Add documentation for GPIO properties specific to OMAP.
Signed-off-by: Benoit Cousson <b-cousson@xxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
---
.../devicetree/bindings/gpio/gpio-omap.txt | 33 ++++++++++++++++++++
1 files changed, 33 insertions(+), 0 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-omap.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-omap.txt b/Documentation/devicetree/bindings/gpio/gpio-omap.txt
new file mode 100644
index 0000000..692b1c7
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-omap.txt
@@ -0,0 +1,33 @@
+OMAP GPIO controller
+
+Required properties:
+- compatible:
+ - "ti,omap2-gpio" for OMAP2 and OMAP3 controllers
+ - "ti,omap4-gpio" for OMAP4 controller
+- #gpio-cells : Should be two.
+ - first cell is the pin number
+ - second cell is used to specify optional parameters (unused)
+- gpio-controller : Marks the device node as a GPIO controller.
+
+OMAP specific properties:
+- hwmods: Name of the hwmod associated to the GPIO
+- id: 32 bits to identify the id (1 based index)
+- bank_width: number of pin supported by the controller (16 or 32)
+- debounce: set if the controller support the debouce funtionnality
+- bank_count: number of controller support by the SoC. This is a temporary
+ hack until the bank_count is removed from the driver.
+
+
+Example:
+
+gpio4: gpio4 {
+ compatible = "ti,omap4-gpio", "ti,omap-gpio";
+ hwmods = "gpio4";
+ id = <4>;
+ bank_width = <32>;
+ debounce;
+ no_idle_on_suspend;
+ #gpio-cells = <2>;
+ gpio-controller;
+};
+
--
1.7.0.4
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