On 3/6/25 11:56, Cheick Traore wrote:
> 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>
> ---
>
> 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;
Reviewed-by: Patrice Chotard <patrice.chot...@foss.st.com>
Thanks
Patrice
