arm64: dts: st: add low-power timer nodes on stm32mp251

Add low-power timer (LPTimer) support on STM32MP25 SoC.
The full feature set is implemented in LPTIM1/2/3/4. LPTIM5 supports a
smaller set of features (no capture/compare) channel. Still, LPTIM5 can
be used as single PWM, counter, trigger or timer.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Link: https://lore.kernel.org/r/20250429125133.1574167-7-fabrice.gasnier@foss.st.com
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>

1 files changed, 177 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index bb95d61ff7b5..ec1285cd805e 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -292,6 +292,78 @@
 			#access-controller-cells = <1>;
 			ranges;
 
+			lptimer1: timer@40090000 {
+				compatible = "st,stm32mp25-lptimer", "st,stm32-lptimer";
+				reg = <0x40090000 0x400>;
+				interrupts-extended = <&exti1 47 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_KER_LPTIM1>;
+				clock-names = "mux";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				access-controllers = <&rifsc 17>;
+				power-domains = <&RET_PD>;
+				wakeup-source;
+				status = "disabled";
+
+				counter {
+					compatible = "st,stm32mp25-lptimer-counter", "st,stm32-lptimer-counter";
+					status = "disabled";
+				};
+
+				pwm {
+					compatible = "st,stm32mp25-pwm-lp", "st,stm32-pwm-lp";
+					#pwm-cells = <3>;
+					status = "disabled";
+				};
+
+				timer {
+					compatible = "st,stm32mp25-lptimer-timer", "st,stm32-lptimer-timer";
+					status = "disabled";
+				};
+
+				trigger@0 {
+					compatible = "st,stm32mp25-lptimer-trigger", "st,stm32-lptimer-trigger";
+					reg = <0>;
+					status = "disabled";
+				};
+			};
+
+			lptimer2: timer@400a0000 {
+				compatible = "st,stm32mp25-lptimer", "st,stm32-lptimer";
+				reg = <0x400a0000 0x400>;
+				interrupts-extended = <&exti1 48 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_KER_LPTIM2>;
+				clock-names = "mux";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				access-controllers = <&rifsc 18>;
+				power-domains = <&RET_PD>;
+				wakeup-source;
+				status = "disabled";
+
+				counter {
+					compatible = "st,stm32mp25-lptimer-counter", "st,stm32-lptimer-counter";
+					status = "disabled";
+				};
+
+				pwm {
+					compatible = "st,stm32mp25-pwm-lp", "st,stm32-pwm-lp";
+					#pwm-cells = <3>;
+					status = "disabled";
+				};
+
+				timer {
+					compatible = "st,stm32mp25-lptimer-timer", "st,stm32-lptimer-timer";
+					status = "disabled";
+				};
+
+				trigger@1 {
+					compatible = "st,stm32mp25-lptimer-trigger", "st,stm32-lptimer-trigger";
+					reg = <1>;
+					status = "disabled";
+				};
+			};
+
 			i2s2: audio-controller@400b0000 {
 				compatible = "st,stm32mp25-i2s";
 				reg = <0x400b0000 0x400>;
@@ -853,6 +925,111 @@
 				status = "disabled";
 			};
 
+			lptimer3: timer@46050000 {
+				compatible = "st,stm32mp25-lptimer", "st,stm32-lptimer";
+				reg = <0x46050000 0x400>;
+				interrupts-extended = <&exti2 29 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_KER_LPTIM3>;
+				clock-names = "mux";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				access-controllers = <&rifsc 19>;
+				wakeup-source;
+				status = "disabled";
+
+				counter {
+					compatible = "st,stm32mp25-lptimer-counter", "st,stm32-lptimer-counter";
+					status = "disabled";
+				};
+
+				pwm {
+					compatible = "st,stm32mp25-pwm-lp", "st,stm32-pwm-lp";
+					#pwm-cells = <3>;
+					status = "disabled";
+				};
+
+				timer {
+					compatible = "st,stm32mp25-lptimer-timer", "st,stm32-lptimer-timer";
+					status = "disabled";
+				};
+
+				trigger@2 {
+					compatible = "st,stm32mp25-lptimer-trigger", "st,stm32-lptimer-trigger";
+					reg = <2>;
+					status = "disabled";
+				};
+			};
+
+			lptimer4: timer@46060000 {
+				compatible = "st,stm32mp25-lptimer", "st,stm32-lptimer";
+				reg = <0x46060000 0x400>;
+				interrupts-extended = <&exti2 30 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_KER_LPTIM4>;
+				clock-names = "mux";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				access-controllers = <&rifsc 20>;
+				wakeup-source;
+				status = "disabled";
+
+				counter {
+					compatible = "st,stm32mp25-lptimer-counter", "st,stm32-lptimer-counter";
+					status = "disabled";
+				};
+
+				pwm {
+					compatible = "st,stm32mp25-pwm-lp", "st,stm32-pwm-lp";
+					#pwm-cells = <3>;
+					status = "disabled";
+				};
+
+				timer {
+					compatible = "st,stm32mp25-lptimer-timer", "st,stm32-lptimer-timer";
+					status = "disabled";
+				};
+
+				trigger@3 {
+					compatible = "st,stm32mp25-lptimer-trigger", "st,stm32-lptimer-trigger";
+					reg = <3>;
+					status = "disabled";
+				};
+			};
+
+			lptimer5: timer@46070000 {
+				compatible = "st,stm32mp25-lptimer", "st,stm32-lptimer";
+				reg = <0x46070000 0x400>;
+				interrupts-extended = <&exti2 31 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&rcc CK_KER_LPTIM5>;
+				clock-names = "mux";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				access-controllers = <&rifsc 21>;
+				wakeup-source;
+				status = "disabled";
+
+				counter {
+					compatible = "st,stm32mp25-lptimer-counter", "st,stm32-lptimer-counter";
+					status = "disabled";
+				};
+
+				pwm {
+					compatible = "st,stm32mp25-pwm-lp", "st,stm32-pwm-lp";
+					#pwm-cells = <3>;
+					status = "disabled";
+				};
+
+				timer {
+					compatible = "st,stm32mp25-lptimer-timer", "st,stm32-lptimer-timer";
+					status = "disabled";
+				};
+
+				trigger@4 {
+					compatible = "st,stm32mp25-lptimer-trigger", "st,stm32-lptimer-trigger";
+					reg = <4>;
+					status = "disabled";
+				};
+			};
+
 			csi: csi@48020000 {
 				compatible = "st,stm32mp25-csi";
 				reg = <0x48020000 0x2000>;