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.tra...@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chot...@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
