[linux-2.6-block.git] / drivers / gpio / gpio-tps65086.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
 *	Andrew F. Davis <afd@ti.com>
 *
 * Based on the TPS65912 driver
 */

#include <linux/gpio/driver.h>
#include <linux/module.h>
#include <linux/platform_device.h>

#include <linux/mfd/tps65086.h>

struct tps65086_gpio {
	struct gpio_chip chip;
	struct tps65086 *tps;
};

static int tps65086_gpio_get_direction(struct gpio_chip *chip,
				       unsigned offset)
{
	/* This device is output only */
	return 0;
}

static int tps65086_gpio_direction_input(struct gpio_chip *chip,
					 unsigned offset)
{
	/* This device is output only */
	return -EINVAL;
}

static int tps65086_gpio_direction_output(struct gpio_chip *chip,
					  unsigned offset, int value)
{
	struct tps65086_gpio *gpio = gpiochip_get_data(chip);

	/* Set the initial value */
	regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
			   BIT(4 + offset), value ? BIT(4 + offset) : 0);

	return 0;
}

static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset)
{
	struct tps65086_gpio *gpio = gpiochip_get_data(chip);
	int ret, val;

	ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val);
	if (ret < 0)
		return ret;

	return val & BIT(4 + offset);
}

static void tps65086_gpio_set(struct gpio_chip *chip, unsigned offset,
			      int value)
{
	struct tps65086_gpio *gpio = gpiochip_get_data(chip);

	regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
			   BIT(4 + offset), value ? BIT(4 + offset) : 0);
}

static const struct gpio_chip template_chip = {
	.label			= "tps65086-gpio",
	.owner			= THIS_MODULE,
	.get_direction		= tps65086_gpio_get_direction,
	.direction_input	= tps65086_gpio_direction_input,
	.direction_output	= tps65086_gpio_direction_output,
	.get			= tps65086_gpio_get,
	.set			= tps65086_gpio_set,
	.base			= -1,
	.ngpio			= 4,
	.can_sleep		= true,
};

static int tps65086_gpio_probe(struct platform_device *pdev)
{
	struct tps65086_gpio *gpio;
	int ret;

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

	platform_set_drvdata(pdev, gpio);

	gpio->tps = dev_get_drvdata(pdev->dev.parent);
	gpio->chip = template_chip;
	gpio->chip.parent = gpio->tps->dev;

	ret = gpiochip_add_data(&gpio->chip, gpio);
	if (ret < 0) {
		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
		return ret;
	}

	return 0;
}

static int tps65086_gpio_remove(struct platform_device *pdev)
{
	struct tps65086_gpio *gpio = platform_get_drvdata(pdev);

	gpiochip_remove(&gpio->chip);

	return 0;
}

static const struct platform_device_id tps65086_gpio_id_table[] = {
	{ "tps65086-gpio", },
	{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table);

static struct platform_driver tps65086_gpio_driver = {
	.driver = {
		.name = "tps65086-gpio",
	},
	.probe = tps65086_gpio_probe,
	.remove = tps65086_gpio_remove,
	.id_table = tps65086_gpio_id_table,
};
module_platform_driver(tps65086_gpio_driver);

MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
MODULE_DESCRIPTION("TPS65086 GPIO driver");
MODULE_LICENSE("GPL v2");
Commit	Line	Data
d5a4da15	1	// SPDX-License-Identifier: GPL-2.0
99f0fd54 AD	2	/*
	3	* Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
	4	* Andrew F. Davis <afd@ti.com>
	5	*
99f0fd54 AD	6	* Based on the TPS65912 driver
	7	*/
	8
5d75683e	9	#include <linux/gpio/driver.h>
99f0fd54 AD	10	#include <linux/module.h>
	11	#include <linux/platform_device.h>
	12
	13	#include <linux/mfd/tps65086.h>
	14
	15	struct tps65086_gpio {
	16	struct gpio_chip chip;
	17	struct tps65086 *tps;
	18	};
	19
	20	static int tps65086_gpio_get_direction(struct gpio_chip *chip,
	21	unsigned offset)
	22	{
	23	/* This device is output only */
	24	return 0;
	25	}
	26
	27	static int tps65086_gpio_direction_input(struct gpio_chip *chip,
	28	unsigned offset)
	29	{
	30	/* This device is output only */
	31	return -EINVAL;
	32	}
	33
	34	static int tps65086_gpio_direction_output(struct gpio_chip *chip,
	35	unsigned offset, int value)
	36	{
	37	struct tps65086_gpio *gpio = gpiochip_get_data(chip);
	38
	39	/* Set the initial value */
	40	regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
	41	BIT(4 + offset), value ? BIT(4 + offset) : 0);
	42
	43	return 0;
	44	}
	45
	46	static int tps65086_gpio_get(struct gpio_chip *chip, unsigned offset)
	47	{
	48	struct tps65086_gpio *gpio = gpiochip_get_data(chip);
	49	int ret, val;
	50
	51	ret = regmap_read(gpio->tps->regmap, TPS65086_GPOCTRL, &val);
	52	if (ret < 0)
	53	return ret;
	54
	55	return val & BIT(4 + offset);
	56	}
	57
	58	static void tps65086_gpio_set(struct gpio_chip *chip, unsigned offset,
	59	int value)
	60	{
	61	struct tps65086_gpio *gpio = gpiochip_get_data(chip);
	62
	63	regmap_update_bits(gpio->tps->regmap, TPS65086_GPOCTRL,
	64	BIT(4 + offset), value ? BIT(4 + offset) : 0);
	65	}
	66
e35b5ab0	67	static const struct gpio_chip template_chip = {
99f0fd54 AD	68	.label = "tps65086-gpio",
	69	.owner = THIS_MODULE,
	70	.get_direction = tps65086_gpio_get_direction,
	71	.direction_input = tps65086_gpio_direction_input,
	72	.direction_output = tps65086_gpio_direction_output,
	73	.get = tps65086_gpio_get,
	74	.set = tps65086_gpio_set,
	75	.base = -1,
	76	.ngpio = 4,
	77	.can_sleep = true,
	78	};
	79
	80	static int tps65086_gpio_probe(struct platform_device *pdev)
	81	{
	82	struct tps65086_gpio *gpio;
	83	int ret;
	84
	85	gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
	86	if (!gpio)
	87	return -ENOMEM;
	88
	89	platform_set_drvdata(pdev, gpio);
	90
	91	gpio->tps = dev_get_drvdata(pdev->dev.parent);
	92	gpio->chip = template_chip;
	93	gpio->chip.parent = gpio->tps->dev;
	94
	95	ret = gpiochip_add_data(&gpio->chip, gpio);
	96	if (ret < 0) {
	97	dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
	98	return ret;
	99	}
	100
	101	return 0;
	102	}
	103
	104	static int tps65086_gpio_remove(struct platform_device *pdev)
	105	{
	106	struct tps65086_gpio *gpio = platform_get_drvdata(pdev);
	107
	108	gpiochip_remove(&gpio->chip);
	109
	110	return 0;
	111	}
	112
	113	static const struct platform_device_id tps65086_gpio_id_table[] = {
	114	{ "tps65086-gpio", },
	115	{ /* sentinel */ }
	116	};
	117	MODULE_DEVICE_TABLE(platform, tps65086_gpio_id_table);
	118
	119	static struct platform_driver tps65086_gpio_driver = {
	120	.driver = {
	121	.name = "tps65086-gpio",
	122	},
	123	.probe = tps65086_gpio_probe,
	124	.remove = tps65086_gpio_remove,
	125	.id_table = tps65086_gpio_id_table,
	126	};
	127	module_platform_driver(tps65086_gpio_driver);
	128
	129	MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
	130	MODULE_DESCRIPTION("TPS65086 GPIO driver");
	131	MODULE_LICENSE("GPL v2");