diff options
| author | Alexander Shiyan <shc_work@mail.ru> | 2013-04-26 19:47:30 +0400 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2013-06-11 15:44:57 -0700 |
| commit | a180132f270a96d3b0e1e290b2911647abe9ed8e (patch) | |
| tree | 3d4e620cb40fc29ea0611be50167f74413063a4f | |
| parent | 55fe14ab872ab7a60944332c79640d561e93dfe8 (diff) | |
| download | linux-stable-a180132f270a96d3b0e1e290b2911647abe9ed8e.tar.gz linux-stable-a180132f270a96d3b0e1e290b2911647abe9ed8e.tar.bz2 linux-stable-a180132f270a96d3b0e1e290b2911647abe9ed8e.zip | |
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>
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-clps711x.txt | 28 | ||||
| -rw-r--r-- | drivers/gpio/gpio-clps711x.c | 14 |
2 files changed, 39 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt b/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt new file mode 100644 index 000000000000..e0d0446a6b78 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/gpio-clps711x.txt @@ -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>; +}; diff --git a/drivers/gpio/gpio-clps711x.c b/drivers/gpio/gpio-clps711x.c index 6ce8a8c1669e..0edaf2ce9266 100644 --- a/drivers/gpio/gpio-clps711x.c +++ b/drivers/gpio/gpio-clps711x.c @@ -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, |