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

// SPDX-License-Identifier: GPL-2.0-only
/*
 * TI Palma series PMIC's GPIO driver.
 *
 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.
 *
 * Author: Laxman Dewangan <ldewangan@nvidia.com>
 */

#include <linux/gpio/driver.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/mfd/palmas.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>

struct palmas_gpio {
	struct gpio_chip gpio_chip;
	struct palmas *palmas;
};

struct palmas_device_data {
	int ngpio;
};

static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset)
{
	struct palmas_gpio *pg = gpiochip_get_data(gc);
	struct palmas *palmas = pg->palmas;
	unsigned int val;
	int ret;
	unsigned int reg;
	int gpio16 = (offset/8);

	offset %= 8;
	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;

	ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
	if (ret < 0) {
		dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
		return ret;
	}

	if (val & BIT(offset))
		reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT;
	else
		reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN;

	ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
	if (ret < 0) {
		dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
		return ret;
	}
	return !!(val & BIT(offset));
}

static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset,
			int value)
{
	struct palmas_gpio *pg = gpiochip_get_data(gc);
	struct palmas *palmas = pg->palmas;
	int ret;
	unsigned int reg;
	int gpio16 = (offset/8);

	offset %= 8;
	if (gpio16)
		reg = (value) ?
			PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2;
	else
		reg = (value) ?
			PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT;

	ret = palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset));
	if (ret < 0)
		dev_err(gc->parent, "Reg 0x%02x write failed, %d\n", reg, ret);
}

static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset,
				int value)
{
	struct palmas_gpio *pg = gpiochip_get_data(gc);
	struct palmas *palmas = pg->palmas;
	int ret;
	unsigned int reg;
	int gpio16 = (offset/8);

	offset %= 8;
	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;

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

	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg,
				BIT(offset), BIT(offset));
	if (ret < 0)
		dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
			ret);
	return ret;
}

static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset)
{
	struct palmas_gpio *pg = gpiochip_get_data(gc);
	struct palmas *palmas = pg->palmas;
	int ret;
	unsigned int reg;
	int gpio16 = (offset/8);

	offset %= 8;
	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;

	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0);
	if (ret < 0)
		dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
			ret);
	return ret;
}

static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
{
	struct palmas_gpio *pg = gpiochip_get_data(gc);
	struct palmas *palmas = pg->palmas;

	return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset);
}

static const struct palmas_device_data palmas_dev_data = {
	.ngpio = 8,
};

static const struct palmas_device_data tps80036_dev_data = {
	.ngpio = 16,
};

static const struct of_device_id of_palmas_gpio_match[] = {
	{ .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,},
	{ .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,},
	{ .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,},
	{ .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,},
	{ },
};

static int palmas_gpio_probe(struct platform_device *pdev)
{
	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
	struct palmas_platform_data *palmas_pdata;
	struct palmas_gpio *palmas_gpio;
	int ret;
	const struct palmas_device_data *dev_data;

	dev_data = of_device_get_match_data(&pdev->dev);
	if (!dev_data)
		dev_data = &palmas_dev_data;

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

	palmas_gpio->palmas = palmas;
	palmas_gpio->gpio_chip.owner = THIS_MODULE;
	palmas_gpio->gpio_chip.label = dev_name(&pdev->dev);
	palmas_gpio->gpio_chip.ngpio = dev_data->ngpio;
	palmas_gpio->gpio_chip.can_sleep = true;
	palmas_gpio->gpio_chip.direction_input = palmas_gpio_input;
	palmas_gpio->gpio_chip.direction_output = palmas_gpio_output;
	palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq;
	palmas_gpio->gpio_chip.set	= palmas_gpio_set;
	palmas_gpio->gpio_chip.get	= palmas_gpio_get;
	palmas_gpio->gpio_chip.parent = &pdev->dev;
#ifdef CONFIG_OF_GPIO
	palmas_gpio->gpio_chip.of_node = pdev->dev.of_node;
#endif
	palmas_pdata = dev_get_platdata(palmas->dev);
	if (palmas_pdata && palmas_pdata->gpio_base)
		palmas_gpio->gpio_chip.base = palmas_pdata->gpio_base;
	else
		palmas_gpio->gpio_chip.base = -1;

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

	platform_set_drvdata(pdev, palmas_gpio);
	return ret;
}

static struct platform_driver palmas_gpio_driver = {
	.driver.name	= "palmas-gpio",
	.driver.of_match_table = of_palmas_gpio_match,
	.probe		= palmas_gpio_probe,
};

static int __init palmas_gpio_init(void)
{
	return platform_driver_register(&palmas_gpio_driver);
}
subsys_initcall(palmas_gpio_init);
Commit	Line	Data
9952f691	1	// SPDX-License-Identifier: GPL-2.0-only
3d50a278 LD	2	/*
	3	* TI Palma series PMIC's GPIO driver.
	4	*
	5	* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
	6	*
	7	* Author: Laxman Dewangan <ldewangan@nvidia.com>
3d50a278 LD	8	*/
3d50a278 LD	9
b11a0b3e	10	#include <linux/gpio/driver.h>
3d50a278	11	#include <linux/kernel.h>
f9f2b5cb	12	#include <linux/init.h>
3d50a278 LD	13	#include <linux/mfd/palmas.h>
	14	#include <linux/of.h>
	15	#include <linux/of_device.h>
	16	#include <linux/platform_device.h>
	17
	18	struct palmas_gpio {
	19	struct gpio_chip gpio_chip;
	20	struct palmas *palmas;
	21	};
	22
ca6af7b9 LD	23	struct palmas_device_data {
	24	int ngpio;
	25	};
	26
3d50a278 LD	27	static int palmas_gpio_get(struct gpio_chip *gc, unsigned offset)
3d50a278 LD	28	{
5b68cc2d	29	struct palmas_gpio *pg = gpiochip_get_data(gc);
3d50a278 LD	30	struct palmas *palmas = pg->palmas;
	31	unsigned int val;
	32	int ret;
ca6af7b9 LD	33	unsigned int reg;
	34	int gpio16 = (offset/8);
	35
	36	offset %= 8;
	37	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
3d50a278	38
ca6af7b9	39	ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
3d50a278	40	if (ret < 0) {
58383c78	41	dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
8b628c65 AC	42	return ret;
	43	}
	44
ca6af7b9 LD	45	if (val & BIT(offset))
	46	reg = (gpio16) ? PALMAS_GPIO_DATA_OUT2 : PALMAS_GPIO_DATA_OUT;
	47	else
	48	reg = (gpio16) ? PALMAS_GPIO_DATA_IN2 : PALMAS_GPIO_DATA_IN;
	49
	50	ret = palmas_read(palmas, PALMAS_GPIO_BASE, reg, &val);
8b628c65	51	if (ret < 0) {
58383c78	52	dev_err(gc->parent, "Reg 0x%02x read failed, %d\n", reg, ret);
3d50a278 LD	53	return ret;
	54	}
	55	return !!(val & BIT(offset));
	56	}
	57
	58	static void palmas_gpio_set(struct gpio_chip *gc, unsigned offset,
	59	int value)
	60	{
5b68cc2d	61	struct palmas_gpio *pg = gpiochip_get_data(gc);
3d50a278 LD	62	struct palmas *palmas = pg->palmas;
3d50a278 LD	63	int ret;
ca6af7b9 LD	64	unsigned int reg;
ca6af7b9 LD	65	int gpio16 = (offset/8);
3d50a278	66
ca6af7b9 LD	67	offset %= 8;
	68	if (gpio16)
	69	reg = (value) ?
	70	PALMAS_GPIO_SET_DATA_OUT2 : PALMAS_GPIO_CLEAR_DATA_OUT2;
3d50a278	71	else
ca6af7b9 LD	72	reg = (value) ?
	73	PALMAS_GPIO_SET_DATA_OUT : PALMAS_GPIO_CLEAR_DATA_OUT;
	74
	75	ret = palmas_write(palmas, PALMAS_GPIO_BASE, reg, BIT(offset));
3d50a278	76	if (ret < 0)
58383c78	77	dev_err(gc->parent, "Reg 0x%02x write failed, %d\n", reg, ret);
3d50a278 LD	78	}
	79
	80	static int palmas_gpio_output(struct gpio_chip *gc, unsigned offset,
	81	int value)
	82	{
5b68cc2d	83	struct palmas_gpio *pg = gpiochip_get_data(gc);
3d50a278 LD	84	struct palmas *palmas = pg->palmas;
3d50a278 LD	85	int ret;
ca6af7b9 LD	86	unsigned int reg;
	87	int gpio16 = (offset/8);
	88
	89	offset %= 8;
	90	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
3d50a278 LD	91
	92	/* Set the initial value */
	93	palmas_gpio_set(gc, offset, value);
	94
ca6af7b9 LD	95	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg,
ca6af7b9 LD	96	BIT(offset), BIT(offset));
3d50a278	97	if (ret < 0)
58383c78 LW	98	dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
58383c78 LW	99	ret);
3d50a278 LD	100	return ret;
	101	}
	102
	103	static int palmas_gpio_input(struct gpio_chip *gc, unsigned offset)
	104	{
5b68cc2d	105	struct palmas_gpio *pg = gpiochip_get_data(gc);
3d50a278 LD	106	struct palmas *palmas = pg->palmas;
3d50a278 LD	107	int ret;
ca6af7b9 LD	108	unsigned int reg;
	109	int gpio16 = (offset/8);
	110
	111	offset %= 8;
	112	reg = (gpio16) ? PALMAS_GPIO_DATA_DIR2 : PALMAS_GPIO_DATA_DIR;
3d50a278	113
ca6af7b9	114	ret = palmas_update_bits(palmas, PALMAS_GPIO_BASE, reg, BIT(offset), 0);
3d50a278	115	if (ret < 0)
58383c78 LW	116	dev_err(gc->parent, "Reg 0x%02x update failed, %d\n", reg,
58383c78 LW	117	ret);
3d50a278 LD	118	return ret;
	119	}
	120
	121	static int palmas_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
	122	{
5b68cc2d	123	struct palmas_gpio *pg = gpiochip_get_data(gc);
3d50a278 LD	124	struct palmas *palmas = pg->palmas;
	125
	126	return palmas_irq_get_virq(palmas, PALMAS_GPIO_0_IRQ + offset);
	127	}
	128
ca6af7b9 LD	129	static const struct palmas_device_data palmas_dev_data = {
	130	.ngpio = 8,
	131	};
	132
	133	static const struct palmas_device_data tps80036_dev_data = {
	134	.ngpio = 16,
	135	};
	136
722782fe	137	static const struct of_device_id of_palmas_gpio_match[] = {
ca6af7b9 LD	138	{ .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,},
	139	{ .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,},
	140	{ .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,},
	141	{ .compatible = "ti,tps80036-gpio", .data = &tps80036_dev_data,},
	142	{ },
	143	};
ca6af7b9	144
3d50a278 LD	145	static int palmas_gpio_probe(struct platform_device *pdev)
	146	{
	147	struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
	148	struct palmas_platform_data *palmas_pdata;
	149	struct palmas_gpio *palmas_gpio;
	150	int ret;
ca6af7b9 LD	151	const struct palmas_device_data *dev_data;
ca6af7b9 LD	152
fd46d5c3	153	dev_data = of_device_get_match_data(&pdev->dev);
ca6af7b9 LD	154	if (!dev_data)
ca6af7b9 LD	155	dev_data = &palmas_dev_data;
3d50a278 LD	156
	157	palmas_gpio = devm_kzalloc(&pdev->dev,
	158	sizeof(*palmas_gpio), GFP_KERNEL);
5605beb2	159	if (!palmas_gpio)
3d50a278	160	return -ENOMEM;
3d50a278 LD	161
	162	palmas_gpio->palmas = palmas;
	163	palmas_gpio->gpio_chip.owner = THIS_MODULE;
	164	palmas_gpio->gpio_chip.label = dev_name(&pdev->dev);
ca6af7b9	165	palmas_gpio->gpio_chip.ngpio = dev_data->ngpio;
9fb1f39e	166	palmas_gpio->gpio_chip.can_sleep = true;
3d50a278 LD	167	palmas_gpio->gpio_chip.direction_input = palmas_gpio_input;
	168	palmas_gpio->gpio_chip.direction_output = palmas_gpio_output;
	169	palmas_gpio->gpio_chip.to_irq = palmas_gpio_to_irq;
	170	palmas_gpio->gpio_chip.set = palmas_gpio_set;
	171	palmas_gpio->gpio_chip.get = palmas_gpio_get;
58383c78	172	palmas_gpio->gpio_chip.parent = &pdev->dev;
3d50a278	173	#ifdef CONFIG_OF_GPIO
5763318f	174	palmas_gpio->gpio_chip.of_node = pdev->dev.of_node;
3d50a278 LD	175	#endif
	176	palmas_pdata = dev_get_platdata(palmas->dev);
	177	if (palmas_pdata && palmas_pdata->gpio_base)
	178	palmas_gpio->gpio_chip.base = palmas_pdata->gpio_base;
	179	else
	180	palmas_gpio->gpio_chip.base = -1;
	181
297bf067 LD	182	ret = devm_gpiochip_add_data(&pdev->dev, &palmas_gpio->gpio_chip,
297bf067 LD	183	palmas_gpio);
3d50a278 LD	184	if (ret < 0) {
	185	dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
	186	return ret;
	187	}
	188
	189	platform_set_drvdata(pdev, palmas_gpio);
	190	return ret;
	191	}
	192
3d50a278 LD	193	static struct platform_driver palmas_gpio_driver = {
3d50a278 LD	194	.driver.name = "palmas-gpio",
5763318f	195	.driver.of_match_table = of_palmas_gpio_match,
3d50a278	196	.probe = palmas_gpio_probe,
3d50a278 LD	197	};
	198
	199	static int __init palmas_gpio_init(void)
	200	{
	201	return platform_driver_register(&palmas_gpio_driver);
	202	}
	203	subsys_initcall(palmas_gpio_init);