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/module.h>
14 #include <linux/gpio/driver.h>
15 #include <linux/platform_device.h>
17 static int clps711x_gpio_probe(struct platform_device *pdev)
19 struct device_node *np = pdev->dev.of_node;
20 void __iomem *dat, *dir;
23 int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id;
25 if ((id < 0) || (id > 4))
28 gc = devm_kzalloc(&pdev->dev, sizeof(*gc), GFP_KERNEL);
32 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
33 dat = devm_ioremap_resource(&pdev->dev, res);
37 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
38 dir = devm_ioremap_resource(&pdev->dev, res);
44 /* PORTD is inverted logic for direction register */
45 err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
49 err = bgpio_init(gc, &pdev->dev, 1, dat, NULL, NULL,
59 /* PORTE is 3 lines only */
67 gc->owner = THIS_MODULE;
68 platform_set_drvdata(pdev, gc);
70 return devm_gpiochip_add_data(&pdev->dev, gc, NULL);
73 static const struct of_device_id __maybe_unused clps711x_gpio_ids[] = {
74 { .compatible = "cirrus,clps711x-gpio" },
77 MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
79 static struct platform_driver clps711x_gpio_driver = {
81 .name = "clps711x-gpio",
82 .of_match_table = of_match_ptr(clps711x_gpio_ids),
84 .probe = clps711x_gpio_probe,
86 module_platform_driver(clps711x_gpio_driver);
88 MODULE_LICENSE("GPL");
90 MODULE_DESCRIPTION("CLPS711X GPIO driver");
91 MODULE_ALIAS("platform:clps711x-gpio");