This commit add missing dt bindings documentation for mt7621-gpio
driver. There is some missing stuff here about interrupts with is
not also being used in the mt7621.dtsi file. So just include in
staging a incomplete version before moving this to kernel's dt-bindings
place.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@xxxxxxxxx>
---
drivers/staging/mt7621-gpio/mtk,mt7621-gpio.txt | 51 +++++++++++++++++++++++++
1 file changed, 51 insertions(+)
create mode 100644 drivers/staging/mt7621-gpio/mtk,mt7621-gpio.txt
diff --git a/drivers/staging/mt7621-gpio/mtk,mt7621-gpio.txt b/drivers/staging/mt7621-gpio/mtk,mt7621-gpio.txt
new file mode 100644
index 0000000..5fe4bb5
--- /dev/null
+++ b/drivers/staging/mt7621-gpio/mtk,mt7621-gpio.txt
@@ -0,0 +1,51 @@
+Mediatek SoC GPIO controller bindings
+
+The IP core used inside these SoCs has 3 banks of 32 GPIOs each.
+The registers of all the banks are interwoven inside one single IO range.
+We load one GPIO controller instance per bank. To make this possible
+we support 2 types of nodes. The parent node defines the memory I/O range and
+has 3 children each describing a single bank.
+
+Required properties for the top level node:
+- compatible:
+ - "mtk,mt7621-gpio" for Mediatek controllers
+- reg : Physical base address and length of the controller's registers
+
+Required properties for the GPIO bank node:
+- compatible:
+ - "mtk,mt7621-gpio-bank" for Mediatek banks
+- #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 : The id of the bank that the node describes.
+
+Example:
+ gpio@600 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ compatible = "mtk,mt7621-gpio";
+ reg = <0x600 0x100>;
+
+ gpio0: bank@0 {
+ reg = <0>;
+ compatible = "mtk,mt7621-gpio-bank";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ gpio1: bank@1 {
+ reg = <1>;
+ compatible = "mtk,mt7621-gpio-bank";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+
+ gpio2: bank@2 {
+ reg = <2>;
+ compatible = "mtk,mt7621-gpio-bank";
+ gpio-controller;
+ #gpio-cells = <2>;
+ };
+ };
--
2.7.4
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