[PATCH 2/9] dt-bindings: interrupt-controller: add DT binding for meson GPIO interrupt controller

From: Jerome Brunet
Date: Wed Oct 19 2016 - 11:33:45 EST

This commit adds the device tree bindings description for Amlogic's GPIO
interrupt controller available on the meson8, meson8b and gxbb SoC families

Signed-off-by: Jerome Brunet <jbrunet@xxxxxxxxxxxx>

Rob, I did not include the Ack you gave for the RFC as bindings have slightly
changed. Only the interrupt property has be removed following a discussion I
had with Marc.

.../amlogic,meson-gpio-intc.txt | 31 ++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt

diff --git a/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt b/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt
new file mode 100644
index 000000000000..2464d9a0865d
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/amlogic,meson-gpio-intc.txt
@@ -0,0 +1,31 @@
+Amlogic meson GPIO interrupt controller
+Meson SoCs contains an interrupt controller which is able watch the SoC pads
+and generate an interrupt on edges or level. The controller is essentially a
+256 pads to 8 GIC interrupt multiplexer, with a filter block to select edge
+or level and polarity. We donât expose all 256 mux inputs because the
+documentation shows that upper part is not mapped to any pad. The actual number
+of interrupt exposed depends on the SoC.
+Required properties:
+- compatible : should be either
+ "amlogic,meson8-gpio-intcâ for meson8 SoCs (AML7826MX) or
+ âamlogic,meson8b-gpio-intcâ for meson8b SoCs (S805) or
+ âamlogic,meson-gxbb-gpio-intcâ for GXBB SoCs (S905)
+- interrupt-parent : a phandle to the GIC the interrupts are routed to.
+ Usually this is provided at the root level of the device tree as it is
+ common to most of the SoC
+- reg : Specifies base physical address and size of the registers.
+- interrupt-controller : Identifies the node as an interrupt controller.
+- #interrupt-cells : Specifies the number of cells needed to encode an
+ interrupt source. The value must be 2.
+gpio_interrupt: interrupt-controller@9880 {
+ compatible = "amlogic,meson-gxbb-gpio-intc";
+ reg = <0x0 0x9880 0x0 0x10>;
+ interrupt-controller;
+ #interrupt-cells = <2>;