2 * PCA953x 4/8/16/24/40 bit I/O ports
4 * Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
5 * Copyright (C) 2007 Marvell International Ltd.
7 * Derived from drivers/i2c/chips/pca9539.c
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2 of the License.
14 #include <linux/module.h>
15 #include <linux/init.h>
16 #include <linux/gpio.h>
17 #include <linux/interrupt.h>
18 #include <linux/i2c.h>
19 #include <linux/platform_data/pca953x.h>
20 #include <linux/slab.h>
21 #include <asm/unaligned.h>
22 #include <linux/of_platform.h>
23 #include <linux/acpi.h>
24 #include <linux/regulator/consumer.h>
26 #define PCA953X_INPUT 0
27 #define PCA953X_OUTPUT 1
28 #define PCA953X_INVERT 2
29 #define PCA953X_DIRECTION 3
31 #define REG_ADDR_AI 0x80
34 #define PCA957X_INVRT 1
35 #define PCA957X_BKEN 2
36 #define PCA957X_PUPD 3
40 #define PCA957X_INTS 7
42 #define PCAL953X_IN_LATCH 34
43 #define PCAL953X_INT_MASK 37
44 #define PCAL953X_INT_STAT 38
46 #define PCA_GPIO_MASK 0x00FF
47 #define PCA_INT 0x0100
48 #define PCA_PCAL 0x0200
49 #define PCA953X_TYPE 0x1000
50 #define PCA957X_TYPE 0x2000
51 #define PCA_TYPE_MASK 0xF000
53 #define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK)
55 static const struct i2c_device_id pca953x_id[] = {
56 { "pca9505", 40 | PCA953X_TYPE | PCA_INT, },
57 { "pca9534", 8 | PCA953X_TYPE | PCA_INT, },
58 { "pca9535", 16 | PCA953X_TYPE | PCA_INT, },
59 { "pca9536", 4 | PCA953X_TYPE, },
60 { "pca9537", 4 | PCA953X_TYPE | PCA_INT, },
61 { "pca9538", 8 | PCA953X_TYPE | PCA_INT, },
62 { "pca9539", 16 | PCA953X_TYPE | PCA_INT, },
63 { "pca9554", 8 | PCA953X_TYPE | PCA_INT, },
64 { "pca9555", 16 | PCA953X_TYPE | PCA_INT, },
65 { "pca9556", 8 | PCA953X_TYPE, },
66 { "pca9557", 8 | PCA953X_TYPE, },
67 { "pca9574", 8 | PCA957X_TYPE | PCA_INT, },
68 { "pca9575", 16 | PCA957X_TYPE | PCA_INT, },
69 { "pca9698", 40 | PCA953X_TYPE, },
71 { "pcal9555a", 16 | PCA953X_TYPE | PCA_INT | PCA_PCAL, },
73 { "max7310", 8 | PCA953X_TYPE, },
74 { "max7312", 16 | PCA953X_TYPE | PCA_INT, },
75 { "max7313", 16 | PCA953X_TYPE | PCA_INT, },
76 { "max7315", 8 | PCA953X_TYPE | PCA_INT, },
77 { "pca6107", 8 | PCA953X_TYPE | PCA_INT, },
78 { "tca6408", 8 | PCA953X_TYPE | PCA_INT, },
79 { "tca6416", 16 | PCA953X_TYPE | PCA_INT, },
80 { "tca6424", 24 | PCA953X_TYPE | PCA_INT, },
81 { "tca9539", 16 | PCA953X_TYPE | PCA_INT, },
82 { "xra1202", 8 | PCA953X_TYPE },
85 MODULE_DEVICE_TABLE(i2c, pca953x_id);
87 static const struct acpi_device_id pca953x_acpi_ids[] = {
88 { "INT3491", 16 | PCA953X_TYPE | PCA_INT | PCA_PCAL, },
91 MODULE_DEVICE_TABLE(acpi, pca953x_acpi_ids);
96 #define NBANK(chip) DIV_ROUND_UP(chip->gpio_chip.ngpio, BANK_SZ)
98 struct pca953x_reg_config {
104 static const struct pca953x_reg_config pca953x_regs = {
105 .direction = PCA953X_DIRECTION,
106 .output = PCA953X_OUTPUT,
107 .input = PCA953X_INPUT,
110 static const struct pca953x_reg_config pca957x_regs = {
111 .direction = PCA957X_CFG,
112 .output = PCA957X_OUT,
116 struct pca953x_chip {
118 u8 reg_output[MAX_BANK];
119 u8 reg_direction[MAX_BANK];
120 struct mutex i2c_lock;
122 #ifdef CONFIG_GPIO_PCA953X_IRQ
123 struct mutex irq_lock;
124 u8 irq_mask[MAX_BANK];
125 u8 irq_stat[MAX_BANK];
126 u8 irq_trig_raise[MAX_BANK];
127 u8 irq_trig_fall[MAX_BANK];
130 struct i2c_client *client;
131 struct gpio_chip gpio_chip;
132 const char *const *names;
133 unsigned long driver_data;
134 struct regulator *regulator;
136 const struct pca953x_reg_config *regs;
138 int (*write_regs)(struct pca953x_chip *, int, u8 *);
139 int (*read_regs)(struct pca953x_chip *, int, u8 *);
142 static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val,
146 int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
147 int offset = off / BANK_SZ;
149 ret = i2c_smbus_read_byte_data(chip->client,
150 (reg << bank_shift) + offset);
154 dev_err(&chip->client->dev, "failed reading register\n");
161 static int pca953x_write_single(struct pca953x_chip *chip, int reg, u32 val,
165 int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
166 int offset = off / BANK_SZ;
168 ret = i2c_smbus_write_byte_data(chip->client,
169 (reg << bank_shift) + offset, val);
172 dev_err(&chip->client->dev, "failed writing register\n");
179 static int pca953x_write_regs_8(struct pca953x_chip *chip, int reg, u8 *val)
181 return i2c_smbus_write_byte_data(chip->client, reg, *val);
184 static int pca953x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
186 __le16 word = cpu_to_le16(get_unaligned((u16 *)val));
188 return i2c_smbus_write_word_data(chip->client,
189 reg << 1, (__force u16)word);
192 static int pca957x_write_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
196 ret = i2c_smbus_write_byte_data(chip->client, reg << 1, val[0]);
200 return i2c_smbus_write_byte_data(chip->client, (reg << 1) + 1, val[1]);
203 static int pca953x_write_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
205 int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
207 return i2c_smbus_write_i2c_block_data(chip->client,
208 (reg << bank_shift) | REG_ADDR_AI,
212 static int pca953x_write_regs(struct pca953x_chip *chip, int reg, u8 *val)
216 ret = chip->write_regs(chip, reg, val);
218 dev_err(&chip->client->dev, "failed writing register\n");
225 static int pca953x_read_regs_8(struct pca953x_chip *chip, int reg, u8 *val)
229 ret = i2c_smbus_read_byte_data(chip->client, reg);
235 static int pca953x_read_regs_16(struct pca953x_chip *chip, int reg, u8 *val)
239 ret = i2c_smbus_read_word_data(chip->client, reg << 1);
240 val[0] = (u16)ret & 0xFF;
241 val[1] = (u16)ret >> 8;
246 static int pca953x_read_regs_24(struct pca953x_chip *chip, int reg, u8 *val)
248 int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
250 return i2c_smbus_read_i2c_block_data(chip->client,
251 (reg << bank_shift) | REG_ADDR_AI,
255 static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val)
259 ret = chip->read_regs(chip, reg, val);
261 dev_err(&chip->client->dev, "failed reading register\n");
268 static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
270 struct pca953x_chip *chip = gpiochip_get_data(gc);
274 mutex_lock(&chip->i2c_lock);
275 reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ));
277 ret = pca953x_write_single(chip, chip->regs->direction, reg_val, off);
281 chip->reg_direction[off / BANK_SZ] = reg_val;
283 mutex_unlock(&chip->i2c_lock);
287 static int pca953x_gpio_direction_output(struct gpio_chip *gc,
288 unsigned off, int val)
290 struct pca953x_chip *chip = gpiochip_get_data(gc);
294 mutex_lock(&chip->i2c_lock);
295 /* set output level */
297 reg_val = chip->reg_output[off / BANK_SZ]
298 | (1u << (off % BANK_SZ));
300 reg_val = chip->reg_output[off / BANK_SZ]
301 & ~(1u << (off % BANK_SZ));
303 ret = pca953x_write_single(chip, chip->regs->output, reg_val, off);
307 chip->reg_output[off / BANK_SZ] = reg_val;
310 reg_val = chip->reg_direction[off / BANK_SZ] & ~(1u << (off % BANK_SZ));
311 ret = pca953x_write_single(chip, chip->regs->direction, reg_val, off);
315 chip->reg_direction[off / BANK_SZ] = reg_val;
317 mutex_unlock(&chip->i2c_lock);
321 static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
323 struct pca953x_chip *chip = gpiochip_get_data(gc);
327 mutex_lock(&chip->i2c_lock);
328 ret = pca953x_read_single(chip, chip->regs->input, ®_val, off);
329 mutex_unlock(&chip->i2c_lock);
331 /* NOTE: diagnostic already emitted; that's all we should
332 * do unless gpio_*_value_cansleep() calls become different
333 * from their nonsleeping siblings (and report faults).
338 return (reg_val & (1u << (off % BANK_SZ))) ? 1 : 0;
341 static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
343 struct pca953x_chip *chip = gpiochip_get_data(gc);
347 mutex_lock(&chip->i2c_lock);
349 reg_val = chip->reg_output[off / BANK_SZ]
350 | (1u << (off % BANK_SZ));
352 reg_val = chip->reg_output[off / BANK_SZ]
353 & ~(1u << (off % BANK_SZ));
355 ret = pca953x_write_single(chip, chip->regs->output, reg_val, off);
359 chip->reg_output[off / BANK_SZ] = reg_val;
361 mutex_unlock(&chip->i2c_lock);
364 static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
365 unsigned long *mask, unsigned long *bits)
367 struct pca953x_chip *chip = gpiochip_get_data(gc);
368 unsigned int bank_mask, bank_val;
369 int bank_shift, bank;
370 u8 reg_val[MAX_BANK];
373 bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
375 memcpy(reg_val, chip->reg_output, NBANK(chip));
376 mutex_lock(&chip->i2c_lock);
377 for (bank = 0; bank < NBANK(chip); bank++) {
378 bank_mask = mask[bank / sizeof(*mask)] >>
379 ((bank % sizeof(*mask)) * 8);
381 bank_val = bits[bank / sizeof(*bits)] >>
382 ((bank % sizeof(*bits)) * 8);
383 reg_val[bank] = (reg_val[bank] & ~bank_mask) | bank_val;
387 ret = i2c_smbus_write_i2c_block_data(chip->client,
388 chip->regs->output << bank_shift,
389 NBANK(chip), reg_val);
393 memcpy(chip->reg_output, reg_val, NBANK(chip));
395 mutex_unlock(&chip->i2c_lock);
398 static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
400 struct gpio_chip *gc;
402 gc = &chip->gpio_chip;
404 gc->direction_input = pca953x_gpio_direction_input;
405 gc->direction_output = pca953x_gpio_direction_output;
406 gc->get = pca953x_gpio_get_value;
407 gc->set = pca953x_gpio_set_value;
408 gc->set_multiple = pca953x_gpio_set_multiple;
409 gc->can_sleep = true;
411 gc->base = chip->gpio_start;
413 gc->label = chip->client->name;
414 gc->parent = &chip->client->dev;
415 gc->owner = THIS_MODULE;
416 gc->names = chip->names;
419 #ifdef CONFIG_GPIO_PCA953X_IRQ
420 static void pca953x_irq_mask(struct irq_data *d)
422 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
423 struct pca953x_chip *chip = gpiochip_get_data(gc);
425 chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ));
428 static void pca953x_irq_unmask(struct irq_data *d)
430 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
431 struct pca953x_chip *chip = gpiochip_get_data(gc);
433 chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ);
436 static void pca953x_irq_bus_lock(struct irq_data *d)
438 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
439 struct pca953x_chip *chip = gpiochip_get_data(gc);
441 mutex_lock(&chip->irq_lock);
444 static void pca953x_irq_bus_sync_unlock(struct irq_data *d)
446 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
447 struct pca953x_chip *chip = gpiochip_get_data(gc);
450 u8 invert_irq_mask[MAX_BANK];
452 if (chip->driver_data & PCA_PCAL) {
453 /* Enable latch on interrupt-enabled inputs */
454 pca953x_write_regs(chip, PCAL953X_IN_LATCH, chip->irq_mask);
456 for (i = 0; i < NBANK(chip); i++)
457 invert_irq_mask[i] = ~chip->irq_mask[i];
459 /* Unmask enabled interrupts */
460 pca953x_write_regs(chip, PCAL953X_INT_MASK, invert_irq_mask);
463 /* Look for any newly setup interrupt */
464 for (i = 0; i < NBANK(chip); i++) {
465 new_irqs = chip->irq_trig_fall[i] | chip->irq_trig_raise[i];
466 new_irqs &= ~chip->reg_direction[i];
469 level = __ffs(new_irqs);
470 pca953x_gpio_direction_input(&chip->gpio_chip,
471 level + (BANK_SZ * i));
472 new_irqs &= ~(1 << level);
476 mutex_unlock(&chip->irq_lock);
479 static int pca953x_irq_set_type(struct irq_data *d, unsigned int type)
481 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
482 struct pca953x_chip *chip = gpiochip_get_data(gc);
483 int bank_nb = d->hwirq / BANK_SZ;
484 u8 mask = 1 << (d->hwirq % BANK_SZ);
486 if (!(type & IRQ_TYPE_EDGE_BOTH)) {
487 dev_err(&chip->client->dev, "irq %d: unsupported type %d\n",
492 if (type & IRQ_TYPE_EDGE_FALLING)
493 chip->irq_trig_fall[bank_nb] |= mask;
495 chip->irq_trig_fall[bank_nb] &= ~mask;
497 if (type & IRQ_TYPE_EDGE_RISING)
498 chip->irq_trig_raise[bank_nb] |= mask;
500 chip->irq_trig_raise[bank_nb] &= ~mask;
505 static struct irq_chip pca953x_irq_chip = {
507 .irq_mask = pca953x_irq_mask,
508 .irq_unmask = pca953x_irq_unmask,
509 .irq_bus_lock = pca953x_irq_bus_lock,
510 .irq_bus_sync_unlock = pca953x_irq_bus_sync_unlock,
511 .irq_set_type = pca953x_irq_set_type,
514 static bool pca953x_irq_pending(struct pca953x_chip *chip, u8 *pending)
516 u8 cur_stat[MAX_BANK];
517 u8 old_stat[MAX_BANK];
518 bool pending_seen = false;
519 bool trigger_seen = false;
520 u8 trigger[MAX_BANK];
523 if (chip->driver_data & PCA_PCAL) {
524 /* Read the current interrupt status from the device */
525 ret = pca953x_read_regs(chip, PCAL953X_INT_STAT, trigger);
529 /* Check latched inputs and clear interrupt status */
530 ret = pca953x_read_regs(chip, PCA953X_INPUT, cur_stat);
534 for (i = 0; i < NBANK(chip); i++) {
535 /* Apply filter for rising/falling edge selection */
536 pending[i] = (~cur_stat[i] & chip->irq_trig_fall[i]) |
537 (cur_stat[i] & chip->irq_trig_raise[i]);
538 pending[i] &= trigger[i];
546 ret = pca953x_read_regs(chip, chip->regs->input, cur_stat);
550 /* Remove output pins from the equation */
551 for (i = 0; i < NBANK(chip); i++)
552 cur_stat[i] &= chip->reg_direction[i];
554 memcpy(old_stat, chip->irq_stat, NBANK(chip));
556 for (i = 0; i < NBANK(chip); i++) {
557 trigger[i] = (cur_stat[i] ^ old_stat[i]) & chip->irq_mask[i];
565 memcpy(chip->irq_stat, cur_stat, NBANK(chip));
567 for (i = 0; i < NBANK(chip); i++) {
568 pending[i] = (old_stat[i] & chip->irq_trig_fall[i]) |
569 (cur_stat[i] & chip->irq_trig_raise[i]);
570 pending[i] &= trigger[i];
578 static irqreturn_t pca953x_irq_handler(int irq, void *devid)
580 struct pca953x_chip *chip = devid;
581 u8 pending[MAX_BANK];
583 unsigned nhandled = 0;
586 if (!pca953x_irq_pending(chip, pending))
589 for (i = 0; i < NBANK(chip); i++) {
591 level = __ffs(pending[i]);
592 handle_nested_irq(irq_find_mapping(chip->gpio_chip.irqdomain,
593 level + (BANK_SZ * i)));
594 pending[i] &= ~(1 << level);
599 return (nhandled > 0) ? IRQ_HANDLED : IRQ_NONE;
602 static int pca953x_irq_setup(struct pca953x_chip *chip,
605 struct i2c_client *client = chip->client;
608 if (client->irq && irq_base != -1
609 && (chip->driver_data & PCA_INT)) {
611 ret = pca953x_read_regs(chip,
612 chip->regs->input, chip->irq_stat);
617 * There is no way to know which GPIO line generated the
618 * interrupt. We have to rely on the previous read for
621 for (i = 0; i < NBANK(chip); i++)
622 chip->irq_stat[i] &= chip->reg_direction[i];
623 mutex_init(&chip->irq_lock);
625 ret = devm_request_threaded_irq(&client->dev,
629 IRQF_TRIGGER_LOW | IRQF_ONESHOT |
631 dev_name(&client->dev), chip);
633 dev_err(&client->dev, "failed to request irq %d\n",
638 ret = gpiochip_irqchip_add(&chip->gpio_chip,
644 dev_err(&client->dev,
645 "could not connect irqchip to gpiochip\n");
649 gpiochip_set_chained_irqchip(&chip->gpio_chip,
657 #else /* CONFIG_GPIO_PCA953X_IRQ */
658 static int pca953x_irq_setup(struct pca953x_chip *chip,
661 struct i2c_client *client = chip->client;
663 if (irq_base != -1 && (chip->driver_data & PCA_INT))
664 dev_warn(&client->dev, "interrupt support not compiled in\n");
670 static int device_pca953x_init(struct pca953x_chip *chip, u32 invert)
675 chip->regs = &pca953x_regs;
677 ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
681 ret = pca953x_read_regs(chip, chip->regs->direction,
682 chip->reg_direction);
686 /* set platform specific polarity inversion */
688 memset(val, 0xFF, NBANK(chip));
690 memset(val, 0, NBANK(chip));
692 ret = pca953x_write_regs(chip, PCA953X_INVERT, val);
697 static int device_pca957x_init(struct pca953x_chip *chip, u32 invert)
702 chip->regs = &pca957x_regs;
704 ret = pca953x_read_regs(chip, chip->regs->output, chip->reg_output);
707 ret = pca953x_read_regs(chip, chip->regs->direction,
708 chip->reg_direction);
712 /* set platform specific polarity inversion */
714 memset(val, 0xFF, NBANK(chip));
716 memset(val, 0, NBANK(chip));
717 ret = pca953x_write_regs(chip, PCA957X_INVRT, val);
721 /* To enable register 6, 7 to control pull up and pull down */
722 memset(val, 0x02, NBANK(chip));
723 ret = pca953x_write_regs(chip, PCA957X_BKEN, val);
732 static const struct of_device_id pca953x_dt_ids[];
734 static int pca953x_probe(struct i2c_client *client,
735 const struct i2c_device_id *id)
737 struct pca953x_platform_data *pdata;
738 struct pca953x_chip *chip;
742 struct regulator *reg;
744 chip = devm_kzalloc(&client->dev,
745 sizeof(struct pca953x_chip), GFP_KERNEL);
749 pdata = dev_get_platdata(&client->dev);
751 irq_base = pdata->irq_base;
752 chip->gpio_start = pdata->gpio_base;
753 invert = pdata->invert;
754 chip->names = pdata->names;
756 chip->gpio_start = -1;
760 chip->client = client;
762 reg = devm_regulator_get(&client->dev, "vcc");
765 if (ret != -EPROBE_DEFER)
766 dev_err(&client->dev, "reg get err: %d\n", ret);
769 ret = regulator_enable(reg);
771 dev_err(&client->dev, "reg en err: %d\n", ret);
774 chip->regulator = reg;
777 chip->driver_data = id->driver_data;
779 const struct acpi_device_id *id;
780 const struct of_device_id *match;
782 match = of_match_device(pca953x_dt_ids, &client->dev);
784 chip->driver_data = (int)(uintptr_t)match->data;
786 id = acpi_match_device(pca953x_acpi_ids, &client->dev);
792 chip->driver_data = id->driver_data;
796 mutex_init(&chip->i2c_lock);
798 /* initialize cached registers from their original values.
799 * we can't share this chip with another i2c master.
801 pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
803 if (chip->gpio_chip.ngpio <= 8) {
804 chip->write_regs = pca953x_write_regs_8;
805 chip->read_regs = pca953x_read_regs_8;
806 } else if (chip->gpio_chip.ngpio >= 24) {
807 chip->write_regs = pca953x_write_regs_24;
808 chip->read_regs = pca953x_read_regs_24;
810 if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
811 chip->write_regs = pca953x_write_regs_16;
813 chip->write_regs = pca957x_write_regs_16;
814 chip->read_regs = pca953x_read_regs_16;
817 if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE)
818 ret = device_pca953x_init(chip, invert);
820 ret = device_pca957x_init(chip, invert);
824 ret = devm_gpiochip_add_data(&client->dev, &chip->gpio_chip, chip);
828 ret = pca953x_irq_setup(chip, irq_base);
832 if (pdata && pdata->setup) {
833 ret = pdata->setup(client, chip->gpio_chip.base,
834 chip->gpio_chip.ngpio, pdata->context);
836 dev_warn(&client->dev, "setup failed, %d\n", ret);
839 i2c_set_clientdata(client, chip);
843 regulator_disable(chip->regulator);
847 static int pca953x_remove(struct i2c_client *client)
849 struct pca953x_platform_data *pdata = dev_get_platdata(&client->dev);
850 struct pca953x_chip *chip = i2c_get_clientdata(client);
853 if (pdata && pdata->teardown) {
854 ret = pdata->teardown(client, chip->gpio_chip.base,
855 chip->gpio_chip.ngpio, pdata->context);
857 dev_err(&client->dev, "%s failed, %d\n",
863 regulator_disable(chip->regulator);
868 /* convenience to stop overlong match-table lines */
869 #define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int)
870 #define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int)
872 static const struct of_device_id pca953x_dt_ids[] = {
873 { .compatible = "nxp,pca9505", .data = OF_953X(40, PCA_INT), },
874 { .compatible = "nxp,pca9534", .data = OF_953X( 8, PCA_INT), },
875 { .compatible = "nxp,pca9535", .data = OF_953X(16, PCA_INT), },
876 { .compatible = "nxp,pca9536", .data = OF_953X( 4, 0), },
877 { .compatible = "nxp,pca9537", .data = OF_953X( 4, PCA_INT), },
878 { .compatible = "nxp,pca9538", .data = OF_953X( 8, PCA_INT), },
879 { .compatible = "nxp,pca9539", .data = OF_953X(16, PCA_INT), },
880 { .compatible = "nxp,pca9554", .data = OF_953X( 8, PCA_INT), },
881 { .compatible = "nxp,pca9555", .data = OF_953X(16, PCA_INT), },
882 { .compatible = "nxp,pca9556", .data = OF_953X( 8, 0), },
883 { .compatible = "nxp,pca9557", .data = OF_953X( 8, 0), },
884 { .compatible = "nxp,pca9574", .data = OF_957X( 8, PCA_INT), },
885 { .compatible = "nxp,pca9575", .data = OF_957X(16, PCA_INT), },
886 { .compatible = "nxp,pca9698", .data = OF_953X(40, 0), },
888 { .compatible = "maxim,max7310", .data = OF_953X( 8, 0), },
889 { .compatible = "maxim,max7312", .data = OF_953X(16, PCA_INT), },
890 { .compatible = "maxim,max7313", .data = OF_953X(16, PCA_INT), },
891 { .compatible = "maxim,max7315", .data = OF_953X( 8, PCA_INT), },
893 { .compatible = "ti,pca6107", .data = OF_953X( 8, PCA_INT), },
894 { .compatible = "ti,pca9536", .data = OF_953X( 4, 0), },
895 { .compatible = "ti,tca6408", .data = OF_953X( 8, PCA_INT), },
896 { .compatible = "ti,tca6416", .data = OF_953X(16, PCA_INT), },
897 { .compatible = "ti,tca6424", .data = OF_953X(24, PCA_INT), },
899 { .compatible = "onsemi,pca9654", .data = OF_953X( 8, PCA_INT), },
901 { .compatible = "exar,xra1202", .data = OF_953X( 8, 0), },
905 MODULE_DEVICE_TABLE(of, pca953x_dt_ids);
907 static struct i2c_driver pca953x_driver = {
910 .of_match_table = pca953x_dt_ids,
911 .acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
913 .probe = pca953x_probe,
914 .remove = pca953x_remove,
915 .id_table = pca953x_id,
918 static int __init pca953x_init(void)
920 return i2c_add_driver(&pca953x_driver);
922 /* register after i2c postcore initcall and before
923 * subsys initcalls that may rely on these GPIOs
925 subsys_initcall(pca953x_init);
927 static void __exit pca953x_exit(void)
929 i2c_del_driver(&pca953x_driver);
931 module_exit(pca953x_exit);
933 MODULE_AUTHOR("eric miao <eric.miao@marvell.com>");
934 MODULE_DESCRIPTION("GPIO expander driver for PCA953x");
935 MODULE_LICENSE("GPL");