ARM: dts: exynos: Enable HDMI for Arndale Octa board

* GPIO for HDMI hot plug detect
  GPX3_7 is used. The HPD awareness is done when the GPIO is active high.

* Enable HDMI block in Exynos5420
  HDMI VDD and PLL consume 1.0V LDO6 (PVDD_ANAIP_1V0) and HDMI oscillator
  requires 1.8V LDO7 (PVDD_ANAIP_1V8).

* Support HDMI display data channel
  I2C #2 is assigned for the HDMI DDC. It enables the EDID access.

Cc: Kukjin Kim <kgene@kernel.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Milo Kim <woogyom.kim@gmail.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/exynos5420-arndale-octa.dts b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
index 39a3b81478fd..d2ad48e19572 100644
--- a/arch/arm/boot/dts/exynos5420-arndale-octa.dts
+++ b/arch/arm/boot/dts/exynos5420-arndale-octa.dts
@@ -70,6 +70,15 @@
         status = "disabled";
 };
 
+&hdmi {
+        hpd-gpios = <&gpx3 7 GPIO_ACTIVE_HIGH>;
+        vdd_osc-supply = <&ldo7_reg>;
+        vdd_pll-supply = <&ldo6_reg>;
+        vdd-supply = <&ldo6_reg>;
+        ddc = <&i2c_2>;
+        status = "okay";
+};
+
 &hsi2c_4 {
         status = "okay";
 
@@ -347,6 +356,10 @@
         };
 };
 
+&i2c_2 {
+        status = "okay";
+};
+
 &mmc_0 {
         status = "okay";
         broken-cd;