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drivers: voltage_divider: handle ADC PM

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Some ADC's draw significant power while enabled, so make sure the
driver can handle ADC's that have device runtime PM enabled.

Signed-off-by: Jordan Yates <jordan@embeint.com>
This commit is contained in:
Jordan Yates 2025-06-07 21:32:07 +10:00 • committed by Benjamin Cabé
commit 7189ade82d
1 changed files with 5 additions and 0 deletions
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5
drivers/sensor/voltage_divider/voltage.c
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@ -11,6 +11,7 @@
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/pm/device.h>
#include <zephyr/pm/device_runtime.h>
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(voltage, CONFIG_SENSOR_LOG_LEVEL);
@ -125,6 +126,8 @@ static int pm_action(const struct device *dev, enum pm_device_action action)
}
data->earliest_sample = K_TIMEOUT_ABS_TICKS(
k_uptime_ticks() + k_us_to_ticks_ceil32(config->sample_delay_us));
/* Power up ADC */
pm_device_runtime_get(config->voltage.port.dev);
break;
#ifdef CONFIG_PM_DEVICE
case PM_DEVICE_ACTION_SUSPEND:
@ -132,6 +135,8 @@ static int pm_action(const struct device *dev, enum pm_device_action action)
if (ret != 0) {
LOG_ERR("failed to set GPIO for PM suspend");
}
/* Power down ADC */
pm_device_runtime_put(config->voltage.port.dev);
break;
case PM_DEVICE_ACTION_TURN_OFF:
break;