Add DT support to the CLPS711X GPIO driver.
Signed-off-by: Alexander Shiyan <shc_w...@mail.ru>
---
.../devicetree/bindings/gpio/clps711x-gpio.txt | 28 ++++++++++++++++++++++
drivers/gpio/gpio-clps711x.c | 14 ++++++++---
2 files changed, 39 insertions(+), 3 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/clps711x-gpio.txt
diff --git a/Documentation/devicetree/bindings/gpio/clps711x-gpio.txt
b/Documentation/devicetree/bindings/gpio/clps711x-gpio.txt
new file mode 100644
index 0000000..0fe2bb6
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/clps711x-gpio.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 3c71815..e2e7ec9 100644
--- a/drivers/gpio/gpio-clps711x.c
+++ b/drivers/gpio/gpio-clps711x.c
@@ -16,10 +16,11 @@
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,
--
1.8.1.5
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