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Alexander Shiyana3b8d4a2012-10-09 20:05:56 +04001/*
2 * CLPS711X GPIO driver
3 *
Alexander Shiyan55fe14a2013-04-26 19:47:28 +04004 * Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +04005 *
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
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040012#include <linux/err.h>
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040013#include <linux/gpio.h>
14#include <linux/module.h>
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040015#include <linux/basic_mmio_gpio.h>
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040016#include <linux/platform_device.h>
17
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040018static int clps711x_gpio_probe(struct platform_device *pdev)
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040019{
Alexander Shiyana1801322013-04-26 19:47:30 +040020 struct device_node *np = pdev->dev.of_node;
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040021 void __iomem *dat, *dir;
22 struct bgpio_chip *bgc;
23 struct resource *res;
Alexander Shiyana1801322013-04-26 19:47:30 +040024 int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id;
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040025
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040026 if ((id < 0) || (id > 4))
27 return -ENODEV;
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040028
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040029 bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
30 if (!bgc)
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040031 return -ENOMEM;
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040032
33 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
34 dat = devm_ioremap_resource(&pdev->dev, res);
35 if (IS_ERR(dat))
36 return PTR_ERR(dat);
37
38 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
39 dir = devm_ioremap_resource(&pdev->dev, res);
40 if (IS_ERR(dir))
41 return PTR_ERR(dir);
42
43 switch (id) {
44 case 3:
45 /* PORTD is inverted logic for direction register */
46 err = bgpio_init(bgc, &pdev->dev, 1, dat, NULL, NULL,
47 NULL, dir, 0);
48 break;
49 default:
50 err = bgpio_init(bgc, &pdev->dev, 1, dat, NULL, NULL,
51 dir, NULL, 0);
52 break;
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040053 }
54
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040055 if (err)
56 return err;
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040057
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040058 switch (id) {
59 case 4:
60 /* PORTE is 3 lines only */
61 bgc->gc.ngpio = 3;
62 break;
63 default:
64 break;
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040065 }
66
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040067 bgc->gc.base = id * 8;
68 platform_set_drvdata(pdev, bgc);
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040069
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040070 return gpiochip_add(&bgc->gc);
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040071}
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040072
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040073static int clps711x_gpio_remove(struct platform_device *pdev)
74{
75 struct bgpio_chip *bgc = platform_get_drvdata(pdev);
76
77 return bgpio_remove(bgc);
78}
79
Alexander Shiyane8b49e02013-12-24 18:08:53 +040080static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
Alexander Shiyana1801322013-04-26 19:47:30 +040081 { .compatible = "cirrus,clps711x-gpio" },
82 { }
83};
84MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
85
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040086static struct platform_driver clps711x_gpio_driver = {
87 .driver = {
Alexander Shiyana1801322013-04-26 19:47:30 +040088 .name = "clps711x-gpio",
89 .owner = THIS_MODULE,
Alexander Shiyane8b49e02013-12-24 18:08:53 +040090 .of_match_table = of_match_ptr(clps711x_gpio_ids),
Alexander Shiyan55fe14a2013-04-26 19:47:28 +040091 },
92 .probe = clps711x_gpio_probe,
93 .remove = clps711x_gpio_remove,
94};
95module_platform_driver(clps711x_gpio_driver);
96
97MODULE_LICENSE("GPL");
Alexander Shiyana3b8d4a2012-10-09 20:05:56 +040098MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
99MODULE_DESCRIPTION("CLPS711X GPIO driver");