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>
25 #define PCA953X_INPUT 0
26 #define PCA953X_OUTPUT 1
27 #define PCA953X_INVERT 2
28 #define PCA953X_DIRECTION 3
30 #define REG_ADDR_AI 0x80
33 #define PCA957X_INVRT 1
34 #define PCA957X_BKEN 2
35 #define PCA957X_PUPD 3
39 #define PCA957X_INTS 7
41 #define PCA_GPIO_MASK 0x00FF
42 #define PCA_INT 0x0100
43 #define PCA953X_TYPE 0x1000
44 #define PCA957X_TYPE 0x2000
45 #define PCA_TYPE_MASK 0xF000
47 #define PCA_CHIP_TYPE(x) ((x) & PCA_TYPE_MASK)
49 static const struct i2c_device_id pca953x_id
[] = {
50 { "pca9505", 40 | PCA953X_TYPE
| PCA_INT
, },
51 { "pca9534", 8 | PCA953X_TYPE
| PCA_INT
, },
52 { "pca9535", 16 | PCA953X_TYPE
| PCA_INT
, },
53 { "pca9536", 4 | PCA953X_TYPE
, },
54 { "pca9537", 4 | PCA953X_TYPE
| PCA_INT
, },
55 { "pca9538", 8 | PCA953X_TYPE
| PCA_INT
, },
56 { "pca9539", 16 | PCA953X_TYPE
| PCA_INT
, },
57 { "pca9554", 8 | PCA953X_TYPE
| PCA_INT
, },
58 { "pca9555", 16 | PCA953X_TYPE
| PCA_INT
, },
59 { "pca9556", 8 | PCA953X_TYPE
, },
60 { "pca9557", 8 | PCA953X_TYPE
, },
61 { "pca9574", 8 | PCA957X_TYPE
| PCA_INT
, },
62 { "pca9575", 16 | PCA957X_TYPE
| PCA_INT
, },
63 { "pca9698", 40 | PCA953X_TYPE
, },
65 { "max7310", 8 | PCA953X_TYPE
, },
66 { "max7312", 16 | PCA953X_TYPE
| PCA_INT
, },
67 { "max7313", 16 | PCA953X_TYPE
| PCA_INT
, },
68 { "max7315", 8 | PCA953X_TYPE
| PCA_INT
, },
69 { "pca6107", 8 | PCA953X_TYPE
| PCA_INT
, },
70 { "tca6408", 8 | PCA953X_TYPE
| PCA_INT
, },
71 { "tca6416", 16 | PCA953X_TYPE
| PCA_INT
, },
72 { "tca6424", 24 | PCA953X_TYPE
| PCA_INT
, },
73 { "tca9539", 16 | PCA953X_TYPE
| PCA_INT
, },
74 { "xra1202", 8 | PCA953X_TYPE
},
77 MODULE_DEVICE_TABLE(i2c
, pca953x_id
);
79 static const struct acpi_device_id pca953x_acpi_ids
[] = {
80 { "INT3491", 16 | PCA953X_TYPE
| PCA_INT
, },
83 MODULE_DEVICE_TABLE(acpi
, pca953x_acpi_ids
);
88 #define NBANK(chip) (chip->gpio_chip.ngpio / BANK_SZ)
92 u8 reg_output
[MAX_BANK
];
93 u8 reg_direction
[MAX_BANK
];
94 struct mutex i2c_lock
;
96 #ifdef CONFIG_GPIO_PCA953X_IRQ
97 struct mutex irq_lock
;
98 u8 irq_mask
[MAX_BANK
];
99 u8 irq_stat
[MAX_BANK
];
100 u8 irq_trig_raise
[MAX_BANK
];
101 u8 irq_trig_fall
[MAX_BANK
];
104 struct i2c_client
*client
;
105 struct gpio_chip gpio_chip
;
106 const char *const *names
;
108 unsigned long driver_data
;
111 static int pca953x_read_single(struct pca953x_chip
*chip
, int reg
, u32
*val
,
115 int bank_shift
= fls((chip
->gpio_chip
.ngpio
- 1) / BANK_SZ
);
116 int offset
= off
/ BANK_SZ
;
118 ret
= i2c_smbus_read_byte_data(chip
->client
,
119 (reg
<< bank_shift
) + offset
);
123 dev_err(&chip
->client
->dev
, "failed reading register\n");
130 static int pca953x_write_single(struct pca953x_chip
*chip
, int reg
, u32 val
,
134 int bank_shift
= fls((chip
->gpio_chip
.ngpio
- 1) / BANK_SZ
);
135 int offset
= off
/ BANK_SZ
;
137 ret
= i2c_smbus_write_byte_data(chip
->client
,
138 (reg
<< bank_shift
) + offset
, val
);
141 dev_err(&chip
->client
->dev
, "failed writing register\n");
148 static int pca953x_write_regs(struct pca953x_chip
*chip
, int reg
, u8
*val
)
152 if (chip
->gpio_chip
.ngpio
<= 8)
153 ret
= i2c_smbus_write_byte_data(chip
->client
, reg
, *val
);
154 else if (chip
->gpio_chip
.ngpio
>= 24) {
155 int bank_shift
= fls((chip
->gpio_chip
.ngpio
- 1) / BANK_SZ
);
156 ret
= i2c_smbus_write_i2c_block_data(chip
->client
,
157 (reg
<< bank_shift
) | REG_ADDR_AI
,
160 switch (chip
->chip_type
) {
162 ret
= i2c_smbus_write_word_data(chip
->client
,
163 reg
<< 1, cpu_to_le16(get_unaligned((u16
*)val
)));
166 ret
= i2c_smbus_write_byte_data(chip
->client
, reg
<< 1,
170 ret
= i2c_smbus_write_byte_data(chip
->client
,
178 dev_err(&chip
->client
->dev
, "failed writing register\n");
185 static int pca953x_read_regs(struct pca953x_chip
*chip
, int reg
, u8
*val
)
189 if (chip
->gpio_chip
.ngpio
<= 8) {
190 ret
= i2c_smbus_read_byte_data(chip
->client
, reg
);
192 } else if (chip
->gpio_chip
.ngpio
>= 24) {
193 int bank_shift
= fls((chip
->gpio_chip
.ngpio
- 1) / BANK_SZ
);
195 ret
= i2c_smbus_read_i2c_block_data(chip
->client
,
196 (reg
<< bank_shift
) | REG_ADDR_AI
,
199 ret
= i2c_smbus_read_word_data(chip
->client
, reg
<< 1);
200 val
[0] = (u16
)ret
& 0xFF;
201 val
[1] = (u16
)ret
>> 8;
204 dev_err(&chip
->client
->dev
, "failed reading register\n");
211 static int pca953x_gpio_direction_input(struct gpio_chip
*gc
, unsigned off
)
213 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
217 mutex_lock(&chip
->i2c_lock
);
218 reg_val
= chip
->reg_direction
[off
/ BANK_SZ
] | (1u << (off
% BANK_SZ
));
220 switch (chip
->chip_type
) {
222 offset
= PCA953X_DIRECTION
;
225 offset
= PCA957X_CFG
;
228 ret
= pca953x_write_single(chip
, offset
, reg_val
, off
);
232 chip
->reg_direction
[off
/ BANK_SZ
] = reg_val
;
235 mutex_unlock(&chip
->i2c_lock
);
239 static int pca953x_gpio_direction_output(struct gpio_chip
*gc
,
240 unsigned off
, int val
)
242 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
246 mutex_lock(&chip
->i2c_lock
);
247 /* set output level */
249 reg_val
= chip
->reg_output
[off
/ BANK_SZ
]
250 | (1u << (off
% BANK_SZ
));
252 reg_val
= chip
->reg_output
[off
/ BANK_SZ
]
253 & ~(1u << (off
% BANK_SZ
));
255 switch (chip
->chip_type
) {
257 offset
= PCA953X_OUTPUT
;
260 offset
= PCA957X_OUT
;
263 ret
= pca953x_write_single(chip
, offset
, reg_val
, off
);
267 chip
->reg_output
[off
/ BANK_SZ
] = reg_val
;
270 reg_val
= chip
->reg_direction
[off
/ BANK_SZ
] & ~(1u << (off
% BANK_SZ
));
271 switch (chip
->chip_type
) {
273 offset
= PCA953X_DIRECTION
;
276 offset
= PCA957X_CFG
;
279 ret
= pca953x_write_single(chip
, offset
, reg_val
, off
);
283 chip
->reg_direction
[off
/ BANK_SZ
] = reg_val
;
286 mutex_unlock(&chip
->i2c_lock
);
290 static int pca953x_gpio_get_value(struct gpio_chip
*gc
, unsigned off
)
292 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
296 mutex_lock(&chip
->i2c_lock
);
297 switch (chip
->chip_type
) {
299 offset
= PCA953X_INPUT
;
305 ret
= pca953x_read_single(chip
, offset
, ®_val
, off
);
306 mutex_unlock(&chip
->i2c_lock
);
308 /* NOTE: diagnostic already emitted; that's all we should
309 * do unless gpio_*_value_cansleep() calls become different
310 * from their nonsleeping siblings (and report faults).
315 return (reg_val
& (1u << (off
% BANK_SZ
))) ? 1 : 0;
318 static void pca953x_gpio_set_value(struct gpio_chip
*gc
, unsigned off
, int val
)
320 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
324 mutex_lock(&chip
->i2c_lock
);
326 reg_val
= chip
->reg_output
[off
/ BANK_SZ
]
327 | (1u << (off
% BANK_SZ
));
329 reg_val
= chip
->reg_output
[off
/ BANK_SZ
]
330 & ~(1u << (off
% BANK_SZ
));
332 switch (chip
->chip_type
) {
334 offset
= PCA953X_OUTPUT
;
337 offset
= PCA957X_OUT
;
340 ret
= pca953x_write_single(chip
, offset
, reg_val
, off
);
344 chip
->reg_output
[off
/ BANK_SZ
] = reg_val
;
346 mutex_unlock(&chip
->i2c_lock
);
350 static void pca953x_gpio_set_multiple(struct gpio_chip
*gc
,
351 unsigned long *mask
, unsigned long *bits
)
353 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
354 u8 reg_val
[MAX_BANK
];
356 int bank_shift
= fls((chip
->gpio_chip
.ngpio
- 1) / BANK_SZ
);
359 switch (chip
->chip_type
) {
361 offset
= PCA953X_OUTPUT
;
364 offset
= PCA957X_OUT
;
368 memcpy(reg_val
, chip
->reg_output
, NBANK(chip
));
369 mutex_lock(&chip
->i2c_lock
);
370 for(bank
=0; bank
<NBANK(chip
); bank
++) {
371 unsigned bankmask
= mask
[bank
/ sizeof(*mask
)] >>
372 ((bank
% sizeof(*mask
)) * 8);
374 unsigned bankval
= bits
[bank
/ sizeof(*bits
)] >>
375 ((bank
% sizeof(*bits
)) * 8);
376 reg_val
[bank
] = (reg_val
[bank
] & ~bankmask
) | bankval
;
379 ret
= i2c_smbus_write_i2c_block_data(chip
->client
, offset
<< bank_shift
, NBANK(chip
), reg_val
);
383 memcpy(chip
->reg_output
, reg_val
, NBANK(chip
));
385 mutex_unlock(&chip
->i2c_lock
);
388 static void pca953x_setup_gpio(struct pca953x_chip
*chip
, int gpios
)
390 struct gpio_chip
*gc
;
392 gc
= &chip
->gpio_chip
;
394 gc
->direction_input
= pca953x_gpio_direction_input
;
395 gc
->direction_output
= pca953x_gpio_direction_output
;
396 gc
->get
= pca953x_gpio_get_value
;
397 gc
->set
= pca953x_gpio_set_value
;
398 gc
->set_multiple
= pca953x_gpio_set_multiple
;
399 gc
->can_sleep
= true;
401 gc
->base
= chip
->gpio_start
;
403 gc
->label
= chip
->client
->name
;
404 gc
->parent
= &chip
->client
->dev
;
405 gc
->owner
= THIS_MODULE
;
406 gc
->names
= chip
->names
;
409 #ifdef CONFIG_GPIO_PCA953X_IRQ
410 static void pca953x_irq_mask(struct irq_data
*d
)
412 struct gpio_chip
*gc
= irq_data_get_irq_chip_data(d
);
413 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
415 chip
->irq_mask
[d
->hwirq
/ BANK_SZ
] &= ~(1 << (d
->hwirq
% BANK_SZ
));
418 static void pca953x_irq_unmask(struct irq_data
*d
)
420 struct gpio_chip
*gc
= irq_data_get_irq_chip_data(d
);
421 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
423 chip
->irq_mask
[d
->hwirq
/ BANK_SZ
] |= 1 << (d
->hwirq
% BANK_SZ
);
426 static void pca953x_irq_bus_lock(struct irq_data
*d
)
428 struct gpio_chip
*gc
= irq_data_get_irq_chip_data(d
);
429 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
431 mutex_lock(&chip
->irq_lock
);
434 static void pca953x_irq_bus_sync_unlock(struct irq_data
*d
)
436 struct gpio_chip
*gc
= irq_data_get_irq_chip_data(d
);
437 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
441 /* Look for any newly setup interrupt */
442 for (i
= 0; i
< NBANK(chip
); i
++) {
443 new_irqs
= chip
->irq_trig_fall
[i
] | chip
->irq_trig_raise
[i
];
444 new_irqs
&= ~chip
->reg_direction
[i
];
447 level
= __ffs(new_irqs
);
448 pca953x_gpio_direction_input(&chip
->gpio_chip
,
449 level
+ (BANK_SZ
* i
));
450 new_irqs
&= ~(1 << level
);
454 mutex_unlock(&chip
->irq_lock
);
457 static int pca953x_irq_set_type(struct irq_data
*d
, unsigned int type
)
459 struct gpio_chip
*gc
= irq_data_get_irq_chip_data(d
);
460 struct pca953x_chip
*chip
= gpiochip_get_data(gc
);
461 int bank_nb
= d
->hwirq
/ BANK_SZ
;
462 u8 mask
= 1 << (d
->hwirq
% BANK_SZ
);
464 if (!(type
& IRQ_TYPE_EDGE_BOTH
)) {
465 dev_err(&chip
->client
->dev
, "irq %d: unsupported type %d\n",
470 if (type
& IRQ_TYPE_EDGE_FALLING
)
471 chip
->irq_trig_fall
[bank_nb
] |= mask
;
473 chip
->irq_trig_fall
[bank_nb
] &= ~mask
;
475 if (type
& IRQ_TYPE_EDGE_RISING
)
476 chip
->irq_trig_raise
[bank_nb
] |= mask
;
478 chip
->irq_trig_raise
[bank_nb
] &= ~mask
;
483 static struct irq_chip pca953x_irq_chip
= {
485 .irq_mask
= pca953x_irq_mask
,
486 .irq_unmask
= pca953x_irq_unmask
,
487 .irq_bus_lock
= pca953x_irq_bus_lock
,
488 .irq_bus_sync_unlock
= pca953x_irq_bus_sync_unlock
,
489 .irq_set_type
= pca953x_irq_set_type
,
492 static bool pca953x_irq_pending(struct pca953x_chip
*chip
, u8
*pending
)
494 u8 cur_stat
[MAX_BANK
];
495 u8 old_stat
[MAX_BANK
];
496 bool pending_seen
= false;
497 bool trigger_seen
= false;
498 u8 trigger
[MAX_BANK
];
499 int ret
, i
, offset
= 0;
501 switch (chip
->chip_type
) {
503 offset
= PCA953X_INPUT
;
509 ret
= pca953x_read_regs(chip
, offset
, cur_stat
);
513 /* Remove output pins from the equation */
514 for (i
= 0; i
< NBANK(chip
); i
++)
515 cur_stat
[i
] &= chip
->reg_direction
[i
];
517 memcpy(old_stat
, chip
->irq_stat
, NBANK(chip
));
519 for (i
= 0; i
< NBANK(chip
); i
++) {
520 trigger
[i
] = (cur_stat
[i
] ^ old_stat
[i
]) & chip
->irq_mask
[i
];
528 memcpy(chip
->irq_stat
, cur_stat
, NBANK(chip
));
530 for (i
= 0; i
< NBANK(chip
); i
++) {
531 pending
[i
] = (old_stat
[i
] & chip
->irq_trig_fall
[i
]) |
532 (cur_stat
[i
] & chip
->irq_trig_raise
[i
]);
533 pending
[i
] &= trigger
[i
];
541 static irqreturn_t
pca953x_irq_handler(int irq
, void *devid
)
543 struct pca953x_chip
*chip
= devid
;
544 u8 pending
[MAX_BANK
];
546 unsigned nhandled
= 0;
549 if (!pca953x_irq_pending(chip
, pending
))
552 for (i
= 0; i
< NBANK(chip
); i
++) {
554 level
= __ffs(pending
[i
]);
555 handle_nested_irq(irq_find_mapping(chip
->gpio_chip
.irqdomain
,
556 level
+ (BANK_SZ
* i
)));
557 pending
[i
] &= ~(1 << level
);
562 return (nhandled
> 0) ? IRQ_HANDLED
: IRQ_NONE
;
565 static int pca953x_irq_setup(struct pca953x_chip
*chip
,
568 struct i2c_client
*client
= chip
->client
;
569 int ret
, i
, offset
= 0;
571 if (client
->irq
&& irq_base
!= -1
572 && (chip
->driver_data
& PCA_INT
)) {
574 switch (chip
->chip_type
) {
576 offset
= PCA953X_INPUT
;
582 ret
= pca953x_read_regs(chip
, offset
, chip
->irq_stat
);
587 * There is no way to know which GPIO line generated the
588 * interrupt. We have to rely on the previous read for
591 for (i
= 0; i
< NBANK(chip
); i
++)
592 chip
->irq_stat
[i
] &= chip
->reg_direction
[i
];
593 mutex_init(&chip
->irq_lock
);
595 ret
= devm_request_threaded_irq(&client
->dev
,
599 IRQF_TRIGGER_LOW
| IRQF_ONESHOT
|
601 dev_name(&client
->dev
), chip
);
603 dev_err(&client
->dev
, "failed to request irq %d\n",
608 ret
= gpiochip_irqchip_add(&chip
->gpio_chip
,
614 dev_err(&client
->dev
,
615 "could not connect irqchip to gpiochip\n");
619 gpiochip_set_chained_irqchip(&chip
->gpio_chip
,
627 #else /* CONFIG_GPIO_PCA953X_IRQ */
628 static int pca953x_irq_setup(struct pca953x_chip
*chip
,
631 struct i2c_client
*client
= chip
->client
;
633 if (irq_base
!= -1 && (chip
->driver_data
& PCA_INT
))
634 dev_warn(&client
->dev
, "interrupt support not compiled in\n");
640 static int device_pca953x_init(struct pca953x_chip
*chip
, u32 invert
)
645 ret
= pca953x_read_regs(chip
, PCA953X_OUTPUT
, chip
->reg_output
);
649 ret
= pca953x_read_regs(chip
, PCA953X_DIRECTION
,
650 chip
->reg_direction
);
654 /* set platform specific polarity inversion */
656 memset(val
, 0xFF, NBANK(chip
));
658 memset(val
, 0, NBANK(chip
));
660 ret
= pca953x_write_regs(chip
, PCA953X_INVERT
, val
);
665 static int device_pca957x_init(struct pca953x_chip
*chip
, u32 invert
)
670 ret
= pca953x_read_regs(chip
, PCA957X_OUT
, chip
->reg_output
);
673 ret
= pca953x_read_regs(chip
, PCA957X_CFG
, chip
->reg_direction
);
677 /* set platform specific polarity inversion */
679 memset(val
, 0xFF, NBANK(chip
));
681 memset(val
, 0, NBANK(chip
));
682 ret
= pca953x_write_regs(chip
, PCA957X_INVRT
, val
);
686 /* To enable register 6, 7 to control pull up and pull down */
687 memset(val
, 0x02, NBANK(chip
));
688 ret
= pca953x_write_regs(chip
, PCA957X_BKEN
, val
);
697 static const struct of_device_id pca953x_dt_ids
[];
699 static int pca953x_probe(struct i2c_client
*client
,
700 const struct i2c_device_id
*id
)
702 struct pca953x_platform_data
*pdata
;
703 struct pca953x_chip
*chip
;
708 chip
= devm_kzalloc(&client
->dev
,
709 sizeof(struct pca953x_chip
), GFP_KERNEL
);
713 pdata
= dev_get_platdata(&client
->dev
);
715 irq_base
= pdata
->irq_base
;
716 chip
->gpio_start
= pdata
->gpio_base
;
717 invert
= pdata
->invert
;
718 chip
->names
= pdata
->names
;
720 chip
->gpio_start
= -1;
724 chip
->client
= client
;
727 chip
->driver_data
= id
->driver_data
;
729 const struct acpi_device_id
*id
;
730 const struct of_device_id
*match
;
732 match
= of_match_device(pca953x_dt_ids
, &client
->dev
);
734 chip
->driver_data
= (int)(uintptr_t)match
->data
;
736 id
= acpi_match_device(pca953x_acpi_ids
, &client
->dev
);
740 chip
->driver_data
= id
->driver_data
;
744 chip
->chip_type
= PCA_CHIP_TYPE(chip
->driver_data
);
746 mutex_init(&chip
->i2c_lock
);
748 /* initialize cached registers from their original values.
749 * we can't share this chip with another i2c master.
751 pca953x_setup_gpio(chip
, chip
->driver_data
& PCA_GPIO_MASK
);
753 if (chip
->chip_type
== PCA953X_TYPE
)
754 ret
= device_pca953x_init(chip
, invert
);
756 ret
= device_pca957x_init(chip
, invert
);
760 ret
= devm_gpiochip_add_data(&client
->dev
, &chip
->gpio_chip
, chip
);
764 ret
= pca953x_irq_setup(chip
, irq_base
);
768 if (pdata
&& pdata
->setup
) {
769 ret
= pdata
->setup(client
, chip
->gpio_chip
.base
,
770 chip
->gpio_chip
.ngpio
, pdata
->context
);
772 dev_warn(&client
->dev
, "setup failed, %d\n", ret
);
775 i2c_set_clientdata(client
, chip
);
779 static int pca953x_remove(struct i2c_client
*client
)
781 struct pca953x_platform_data
*pdata
= dev_get_platdata(&client
->dev
);
782 struct pca953x_chip
*chip
= i2c_get_clientdata(client
);
785 if (pdata
&& pdata
->teardown
) {
786 ret
= pdata
->teardown(client
, chip
->gpio_chip
.base
,
787 chip
->gpio_chip
.ngpio
, pdata
->context
);
789 dev_err(&client
->dev
, "%s failed, %d\n",
798 /* convenience to stop overlong match-table lines */
799 #define OF_953X(__nrgpio, __int) (void *)(__nrgpio | PCA953X_TYPE | __int)
800 #define OF_957X(__nrgpio, __int) (void *)(__nrgpio | PCA957X_TYPE | __int)
802 static const struct of_device_id pca953x_dt_ids
[] = {
803 { .compatible
= "nxp,pca9505", .data
= OF_953X(40, PCA_INT
), },
804 { .compatible
= "nxp,pca9534", .data
= OF_953X( 8, PCA_INT
), },
805 { .compatible
= "nxp,pca9535", .data
= OF_953X(16, PCA_INT
), },
806 { .compatible
= "nxp,pca9536", .data
= OF_953X( 4, 0), },
807 { .compatible
= "nxp,pca9537", .data
= OF_953X( 4, PCA_INT
), },
808 { .compatible
= "nxp,pca9538", .data
= OF_953X( 8, PCA_INT
), },
809 { .compatible
= "nxp,pca9539", .data
= OF_953X(16, PCA_INT
), },
810 { .compatible
= "nxp,pca9554", .data
= OF_953X( 8, PCA_INT
), },
811 { .compatible
= "nxp,pca9555", .data
= OF_953X(16, PCA_INT
), },
812 { .compatible
= "nxp,pca9556", .data
= OF_953X( 8, 0), },
813 { .compatible
= "nxp,pca9557", .data
= OF_953X( 8, 0), },
814 { .compatible
= "nxp,pca9574", .data
= OF_957X( 8, PCA_INT
), },
815 { .compatible
= "nxp,pca9575", .data
= OF_957X(16, PCA_INT
), },
816 { .compatible
= "nxp,pca9698", .data
= OF_953X(40, 0), },
818 { .compatible
= "maxim,max7310", .data
= OF_953X( 8, 0), },
819 { .compatible
= "maxim,max7312", .data
= OF_953X(16, PCA_INT
), },
820 { .compatible
= "maxim,max7313", .data
= OF_953X(16, PCA_INT
), },
821 { .compatible
= "maxim,max7315", .data
= OF_953X( 8, PCA_INT
), },
823 { .compatible
= "ti,pca6107", .data
= OF_953X( 8, PCA_INT
), },
824 { .compatible
= "ti,tca6408", .data
= OF_953X( 8, PCA_INT
), },
825 { .compatible
= "ti,tca6416", .data
= OF_953X(16, PCA_INT
), },
826 { .compatible
= "ti,tca6424", .data
= OF_953X(24, PCA_INT
), },
828 { .compatible
= "onsemi,pca9654", .data
= OF_953X( 8, PCA_INT
), },
830 { .compatible
= "exar,xra1202", .data
= OF_953X( 8, 0), },
834 MODULE_DEVICE_TABLE(of
, pca953x_dt_ids
);
836 static struct i2c_driver pca953x_driver
= {
839 .of_match_table
= pca953x_dt_ids
,
840 .acpi_match_table
= ACPI_PTR(pca953x_acpi_ids
),
842 .probe
= pca953x_probe
,
843 .remove
= pca953x_remove
,
844 .id_table
= pca953x_id
,
847 static int __init
pca953x_init(void)
849 return i2c_add_driver(&pca953x_driver
);
851 /* register after i2c postcore initcall and before
852 * subsys initcalls that may rely on these GPIOs
854 subsys_initcall(pca953x_init
);
856 static void __exit
pca953x_exit(void)
858 i2c_del_driver(&pca953x_driver
);
860 module_exit(pca953x_exit
);
862 MODULE_AUTHOR("eric miao <eric.miao@marvell.com>");
863 MODULE_DESCRIPTION("GPIO expander driver for PCA953x");
864 MODULE_LICENSE("GPL");