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/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 gpiochip_add_data(gc
, NULL
);
73 static int clps711x_gpio_remove(struct platform_device
*pdev
)
75 struct gpio_chip
*gc
= platform_get_drvdata(pdev
);
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");