ARM: dts: s3c24xx: override nodes by label

Using full paths to extend or override a device tree node is error
prone.  If there was a typo error, a new node will be created instead of
extending the existing node.  This will lead to run-time errors that
could be hard to detect.

A mistyped label on the other hand, will cause a dtc compile error
(during build time).
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20200907183313.29234-9-krzk@kernel.org

arch/arm/boot/dts/s3c2416.dtsi

@@ -23,49 +23,12 @@ cpu {
 		};
 	};
 
-	interrupt-controller@4a000000 {
-		compatible = "samsung,s3c2416-irq";
-	};
-
 	clocks: clock-controller@4c000000 {
 		compatible = "samsung,s3c2416-clock";
 		reg = <0x4c000000 0x40>;
 		#clock-cells = <1>;
 	};
 
-	pinctrl@56000000 {
-		compatible = "samsung,s3c2416-pinctrl";
-	};
-
-	timer@51000000 {
-		clocks = <&clocks PCLK_PWM>;
-		clock-names = "timers";
-	};
-
-	uart_0: serial@50000000 {
-		compatible = "samsung,s3c2440-uart";
-		clock-names = "uart", "clk_uart_baud2",
-				"clk_uart_baud3";
-		clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>,
-				<&clocks SCLK_UART>;
-	};
-
-	uart_1: serial@50004000 {
-		compatible = "samsung,s3c2440-uart";
-		clock-names = "uart", "clk_uart_baud2",
-				"clk_uart_baud3";
-		clocks = <&clocks PCLK_UART1>, <&clocks PCLK_UART1>,
-				<&clocks SCLK_UART>;
-	};
-
-	uart_2: serial@50008000 {
-		compatible = "samsung,s3c2440-uart";
-		clock-names = "uart", "clk_uart_baud2",
-				"clk_uart_baud3";
-		clocks = <&clocks PCLK_UART2>, <&clocks PCLK_UART2>,
-				<&clocks SCLK_UART>;
-	};
-
 	uart_3: serial@5000c000 {
 		compatible = "samsung,s3c2440-uart";
 		reg = <0x5000C000 0x4000>;
@@ -98,22 +61,59 @@ sdhci_0: sdhci@4a800000 {
 				<&clocks MUX_HSMMC1>;
 		status = "disabled";
 	};
+};
 
-	watchdog: watchdog@53000000 {
-		interrupts = <1 9 27 3>;
-		clocks = <&clocks PCLK_WDT>;
-		clock-names = "watchdog";
-	};
+&i2c {
+	compatible = "samsung,s3c2440-i2c";
+	clocks = <&clocks PCLK_I2C0>;
+	clock-names = "i2c";
+};
 
-	rtc: rtc@57000000 {
-		compatible = "samsung,s3c2416-rtc";
-		clocks = <&clocks PCLK_RTC>;
-		clock-names = "rtc";
-	};
+&intc {
+	compatible = "samsung,s3c2416-irq";
+};
 
-	i2c@54000000 {
-		compatible = "samsung,s3c2440-i2c";
-		clocks = <&clocks PCLK_I2C0>;
-		clock-names = "i2c";
-	};
+&pinctrl_0 {
+	compatible = "samsung,s3c2416-pinctrl";
+};
+
+&rtc {
+	compatible = "samsung,s3c2416-rtc";
+	clocks = <&clocks PCLK_RTC>;
+	clock-names = "rtc";
+};
+
+&timer {
+	clocks = <&clocks PCLK_PWM>;
+	clock-names = "timers";
+};
+
+&uart_0 {
+	compatible = "samsung,s3c2440-uart";
+	clock-names = "uart", "clk_uart_baud2",
+			"clk_uart_baud3";
+	clocks = <&clocks PCLK_UART0>, <&clocks PCLK_UART0>,
+			<&clocks SCLK_UART>;
+};
+
+&uart_1 {
+	compatible = "samsung,s3c2440-uart";
+	clock-names = "uart", "clk_uart_baud2",
+			"clk_uart_baud3";
+	clocks = <&clocks PCLK_UART1>, <&clocks PCLK_UART1>,
+			<&clocks SCLK_UART>;
+};
+
+&uart_2 {
+	compatible = "samsung,s3c2440-uart";
+	clock-names = "uart", "clk_uart_baud2",
+			"clk_uart_baud3";
+	clocks = <&clocks PCLK_UART2>, <&clocks PCLK_UART2>,
+			<&clocks SCLK_UART>;
+};
+
+&watchdog {
+	interrupts = <1 9 27 3>;
+	clocks = <&clocks PCLK_WDT>;
+	clock-names = "watchdog";
 };

arch/arm/boot/dts/s3c24xx.dtsi

@@ -13,12 +13,12 @@ / {
 
 	aliases {
 		pinctrl0 = &pinctrl_0;
-		serial0 = &uart0;
-		serial1 = &uart1;
-		serial2 = &uart2;
+		serial0 = &uart_0;
+		serial1 = &uart_1;
+		serial2 = &uart_2;
 	};
 
-	intc:interrupt-controller@4a000000 {
+	intc: interrupt-controller@4a000000 {
 		compatible = "samsung,s3c2410-irq";
 		reg = <0x4a000000 0x100>;
 		interrupt-controller;
@@ -39,49 +39,49 @@ wakeup-interrupt-controller {
 		};
 	};
 
-	timer@51000000 {
+	timer: timer@51000000 {
 		compatible = "samsung,s3c2410-pwm";
 		reg = <0x51000000 0x1000>;
 		interrupts = <0 0 10 3>, <0 0 11 3>, <0 0 12 3>, <0 0 13 3>, <0 0 14 3>;
 		#pwm-cells = <3>;
 	};
 
-	uart0: serial@50000000 {
+	uart_0: serial@50000000 {
 		compatible = "samsung,s3c2410-uart";
 		reg = <0x50000000 0x4000>;
 		interrupts = <1 28 0 4>, <1 28 1 4>;
 		status = "disabled";
 	};
 
-	uart1: serial@50004000 {
+	uart_1: serial@50004000 {
 		compatible = "samsung,s3c2410-uart";
 		reg = <0x50004000 0x4000>;
 		interrupts = <1 23 3 4>, <1 23 4 4>;
 		status = "disabled";
 	};
 
-	uart2: serial@50008000 {
+	uart_2: serial@50008000 {
 		compatible = "samsung,s3c2410-uart";
 		reg = <0x50008000 0x4000>;
 		interrupts = <1 15 6 4>, <1 15 7 4>;
 		status = "disabled";
 	};
 
-	watchdog@53000000 {
+	watchdog: watchdog@53000000 {
 		compatible = "samsung,s3c2410-wdt";
 		reg = <0x53000000 0x100>;
 		interrupts = <0 0 9 3>;
 		status = "disabled";
 	};
 
-	rtc@57000000 {
+	rtc: rtc@57000000 {
 		compatible = "samsung,s3c2410-rtc";
 		reg = <0x57000000 0x100>;
 		interrupts = <0 0 30 3>, <0 0 8 3>;
 		status = "disabled";
 	};
 
-	i2c@54000000 {
+	i2c: i2c@54000000 {
 		compatible = "samsung,s3c2410-i2c";
 		reg = <0x54000000 0x100>;
 		interrupts = <0 0 27 3>;