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drivers: flash: spi_nor: support device PM

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Support device power management in spi_nor driver. Only use
SUSPEND/RESUME if `CONFIG_SPI_NOR_IDLE_IN_DPD` is not enabled to avoid
state conflicts.

Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
This commit is contained in:
Jordan Yates 2023-06-22 17:01:38 +10:00 • committed by Carles Cufí
commit ec44816ae7
1 changed files with 41 additions and 1 deletions
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42
drivers/flash/spi_nor.c
View file

@ -16,6 +16,7 @@
#include <string.h>
#include <zephyr/logging/log.h>
#include <zephyr/sys_clock.h>
#include <zephyr/pm/device.h>
#include "spi_nor.h"
#include "jesd216.h"
@ -1246,6 +1247,44 @@ static int spi_nor_configure(const struct device *dev)
return 0;
}
#ifdef CONFIG_PM_DEVICE
static int spi_nor_pm_control(const struct device *dev, enum pm_device_action action)
{
int rc = 0;
switch (action) {
#ifdef CONFIG_SPI_NOR_IDLE_IN_DPD
case PM_DEVICE_ACTION_SUSPEND:
case PM_DEVICE_ACTION_RESUME:
break;
#else
case PM_DEVICE_ACTION_SUSPEND:
acquire_device(dev);
rc = enter_dpd(dev);
release_device(dev);
break;
case PM_DEVICE_ACTION_RESUME:
acquire_device(dev);
rc = exit_dpd(dev);
release_device(dev);
break;
#endif /* CONFIG_SPI_NOR_IDLE_IN_DPD */
case PM_DEVICE_ACTION_TURN_ON:
/* Coming out of power off */
rc = spi_nor_configure(dev);
break;
case PM_DEVICE_ACTION_TURN_OFF:
break;
default:
rc = -ENOSYS;
}
return rc;
}
#endif /* CONFIG_PM_DEVICE */
/**
* @brief Initialize and configure the flash
*
@ -1389,7 +1428,8 @@ static const struct spi_nor_config spi_nor_config_0 = {
static struct spi_nor_data spi_nor_data_0;
DEVICE_DT_INST_DEFINE(0, &spi_nor_init, NULL,
PM_DEVICE_DT_INST_DEFINE(0, spi_nor_pm_control);
DEVICE_DT_INST_DEFINE(0, &spi_nor_init, PM_DEVICE_DT_INST_GET(0),
&spi_nor_data_0, &spi_nor_config_0,
POST_KERNEL, CONFIG_SPI_NOR_INIT_PRIORITY,
&spi_nor_api);