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Subject[PATCH v2 4/6] dt-bindings: gpio: Add binding for Wii GPIO controller
Date
The Nintendo Wii game console has a GPIO controller, which is used for
the optical disk slot LED, buttons, poweroff, etc. This patch adds a
binding for this GPIO controller.

Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Rob Herring <robh@kernel.org>
---

v2:
- Drop the leading zero in the example, as suggested by Rob Herring
- Add some text to the commit message, as suggested by Linus Walleij
---
.../bindings/gpio/nintendo,hollywood-gpio.txt | 27 ++++++++++++++++++++++
.../devicetree/bindings/powerpc/nintendo/wii.txt | 9 +-------
2 files changed, 28 insertions(+), 8 deletions(-)
create mode 100644 Documentation/devicetree/bindings/gpio/nintendo,hollywood-gpio.txt

diff --git a/Documentation/devicetree/bindings/gpio/nintendo,hollywood-gpio.txt b/Documentation/devicetree/bindings/gpio/nintendo,hollywood-gpio.txt
new file mode 100644
index 000000000000..20fc72d9e61e
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/nintendo,hollywood-gpio.txt
@@ -0,0 +1,27 @@
+Nintendo Wii (Hollywood) GPIO controller
+
+Required properties:
+- compatible: "nintendo,hollywood-gpio
+- reg: Physical base address and length of the controller's registers.
+- gpio-controller: Marks the device node as a GPIO controller.
+- #gpio-cells: Should be <2>. The first cell is the pin number and the
+ second cell is used to specify optional parameters:
+ - bit 0 specifies polarity (0 for normal, 1 for inverted).
+
+Optional properties:
+- ngpios: see Documentation/devicetree/bindings/gpio/gpio.txt
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells: Should be two.
+- interrupts: Interrupt specifier for the controller's Broadway (PowerPC)
+ interrupt.
+- interrupt-parent: phandle of the parent interrupt controller.
+
+Example:
+
+ GPIO: gpio@d8000c0 {
+ #gpio-cells = <2>;
+ compatible = "nintendo,hollywood-gpio";
+ reg = <0x0d8000c0 0x40>;
+ gpio-controller;
+ ngpios = <24>;
+ }
diff --git a/Documentation/devicetree/bindings/powerpc/nintendo/wii.txt b/Documentation/devicetree/bindings/powerpc/nintendo/wii.txt
index 36afa322b04b..a3dc4b9fa11a 100644
--- a/Documentation/devicetree/bindings/powerpc/nintendo/wii.txt
+++ b/Documentation/devicetree/bindings/powerpc/nintendo/wii.txt
@@ -152,14 +152,7 @@ Nintendo Wii device tree

1.l) The General Purpose I/O (GPIO) controller node

- Represents the dual access 32 GPIO controller interface.
-
- Required properties:
-
- - #gpio-cells : <2>
- - compatible : should be "nintendo,hollywood-gpio"
- - reg : should contain the IPC registers location and length
- - gpio-controller
+ see Documentation/devicetree/bindings/gpio/nintendo,hollywood-gpio.txt

1.m) The control node

--
2.15.1
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