4 * Copyright (C) 2012,2013 Alexander Shiyan <shc_work@mail.ru>
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.
12 #include <linux/err.h>
13 #include <linux/gpio.h>
14 #include <linux/module.h>
15 #include <linux/basic_mmio_gpio.h>
16 #include <linux/platform_device.h>
18 static int clps711x_gpio_probe(struct platform_device *pdev)
20 struct device_node *np = pdev->dev.of_node;
21 void __iomem *dat, *dir;
22 struct bgpio_chip *bgc;
24 int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id;
26 if ((id < 0) || (id > 4))
29 bgc = devm_kzalloc(&pdev->dev, sizeof(*bgc), GFP_KERNEL);
33 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
34 dat = devm_ioremap_resource(&pdev->dev, res);
38 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
39 dir = devm_ioremap_resource(&pdev->dev, res);
45 /* PORTD is inverted logic for direction register */
46 err = bgpio_init(bgc, &pdev->dev, 1, dat, NULL, NULL,
50 err = bgpio_init(bgc, &pdev->dev, 1, dat, NULL, NULL,
60 /* PORTE is 3 lines only */
67 bgc->gc.base = id * 8;
68 bgc->gc.owner = THIS_MODULE;
69 platform_set_drvdata(pdev, bgc);
71 return gpiochip_add(&bgc->gc);
74 static int clps711x_gpio_remove(struct platform_device *pdev)
76 struct bgpio_chip *bgc = platform_get_drvdata(pdev);
78 return bgpio_remove(bgc);
81 static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
82 { .compatible = "cirrus,clps711x-gpio" },
85 MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
87 static struct platform_driver clps711x_gpio_driver = {
89 .name = "clps711x-gpio",
90 .of_match_table = of_match_ptr(clps711x_gpio_ids),
92 .probe = clps711x_gpio_probe,
93 .remove = clps711x_gpio_remove,
95 module_platform_driver(clps711x_gpio_driver);
97 MODULE_LICENSE("GPL");
98 MODULE_AUTHOR("Alexander Shiyan <shc_work@mail.ru>");
99 MODULE_DESCRIPTION("CLPS711X GPIO driver");
100 MODULE_ALIAS("platform:clps711x-gpio");