openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

GPIO: clps711x: Add DT support 

Add DT support to the CLPS711X GPIO driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
This commit is contained in:
Alexander Shiyan 2013-04-26 19:47:30 +04:00 committed by Olof Johansson
parent 55fe14ab87
commit a180132f27
2 changed files with 39 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
Documentation/devicetree/bindings/gpio/gpio-clps711x.txt Normal file
View File

@ -0,0 +1,28 @@
Cirrus Logic CLPS711X GPIO controller
Required properties:
- compatible: Should be "cirrus,clps711x-gpio"
- reg: Physical base GPIO controller registers location and length.
There should be two registers, first is DATA register, the second
is DIRECTION.
- gpio-controller: Marks the device node as a gpio controller.
- #gpio-cells: Should be two. The first cell is the pin number and
the second cell is used to specify the gpio polarity:
0 = active high
1 = active low
Note: Each GPIO port should have an alias correctly numbered in "aliases"
node.
Example:
aliases {
gpio0 = &porta;
};
porta: gpio@80000000 {
compatible = "cirrus,clps711x-gpio";
reg = <0x80000000 0x1>, <0x80000040 0x1>;
gpio-controller;
#gpio-cells = <2>;
};

14
drivers/gpio/gpio-clps711x.c
View File

@ -17,10 +17,11 @@
static int clps711x_gpio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
void __iomem *dat, *dir;
struct bgpio_chip *bgc;
struct resource *res;
int err, id = pdev->id;
int err, id = np ? of_alias_get_id(np, "gpio") : pdev->id;
if ((id < 0) || (id > 4))
return -ENODEV;
@ -76,10 +77,17 @@ static int clps711x_gpio_remove(struct platform_device *pdev)
return bgpio_remove(bgc);
}
static const struct of_device_id clps711x_gpio_ids[] = {
{ .compatible = "cirrus,clps711x-gpio" },
{ }
};
MODULE_DEVICE_TABLE(of, clps711x_gpio_ids);
static struct platform_driver clps711x_gpio_driver = {
.driver = {
.name = "clps711x-gpio",
.owner = THIS_MODULE,
.name = "clps711x-gpio",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(clps711x_gpio_ids),
},
.probe = clps711x_gpio_probe,
.remove = clps711x_gpio_remove,