ARM: dts: stm32: add pinctrl and disabled spi5 node in stm32mp135f-dk

Add pinctrl information and a disabled spi5 node within
stm32mp135f-dk.dts in order to use the spi5 bus which is
available via the GPIO expansion pins of the STM32MP135 Discovery board.
Signed-off-by: Alain Volmat <alain.volmat@foss.st.com>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

arch/arm/boot/dts/stm32mp13-pinctrl.dtsi

@@ -142,6 +142,29 @@ pins {
 		};
 	};
 
+	spi5_pins_a: spi5-0 {
+		pins1 {
+			pinmux = <STM32_PINMUX('H', 7, AF6)>, /* SPI5_SCK */
+				 <STM32_PINMUX('H', 3, AF5)>; /* SPI5_MOSI */
+			bias-disable;
+			drive-push-pull;
+			slew-rate = <1>;
+		};
+
+		pins2 {
+			pinmux = <STM32_PINMUX('A', 8, AF5)>; /* SPI5_MISO */
+			bias-disable;
+		};
+	};
+
+	spi5_sleep_pins_a: spi5-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('H', 7, ANALOG)>, /* SPI5_SCK */
+				 <STM32_PINMUX('A', 8, ANALOG)>, /* SPI5_MISO */
+				 <STM32_PINMUX('H', 3, ANALOG)>; /* SPI5_MOSI */
+		};
+	};
+
 	uart4_pins_a: uart4-0 {
 		pins1 {
 			pinmux = <STM32_PINMUX('D', 6, AF8)>; /* UART4_TX */

arch/arm/boot/dts/stm32mp135f-dk.dts

@@ -116,6 +116,13 @@ &sdmmc1 {
 	status = "okay";
 };
 
+&spi5 {
+	pinctrl-names = "default", "sleep";
+	pinctrl-0 = <&spi5_pins_a>;
+	pinctrl-1 = <&spi5_sleep_pins_a>;
+	status = "disabled";
+};
+
 &uart4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart4_pins_a>;