Enable IR remote controller which found in Amlogic's Meson-AXG SoCs.

Signed-off-by: Yixun Lan <yixun....@amlogic.com>

---

Changes since v2 at [2]
 - rebase to Kevin's v4.16/dt64 branch
 - this patch depend on pinctrl DT driver

Changes since v1 at [1]:
 - drop the compatbile 'amlogic,meson-gx-ir'

[2]
http://lists.infradead.org/pipermail/linux-amlogic/2017-December/005574.html

[1]
 http://lists.infradead.org/pipermail/linux-amlogic/2017-November/005527.html
---
 arch/arm64/boot/dts/amlogic/meson-axg-s400.dts |  6 ++++++
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi     | 14 ++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts 
b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
index 70eca1f8736a..e85fb665f12e 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-axg-s400.dts
@@ -20,3 +20,9 @@
 &uart_AO {
        status = "okay";
 };
+
+&ir {
+       status = "okay";
+       pinctrl-0 = <&remote_input_ao_pins>;
+       pinctrl-names = "default";
+};
diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi 
b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index a0d7b10da512..1cd34141a5c1 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -223,6 +223,13 @@
                                        #gpio-cells = <2>;
                                        gpio-ranges = <&pinctrl_aobus 0 0 15>;
                                };
+
+                               remote_input_ao_pins: remote_input_ao {
+                                       mux {
+                                               groups = "remote_input_ao";
+                                               function = "remote_input_ao";
+                                       };
+                               };
                        };
 
                        uart_AO: serial@3000 {
@@ -242,6 +249,13 @@
                                clock-names = "xtal", "pclk", "baud";
                                status = "disabled";
                        };
+
+                       ir: ir@8000 {
+                               compatible = "amlogic,meson-gxbb-ir";
+                               reg = <0x0 0x8000 0x0 0x20>;
+                               interrupts = <GIC_SPI 196 IRQ_TYPE_EDGE_RISING>;
+                               status = "disabled";
+                       };
                };
        };
 };
-- 
2.15.1

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