Commit 585cda13 authored by Oleh Kravchenko's avatar Oleh Kravchenko Committed by Chris Friedt
Browse files

soc: stm32l1x: Add support for sleep/stop/standby modes 

Add stm32l1_disco and nucleo_l152re overlays for testing
sleep/stop/standby modes:
- samples/boards/st/power_mgmt/blinky;
- samples/boards/st/power_mgmt/wkup_pins;

I've measured consumption for each low-power mode:
- low-power sleep ~1.72mA;
- stop mode ~324uA;
- standby mode ~2.2 uA;

It's possible to use RTC as idle timer to exit from stop mode.

Signed-off-by: default avatarOleh Kravchenko <oleg@kaa.org.ua>
parent 9a9f0604

dts/arm/st/l1/stm32l1.dtsi

+45 −1
Changes for dts/arm/st/l1/stm32l1.dtsi: 45 added lines, 1 removed line.
Original line number Diff line number Diff line
@@ -16,11 +16,13 @@ 
#include <zephyr/dt-bindings/dma/stm32_dma.h>

#include <zephyr/dt-bindings/adc/stm32f4_adc.h>

#include <zephyr/dt-bindings/reset/stm32l1_reset.h>

#include <zephyr/dt-bindings/power/stm32_pwr.h>

#include <freq.h>



/ {

	chosen {

		zephyr,flash-controller = &flash;

		zephyr,cortex-m-idle-timer = &rtc;

	};



	cpus {
@@ -30,10 +32,27 @@ 
		cpu0: cpu@0 {

			device_type = "cpu";

			compatible = "arm,cortex-m3";

			cpu-power-states = <&sleep &stop>;

			reg = <0>;

		};

	};



	power-states {

		sleep: sleep {

			compatible = "zephyr,power-state";

			power-state-name = "runtime-idle";

			min-residency-us = <1000000>;

			exit-latency-us = <750>;

		};



		stop: stop {

			compatible = "zephyr,power-state";

			power-state-name = "suspend-to-idle";

			min-residency-us = <1000000>;

			exit-latency-us = <750>;

		};

	};



	sram0: memory@20000000 {

		compatible = "mmio-sram";

	};
@@ -81,7 +100,6 @@ 
	};



	soc {



		flash: flash-controller@40023c00 {

			compatible = "st,stm32-flash-controller", "st,stm32f1-flash-controller";

			reg = <0x40023c00 0x400>;
@@ -184,6 +202,32 @@ 
			status = "disabled";

		};



		pwr: power@40007000 {

			compatible = "st,stm32-pwr";

			reg = <0x40007000 0x400>; /* PWR register bank */

			status = "disabled";



			wkup-pins-nb = <3>;



			#address-cells = <1>;

			#size-cells = <0>;



			wkup-pin@1 {

				reg = <0x1>;

				wkup-gpios = <&gpioa 0 STM32_PWR_WKUP_PIN_NOT_MUXED>;

			};



			wkup-pin@2 {

				reg = <0x2>;

				wkup-gpios = <&gpioc 13 STM32_PWR_WKUP_PIN_NOT_MUXED>;

			};



			wkup-pin@3 {

				reg = <0x3>;

				wkup-gpios = <&gpioe 6 STM32_PWR_WKUP_PIN_NOT_MUXED>;

			};

		};



		spi1: spi@40013000 {

			compatible = "st,stm32-spi";

			#address-cells = <1>;

samples/boards/st/power_mgmt/wkup_pins/boards/nucleo_l152re.overlay

0 → 100644
+15 −0
Changes for samples/boards/st/power_mgmt/wkup_pins/boards/nucleo_l152re.overlay: 15 added lines, 0 removed lines.
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2025 Oleh Kravchenko <oleh@kaa.org.ua>

 *

 * SPDX-License-Identifier: Apache-2.0

 */



/ {

	aliases {

		wkup-src = &user_button;

	};

};



&pwr {

	status = "okay";

};

samples/boards/st/power_mgmt/wkup_pins/boards/stm32l1_disco.overlay

0 → 100644
+15 −0
Changes for samples/boards/st/power_mgmt/wkup_pins/boards/stm32l1_disco.overlay: 15 added lines, 0 removed lines.
Original line number Diff line number Diff line 
/*

 * Copyright (c) 2025 Oleh Kravchenko <oleh@kaa.org.ua>

 *

 * SPDX-License-Identifier: Apache-2.0

 */



/ {

	aliases {

		wkup-src = &user_button;

	};

};



&pwr {

	status = "okay";

};

samples/boards/st/power_mgmt/wkup_pins/sample.yaml

+2 −0
Changes for samples/boards/st/power_mgmt/wkup_pins/sample.yaml: 2 added lines, 0 removed lines.
Original line number Diff line number Diff line
@@ -12,5 +12,7 @@ tests: 
      - nucleo_u5a5zj_q

      - nucleo_wl55jc

      - nucleo_f103rb

      - stm32l1_disco

      - nucleo_l152re

    integration_platforms:

      - nucleo_l4r5zi

soc/st/stm32/common/soc_config.c

+2 −2
Changes for soc/st/stm32/common/soc_config.c: 2 added lines, 2 removed lines.
Original line number Diff line number Diff line
@@ -69,7 +69,7 @@ static int st_stm32_common_config(void) 


#if defined(CONFIG_STM32_ENABLE_DEBUG_SLEEP_STOP)



#if defined(CONFIG_SOC_SERIES_STM32F1X)

#if defined(CONFIG_SOC_SERIES_STM32F1X) || defined(CONFIG_SOC_SERIES_STM32L1X)

	LL_DBGMCU_EnableDBGSleepMode();

	LL_DBGMCU_EnableDBGStopMode();

	LL_DBGMCU_EnableDBGStandbyMode();
@@ -89,7 +89,7 @@ static int st_stm32_common_config(void) 
#else



/* keeping in mind that debugging draws a lot of power we explcitly disable when not needed */

#if defined(CONFIG_SOC_SERIES_STM32F1X)

#if defined(CONFIG_SOC_SERIES_STM32F1X) || defined(CONFIG_SOC_SERIES_STM32L1X)

	LL_DBGMCU_DisableDBGSleepMode();

	LL_DBGMCU_DisableDBGStopMode();

	LL_DBGMCU_DisableDBGStandbyMode();

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