[PATCH v2 0/8] ARM: dts: exynos5420: add support for hdmi subsystem

[PATCH v2 0/8] ARM: dts: exynos5420: add support for hdmi subsystem

[Rahul Sharma]

Common properties for I2C and Hdmi Subsystem is moved to exynos5
dtsi file. It also adds Device tree nodes and clocks information
for exynos5420 SoC. It adds pinctrl node for hdmi hpd gpio and
update binding documents.

This patch is based on v3.11-next/soc-exynos5420-pinctrl branch
at http://git.kernel.org/cgit/linux/kernel/git/kgene/linux-samsung.git

device tree binding document for hdmi compatible type is update at
http://www.spinics.net/lists/dri-devel/msg39987.html

v2:
1) Added patch for moving common i2c properties to exynos5.dtsi
2) Added patch for moving common hdmi, mixer properties to exynos5.dtsi
3) moved hpd pinctrl node to board file.
4) Added Sachin's patch to update binding document for hdmi with hpd
information.

Andrew Bresticker (1):
  ARM: dts: exynos5420: add i2c device nodes

Rahul Sharma (6):
  ARM: dts: exynos5250: move common i2c properties to exynos5 dtsi
  ARM: dts: exynos5250: move common hdmi properties to exynos5 dtsi
  ARM: dts: exynos5420: add dt nodes for hdmi subsystem
  ARM: dts: exynos5420: add clocks for hdmi subsystem
  ARM: dts: exynos5420: add hdmi hpd gpio pinctrl node
  of/documentation: update with clock information for exynos hdmi
    subsystem

Sachin Kamat (1):
  of/documentation: Update hpd gpio property for exynos_hdmi

 .../devicetree/bindings/video/exynos_hdmi.txt      |   20 ++++++--
 .../devicetree/bindings/video/exynos_mixer.txt     |    4 ++
 arch/arm/boot/dts/cros5250-common.dtsi             |    2 +-
 arch/arm/boot/dts/exynos5.dtsi                     |   48 ++++++++++++++++++++
 arch/arm/boot/dts/exynos5250-arndale.dts           |    8 +++-
 arch/arm/boot/dts/exynos5250-smdk5250.dts          |   10 +++-
 arch/arm/boot/dts/exynos5250-snow.dts              |    8 ++++
 arch/arm/boot/dts/exynos5250.dtsi                  |   28 +-----------
 arch/arm/boot/dts/exynos5420-smdk5420.dts          |   31 +++++++++++++
 arch/arm/boot/dts/exynos5420.dtsi                  |   46 +++++++++++++++++++
 10 files changed, 171 insertions(+), 34 deletions(-)

-- 
1.7.10.4

[PATCH v2 1/8] ARM: dts: exynos5250: move common i2c properties to exynos5 dtsi

[Rahul Sharma]

I2C nodes shares many properties across exynos5 SoCs (exynos5250
and exyno5420). Common code is moved to exynos5.dtsi which is
included in exyno5250 and exynos5420 SoC files.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 arch/arm/boot/dts/exynos5.dtsi            |   36 +++++++++++++++++++++++++++++
 arch/arm/boot/dts/exynos5250-arndale.dts  |    1 +
 arch/arm/boot/dts/exynos5250-smdk5250.dts |    3 +++
 arch/arm/boot/dts/exynos5250.dtsi         |   20 ----------------
 4 files changed, 40 insertions(+), 20 deletions(-)

diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi
index f65e124..1ae179e 100644
--- a/arch/arm/boot/dts/exynos5.dtsi
+++ b/arch/arm/boot/dts/exynos5.dtsi
@@ -108,4 +108,40 @@
 		interrupts = <0 42 0>;
 		status = "disabled";
 	};
+
+	i2c_0: i2c@12C60000 {
+		compatible = "samsung,s3c2440-i2c";
+		reg = <0x12C60000 0x100>;
+		interrupts = <0 56 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c_1: i2c@12C70000 {
+		compatible = "samsung,s3c2440-i2c";
+		reg = <0x12C70000 0x100>;
+		interrupts = <0 57 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c_2: i2c@12C80000 {
+		compatible = "samsung,s3c2440-i2c";
+		reg = <0x12C80000 0x100>;
+		interrupts = <0 58 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c_3: i2c@12C90000 {
+		compatible = "samsung,s3c2440-i2c";
+		reg = <0x12C90000 0x100>;
+		interrupts = <0 59 0>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
 };
diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
index abc7272..5c7dd6d 100644
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -30,6 +30,7 @@
 	};
 
 	i2c@12C60000 {
+		status = "okay";
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-max-bus-freq = <20000>;
 		samsung,i2c-slave-addr = <0x66>;
diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index 35a66de..d3da369 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -28,6 +28,7 @@
 	};
 
 	i2c@12C60000 {
+		status = "okay";
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-max-bus-freq = <20000>;
 
@@ -62,6 +63,7 @@
 	};
 
 	i2c@12C70000 {
+		status = "okay";
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-max-bus-freq = <20000>;
 
@@ -101,6 +103,7 @@
 	};
 
 	i2c@12C80000 {
+		status = "okay";
 		samsung,i2c-sda-delay = <100>;
 		samsung,i2c-max-bus-freq = <66000>;
 
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index d04ab0a..baf6f88 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -217,11 +217,6 @@
 	};
 
 	i2c_0: i2c@12C60000 {
-		compatible = "samsung,s3c2440-i2c";
-		reg = <0x12C60000 0x100>;
-		interrupts = <0 56 0>;
-		#address-cells = <1>;
-		#size-cells = <0>;
 		clocks = <&clock 294>;
 		clock-names = "i2c";
 		pinctrl-names = "default";
@@ -229,11 +224,6 @@
 	};
 
 	i2c_1: i2c@12C70000 {
-		compatible = "samsung,s3c2440-i2c";
-		reg = <0x12C70000 0x100>;
-		interrupts = <0 57 0>;
-		#address-cells = <1>;
-		#size-cells = <0>;
 		clocks = <&clock 295>;
 		clock-names = "i2c";
 		pinctrl-names = "default";
@@ -241,11 +231,6 @@
 	};
 
 	i2c_2: i2c@12C80000 {
-		compatible = "samsung,s3c2440-i2c";
-		reg = <0x12C80000 0x100>;
-		interrupts = <0 58 0>;
-		#address-cells = <1>;
-		#size-cells = <0>;
 		clocks = <&clock 296>;
 		clock-names = "i2c";
 		pinctrl-names = "default";
@@ -253,11 +238,6 @@
 	};
 
 	i2c_3: i2c@12C90000 {
-		compatible = "samsung,s3c2440-i2c";
-		reg = <0x12C90000 0x100>;
-		interrupts = <0 59 0>;
-		#address-cells = <1>;
-		#size-cells = <0>;
 		clocks = <&clock 297>;
 		clock-names = "i2c";
 		pinctrl-names = "default";
-- 
1.7.10.4

[PATCH v2 2/8] ARM: dts: exynos5420: add i2c device nodes

[Rahul Sharma]

From: Andrew Bresticker <abrestic@chromium.org>

This adds device-tree nodes for the i2c busses on Exynos
5420 platforms.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 arch/arm/boot/dts/exynos5420.dtsi |   32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 8c54c4b..953f877 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -24,6 +24,10 @@
 		pinctrl2 = &pinctrl_2;
 		pinctrl3 = &pinctrl_3;
 		pinctrl4 = &pinctrl_4;
+		i2c0 = &i2c_0;
+		i2c1 = &i2c_1;
+		i2c2 = &i2c_2;
+		i2c3 = &i2c_3;
 	};
 
 	cpus {
@@ -145,4 +149,32 @@
 		clocks = <&clock 260>, <&clock 131>;
 		clock-names = "uart", "clk_uart_baud0";
 	};
+
+	i2c_0: i2c@12C60000 {
+		clocks = <&clock 261>;
+		clock-names = "i2c";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c0_bus>;
+	};
+
+	i2c_1: i2c@12C70000 {
+		clocks = <&clock 262>;
+		clock-names = "i2c";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c1_bus>;
+	};
+
+	i2c_2: i2c@12C80000 {
+		clocks = <&clock 263>;
+		clock-names = "i2c";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c2_bus>;
+	};
+
+	i2c_3: i2c@12C90000 {
+		clocks = <&clock 264>;
+		clock-names = "i2c";
+		pinctrl-names = "default";
+		pinctrl-0 = <&i2c3_bus>;
+	};
 };
-- 
1.7.10.4

[PATCH v2 3/8] ARM: dts: exynos5250: move common hdmi properties to exynos5 dtsi

[Rahul Sharma]

Hdmi Subsystem nodes shares many properties across exynos5 SoCs
(exynos5250 and exyno5420). Common code is moved to exynos5.dtsi
which is included in exyno5250 and exynos5420 SoC files.

It also renames the hdmi and mixer nodes as per dt naming
convention in the format name@phy_add.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 arch/arm/boot/dts/cros5250-common.dtsi    |    2 +-
 arch/arm/boot/dts/exynos5.dtsi            |   12 ++++++++++++
 arch/arm/boot/dts/exynos5250-arndale.dts  |    7 ++++++-
 arch/arm/boot/dts/exynos5250-smdk5250.dts |    7 ++++++-
 arch/arm/boot/dts/exynos5250-snow.dts     |    8 ++++++++
 arch/arm/boot/dts/exynos5250.dtsi         |    8 ++------
 6 files changed, 35 insertions(+), 9 deletions(-)

diff --git a/arch/arm/boot/dts/cros5250-common.dtsi b/arch/arm/boot/dts/cros5250-common.dtsi
index 3f0239e..abda0b9 100644
--- a/arch/arm/boot/dts/cros5250-common.dtsi
+++ b/arch/arm/boot/dts/cros5250-common.dtsi
@@ -299,7 +299,7 @@
 		status = "disabled";
 	};
 
-	hdmi {
+	hdmi@14530000 {
 		hpd-gpio = <&gpx3 7 0>;
 	};
 
diff --git a/arch/arm/boot/dts/exynos5.dtsi b/arch/arm/boot/dts/exynos5.dtsi
index 1ae179e..dcb4943 100644
--- a/arch/arm/boot/dts/exynos5.dtsi
+++ b/arch/arm/boot/dts/exynos5.dtsi
@@ -144,4 +144,16 @@
 		#size-cells = <0>;
 		status = "disabled";
 	};
+
+	hdmi@14530000 {
+		reg = <0x14530000 0x70000>;
+		interrupts = <0 95 0>;
+		status = "disabled";
+	};
+
+	mixer@14450000 {
+		reg = <0x14450000 0x10000>;
+		interrupts = <0 94 0>;
+		status = "disabled";
+	};
 };
diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts
index 5c7dd6d..c18c346 100644
--- a/arch/arm/boot/dts/exynos5250-arndale.dts
+++ b/arch/arm/boot/dts/exynos5250-arndale.dts
@@ -423,13 +423,18 @@
 		};
 	};
 
-	hdmi {
+	hdmi@14530000 {
+		status = "okay";
 		hpd-gpio = <&gpx3 7 2>;
 		vdd_osc-supply = <&ldo10_reg>;
 		vdd_pll-supply = <&ldo8_reg>;
 		vdd-supply = <&ldo8_reg>;
 	};
 
+	mixer@14450000 {
+		status = "okay";
+	};
+
 	mmc_reg: voltage-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "VDD_33ON_2.8V";
diff --git a/arch/arm/boot/dts/exynos5250-smdk5250.dts b/arch/arm/boot/dts/exynos5250-smdk5250.dts
index d3da369..c1b8b7f 100644
--- a/arch/arm/boot/dts/exynos5250-smdk5250.dts
+++ b/arch/arm/boot/dts/exynos5250-smdk5250.dts
@@ -221,10 +221,15 @@
 		status = "disabled";
 	};
 
-	hdmi {
+	hdmi@14530000 {
+		status = "okay";
 		hpd-gpio = <&gpx3 7 0>;
 	};
 
+	mixer@14450000 {
+		status = "okay";
+	};
+
 	codec@11000000 {
 		samsung,mfc-r = <0x43000000 0x800000>;
 		samsung,mfc-l = <0x51000000 0x800000>;
diff --git a/arch/arm/boot/dts/exynos5250-snow.dts b/arch/arm/boot/dts/exynos5250-snow.dts
index e79331d..b1378af 100644
--- a/arch/arm/boot/dts/exynos5250-snow.dts
+++ b/arch/arm/boot/dts/exynos5250-snow.dts
@@ -196,4 +196,12 @@
 			clock-frequency = <24000000>;
 		};
 	};
+
+	hdmi@14530000 {
+		status = "okay";
+	};
+
+	mixer@14450000 {
+		status = "okay";
+	};
 };
diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
index baf6f88..0fdbe55 100644
--- a/arch/arm/boot/dts/exynos5250.dtsi
+++ b/arch/arm/boot/dts/exynos5250.dtsi
@@ -578,20 +578,16 @@
 		clock-names = "gscl";
 	};
 
-	hdmi {
+	hdmi@14530000 {
 		compatible = "samsung,exynos5-hdmi";
-		reg = <0x14530000 0x70000>;
-		interrupts = <0 95 0>;
 		clocks = <&clock 333>, <&clock 136>, <&clock 137>,
 				<&clock 333>, <&clock 333>;
 		clock-names = "hdmi", "sclk_hdmi", "sclk_pixel",
 				"sclk_hdmiphy", "hdmiphy";
 	};
 
-	mixer {
+	mixer@14450000 {
 		compatible = "samsung,exynos5-mixer";
-		reg = <0x14450000 0x10000>;
-		interrupts = <0 94 0>;
 	};
 
 	dp-controller {
-- 
1.7.10.4

[PATCH v2 4/8] ARM: dts: exynos5420: add dt nodes for hdmi subsystem

[Rahul Sharma]

Add hdmi, mixer, ddc device tree nodes for Exynos 5420 SoC.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 arch/arm/boot/dts/exynos5420-smdk5420.dts |   20 ++++++++++++++++++++
 arch/arm/boot/dts/exynos5420.dtsi         |    8 ++++++++
 2 files changed, 28 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420-smdk5420.dts b/arch/arm/boot/dts/exynos5420-smdk5420.dts
index 08607df..fcd0f69 100644
--- a/arch/arm/boot/dts/exynos5420-smdk5420.dts
+++ b/arch/arm/boot/dts/exynos5420-smdk5420.dts
@@ -30,4 +30,24 @@
 			clock-frequency = <24000000>;
 		};
 	};
+
+	hdmi@14530000 {
+		status = "okay";
+		hpd-gpio = <&gpx3 7 0>;
+	};
+
+	mixer@14450000 {
+		status = "okay";
+	};
+
+	i2c_2: i2c@12C80000 {
+		samsung,i2c-sda-delay = <100>;
+		samsung,i2c-max-bus-freq = <66000>;
+		status = "okay";
+
+		hdmiddc@50 {
+			compatible = "samsung,exynos4210-hdmiddc";
+			reg = <0x50>;
+		};
+	};
 };
diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 953f877..93caef7 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -177,4 +177,12 @@
 		pinctrl-names = "default";
 		pinctrl-0 = <&i2c3_bus>;
 	};
+
+	hdmi@14530000 {
+		compatible = "samsung,exynos4212-hdmi";
+	};
+
+	mixer@14450000 {
+		compatible = "samsung,exynos5420-mixer";
+	};
 };
-- 
1.7.10.4

[PATCH v2 5/8] ARM: dts: exynos5420: add clocks for hdmi subsystem

[Rahul Sharma]

Add clocks for hdmi and mixer for exynos5420 SoC.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 arch/arm/boot/dts/exynos5420.dtsi |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 93caef7..5fa4093 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -180,9 +180,15 @@
 
 	hdmi@14530000 {
 		compatible = "samsung,exynos4212-hdmi";
+		clocks = <&clock 413>, <&clock 143>, <&clock 144>,
+			<&clock 158>, <&clock 1024>;
+		clock-names = "hdmi", "sclk_hdmi", "sclk_pixel",
+			"sclk_hdmiphy", "mout_hdmi";
 	};
 
 	mixer@14450000 {
 		compatible = "samsung,exynos5420-mixer";
+		clocks = <&clock 431>, <&clock 143>;
+		clock-names = "mixer", "sclk_hdmi";
 	};
 };
-- 
1.7.10.4

[PATCH v2 6/8] ARM: dts: exynos5420: add hdmi hpd gpio pinctrl node

[Rahul Sharma]

Add pinctrl node for hdmi-hpd gpio pin to exynos5420
device tree files.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 arch/arm/boot/dts/exynos5420-smdk5420.dts |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5420-smdk5420.dts b/arch/arm/boot/dts/exynos5420-smdk5420.dts
index fcd0f69..0f98eab 100644
--- a/arch/arm/boot/dts/exynos5420-smdk5420.dts
+++ b/arch/arm/boot/dts/exynos5420-smdk5420.dts
@@ -31,9 +31,20 @@
 		};
 	};
 
+	pinctrl@13400000 {
+		hdmi_hpd_irq: hdmi-hpd-irq {
+			samsung,pins = "gpx3-7";
+			samsung,pin-function = <0>;
+			samsung,pin-pud = <1>;
+			samsung,pin-drv = <0>;
+		};
+	};
+
 	hdmi@14530000 {
 		status = "okay";
 		hpd-gpio = <&gpx3 7 0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&hdmi_hpd_irq>;
 	};
 
 	mixer@14450000 {
-- 
1.7.10.4

[PATCH v2 7/8] of/documentation: Update hpd gpio property for exynos_hdmi

[Rahul Sharma]

From: Sachin Kamat <sachin.kamat@linaro.org>

Exynos SoCs use pinctrl to configure GPIOs. Update the document
to reflect this change.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 Documentation/devicetree/bindings/video/exynos_hdmi.txt |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/video/exynos_hdmi.txt b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
index 589edee..584385a 100644
--- a/Documentation/devicetree/bindings/video/exynos_hdmi.txt
+++ b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
@@ -8,9 +8,7 @@ Required properties:
 - hpd-gpio: following information about the hotplug gpio pin.
 	a) phandle of the gpio controller node.
 	b) pin number within the gpio controller.
-	c) pin function mode.
-	d) optional flags and pull up/down.
-	e) drive strength.
+	c) optional flags and pull up/down.
 
 Example:
 
@@ -18,5 +16,5 @@ Example:
 		compatible = "samsung,exynos5-hdmi";
 		reg = <0x14530000 0x100000>;
 		interrupts = <0 95 0>;
-		hpd-gpio = <&gpx3 7 0xf 1 3>;
+		hpd-gpio = <&gpx3 7 1>;
 	};
-- 
1.7.10.4

[PATCH v2 8/8] of/documentation: update with clock information for exynos hdmi subsystem

[Rahul Sharma]

Adding information about clocks to the binding documentation
for exynos mixer and hdmi.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
 Documentation/devicetree/bindings/video/exynos_hdmi.txt  |   14 +++++++++++++-
 Documentation/devicetree/bindings/video/exynos_mixer.txt |    4 ++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/video/exynos_hdmi.txt b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
index 584385a..827e64b 100644
--- a/Documentation/devicetree/bindings/video/exynos_hdmi.txt
+++ b/Documentation/devicetree/bindings/video/exynos_hdmi.txt
@@ -9,7 +9,19 @@ Required properties:
 	a) phandle of the gpio controller node.
 	b) pin number within the gpio controller.
 	c) optional flags and pull up/down.
-
+- clocks: list of clock IDs from SoC clock driver.
+	a) hdmi: It is required for gate operation on aclk_200_disp1 clock
+		which clocks the display1 block.
+	b) sclk_hdmi: It is required for gate operation on sclk_hdmi clock
+		which clocks hdmi IP.
+	c) sclk_pixel: Parent for mux mout_hdmi.
+	d) sclk_hdmiphy: Parent for mux mout_hdmi.
+	e) mout_hdmi: It is required by the driver to switch between the 2
+		parents i.e. sclk_pixel and sclk_hdmiphy. If hdmiphy is stable
+		after configuration, parent is set to sclk_hdmiphy else
+		sclk_pixel.
+- clock-names: aliases as per driver requirements for above clock IDs:
+	"hdmi", "sclk_hdmi", "sclk_pixel", "sclk_hdmiphy" and "mout_hdmi".
 Example:
 
 	hdmi {
diff --git a/Documentation/devicetree/bindings/video/exynos_mixer.txt b/Documentation/devicetree/bindings/video/exynos_mixer.txt
index 9b2ea03..54790a2 100644
--- a/Documentation/devicetree/bindings/video/exynos_mixer.txt
+++ b/Documentation/devicetree/bindings/video/exynos_mixer.txt
@@ -5,6 +5,10 @@ Required properties:
 - reg: physical base address of the mixer and length of memory mapped
 	region.
 - interrupts: interrupt number to the cpu.
+- clocks: list of clock IDs from SoC clock driver.
+	a) mixer: It is required for gate operation on aclk_200_disp1 clock
+		which clocks the display1 block.
+	b) sclk_hdmi: Parent for mux mout_mixer.
 
 Example:
 
-- 
1.7.10.4