[linux.git] / drivers / gpio / gpio-tps6586x.c

// SPDX-License-Identifier: GPL-2.0
/*
 * TI TPS6586x GPIO driver
 *
 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
 * Author: Laxman dewangan <[email protected]>
 *
 * Based on tps6586x.c
 * Copyright (c) 2010 CompuLab Ltd.
 * Mike Rapoport <[email protected]>
 */

#include <linux/errno.h>
#include <linux/gpio/driver.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mfd/tps6586x.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>

/* GPIO control registers */
#define TPS6586X_GPIOSET1	0x5d
#define TPS6586X_GPIOSET2	0x5e

struct tps6586x_gpio {
	struct gpio_chip gpio_chip;
	struct device *parent;
};

static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
	uint8_t val;
	int ret;

	ret = tps6586x_read(tps6586x_gpio->parent, TPS6586X_GPIOSET2, &val);
	if (ret)
		return ret;

	return !!(val & (1 << offset));
}

static void tps6586x_gpio_set(struct gpio_chip *gc, unsigned offset,
			      int value)
{
	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);

	tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET2,
			value << offset, 1 << offset);
}

static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
	uint8_t val, mask;

	tps6586x_gpio_set(gc, offset, value);

	val = 0x1 << (offset * 2);
	mask = 0x3 << (offset * 2);

	return tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET1,
				val, mask);
}

static int tps6586x_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);

	return tps6586x_irq_get_virq(tps6586x_gpio->parent,
				TPS6586X_INT_PLDO_0 + offset);
}

static int tps6586x_gpio_probe(struct platform_device *pdev)
{
	struct tps6586x_platform_data *pdata;
	struct tps6586x_gpio *tps6586x_gpio;
	int ret;

	pdata = dev_get_platdata(pdev->dev.parent);
	tps6586x_gpio = devm_kzalloc(&pdev->dev,
				sizeof(*tps6586x_gpio), GFP_KERNEL);
	if (!tps6586x_gpio)
		return -ENOMEM;

	tps6586x_gpio->parent = pdev->dev.parent;

	tps6586x_gpio->gpio_chip.owner = THIS_MODULE;
	tps6586x_gpio->gpio_chip.label = pdev->name;
	tps6586x_gpio->gpio_chip.parent = &pdev->dev;
	tps6586x_gpio->gpio_chip.ngpio = 4;
	tps6586x_gpio->gpio_chip.can_sleep = true;

	/* FIXME: add handling of GPIOs as dedicated inputs */
	tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output;
	tps6586x_gpio->gpio_chip.set	= tps6586x_gpio_set;
	tps6586x_gpio->gpio_chip.get	= tps6586x_gpio_get;
	tps6586x_gpio->gpio_chip.to_irq	= tps6586x_gpio_to_irq;

#ifdef CONFIG_OF_GPIO
	tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node;
#endif
	if (pdata && pdata->gpio_base)
		tps6586x_gpio->gpio_chip.base = pdata->gpio_base;
	else
		tps6586x_gpio->gpio_chip.base = -1;

	ret = devm_gpiochip_add_data(&pdev->dev, &tps6586x_gpio->gpio_chip,
				     tps6586x_gpio);
	if (ret < 0) {
		dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
		return ret;
	}

	platform_set_drvdata(pdev, tps6586x_gpio);

	return ret;
}

static struct platform_driver tps6586x_gpio_driver = {
	.driver.name	= "tps6586x-gpio",
	.probe		= tps6586x_gpio_probe,
};

static int __init tps6586x_gpio_init(void)
{
	return platform_driver_register(&tps6586x_gpio_driver);
}
subsys_initcall(tps6586x_gpio_init);
Commit	Line	Data
d5a4da15	1	// SPDX-License-Identifier: GPL-2.0
72bd9860 LD	2	/*
	3	* TI TPS6586x GPIO driver
	4	*
	5	* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
	6	* Author: Laxman dewangan <[email protected]>
	7	*
	8	* Based on tps6586x.c
	9	* Copyright (c) 2010 CompuLab Ltd.
	10	* Mike Rapoport <[email protected]>
72bd9860 LD	11	*/
	12
	13	#include <linux/errno.h>
5d75683e	14	#include <linux/gpio/driver.h>
72bd9860	15	#include <linux/kernel.h>
a0e63738	16	#include <linux/init.h>
72bd9860 LD	17	#include <linux/mfd/tps6586x.h>
	18	#include <linux/of_device.h>
	19	#include <linux/platform_device.h>
	20
	21	/* GPIO control registers */
	22	#define TPS6586X_GPIOSET1 0x5d
	23	#define TPS6586X_GPIOSET2 0x5e
	24
	25	struct tps6586x_gpio {
	26	struct gpio_chip gpio_chip;
	27	struct device *parent;
	28	};
	29
72bd9860 LD	30	static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
72bd9860 LD	31	{
94a90370	32	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
72bd9860 LD	33	uint8_t val;
	34	int ret;
	35
	36	ret = tps6586x_read(tps6586x_gpio->parent, TPS6586X_GPIOSET2, &val);
	37	if (ret)
	38	return ret;
	39
	40	return !!(val & (1 << offset));
	41	}
	42
	43	static void tps6586x_gpio_set(struct gpio_chip *gc, unsigned offset,
	44	int value)
	45	{
94a90370	46	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
72bd9860 LD	47
	48	tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET2,
	49	value << offset, 1 << offset);
	50	}
	51
	52	static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
	53	int value)
	54	{
94a90370	55	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
72bd9860 LD	56	uint8_t val, mask;
	57
	58	tps6586x_gpio_set(gc, offset, value);
	59
	60	val = 0x1 << (offset * 2);
	61	mask = 0x3 << (offset * 2);
	62
	63	return tps6586x_update(tps6586x_gpio->parent, TPS6586X_GPIOSET1,
	64	val, mask);
	65	}
	66
fe39f2f4 LD	67	static int tps6586x_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
fe39f2f4 LD	68	{
94a90370	69	struct tps6586x_gpio *tps6586x_gpio = gpiochip_get_data(gc);
fe39f2f4 LD	70
	71	return tps6586x_irq_get_virq(tps6586x_gpio->parent,
	72	TPS6586X_INT_PLDO_0 + offset);
	73	}
	74
3836309d	75	static int tps6586x_gpio_probe(struct platform_device *pdev)
72bd9860 LD	76	{
	77	struct tps6586x_platform_data *pdata;
	78	struct tps6586x_gpio *tps6586x_gpio;
	79	int ret;
	80
	81	pdata = dev_get_platdata(pdev->dev.parent);
	82	tps6586x_gpio = devm_kzalloc(&pdev->dev,
	83	sizeof(*tps6586x_gpio), GFP_KERNEL);
e1ccdb82	84	if (!tps6586x_gpio)
72bd9860	85	return -ENOMEM;
72bd9860 LD	86
	87	tps6586x_gpio->parent = pdev->dev.parent;
	88
	89	tps6586x_gpio->gpio_chip.owner = THIS_MODULE;
	90	tps6586x_gpio->gpio_chip.label = pdev->name;
58383c78	91	tps6586x_gpio->gpio_chip.parent = &pdev->dev;
72bd9860	92	tps6586x_gpio->gpio_chip.ngpio = 4;
9fb1f39e	93	tps6586x_gpio->gpio_chip.can_sleep = true;
72bd9860 LD	94
	95	/* FIXME: add handling of GPIOs as dedicated inputs */
	96	tps6586x_gpio->gpio_chip.direction_output = tps6586x_gpio_output;
	97	tps6586x_gpio->gpio_chip.set = tps6586x_gpio_set;
	98	tps6586x_gpio->gpio_chip.get = tps6586x_gpio_get;
fe39f2f4	99	tps6586x_gpio->gpio_chip.to_irq = tps6586x_gpio_to_irq;
72bd9860 LD	100
	101	#ifdef CONFIG_OF_GPIO
	102	tps6586x_gpio->gpio_chip.of_node = pdev->dev.parent->of_node;
	103	#endif
	104	if (pdata && pdata->gpio_base)
	105	tps6586x_gpio->gpio_chip.base = pdata->gpio_base;
	106	else
	107	tps6586x_gpio->gpio_chip.base = -1;
	108
79c676f8 LD	109	ret = devm_gpiochip_add_data(&pdev->dev, &tps6586x_gpio->gpio_chip,
79c676f8 LD	110	tps6586x_gpio);
72bd9860 LD	111	if (ret < 0) {
	112	dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
	113	return ret;
	114	}
	115
	116	platform_set_drvdata(pdev, tps6586x_gpio);
	117
	118	return ret;
	119	}
	120
72bd9860 LD	121	static struct platform_driver tps6586x_gpio_driver = {
72bd9860 LD	122	.driver.name = "tps6586x-gpio",
72bd9860	123	.probe = tps6586x_gpio_probe,
72bd9860 LD	124	};
	125
	126	static int __init tps6586x_gpio_init(void)
	127	{
	128	return platform_driver_register(&tps6586x_gpio_driver);
	129	}
	130	subsys_initcall(tps6586x_gpio_init);