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

/*
 *  CLPS711X GPIO driver
 *
 *  Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#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;
	struct resource *res;
	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;

	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	dat = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(dat))
		return PTR_ERR(dat);

	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	dir = devm_ioremap_resource(&pdev->dev, res);
	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 __maybe_unused 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	= of_match_ptr(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
a3b8d4a5 AS	1	/*
	2	* CLPS711X GPIO driver
	3	*
55fe14ab	4	* Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
a3b8d4a5 AS	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11
55fe14ab	12	#include <linux/err.h>
a3b8d4a5	13	#include <linux/module.h>
0f4630f3	14	#include <linux/gpio/driver.h>
a3b8d4a5 AS	15	#include <linux/platform_device.h>
a3b8d4a5 AS	16
55fe14ab	17	static int clps711x_gpio_probe(struct platform_device *pdev)
a3b8d4a5	18	{
a180132f	19	struct device_node *np = pdev->dev.of_node;
55fe14ab	20	void __iomem dat, dir;
0f4630f3	21	struct gpio_chip *gc;
55fe14ab	22	struct resource *res;
1bdb5c8e	23	int err, id;
a3b8d4a5	24
1bdb5c8e AS	25	if (!np)
	26	return -ENODEV;
	27
	28	id = of_alias_get_id(np, "gpio");
55fe14ab AS	29	if ((id < 0) \|\| (id > 4))
55fe14ab AS	30	return -ENODEV;
a3b8d4a5	31
0f4630f3 LW	32	gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
0f4630f3 LW	33	if (!gc)
55fe14ab	34	return -ENOMEM;
a3b8d4a5	35
55fe14ab AS	36	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	37	dat = devm_ioremap_resource(&pdev->dev, res);
	38	if (IS_ERR(dat))
	39	return PTR_ERR(dat);
	40
	41	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
	42	dir = devm_ioremap_resource(&pdev->dev, res);
	43	if (IS_ERR(dir))
	44	return PTR_ERR(dir);
	45
	46	switch (id) {
	47	case 3:
	48	/* PORTD is inverted logic for direction register */
0f4630f3	49	err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
55fe14ab AS	50	NULL, dir, 0);
	51	break;
	52	default:
0f4630f3	53	err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
55fe14ab AS	54	dir, NULL, 0);
	55	break;
	56	}
a3b8d4a5	57
55fe14ab AS	58	if (err)
55fe14ab AS	59	return err;
a3b8d4a5	60
55fe14ab AS	61	switch (id) {
	62	case 4:
	63	/* PORTE is 3 lines only */
0f4630f3	64	gc->ngpio = 3;
55fe14ab AS	65	break;
	66	default:
	67	break;
	68	}
d6a2fa04	69
1bdb5c8e	70	gc->base = -1;
0f4630f3 LW	71	gc->owner = THIS_MODULE;
0f4630f3 LW	72	platform_set_drvdata(pdev, gc);
d6a2fa04	73
da9d6700	74	return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
d6a2fa04 AS	75	}
d6a2fa04 AS	76
e8b49e07	77	static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
1a4d458b	78	{ .compatible = "cirrus,ep7209-gpio" },
a180132f AS	79	{ }
	80	};
	81	MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
	82
55fe14ab AS	83	static struct platform_driver clps711x_gpio_driver = {
55fe14ab AS	84	.driver = {
a180132f	85	.name = "clps711x-gpio",
e8b49e07	86	.of_match_table = of_match_ptr(clps711x_gpio_ids),
55fe14ab AS	87	},
55fe14ab AS	88	.probe = clps711x_gpio_probe,
a3b8d4a5	89	};
55fe14ab	90	module_platform_driver(clps711x_gpio_driver);
a3b8d4a5	91
55fe14ab	92	MODULE_LICENSE("GPL");
a3b8d4a5 AS	93	MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
a3b8d4a5 AS	94	MODULE_DESCRIPTION("CLPS711X GPIO driver");
21708c99	95	MODULE_ALIAS("platform:clps711x-gpio");