523         bitmap_replace(bits, bits, reg_val, mask, gc->ngpio);
524         return 0;
525 }
526
527 static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
528                                       unsigned long *mask, unsigned long *bits)
529 {
530         struct pca953x_chip *chip = gpiochip_get_data(gc);
531         DECLARE_BITMAP(reg_val, MAX_LINE);
532         int ret;
533
534         mutex_lock(&chip->i2c_lock);
535         ret = pca953x_read_regs(chip, chip->regs->output, reg_val);
536         if (ret)
537                 goto exit;
538
539         bitmap_replace(reg_val, reg_val, bits, mask, gc->ngpio);
540
541         pca953x_write_regs(chip, chip->regs->output, reg_val);
542 exit:
543         mutex_unlock(&chip->i2c_lock);
544 }
545
546 static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
547                                          unsigned int offset,
548                                          unsigned long config)
549 {
550         u8 pull_en_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_EN, offset);
551         u8 pull_sel_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_SEL, offset);
552         u8 bit = BIT(offset % BANK_SZ);
553         int ret;
554
555         /*
556          * pull-up/pull-down configuration requires PCAL extended
557          * registers
558          */
559         if (!(chip->driver_data & PCA_PCAL))
560                 return -ENOTSUPP;
561
562         mutex_lock(&chip->i2c_lock);
563
564         /* Configure pull-up/pull-down */
565         if (config == PIN_CONFIG_BIAS_PULL_UP)
566                 ret = regmap_write_bits(chip->regmap, pull_sel_reg, bit, bit);
567         else if (config == PIN_CONFIG_BIAS_PULL_DOWN)
568                 ret = regmap_write_bits(chip->regmap, pull_sel_reg, bit, 0);
569         else
570                 ret = 0;
571         if (ret)
572                 goto exit;
573
574         /* Disable/Enable pull-up/pull-down */
575         if (config == PIN_CONFIG_BIAS_DISABLE)
576                 ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, 0);
577         else
578                 ret = regmap_write_bits(chip->regmap, pull_en_reg, bit, bit);
579
580 exit:
581         mutex_unlock(&chip->i2c_lock);
582         return ret;
583 }
584
585 static int pca953x_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
586                                    unsigned long config)
587 {
588         struct pca953x_chip *chip = gpiochip_get_data(gc);
589
590         switch (pinconf_to_config_param(config)) {
591         case PIN_CONFIG_BIAS_PULL_UP:
592         case PIN_CONFIG_BIAS_PULL_PIN_DEFAULT:
593         case PIN_CONFIG_BIAS_PULL_DOWN:
594         case PIN_CONFIG_BIAS_DISABLE:
595                 return pca953x_gpio_set_pull_up_down(chip, offset, config);
596         default:
597                 return -ENOTSUPP;
598         }
599 }
600
601 static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
602 {
603         struct gpio_chip *gc;
604
605         gc = &chip->gpio_chip;
606
607         gc->direction_input  = pca953x_gpio_direction_input;
608         gc->direction_output = pca953x_gpio_direction_output;
609         gc->get = pca953x_gpio_get_value;
610         gc->set = pca953x_gpio_set_value;
611         gc->get_direction = pca953x_gpio_get_direction;
612         gc->get_multiple = pca953x_gpio_get_multiple;
613         gc->set_multiple = pca953x_gpio_set_multiple;
614         gc->set_config = pca953x_gpio_set_config;
615         gc->can_sleep = true;
616
617         gc->base = chip->gpio_start;
618         gc->ngpio = gpios;
619         gc->label = dev_name(&chip->client->dev);
620         gc->parent = &chip->client->dev;
621         gc->owner = THIS_MODULE;
622         gc->names = chip->names;
623 }
624
625 #ifdef CONFIG_GPIO_PCA953X_IRQ
626 static void pca953x_irq_mask(struct irq_data *d)
627 {
628         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
629         struct pca953x_chip *chip = gpiochip_get_data(gc);
630         irq_hw_number_t hwirq = irqd_to_hwirq(d);
631
632         clear_bit(hwirq, chip->irq_mask);
633 }
634
635 static void pca953x_irq_unmask(struct irq_data *d)
636 {
637         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
638         struct pca953x_chip *chip = gpiochip_get_data(gc);
639         irq_hw_number_t hwirq = irqd_to_hwirq(d);
640
641         set_bit(hwirq, chip->irq_mask);
642 }
643
644 static int pca953x_irq_set_wake(struct irq_data *d, unsigned int on)
645 {
646         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
647         struct pca953x_chip *chip = gpiochip_get_data(gc);
648
649         if (on)
650                 atomic_inc(&chip->wakeup_path);
651         else
652                 atomic_dec(&chip->wakeup_path);
653
654         return irq_set_irq_wake(chip->client->irq, on);
655 }
656
657 static void pca953x_irq_bus_lock(struct irq_data *d)
658 {
659         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
660         struct pca953x_chip *chip = gpiochip_get_data(gc);
661
662         mutex_lock(&chip->irq_lock);
663 }
664
665 static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
666 {
667         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
668         struct pca953x_chip *chip = gpiochip_get_data(gc);
669         DECLARE_BITMAP(irq_mask, MAX_LINE);
670         DECLARE_BITMAP(reg_direction, MAX_LINE);
671         int level;
672
673         if (chip->driver_data & PCA_PCAL) {
674                 /* Enable latch on interrupt-enabled inputs */
675                 pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask);
676
677                 bitmap_complement(irq_mask, chip->irq_mask, gc->ngpio);
678
679                 /* Unmask enabled interrupts */
680                 pca953x_write_regs(chip, PCAL953X_INT_MASK, irq_mask);
681         }
682
683         /* Switch direction to input if needed */
684         pca953x_read_regs(chip, chip->regs->direction, reg_direction);
685
686         bitmap_or(irq_mask, chip->irq_trig_fall, chip->irq_trig_raise, gc->ngpio);
687         bitmap_complement(reg_direction, reg_direction, gc->ngpio);
688         bitmap_and(irq_mask, irq_mask, reg_direction, gc->ngpio);
689
690         /* Look for any newly setup interrupt */
691         for_each_set_bit(level, irq_mask, gc->ngpio)
692                 pca953x_gpio_direction_input(&chip->gpio_chip, level);
693
694         mutex_unlock(&chip->irq_lock);
695 }
696
697 static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
698 {
699         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
700         struct pca953x_chip *chip = gpiochip_get_data(gc);
701         irq_hw_number_t hwirq = irqd_to_hwirq(d);
702
703         if (!(type & IRQ_TYPE_EDGE_BOTH)) {
704                 dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
705                         d->irq, type);
706                 return -EINVAL;
707         }
708
709         assign_bit(hwirq, chip->irq_trig_fall, type & IRQ_TYPE_EDGE_FALLING);
710         assign_bit(hwirq, chip->irq_trig_raise, type & IRQ_TYPE_EDGE_RISING);
711
712         return 0;
713 }
714
715 static void pca953x_irq_shutdown(struct irq_data *d)
716 {
717         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
718         struct pca953x_chip *chip = gpiochip_get_data(gc);
719         irq_hw_number_t hwirq = irqd_to_hwirq(d);
720
721         clear_bit(hwirq, chip->irq_trig_raise);
722         clear_bit(hwirq, chip->irq_trig_fall);
723 }
724
725 static bool pca953x_irq_pending(struct pca953x_chip *chip, unsigned long *pending)
726 {
727         struct gpio_chip *gc = &chip->gpio_chip;
728         DECLARE_BITMAP(reg_direction, MAX_LINE);
729         DECLARE_BITMAP(old_stat, MAX_LINE);
730         DECLARE_BITMAP(cur_stat, MAX_LINE);
731         DECLARE_BITMAP(new_stat, MAX_LINE);
732         DECLARE_BITMAP(trigger, MAX_LINE);
733         int ret;
734
735         if (chip->driver_data & PCA_PCAL) {
736                 /* Read the current interrupt status from the device */
737                 ret = pca953x_read_regs(chip, PCAL953X_INT_STAT, trigger);
738                 if (ret)
739                         return false;
740
741                 /* Check latched inputs and clear interrupt status */
742                 ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
743                 if (ret)
744                         return false;
745
746                 /* Apply filter for rising/falling edge selection */
747                 bitmap_replace(new_stat, chip->irq_trig_fall, chip->irq_trig_raise, cur_stat, gc->ngpio);
748
749                 bitmap_and(pending, new_stat, trigger, gc->ngpio);
750
751                 return !bitmap_empty(pending, gc->ngpio);
752         }
753
754         ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
755         if (ret)
756                 return false;
757
758         /* Remove output pins from the equation */
759         pca953x_read_regs(chip, chip->regs->direction, reg_direction);
760
761         bitmap_copy(old_stat, chip->irq_stat, gc->ngpio);
762
763         bitmap_and(new_stat, cur_stat, reg_direction, gc->ngpio);
764         bitmap_xor(cur_stat, new_stat, old_stat, gc->ngpio);
765         bitmap_and(trigger, cur_stat, chip->irq_mask, gc->ngpio);
766
767         bitmap_copy(chip->irq_stat, new_stat, gc->ngpio);
768
769         if (bitmap_empty(trigger, gc->ngpio))
770                 return false;
771
772         bitmap_and(cur_stat, chip->irq_trig_fall, old_stat, gc->ngpio);
773         bitmap_and(old_stat, chip->irq_trig_raise, new_stat, gc->ngpio);
774         bitmap_or(new_stat, old_stat, cur_stat, gc->ngpio);
775         bitmap_and(pending, new_stat, trigger, gc->ngpio);
776
777         return !bitmap_empty(pending, gc->ngpio);
778 }
779
780 static irqreturn_t pca953x_irq_handler(int irq, void *devid)
781 {
782         struct pca953x_chip *chip = devid;
783         struct gpio_chip *gc = &chip->gpio_chip;
784         DECLARE_BITMAP(pending, MAX_LINE);
785         int level;
786         bool ret;
787
788         bitmap_zero(pending, MAX_LINE);
789
790         mutex_lock(&chip->i2c_lock);
791         ret = pca953x_irq_pending(chip, pending);
792         mutex_unlock(&chip->i2c_lock);
793
794         if (ret) {
795                 ret = 0;
796
797                 for_each_set_bit(level, pending, gc->ngpio) {
798                         int nested_irq = irq_find_mapping(gc->irq.domain, level);
799
800                         if (unlikely(nested_irq <= 0)) {
801                                 dev_warn_ratelimited(gc->parent, "unmapped interrupt %d\n", level);
802                                 continue;
803                         }
804
805                         handle_nested_irq(nested_irq);
806                         ret = 1;
807                 }
808         }
809
810         return IRQ_RETVAL(ret);
811 }
812
813 static int pca953x_irq_setup(struct pca953x_chip *chip, int irq_base)
814 {
815         struct i2c_client *client = chip->client;
816         struct irq_chip *irq_chip = &chip->irq_chip;
817         DECLARE_BITMAP(reg_direction, MAX_LINE);
818         DECLARE_BITMAP(irq_stat, MAX_LINE);
819         struct gpio_irq_chip *girq;
820         int ret;
821
822         if (dmi_first_match(pca953x_dmi_acpi_irq_info)) {
823                 ret = pca953x_acpi_get_irq(&client->dev);
824                 if (ret > 0)
825                         client->irq = ret;
826         }
827
828         if (!client->irq)
829                 return 0;
830
831         if (irq_base == -1)
832                 return 0;
833
834         if (!(chip->driver_data & PCA_INT))
835                 return 0;
836
837         ret = pca953x_read_regs(chip, chip->regs->input, irq_stat);
838         if (ret)
839                 return ret;
840
841         /*
842          * There is no way to know which GPIO line generated the
843          * interrupt.  We have to rely on the previous read for
844          * this purpose.
845          */
846         pca953x_read_regs(chip, chip->regs->direction, reg_direction);
847         bitmap_and(chip->irq_stat, irq_stat, reg_direction, chip->gpio_chip.ngpio);
848         mutex_init(&chip->irq_lock);
849
850         irq_chip->name = dev_name(&client->dev);
851         irq_chip->irq_mask = pca953x_irq_mask;
852         irq_chip->irq_unmask = pca953x_irq_unmask;
853         irq_chip->irq_set_wake = pca953x_irq_set_wake;
854         irq_chip->irq_bus_lock = pca953x_irq_bus_lock;
855         irq_chip->irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock;
856         irq_chip->irq_set_type = pca953x_irq_set_type;
857         irq_chip->irq_shutdown = pca953x_irq_shutdown;
858
859         girq = &chip->gpio_chip.irq;
860         girq->chip = irq_chip;
861         /* This will let us handle the parent IRQ in the driver */
862         girq->parent_handler = NULL;
863         girq->num_parents = 0;
864         girq->parents = NULL;
865         girq->default_type = IRQ_TYPE_NONE;
866         girq->handler = handle_simple_irq;
867         girq->threaded = true;
868         girq->first = irq_base; /* FIXME: get rid of this */
869
870         ret = devm_request_threaded_irq(&client->dev, client->irq,
871                                         NULL, pca953x_irq_handler,
872                                         IRQF_ONESHOT | IRQF_SHARED,
873                                         dev_name(&client->dev), chip);
874         if (ret) {
875                 dev_err(&client->dev, "failed to request irq %d\n",
876                         client->irq);
877                 return ret;
878         }
879
880         return 0;
881 }
882
883 #else /* CONFIG_GPIO_PCA953X_IRQ */
884 static int pca953x_irq_setup(struct pca953x_chip *chip,
885                              int irq_base)
886 {
887         struct i2c_client *client = chip->client;
888
889         if (client->irq && irq_base != -1 && (chip->driver_data & PCA_INT))
890                 dev_warn(&client->dev, "interrupt support not compiled in\n");
891
892         return 0;
893 }
894 #endif
895
896 static int device_pca95xx_init(struct pca953x_chip *chip, u32 invert)
897 {
898         DECLARE_BITMAP(val, MAX_LINE);
899         u8 regaddr;
900         int ret;
901
902         regaddr = pca953x_recalc_addr(chip, chip->regs->output, 0);
903         ret = regcache_sync_region(chip->regmap, regaddr,
904                                    regaddr + NBANK(chip) - 1);
905         if (ret)
906                 goto out;
907
908         regaddr = pca953x_recalc_addr(chip, chip->regs->direction, 0);
909         ret = regcache_sync_region(chip->regmap, regaddr,
910                                    regaddr + NBANK(chip) - 1);
911         if (ret)
912                 goto out;
913
914         /* set platform specific polarity inversion */
915         if (invert)
916                 bitmap_fill(val, MAX_LINE);
917         else
918                 bitmap_zero(val, MAX_LINE);
919
920         ret = pca953x_write_regs(chip, chip->regs->invert, val);
921 out:
922         return ret;
923 }
924
925 static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
926 {
927         DECLARE_BITMAP(val, MAX_LINE);
928         unsigned int i;
929         int ret;
930
931         ret = device_pca95xx_init(chip, invert);
932         if (ret)
933                 goto out;
934
935         /* To enable register 6, 7 to control pull up and pull down */
936         for (i = 0; i < NBANK(chip); i++)
937                 bitmap_set_value8(val, 0x02, i * BANK_SZ);
938
939         ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
940         if (ret)
941                 goto out;
942
943         return 0;
944 out:
945         return ret;
946 }
947
948 static int pca953x_probe(struct i2c_client *client,
949                          const struct i2c_device_id *i2c_id)
950 {
951         struct pca953x_platform_data *pdata;
952         struct pca953x_chip *chip;
953         int irq_base = 0;
954         int ret;
955         u32 invert = 0;
956         struct regulator *reg;
957         const struct regmap_config *regmap_config;
958
959         chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
960         if (chip == NULL)
961                 return -ENOMEM;
962
963         pdata = dev_get_platdata(&client->dev);
964         if (pdata) {
965                 irq_base = pdata->irq_base;
966                 chip->gpio_start = pdata->gpio_base;
967                 invert = pdata->invert;
968                 chip->names = pdata->names;
969         } else {
970                 struct gpio_desc *reset_gpio;
971
972                 chip->gpio_start = -1;
973                 irq_base = 0;
974
975                 /*
976                  * See if we need to de-assert a reset pin.
977                  *
978                  * There is no known ACPI-enabled platforms that are
979                  * using "reset" GPIO. Otherwise any of those platform
980                  * must use _DSD method with corresponding property.
981                  */
982                 reset_gpio = devm_gpiod_get_optional(&client->dev, "reset",
983                                                      GPIOD_OUT_LOW);
984                 if (IS_ERR(reset_gpio))
985                         return PTR_ERR(reset_gpio);
986         }
987
988         chip->client = client;
989
990         reg = devm_regulator_get(&client->dev, "vcc");
991         if (IS_ERR(reg))
992                 return dev_err_probe(&client->dev, PTR_ERR(reg), "reg get err\n");
993
994         ret = regulator_enable(reg);
995         if (ret) {
996                 dev_err(&client->dev, "reg en err: %d\n", ret);
997                 return ret;
998         }
999         chip->regulator = reg;
1000
1001         if (i2c_id) {
1002                 chip->driver_data = i2c_id->driver_data;
1003         } else {
1004                 const void *match;
1005
1006                 match = device_get_match_data(&client->dev);
1007                 if (!match) {
1008                         ret = -ENODEV;
1009                         goto err_exit;
1010                 }
1011
1012                 chip->driver_data = (uintptr_t)match;
1013         }
1014
1015         i2c_set_clientdata(client, chip);
1016
1017         pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
1018
1019         if (NBANK(chip) > 2 || PCA_CHIP_TYPE(chip->driver_data) == PCA957X_TYPE) {
1020                 dev_info(&client->dev, "using AI\n");
1021                 regmap_config = &pca953x_ai_i2c_regmap;
1022         } else {
1023                 dev_info(&client->dev, "using no AI\n");
1024                 regmap_config = &pca953x_i2c_regmap;
1025         }
1026
1027         chip->regmap = devm_regmap_init_i2c(client, regmap_config);
1028         if (IS_ERR(chip->regmap)) {
1029                 ret = PTR_ERR(chip->regmap);
1030                 goto err_exit;
1031         }
1032
1033         regcache_mark_dirty(chip->regmap);
1034
1035         mutex_init(&chip->i2c_lock);
1036         /*
1037          * In case we have an i2c-mux controlled by a GPIO provided by an
1038          * expander using the same driver higher on the device tree, read the
1039          * i2c adapter nesting depth and use the retrieved value as lockdep
1040          * subclass for chip->i2c_lock.
1041          *
1042          * REVISIT: This solution is not complete. It protects us from lockdep
1043          * false positives when the expander controlling the i2c-mux is on
1044          * a different level on the device tree, but not when it's on the same
1045          * level on a different branch (in which case the subclass number
1046          * would be the same).
1047          *
1048          * TODO: Once a correct solution is developed, a similar fix should be
1049          * applied to all other i2c-controlled GPIO expanders (and potentially
1050          * regmap-i2c).
1051          */
1052         lockdep_set_subclass(&chip->i2c_lock,
1053                              i2c_adapter_depth(client->adapter));
1054
1055         /* initialize cached registers from their original values.
1056          * we can't share this chip with another i2c master.
1057          */
1058
1059         if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
1060                 chip->regs = &pca953x_regs;
1061                 ret = device_pca95xx_init(chip, invert);
1062         } else {
1063                 chip->regs = &pca957x_regs;
1064                 ret = device_pca957x_init(chip, invert);
1065         }
1066         if (ret)
1067                 goto err_exit;
1068
1069         ret = pca953x_irq_setup(chip, irq_base);
1070         if (ret)
1071                 goto err_exit;
1072
1073         ret = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip);
1074         if (ret)
1075                 goto err_exit;
1076
1077         if (pdata && pdata->setup) {
1078                 ret = pdata->setup(client, chip->gpio_chip.base,
1079                                    chip->gpio_chip.ngpio, pdata->context);
1080                 if (ret < 0)
1081                         dev_warn(&client->dev, "setup failed, %d\n", ret);
1082         }
1083
1084         return 0;
1085
1086 err_exit:
1087         regulator_disable(chip->regulator);
1088         return ret;
1089 }
1090
1091 static int pca953x_remove(struct i2c_client *client)
1092 {
1093         struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev);
1094         struct pca953x_chip *chip = i2c_get_clientdata(client);
1095         int ret;
1096
1097         if (pdata && pdata->teardown) {
1098                 ret = pdata->teardown(client, chip->gpio_chip.base,
1099                                       chip->gpio_chip.ngpio, pdata->context);
1100                 if (ret < 0)
1101                         dev_err(&client->dev, "teardown failed, %d\n", ret);
1102         } else {
1103                 ret = 0;
1104         }
1105
1106         regulator_disable(chip->regulator);
1107
1108         return ret;
1109 }
1110
1111 #ifdef CONFIG_PM_SLEEP
1112 static int pca953x_regcache_sync(struct device *dev)
1113 {
1114         struct pca953x_chip *chip = dev_get_drvdata(dev);
1115         int ret;
1116         u8 regaddr;
1117
1118         /*
1119          * The ordering between direction and output is important,
1120          * sync these registers first and only then sync the rest.
1121          */
1122         regaddr = pca953x_recalc_addr(chip, chip->regs->direction, 0);
1123         ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip) - 1);
1124         if (ret) {
1125                 dev_err(dev, "Failed to sync GPIO dir registers: %d\n", ret);
1126                 return ret;
1127         }
1128
1129         regaddr = pca953x_recalc_addr(chip, chip->regs->output, 0);
1130         ret = regcache_sync_region(chip->regmap, regaddr, regaddr + NBANK(chip) - 1);
1131         if (ret) {
1132                 dev_err(dev, "Failed to sync GPIO out registers: %d\n", ret);
1133                 return ret;
1134         }
1135
1136 #ifdef CONFIG_GPIO_PCA953X_IRQ
1137         if (chip->driver_data & PCA_PCAL) {
1138                 regaddr = pca953x_recalc_addr(chip, PCAL953X_IN_LATCH, 0);
1139                 ret = regcache_sync_region(chip->regmap, regaddr,
1140                                            regaddr + NBANK(chip) - 1);
1141                 if (ret) {
1142                         dev_err(dev, "Failed to sync INT latch registers: %d\n",
1143                                 ret);
1144                         return ret;
1145                 }
1146
1147                 regaddr = pca953x_recalc_addr(chip, PCAL953X_INT_MASK, 0);
1148                 ret = regcache_sync_region(chip->regmap, regaddr,
1149                                            regaddr + NBANK(chip) - 1);
1150                 if (ret) {
1151                         dev_err(dev, "Failed to sync INT mask registers: %d\n",
1152                                 ret);
1153                         return ret;
1154                 }
1155         }
1156 #endif
1157
1158         return 0;
1159 }
1160
1161 static int pca953x_suspend(struct device *dev)
1162 {
1163         struct pca953x_chip *chip = dev_get_drvdata(dev);
1164
1165         mutex_lock(&chip->i2c_lock);
1166         regcache_cache_only(chip->regmap, true);
1167         mutex_unlock(&chip->i2c_lock);
1168
1169         if (atomic_read(&chip->wakeup_path))
1170                 device_set_wakeup_path(dev);
1171         else
1172                 regulator_disable(chip->regulator);
1173
1174         return 0;
1175 }
1176
1177 static int pca953x_resume(struct device *dev)
1178 {
1179         struct pca953x_chip *chip = dev_get_drvdata(dev);
1180         int ret;
1181
1182         if (!atomic_read(&chip->wakeup_path)) {
1183                 ret = regulator_enable(chip->regulator);
1184                 if (ret) {
1185                         dev_err(dev, "Failed to enable regulator: %d\n", ret);
1186                         return 0;
1187                 }
1188         }
1189
1190         mutex_lock(&chip->i2c_lock);
1191         regcache_cache_only(chip->regmap, false);
1192         regcache_mark_dirty(chip->regmap);
1193         ret = pca953x_regcache_sync(dev);
1194         if (ret) {
1195                 mutex_unlock(&chip->i2c_lock);
1196                 return ret;
1197         }
1198
1199         ret = regcache_sync(chip->regmap);
1200         mutex_unlock(&chip->i2c_lock);
1201         if (ret) {
1202                 dev_err(dev, "Failed to restore register map: %d\n", ret);
1203                 return ret;
1204         }
1205
1206         return 0;
1207 }
1208 #endif
1209
1210 /* convenience to stop overlong match-table lines */
1211 #define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int)
1212 #define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int)
1213
1214 static const struct of_device_id pca953x_dt_ids[] = {
1215         { .compatible = "nxp,pca6416", .data = OF_953X(16, PCA_INT), },
1216         { .compatible = "nxp,pca9505", .data = OF_953X(40, PCA_INT), },
1217         { .compatible = "nxp,pca9534", .data = OF_953X( 8, PCA_INT), },
1218         { .compatible = "nxp,pca9535", .data = OF_953X(16, PCA_INT), },
1219         { .compatible = "nxp,pca9536", .data = OF_953X( 4, 0), },
1220         { .compatible = "nxp,pca9537", .data = OF_953X( 4, PCA_INT), },
1221         { .compatible = "nxp,pca9538", .data = OF_953X( 8, PCA_INT), },
1222         { .compatible = "nxp,pca9539", .data = OF_953X(16, PCA_INT), },
1223         { .compatible = "nxp,pca9554", .data = OF_953X( 8, PCA_INT), },
1224         { .compatible = "nxp,pca9555", .data = OF_953X(16, PCA_INT), },
1225         { .compatible = "nxp,pca9556", .data = OF_953X( 8, 0), },
1226         { .compatible = "nxp,pca9557", .data = OF_953X( 8, 0), },
1227         { .compatible = "nxp,pca9574", .data = OF_957X( 8, PCA_INT), },
1228         { .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), },
1229         { .compatible = "nxp,pca9698", .data = OF_953X(40, 0), },
1230
1231         { .compatible = "nxp,pcal6416", .data = OF_953X(16, PCA_LATCH_INT), },
1232         { .compatible = "nxp,pcal6524", .data = OF_953X(24, PCA_LATCH_INT), },
1233         { .compatible = "nxp,pcal9535", .data = OF_953X(16, PCA_LATCH_INT), },
1234         { .compatible = "nxp,pcal9554b", .data = OF_953X( 8, PCA_LATCH_INT), },
1235         { .compatible = "nxp,pcal9555a", .data = OF_953X(16, PCA_LATCH_INT), },
1236
1237         { .compatible = "maxim,max7310", .data = OF_953X( 8, 0), },
1238         { .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), },
1239         { .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), },
1240         { .compatible = "maxim,max7315", .data = OF_953X( 8, PCA_INT), },
1241         { .compatible = "maxim,max7318", .data = OF_953X(16, PCA_INT), },
1242
1243         { .compatible = "ti,pca6107", .data = OF_953X( 8, PCA_INT), },
1244         { .compatible = "ti,pca9536", .data = OF_953X( 4, 0), },
1245         { .compatible = "ti,tca6408", .data = OF_953X( 8, PCA_INT), },
1246         { .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), },
1247         { .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), },
1248         { .compatible = "ti,tca9539", .data = OF_953X(16, PCA_INT), },
1249
1250         { .compatible = "onnn,cat9554", .data = OF_953X( 8, PCA_INT), },
1251         { .compatible = "onnn,pca9654", .data = OF_953X( 8, PCA_INT), },
1252         { .compatible = "onnn,pca9655", .data = OF_953X(16, PCA_INT), },
1253
1254         { .compatible = "exar,xra1202", .data = OF_953X( 8, 0), },
1255         { }
1256 };
1257
1258 MODULE_DEVICE_TABLE(of, pca953x_dt_ids);
1259
1260 static SIMPLE_DEV_PM_OPS(pca953x_pm_ops, pca953x_suspend, pca953x_resume);
1261
1262 static struct i2c_driver pca953x_driver = {
1263         .driver = {
1264                 .name   = "pca953x",
1265                 .pm     = &pca953x_pm_ops,
1266                 .of_match_table = pca953x_dt_ids,
1267                 .acpi_match_table = pca953x_acpi_ids,
1268         },
1269         .probe          = pca953x_probe,
1270         .remove         = pca953x_remove,
1271         .id_table       = pca953x_id,
1272 };
1273
1274 static int __init pca953x_init(void)
1275 {
1276         return i2c_add_driver(&pca953x_driver);
1277 }
1278 /* register after i2c postcore initcall and before
1279  * subsys initcalls that may rely on these GPIOs
1280  */
1281 subsys_initcall(pca953x_init);
1282
1283 static void __exit pca953x_exit(void)
1284 {
1285         i2c_del_driver(&pca953x_driver);
1286 }
1287 module_exit(pca953x_exit);
1288
1289 MODULE_AUTHOR("eric miao <eric.miao@marvell.com>");
1290 MODULE_DESCRIPTION("GPIO expander driver for PCA953x");
1291 MODULE_LICENSE("GPL");