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Diffstat (limited to 'target/linux/ramips/patches-4.4/0026-DT-Add-documentation-for-gpio-ralink.patch')
-rw-r--r--target/linux/ramips/patches-4.4/0026-DT-Add-documentation-for-gpio-ralink.patch59
1 files changed, 59 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0026-DT-Add-documentation-for-gpio-ralink.patch b/target/linux/ramips/patches-4.4/0026-DT-Add-documentation-for-gpio-ralink.patch
new file mode 100644
index 0000000..7d5f98f
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0026-DT-Add-documentation-for-gpio-ralink.patch
@@ -0,0 +1,59 @@
+From d410e5478c622c01fcf31427533df5f433df9146 Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 28 Jul 2013 19:45:30 +0200
+Subject: [PATCH 26/53] DT: Add documentation for gpio-ralink
+
+Describe gpio-ralink binding.
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+Cc: linux-mips@linux-mips.org
+Cc: devicetree@vger.kernel.org
+Cc: linux-gpio@vger.kernel.org
+---
+ .../devicetree/bindings/gpio/gpio-ralink.txt | 40 ++++++++++++++++++++
+ 1 file changed, 40 insertions(+)
+ create mode 100644 Documentation/devicetree/bindings/gpio/gpio-ralink.txt
+
+--- /dev/null
++++ b/Documentation/devicetree/bindings/gpio/gpio-ralink.txt
+@@ -0,0 +1,40 @@
++Ralink SoC GPIO controller bindings
++
++Required properties:
++- compatible:
++ - "ralink,rt2880-gpio" for Ralink controllers
++- #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
++- reg : Physical base address and length of the controller's registers
++- interrupt-parent: phandle to the INTC device node
++- interrupts : Specify the INTC interrupt number
++- ralink,num-gpios : Specify the number of GPIOs
++- ralink,register-map : The register layout depends on the GPIO bank and actual
++ SoC type. Register offsets need to be in this order.
++ [ INT, EDGE, RENA, FENA, DATA, DIR, POL, SET, RESET, TOGGLE ]
++
++Optional properties:
++- ralink,gpio-base : Specify the GPIO chips base number
++
++Example:
++
++ gpio0: gpio@600 {
++ compatible = "ralink,rt5350-gpio", "ralink,rt2880-gpio";
++
++ #gpio-cells = <2>;
++ gpio-controller;
++
++ reg = <0x600 0x34>;
++
++ interrupt-parent = <&intc>;
++ interrupts = <6>;
++
++ ralink,gpio-base = <0>;
++ ralink,num-gpios = <24>;
++ ralink,register-map = [ 00 04 08 0c
++ 20 24 28 2c
++ 30 34 ];
++
++ };