summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorAlexander Shiyan <shc_work@mail.ru>2013-04-26 19:47:30 +0400
committerOlof Johansson <olof@lixom.net>2013-06-11 15:44:57 -0700
commita180132f270a96d3b0e1e290b2911647abe9ed8e (patch)
tree3d4e620cb40fc29ea0611be50167f74413063a4f
parent55fe14ab872ab7a60944332c79640d561e93dfe8 (diff)
downloadop-kernel-dev-a180132f270a96d3b0e1e290b2911647abe9ed8e.zip
op-kernel-dev-a180132f270a96d3b0e1e290b2911647abe9ed8e.tar.gz
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.txt28
-rw-r--r--drivers/gpio/gpio-clps711x.c14
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 0000000..e0d0446
--- /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 6ce8a8c..0edaf2c 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,
OpenPOWER on IntegriCloud