[PATCH v2 4/4] ARM: dts: stm32: Add TIMERS inverted PWM channel 3 on STM32MP135F-DK

[Cheick Traore]

The pwm source TIM1_CH3N channel (on PE12) in inverted polarity mode
will be used to manage the brightness of the panel backlight on
STM32MP135F-DK.

Signed-off-by: Cheick Traore <cheick.traore at foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard at foss.st.com>
---

(no changes since v1)

 arch/arm/dts/stm32mp13-pinctrl.dtsi | 15 +++++++++++++++
 arch/arm/dts/stm32mp135f-dk.dts     | 14 ++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/arch/arm/dts/stm32mp13-pinctrl.dtsi b/arch/arm/dts/stm32mp13-pinctrl.dtsi
index c01d39f03ea..52c2a9f24d7 100644
--- a/arch/arm/dts/stm32mp13-pinctrl.dtsi
+++ b/arch/arm/dts/stm32mp13-pinctrl.dtsi
@@ -215,6 +215,21 @@
 		};
 	};
 
+	pwm1_ch3n_pins_a: pwm1-ch3n-0 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 12, AF1)>; /* TIM1_CH3N */
+			bias-pull-down;
+			drive-push-pull;
+			slew-rate = <0>;
+		};
+	};
+
+	pwm1_ch3n_sleep_pins_a: pwm1-ch3n-sleep-0 {
+		pins {
+			pinmux = <STM32_PINMUX('E', 12, ANALOG)>; /* TIM1_CH3N */
+		};
+	};
+
 	pwm3_pins_a: pwm3-0 {
 		pins {
 			pinmux = <STM32_PINMUX('B', 1, AF2)>; /* TIM3_CH4 */
diff --git a/arch/arm/dts/stm32mp135f-dk.dts b/arch/arm/dts/stm32mp135f-dk.dts
index eea740d097c..275823da3c6 100644
--- a/arch/arm/dts/stm32mp135f-dk.dts
+++ b/arch/arm/dts/stm32mp135f-dk.dts
@@ -9,6 +9,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/leds/common.h>
+#include <dt-bindings/pwm/pwm.h>
 #include <dt-bindings/regulator/st,stm32mp13-regulator.h>
 #include "stm32mp135.dtsi"
 #include "stm32mp13xf.dtsi"
@@ -207,6 +208,19 @@
 	status = "disabled";
 };
 
+&timers1 {
+	/* spare dmas for other usage */
+	/delete-property/dmas;
+	/delete-property/dma-names;
+	status = "okay";
+	pwm1: pwm {
+		pinctrl-0 = <&pwm1_ch3n_pins_a>;
+		pinctrl-1 = <&pwm1_ch3n_sleep_pins_a>;
+		pinctrl-names = "default", "sleep";
+		status = "okay";
+	};
+};
+
 &timers3 {
 	/delete-property/dmas;
 	/delete-property/dma-names;
-- 
2.34.1