Commit 858e8c51 authored by Aurelien Jarno's avatar Aurelien Jarno Committed by Anas Nashif
Browse files

drivers: spi: stm32: add runtime PM support 



Add runtime power management suppor to the STM32 SPI driver. This allows
the driver to be suspended when not in use, and as a stop effect removes
the need to suspend/resume around each transition to stop mode.

Signed-off-by: default avatarAurelien Jarno <aurelien@aurel32.net>
parent 63eccd3b

drivers/spi/spi_ll_stm32.c

+4 −1
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ LOG_MODULE_REGISTER(spi_ll_stm32); 
#include <zephyr/toolchain.h>

#include <zephyr/pm/policy.h>

#include <zephyr/pm/device.h>

#include <zephyr/pm/device_runtime.h>

#ifdef CONFIG_SPI_STM32_DMA

#include <zephyr/drivers/dma/dma_stm32.h>

#include <zephyr/drivers/dma.h>
@@ -82,6 +83,7 @@ static void spi_stm32_pm_policy_state_lock_get(const struct device *dev) 
			if (IS_ENABLED(CONFIG_PM_S2RAM)) {

				pm_policy_state_lock_get(PM_STATE_SUSPEND_TO_RAM, PM_ALL_SUBSTATES);

			}

			pm_device_runtime_get(dev);

		}

	}

}
@@ -93,6 +95,7 @@ static void spi_stm32_pm_policy_state_lock_put(const struct device *dev) 


		if (data->pm_policy_state_on) {

			data->pm_policy_state_on = false;

			pm_device_runtime_put(dev);

			pm_policy_state_lock_put(PM_STATE_SUSPEND_TO_IDLE, PM_ALL_SUBSTATES);

			if (IS_ENABLED(CONFIG_PM_S2RAM)) {

				pm_policy_state_lock_put(PM_STATE_SUSPEND_TO_RAM, PM_ALL_SUBSTATES);
@@ -1224,7 +1227,7 @@ static int spi_stm32_init(const struct device *dev) 


	spi_context_unlock_unconditionally(&data->ctx);



	return 0;

	return pm_device_runtime_enable(dev);

}



#ifdef CONFIG_PM_DEVICE

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