[PATCH 14/17] arm64: dts: exynos7: add specific compatibles to several blocks

[Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>]

Exynos7 reuses several devices from older designs, thus historically
we kept the old (block's) compatible only.  This works fine and there is
no bug here, however guidelines expressed in
Documentation/devicetree/bindings/writing-bindings.rst state that:
1. Compatibles should be specific.
2. We should add new compatibles in case of bugs or features.

Add compatibles specific to Exynos7 in front of all old-SoC-like
compatibles.  This will also help reviews of new code using existing
DTS as template.  No functional impact on Linux drivers behavior.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
---
 arch/arm64/boot/dts/exynos/exynos7.dtsi | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/exynos/exynos7.dtsi b/arch/arm64/boot/dts/exynos/exynos7.dtsi
index 6ed80ddf3369..9cb6bd61262e 100644
--- a/arch/arm64/boot/dts/exynos/exynos7.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7.dtsi
@@ -128,7 +128,8 @@ soc: soc@0 {
 		ranges = <0 0 0 0x18000000>;
 
 		chipid@10000000 {
-			compatible = "samsung,exynos4210-chipid";
+			compatible = "samsung,exynos7-chipid",
+				     "samsung,exynos4210-chipid";
 			reg = <0x10000000 0x100>;
 		};
 
@@ -279,7 +280,7 @@ clock_fsys1: clock-controller@156e0000 {
 		};
 
 		serial_0: serial@13630000 {
-			compatible = "samsung,exynos4210-uart";
+			compatible = "samsung,exynos7-uart", "samsung,exynos4210-uart";
 			reg = <0x13630000 0x100>;
 			interrupts = <GIC_SPI 440 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clock_peric0 PCLK_UART0>,
@@ -289,7 +290,7 @@ serial_0: serial@13630000 {
 		};
 
 		serial_1: serial@14c20000 {
-			compatible = "samsung,exynos4210-uart";
+			compatible = "samsung,exynos7-uart", "samsung,exynos4210-uart";
 			reg = <0x14c20000 0x100>;
 			interrupts = <GIC_SPI 456 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clock_peric1 PCLK_UART1>,
@@ -299,7 +300,7 @@ serial_1: serial@14c20000 {
 		};
 
 		serial_2: serial@14c30000 {
-			compatible = "samsung,exynos4210-uart";
+			compatible = "samsung,exynos7-uart", "samsung,exynos4210-uart";
 			reg = <0x14c30000 0x100>;
 			interrupts = <GIC_SPI 457 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clock_peric1 PCLK_UART2>,
@@ -309,7 +310,7 @@ serial_2: serial@14c30000 {
 		};
 
 		serial_3: serial@14c40000 {
-			compatible = "samsung,exynos4210-uart";
+			compatible = "samsung,exynos7-uart", "samsung,exynos4210-uart";
 			reg = <0x14c40000 0x100>;
 			interrupts = <GIC_SPI 458 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&clock_peric1 PCLK_UART3>,
@@ -539,7 +540,7 @@ pmu_system_controller: system-controller@105c0000 {
 		};
 
 		rtc: rtc@10590000 {
-			compatible = "samsung,s3c6410-rtc";
+			compatible = "samsung,exynos7-rtc", "samsung,s3c6410-rtc";
 			reg = <0x10590000 0x100>;
 			interrupts = <GIC_SPI 355 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 356 IRQ_TYPE_LEVEL_HIGH>;
@@ -559,7 +560,8 @@ watchdog: watchdog@101d0000 {
 		};
 
 		gpu: gpu@14ac0000 {
-			compatible = "samsung,exynos5433-mali", "arm,mali-t760";
+			compatible = "samsung,exynos7-mali",
+				     "samsung,exynos5433-mali", "arm,mali-t760";
 			reg = <0x14ac0000 0x5000>;
 			interrupts = <GIC_SPI 241 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 242 IRQ_TYPE_LEVEL_HIGH>,
@@ -619,7 +621,7 @@ adc: adc@13620000 {
 		};
 
 		pwm: pwm@136c0000 {
-			compatible = "samsung,exynos4210-pwm";
+			compatible = "samsung,exynos7-pwm", "samsung,exynos4210-pwm";
 			reg = <0x136c0000 0x100>;
 			interrupts = <GIC_SPI 449 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 450 IRQ_TYPE_LEVEL_HIGH>,
-- 
2.34.1