[PATCH] ARM: dts: exynos5420: add mali dt bindings and enable mali on Odroid XU3/4

[Marian Mihailescu <mihailescu2m@gmail.com>]

From: memeka <mihailescu2m@gmail.com>

Add device tree bindings and nodes for Mali GPU for Exynos 542x SoC.
GPU is disabled by default, and is enabled for each board after the regulator
is defined. Tested on Odroid-XU4.

Changes since v1:
- used generic node and label for GPU
- added bindings for compatible
- fixed irq indentation
- fixed interrupt-names to match bindings
- added cooling cells for future TMU connection
- used generic node and label for GPU opp table
- removed always-on from SoC GPU regulator

Signed-off-by: Marian Mihailescu <mihailescu2m@gmail.com>
---
 .../devicetree/bindings/gpu/arm,mali-midgard.yaml  |  5 ++-
 arch/arm/boot/dts/exynos5420.dtsi                  | 50 ++++++++++++++++++++++
 arch/arm/boot/dts/exynos5422-odroid-core.dtsi      |  6 ++-
 3 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
index 47bc1ac36426..e8868cb587de 100644
--- a/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
+++ b/Documentation/devicetree/bindings/gpu/arm,mali-midgard.yaml
@@ -38,9 +38,12 @@ properties:
           - enum:
              - samsung,exynos5433-mali
           - const: arm,mali-t760
+      - items:
+          - enum:
+             - samsung,exynis5420-mali
+          - const: arm,mali-t628
 
           # "arm,mali-t624"
-          # "arm,mali-t628"
           # "arm,mali-t830"
           # "arm,mali-t880"
 
diff --git a/arch/arm/boot/dts/exynos5420.dtsi b/arch/arm/boot/dts/exynos5420.dtsi
index 7d51e0f4ab79..31b5f7ba0e3b 100644
--- a/arch/arm/boot/dts/exynos5420.dtsi
+++ b/arch/arm/boot/dts/exynos5420.dtsi
@@ -670,6 +670,56 @@
 			iommus = <&sysmmu_gscl1>;
 		};
 
+		gpu: gpu@11800000 {
+			compatible = "samsung,exynos5422-mali", "arm,mali-t628";
+			reg = <0x11800000 0x5000>;
+			interrupts = <GIC_SPI 219 IRQ_TYPE_LEVEL_HIGH>,
+			             <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>,
+			             <GIC_SPI 117 IRQ_TYPE_LEVEL_HIGH>;
+			interrupt-names = "job", "mmu", "gpu";
+
+			clocks = <&clock CLK_G3D>;
+			clock-names = "core";
+			power-domains = <&g3d_pd>;
+			operating-points-v2 = <&gpu_opp_table>;
+
+			status = "disabled";
+			#cooling-cells = <2>;
+
+			gpu_opp_table: opp-table {
+				compatible = "operating-points-v2";
+
+				opp@177000000 {
+					opp-hz = /bits/ 64 <177000000>;
+					opp-microvolt = <812500>;
+				};
+				opp@266000000 {
+					opp-hz = /bits/ 64 <266000000>;
+					opp-microvolt = <862500>;
+				};
+				opp@350000000 {
+					opp-hz = /bits/ 64 <350000000>;
+					opp-microvolt = <912500>;
+				};
+				opp-420000000 {
+					opp-hz = /bits/ 64 <420000000>;
+					opp-microvolt = <962500>;
+				};
+				opp-480000000 {
+					opp-hz = /bits/ 64 <480000000>;
+					opp-microvolt = <1000000>;
+				};
+				opp-543000000 {
+					opp-hz = /bits/ 64 <543000000>;
+					opp-microvolt = <1037500>;
+				};
+				opp-600000000 {
+					opp-hz = /bits/ 64 <600000000>;
+					opp-microvolt = <1150000>;
+				};
+			};
+		};
+
 		scaler_0: scaler@12800000 {
 			compatible = "samsung,exynos5420-scaler";
 			reg = <0x12800000 0x1294>;
diff --git a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
index 422692b20c46..ce774f7b2ce0 100644
--- a/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
+++ b/arch/arm/boot/dts/exynos5422-odroid-core.dtsi
@@ -522,7 +522,6 @@
 				regulator-name = "vdd_g3d";
 				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <1400000>;
-				regulator-always-on;
 				regulator-boot-on;
 
 				regulator-state-mem {
@@ -659,6 +658,11 @@
 	status = "okay";
 };
 
+&gpu {
+	mali-supply = <&buck4_reg>;
+	status = "okay";
+};
+
 &rtc {
 	status = "okay";
 	clocks = <&clock CLK_RTC>, <&s2mps11_osc S2MPS11_CLK_AP>;
-- 
2.14.1