[RFC 5/5] [HACK] PWM testing

[Biju Das <biju.das.jz@xxxxxxxxxxxxxx>]

Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
 .../boot/dts/renesas/rzg2l-smarc-pinfunction.dtsi  |  5 +++++
 arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi       | 14 ++++++++++++++
 arch/arm64/configs/defconfig                       |  1 +
 arch/arm64/configs/renesas_defconfig               |  1 +
 4 files changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc-pinfunction.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc-pinfunction.dtsi
index 9085d8c76ce1..55442c359b74 100644
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc-pinfunction.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc-pinfunction.dtsi
@@ -38,6 +38,11 @@ can1-stb-hog {
 		line-name = "can1_stb";
 	};
 
+	gpt4_pins: gpt {
+		pinmux = <RZG2L_PORT_PINMUX(43, 0, 2)>, /* GTIOC4A */
+			 <RZG2L_PORT_PINMUX(43, 1, 2)>; /* GTIOC4B */
+	};
+
 	i2c0_pins: i2c0 {
 		pins = "RIIC0_SDA", "RIIC0_SCL";
 		input-enable;
diff --git a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
index aadc41515093..2f9212def887 100644
--- a/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
+++ b/arch/arm64/boot/dts/renesas/rzg2l-smarc.dtsi
@@ -16,6 +16,20 @@ aliases {
 		serial1 = &scif2;
 		i2c3 = &i2c3;
 	};
+#if 0
+	backlight {
+		compatible = "pwm-backlight";
+		pwms = <&gpt4 0 500000000>;
+		brightness-levels = <0 2 8 16 32 64 128 255>;
+		default-brightness-level = <6>;
+	};
+#endif
+};
+
+&gpt4 {
+	pinctrl-0 = <&gpt4_pins>;
+	pinctrl-names = "default";
+	status = "okay";
 };
 
 &i2c3 {
diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 2836f3c5d361..b8c1b2115e36 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1139,6 +1139,7 @@ CONFIG_PWM_MTK_DISP=m
 CONFIG_PWM_MEDIATEK=m
 CONFIG_PWM_RCAR=m
 CONFIG_PWM_RENESAS_TPU=m
+CONFIG_PWM_RZG2L_GPT=m
 CONFIG_PWM_ROCKCHIP=y
 CONFIG_PWM_SAMSUNG=y
 CONFIG_PWM_SL28CPLD=m
diff --git a/arch/arm64/configs/renesas_defconfig b/arch/arm64/configs/renesas_defconfig
index 8702f71b2e20..f86f5ab472da 100644
--- a/arch/arm64/configs/renesas_defconfig
+++ b/arch/arm64/configs/renesas_defconfig
@@ -354,6 +354,7 @@ CONFIG_RZG2L_ADC=y
 CONFIG_PWM=y
 CONFIG_PWM_RCAR=y
 CONFIG_PWM_RENESAS_TPU=y
+CONFIG_PWM_RZG2L_GPT=y
 CONFIG_RESET_RZG2L_USBPHY_CTRL=y
 CONFIG_PHY_RCAR_GEN3_PCIE=y
 CONFIG_PHY_RCAR_GEN3_USB2=y
-- 
2.25.1