This GPIO controller is used on UniPhier SoC family.
The vendor specific property "socionext,interrupt-ranges" is for
specifying interrupt mapping to the parent interrupt controller
because the mapping is not contiguous. It works like "ranges",
but transforms "interrupts" instead of "reg".
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
---
.../devicetree/bindings/gpio/gpio-uniphier.txt | 40 ++++++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 Documentation/devicetree/bindings/gpio/gpio-uniphier.txt
diff --git a/Documentation/devicetree/bindings/gpio/gpio-uniphier.txt b/Documentation/devicetree/bindings/gpio/gpio-uniphier.txt
new file mode 100644
index 0000000..6d9251a
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-uniphier.txt
@@ -0,0 +1,40 @@
+UniPhier GPIO controller
+
+Required properties:
+- compatible: Should be "socionext,uniphier-gpio".
+- reg: Specifies offset and length of the register set for the device.
+- 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.
+- interrupt-parent: Specifies the parent interrupt controller.
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells: Should be 2. The first cell defines the interrupt number.
+ The second cell bits[3:0] is used to specify trigger type as follows:
+ 1 = low-to-high edge triggered
+ 2 = high-to-low edge triggered
+ 4 = active high level-sensitive
+ 8 = active low level-sensitive
+ Valid combinations are 1, 2, 3, 4, 8.
+- ngpios: Specifies the number of GPIO lines.
+- gpio-ranges: Mapping to pin controller pins (as described in gpio.txt)
+- socionext,interrupt-ranges: Specifies an interrupt number mapping between
+ this GPIO controller and its interrupt parent, in the form of arbitrary
+ number of <child-interrupt-base parent-interrupt-base length> triplets.
+
+Optional properties:
+- gpio-ranges-group-names: Used for named gpio ranges (as described in gpio.txt)
+
+Example:
+ gpio: gpio@55000000 {
+ compatible = "socionext,uniphier-gpio";
+ reg = <0x55000000 0x200>;
+ interrupt-parent = <&aidet>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-ranges = <&pinctrl 0 0 0>;
+ gpio-ranges-group-names = "gpio_range";
+ ngpios = <248>;
+ socionext,interrupt-ranges = <0 48 16>, <16 154 5>, <21 217 3>;
+ };
--
2.7.4
--
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