[linux-2.6-block.git] / drivers / gpio / gpio-tps65910.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * TI TPS6591x GPIO driver
 *
 * Copyright 2010 Texas Instruments Inc.
 *
 * Author: Graeme Gregory <gg@slimlogic.co.uk>
 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/gpio/driver.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/mfd/tps65910.h>
#include <linux/of.h>

struct tps65910_gpio {
	struct gpio_chip gpio_chip;
	struct tps65910 *tps65910;
};

static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
	struct tps65910 *tps65910 = tps65910_gpio->tps65910;
	unsigned int val;

	regmap_read(tps65910->regmap, TPS65910_GPIO0 + offset, &val);

	if (val & GPIO_STS_MASK)
		return 1;

	return 0;
}

static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
			      int value)
{
	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
	struct tps65910 *tps65910 = tps65910_gpio->tps65910;

	if (value)
		regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
						GPIO_SET_MASK);
	else
		regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
						GPIO_SET_MASK);
}

static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
	struct tps65910 *tps65910 = tps65910_gpio->tps65910;

	/* Set the initial value */
	tps65910_gpio_set(gc, offset, value);

	return regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
						GPIO_CFG_MASK);
}

static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
{
	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
	struct tps65910 *tps65910 = tps65910_gpio->tps65910;

	return regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
						GPIO_CFG_MASK);
}

#ifdef CONFIG_OF
static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,
		struct tps65910 *tps65910, int chip_ngpio)
{
	struct tps65910_board *tps65910_board = tps65910->of_plat_data;
	unsigned int prop_array[TPS6591X_MAX_NUM_GPIO];
	int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO);
	int ret;
	int idx;

	tps65910_board->gpio_base = -1;
	ret = of_property_read_u32_array(tps65910->dev->of_node,
			"ti,en-gpio-sleep", prop_array, ngpio);
	if (ret < 0) {
		dev_dbg(dev, "ti,en-gpio-sleep not specified\n");
		return tps65910_board;
	}

	for (idx = 0; idx < ngpio; idx++)
		tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0);

	return tps65910_board;
}
#else
static struct tps65910_board *tps65910_parse_dt_for_gpio(struct device *dev,
		struct tps65910 *tps65910, int chip_ngpio)
{
	return NULL;
}
#endif

static int tps65910_gpio_probe(struct platform_device *pdev)
{
	struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
	struct tps65910_board *pdata = dev_get_platdata(tps65910->dev);
	struct tps65910_gpio *tps65910_gpio;
	int ret;
	int i;

	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));

	tps65910_gpio = devm_kzalloc(&pdev->dev,
				sizeof(*tps65910_gpio), GFP_KERNEL);
	if (!tps65910_gpio)
		return -ENOMEM;

	tps65910_gpio->tps65910 = tps65910;

	tps65910_gpio->gpio_chip.owner = THIS_MODULE;
	tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;

	switch (tps65910_chip_id(tps65910)) {
	case TPS65910:
		tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;
		break;
	case TPS65911:
		tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO;
		break;
	default:
		return -EINVAL;
	}
	tps65910_gpio->gpio_chip.can_sleep = true;
	tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input;
	tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output;
	tps65910_gpio->gpio_chip.set	= tps65910_gpio_set;
	tps65910_gpio->gpio_chip.get	= tps65910_gpio_get;
	tps65910_gpio->gpio_chip.parent = &pdev->dev;

	if (pdata && pdata->gpio_base)
		tps65910_gpio->gpio_chip.base = pdata->gpio_base;
	else
		tps65910_gpio->gpio_chip.base = -1;

	if (!pdata && tps65910->dev->of_node)
		pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910,
			tps65910_gpio->gpio_chip.ngpio);

	if (!pdata)
		goto skip_init;

	/* Configure sleep control for gpios if provided */
	for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) {
		if (!pdata->en_gpio_sleep[i])
			continue;

		ret = regmap_set_bits(tps65910->regmap,
			TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
		if (ret < 0)
			dev_warn(tps65910->dev,
				"GPIO Sleep setting failed with err %d\n", ret);
	}

skip_init:
	return devm_gpiochip_add_data(&pdev->dev, &tps65910_gpio->gpio_chip,
				      tps65910_gpio);
}

static struct platform_driver tps65910_gpio_driver = {
	.driver.name    = "tps65910-gpio",
	.probe		= tps65910_gpio_probe,
};

static int __init tps65910_gpio_init(void)
{
	return platform_driver_register(&tps65910_gpio_driver);
}
subsys_initcall(tps65910_gpio_init);
Commit	Line	Data
d5a4da15	1	// SPDX-License-Identifier: GPL-2.0+
2537df72	2	/*
c103de24	3	* TI TPS6591x GPIO driver
2537df72 GG	4	*
	5	* Copyright 2010 Texas Instruments Inc.
	6	*
	7	* Author: Graeme Gregory <gg@slimlogic.co.uk>
02c7a13e	8	* Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
2537df72 GG	9	*/
	10
	11	#include <linux/kernel.h>
02c7a13e	12	#include <linux/init.h>
2537df72	13	#include <linux/errno.h>
5d75683e	14	#include <linux/gpio/driver.h>
2537df72	15	#include <linux/i2c.h>
10bbc48d	16	#include <linux/platform_device.h>
2537df72	17	#include <linux/mfd/tps65910.h>
e91d0f05	18	#include <linux/of.h>
2537df72	19
10bbc48d LD	20	struct tps65910_gpio {
	21	struct gpio_chip gpio_chip;
	22	struct tps65910 *tps65910;
	23	};
	24
2537df72 GG	25	static int tps65910_gpio_get(struct gpio_chip *gc, unsigned offset)
2537df72 GG	26	{
b7c17b1b	27	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
10bbc48d	28	struct tps65910 *tps65910 = tps65910_gpio->tps65910;
3f7e8275	29	unsigned int val;
2537df72	30
a233d4eb	31	regmap_read(tps65910->regmap, TPS65910_GPIO0 + offset, &val);
2537df72	32
11ad14f8	33	if (val & GPIO_STS_MASK)
2537df72 GG	34	return 1;
	35
	36	return 0;
	37	}
	38
	39	static void tps65910_gpio_set(struct gpio_chip *gc, unsigned offset,
	40	int value)
	41	{
b7c17b1b	42	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
10bbc48d	43	struct tps65910 *tps65910 = tps65910_gpio->tps65910;
2537df72 GG	44
2537df72 GG	45	if (value)
a233d4eb	46	regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
11ad14f8	47	GPIO_SET_MASK);
2537df72	48	else
a233d4eb	49	regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
11ad14f8	50	GPIO_SET_MASK);
2537df72 GG	51	}
	52
	53	static int tps65910_gpio_output(struct gpio_chip *gc, unsigned offset,
	54	int value)
	55	{
b7c17b1b	56	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
10bbc48d	57	struct tps65910 *tps65910 = tps65910_gpio->tps65910;
2537df72 GG	58
2537df72 GG	59	/* Set the initial value */
94bd2442	60	tps65910_gpio_set(gc, offset, value);
2537df72	61
a233d4eb	62	return regmap_set_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
11ad14f8	63	GPIO_CFG_MASK);
2537df72 GG	64	}
	65
	66	static int tps65910_gpio_input(struct gpio_chip *gc, unsigned offset)
	67	{
b7c17b1b	68	struct tps65910_gpio *tps65910_gpio = gpiochip_get_data(gc);
10bbc48d	69	struct tps65910 *tps65910 = tps65910_gpio->tps65910;
2537df72	70
a233d4eb	71	return regmap_clear_bits(tps65910->regmap, TPS65910_GPIO0 + offset,
11ad14f8	72	GPIO_CFG_MASK);
2537df72 GG	73	}
2537df72 GG	74
6fe02e9f LD	75	#ifdef CONFIG_OF
	76	static struct tps65910_board tps65910_parse_dt_for_gpio(struct device dev,
	77	struct tps65910 *tps65910, int chip_ngpio)
	78	{
	79	struct tps65910_board *tps65910_board = tps65910->of_plat_data;
	80	unsigned int prop_array[TPS6591X_MAX_NUM_GPIO];
	81	int ngpio = min(chip_ngpio, TPS6591X_MAX_NUM_GPIO);
	82	int ret;
	83	int idx;
	84
	85	tps65910_board->gpio_base = -1;
	86	ret = of_property_read_u32_array(tps65910->dev->of_node,
	87	"ti,en-gpio-sleep", prop_array, ngpio);
	88	if (ret < 0) {
	89	dev_dbg(dev, "ti,en-gpio-sleep not specified\n");
	90	return tps65910_board;
	91	}
	92
	93	for (idx = 0; idx < ngpio; idx++)
	94	tps65910_board->en_gpio_sleep[idx] = (prop_array[idx] != 0);
	95
	96	return tps65910_board;
	97	}
	98	#else
	99	static struct tps65910_board tps65910_parse_dt_for_gpio(struct device dev,
	100	struct tps65910 *tps65910, int chip_ngpio)
	101	{
	102	return NULL;
	103	}
	104	#endif
	105
3836309d	106	static int tps65910_gpio_probe(struct platform_device *pdev)
2537df72	107	{
10bbc48d LD	108	struct tps65910 *tps65910 = dev_get_drvdata(pdev->dev.parent);
	109	struct tps65910_board *pdata = dev_get_platdata(tps65910->dev);
	110	struct tps65910_gpio *tps65910_gpio;
2537df72	111	int ret;
10bbc48d LD	112	int i;
10bbc48d LD	113
6dbe6c07 AS	114	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));
6dbe6c07 AS	115
10bbc48d LD	116	tps65910_gpio = devm_kzalloc(&pdev->dev,
10bbc48d LD	117	sizeof(*tps65910_gpio), GFP_KERNEL);
0661175a	118	if (!tps65910_gpio)
10bbc48d	119	return -ENOMEM;
2537df72	120
10bbc48d	121	tps65910_gpio->tps65910 = tps65910;
2537df72	122
10bbc48d LD	123	tps65910_gpio->gpio_chip.owner = THIS_MODULE;
10bbc48d LD	124	tps65910_gpio->gpio_chip.label = tps65910->i2c_client->name;
11ad14f8	125
195c65e8	126	switch (tps65910_chip_id(tps65910)) {
11ad14f8	127	case TPS65910:
10bbc48d	128	tps65910_gpio->gpio_chip.ngpio = TPS65910_NUM_GPIO;
58956ba2	129	break;
11ad14f8	130	case TPS65911:
10bbc48d	131	tps65910_gpio->gpio_chip.ngpio = TPS65911_NUM_GPIO;
58956ba2	132	break;
11ad14f8	133	default:
10bbc48d	134	return -EINVAL;
11ad14f8	135	}
9fb1f39e	136	tps65910_gpio->gpio_chip.can_sleep = true;
10bbc48d LD	137	tps65910_gpio->gpio_chip.direction_input = tps65910_gpio_input;
	138	tps65910_gpio->gpio_chip.direction_output = tps65910_gpio_output;
	139	tps65910_gpio->gpio_chip.set = tps65910_gpio_set;
	140	tps65910_gpio->gpio_chip.get = tps65910_gpio_get;
58383c78	141	tps65910_gpio->gpio_chip.parent = &pdev->dev;
6dbe6c07	142
10bbc48d LD	143	if (pdata && pdata->gpio_base)
	144	tps65910_gpio->gpio_chip.base = pdata->gpio_base;
	145	else
	146	tps65910_gpio->gpio_chip.base = -1;
	147
6fe02e9f LD	148	if (!pdata && tps65910->dev->of_node)
	149	pdata = tps65910_parse_dt_for_gpio(&pdev->dev, tps65910,
	150	tps65910_gpio->gpio_chip.ngpio);
	151
10bbc48d LD	152	if (!pdata)
	153	goto skip_init;
	154
	155	/* Configure sleep control for gpios if provided */
	156	for (i = 0; i < tps65910_gpio->gpio_chip.ngpio; ++i) {
	157	if (!pdata->en_gpio_sleep[i])
	158	continue;
	159
a233d4eb	160	ret = regmap_set_bits(tps65910->regmap,
10bbc48d LD	161	TPS65910_GPIO0 + i, GPIO_SLEEP_MASK);
	162	if (ret < 0)
	163	dev_warn(tps65910->dev,
	164	"GPIO Sleep setting failed with err %d\n", ret);
	165	}
	166
	167	skip_init:
96a03e86 AA	168	return devm_gpiochip_add_data(&pdev->dev, &tps65910_gpio->gpio_chip,
96a03e86 AA	169	tps65910_gpio);
2537df72	170	}
10bbc48d	171
10bbc48d LD	172	static struct platform_driver tps65910_gpio_driver = {
10bbc48d LD	173	.driver.name = "tps65910-gpio",
10bbc48d	174	.probe = tps65910_gpio_probe,
10bbc48d LD	175	};
	176
	177	static int __init tps65910_gpio_init(void)
	178	{
	179	return platform_driver_register(&tps65910_gpio_driver);
	180	}
	181	subsys_initcall(tps65910_gpio_init);