[mirror_ubuntu-hirsute-kernel.git] / drivers / gpio / gpio-rc5t583.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * GPIO driver for RICOH583 power management chip.
 *
 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
 * Author: Laxman dewangan <ldewangan@nvidia.com>
 *
 * Based on code
 *	Copyright (C) 2011 RICOH COMPANY,LTD
 */
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/device.h>
#include <linux/gpio/driver.h>
#include <linux/mfd/rc5t583.h>

struct rc5t583_gpio {
	struct gpio_chip gpio_chip;
	struct rc5t583 *rc5t583;
};

static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset)
{
	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
	struct device *parent = rc5t583_gpio->rc5t583->dev;
	uint8_t val = 0;
	int ret;

	ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val);
	if (ret < 0)
		return ret;

	return !!(val & BIT(offset));
}

static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
{
	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
	struct device *parent = rc5t583_gpio->rc5t583->dev;
	if (val)
		rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
	else
		rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
}

static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
{
	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
	struct device *parent = rc5t583_gpio->rc5t583->dev;
	int ret;

	ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
	if (ret < 0)
		return ret;

	/* Set pin to gpio mode */
	return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
}

static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset,
			int value)
{
	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
	struct device *parent = rc5t583_gpio->rc5t583->dev;
	int ret;

	rc5t583_gpio_set(gc, offset, value);
	ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
	if (ret < 0)
		return ret;

	/* Set pin to gpio mode */
	return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
}

static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);

	if (offset < RC5T583_MAX_GPIO)
		return rc5t583_gpio->rc5t583->irq_base +
				RC5T583_IRQ_GPIO0 + offset;
	return -EINVAL;
}

static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset)
{
	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
	struct device *parent = rc5t583_gpio->rc5t583->dev;

	rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
}

static int rc5t583_gpio_probe(struct platform_device *pdev)
{
	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
	struct rc5t583_gpio *rc5t583_gpio;

	rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio),
					GFP_KERNEL);
	if (!rc5t583_gpio)
		return -ENOMEM;

	rc5t583_gpio->gpio_chip.label = "gpio-rc5t583",
	rc5t583_gpio->gpio_chip.owner = THIS_MODULE,
	rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free,
	rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input,
	rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output,
	rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set,
	rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get,
	rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq,
	rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO,
	rc5t583_gpio->gpio_chip.can_sleep = true,
	rc5t583_gpio->gpio_chip.parent = &pdev->dev;
	rc5t583_gpio->gpio_chip.base = -1;
	rc5t583_gpio->rc5t583 = rc5t583;

	if (pdata && pdata->gpio_base)
		rc5t583_gpio->gpio_chip.base = pdata->gpio_base;

	platform_set_drvdata(pdev, rc5t583_gpio);

	return devm_gpiochip_add_data(&pdev->dev, &rc5t583_gpio->gpio_chip,
				      rc5t583_gpio);
}

static struct platform_driver rc5t583_gpio_driver = {
	.driver = {
		.name    = "rc5t583-gpio",
	},
	.probe		= rc5t583_gpio_probe,
};

static int __init rc5t583_gpio_init(void)
{
	return platform_driver_register(&rc5t583_gpio_driver);
}
subsys_initcall(rc5t583_gpio_init);
Commit	Line	Data
9952f691	1	// SPDX-License-Identifier: GPL-2.0-only
e9fe32bc LD	2	/*
	3	* GPIO driver for RICOH583 power management chip.
	4	*
	5	* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
	6	* Author: Laxman dewangan <ldewangan@nvidia.com>
	7	*
	8	* Based on code
	9	* Copyright (C) 2011 RICOH COMPANY,LTD
e9fe32bc LD	10	*/
	11	#include <linux/init.h>
	12	#include <linux/kernel.h>
	13	#include <linux/slab.h>
e9fe32bc LD	14	#include <linux/platform_device.h>
e9fe32bc LD	15	#include <linux/device.h>
98aef8e7	16	#include <linux/gpio/driver.h>
e9fe32bc LD	17	#include <linux/mfd/rc5t583.h>
	18
	19	struct rc5t583_gpio {
	20	struct gpio_chip gpio_chip;
	21	struct rc5t583 *rc5t583;
	22	};
	23
e9fe32bc LD	24	static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset)
e9fe32bc LD	25	{
d660c68e	26	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
e9fe32bc LD	27	struct device *parent = rc5t583_gpio->rc5t583->dev;
	28	uint8_t val = 0;
	29	int ret;
	30
	31	ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val);
	32	if (ret < 0)
	33	return ret;
	34
	35	return !!(val & BIT(offset));
	36	}
	37
	38	static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
	39	{
d660c68e	40	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
e9fe32bc LD	41	struct device *parent = rc5t583_gpio->rc5t583->dev;
	42	if (val)
	43	rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
	44	else
	45	rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
	46	}
	47
	48	static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
	49	{
d660c68e	50	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
e9fe32bc LD	51	struct device *parent = rc5t583_gpio->rc5t583->dev;
	52	int ret;
	53
	54	ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
	55	if (ret < 0)
	56	return ret;
	57
	58	/* Set pin to gpio mode */
	59	return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
	60	}
	61
	62	static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset,
	63	int value)
	64	{
d660c68e	65	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
e9fe32bc LD	66	struct device *parent = rc5t583_gpio->rc5t583->dev;
	67	int ret;
	68
	69	rc5t583_gpio_set(gc, offset, value);
	70	ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
	71	if (ret < 0)
	72	return ret;
	73
	74	/* Set pin to gpio mode */
	75	return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
	76	}
	77
	78	static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
	79	{
d660c68e	80	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
e9fe32bc	81
3bde4d26	82	if (offset < RC5T583_MAX_GPIO)
e9fe32bc LD	83	return rc5t583_gpio->rc5t583->irq_base +
	84	RC5T583_IRQ_GPIO0 + offset;
	85	return -EINVAL;
	86	}
	87
	88	static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset)
	89	{
d660c68e	90	struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
e9fe32bc LD	91	struct device *parent = rc5t583_gpio->rc5t583->dev;
	92
	93	rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
	94	}
	95
3836309d	96	static int rc5t583_gpio_probe(struct platform_device *pdev)
e9fe32bc LD	97	{
	98	struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
	99	struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
	100	struct rc5t583_gpio *rc5t583_gpio;
	101
	102	rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio),
	103	GFP_KERNEL);
4b7dfd7f	104	if (!rc5t583_gpio)
e9fe32bc	105	return -ENOMEM;
e9fe32bc LD	106
	107	rc5t583_gpio->gpio_chip.label = "gpio-rc5t583",
	108	rc5t583_gpio->gpio_chip.owner = THIS_MODULE,
	109	rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free,
	110	rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input,
	111	rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output,
	112	rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set,
	113	rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get,
	114	rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq,
	115	rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO,
9fb1f39e	116	rc5t583_gpio->gpio_chip.can_sleep = true,
58383c78	117	rc5t583_gpio->gpio_chip.parent = &pdev->dev;
e9fe32bc LD	118	rc5t583_gpio->gpio_chip.base = -1;
	119	rc5t583_gpio->rc5t583 = rc5t583;
	120
	121	if (pdata && pdata->gpio_base)
	122	rc5t583_gpio->gpio_chip.base = pdata->gpio_base;
	123
	124	platform_set_drvdata(pdev, rc5t583_gpio);
	125
bc72f7f7 LD	126	return devm_gpiochip_add_data(&pdev->dev, &rc5t583_gpio->gpio_chip,
bc72f7f7 LD	127	rc5t583_gpio);
e9fe32bc LD	128	}
	129
	130	static struct platform_driver rc5t583_gpio_driver = {
	131	.driver = {
	132	.name = "rc5t583-gpio",
e9fe32bc LD	133	},
e9fe32bc LD	134	.probe = rc5t583_gpio_probe,
e9fe32bc LD	135	};
	136
	137	static int __init rc5t583_gpio_init(void)
	138	{
	139	return platform_driver_register(&rc5t583_gpio_driver);
	140	}
	141	subsys_initcall(rc5t583_gpio_init);