[linux-2.6-block.git] / drivers / gpio / gpio-clps711x.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  CLPS711X GPIO driver
 *
 *  Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
 */

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

static int clps711x_gpio_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	void __iomem *dat, *dir;
	struct gpio_chip *gc;
	int err, id;

	if (!np)
		return -ENODEV;

	id = of_alias_get_id(np, "gpio");
	if ((id < 0) || (id > 4))
		return -ENODEV;

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

	dat = devm_platform_ioremap_resource(pdev, 0);
	if (IS_ERR(dat))
		return PTR_ERR(dat);

	dir = devm_platform_ioremap_resource(pdev, 1);
	if (IS_ERR(dir))
		return PTR_ERR(dir);

	switch (id) {
	case 3:
		/* PORTD is inverted logic for direction register */
		err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
				 NULL, dir, 0);
		break;
	default:
		err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
				 dir, NULL, 0);
		break;
	}

	if (err)
		return err;

	switch (id) {
	case 4:
		/* PORTE is 3 lines only */
		gc->ngpio = 3;
		break;
	default:
		break;
	}

	gc->base = -1;
	gc->owner = THIS_MODULE;
	platform_set_drvdata(pdev, gc);

	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
}

static const struct of_device_id clps711x_gpio_ids[] = {
	{ .compatible = "cirrus,ep7209-gpio" },
	{ }
};
MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);

static struct platform_driver clps711x_gpio_driver = {
	.driver	= {
		.name		= "clps711x-gpio",
		.of_match_table	= clps711x_gpio_ids,
	},
	.probe	= clps711x_gpio_probe,
};
module_platform_driver(clps711x_gpio_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
MODULE_DESCRIPTION("CLPS711X GPIO driver");
MODULE_ALIAS("platform:clps711x-gpio");
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
a3b8d4a5 AS	2	/*
	3	* CLPS711X GPIO driver
	4	*
55fe14ab	5	* Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
a3b8d4a5 AS	6	*/
a3b8d4a5 AS	7
55fe14ab	8	#include <linux/err.h>
a3b8d4a5	9	#include <linux/module.h>
0f4630f3	10	#include <linux/gpio/driver.h>
a3b8d4a5 AS	11	#include <linux/platform_device.h>
a3b8d4a5 AS	12
55fe14ab	13	static int clps711x_gpio_probe(struct platform_device *pdev)
a3b8d4a5	14	{
a180132f	15	struct device_node *np = pdev->dev.of_node;
55fe14ab	16	void __iomem dat, dir;
0f4630f3	17	struct gpio_chip *gc;
1bdb5c8e	18	int err, id;
a3b8d4a5	19
1bdb5c8e AS	20	if (!np)
	21	return -ENODEV;
	22
	23	id = of_alias_get_id(np, "gpio");
55fe14ab AS	24	if ((id < 0) \|\| (id > 4))
55fe14ab AS	25	return -ENODEV;
a3b8d4a5	26
0f4630f3 LW	27	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
0f4630f3 LW	28	if (!gc)
55fe14ab	29	return -ENOMEM;
a3b8d4a5	30
09ec4735	31	dat = devm_platform_ioremap_resource(pdev, 0);
55fe14ab AS	32	if (IS_ERR(dat))
	33	return PTR_ERR(dat);
	34
09ec4735	35	dir = devm_platform_ioremap_resource(pdev, 1);
55fe14ab AS	36	if (IS_ERR(dir))
	37	return PTR_ERR(dir);
	38
	39	switch (id) {
	40	case 3:
	41	/* PORTD is inverted logic for direction register */
0f4630f3	42	err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
55fe14ab AS	43	NULL, dir, 0);
	44	break;
	45	default:
0f4630f3	46	err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
55fe14ab AS	47	dir, NULL, 0);
	48	break;
	49	}
a3b8d4a5	50
55fe14ab AS	51	if (err)
55fe14ab AS	52	return err;
a3b8d4a5	53
55fe14ab AS	54	switch (id) {
	55	case 4:
	56	/* PORTE is 3 lines only */
0f4630f3	57	gc->ngpio = 3;
55fe14ab AS	58	break;
	59	default:
	60	break;
	61	}
d6a2fa04	62
1bdb5c8e	63	gc->base = -1;
0f4630f3 LW	64	gc->owner = THIS_MODULE;
0f4630f3 LW	65	platform_set_drvdata(pdev, gc);
d6a2fa04	66
da9d6700	67	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
d6a2fa04 AS	68	}
d6a2fa04 AS	69
a0d22277	70	static const struct of_device_id clps711x_gpio_ids[] = {
1a4d458b	71	{ .compatible = "cirrus,ep7209-gpio" },
a180132f AS	72	{ }
	73	};
	74	MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
	75
55fe14ab AS	76	static struct platform_driver clps711x_gpio_driver = {
55fe14ab AS	77	.driver = {
a180132f	78	.name = "clps711x-gpio",
a0d22277	79	.of_match_table = clps711x_gpio_ids,
55fe14ab AS	80	},
55fe14ab AS	81	.probe = clps711x_gpio_probe,
a3b8d4a5	82	};
55fe14ab	83	module_platform_driver(clps711x_gpio_driver);
a3b8d4a5	84
55fe14ab	85	MODULE_LICENSE("GPL");
a3b8d4a5 AS	86	MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
a3b8d4a5 AS	87	MODULE_DESCRIPTION("CLPS711X GPIO driver");
21708c99	88	MODULE_ALIAS("platform:clps711x-gpio");