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drivers: sensor: ntc-thermistor: Add PM support

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Add support for runtime power management.

Signed-off-by: Paweł Anikiel <pan@semihalf.com>
This commit is contained in:
Paweł Anikiel 2023-08-08 14:49:02 +00:00 committed by Maureen Helm
parent ebdfb6b5e2
commit cd67428fec
1 changed files with 38 additions and 3 deletions
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41
drivers/sensor/ntc_thermistor/ntc_thermistor.c
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@ -6,6 +6,8 @@
#include <zephyr/drivers/adc.h>
#include <zephyr/drivers/sensor.h>
#include <zephyr/pm/device.h>
#include <zephyr/pm/device_runtime.h>
#include <zephyr/logging/log.h>
#include "ntc_thermistor.h"
@ -26,6 +28,7 @@ static int ntc_thermistor_sample_fetch(const struct device *dev, enum sensor_cha
{
struct ntc_thermistor_data *data = dev->data;
const struct ntc_thermistor_config *cfg = dev->config;
enum pm_device_state pm_state;
int32_t val_mv;
int res;
struct adc_sequence sequence = {
@ -35,6 +38,11 @@ static int ntc_thermistor_sample_fetch(const struct device *dev, enum sensor_cha
.calibrate = false,
};
(void)pm_device_state_get(dev, &pm_state);
if (pm_state != PM_DEVICE_STATE_ACTIVE) {
return -EIO;
}
k_mutex_lock(&data->mutex, K_FOREVER);
adc_sequence_init_dt(&cfg->adc_channel, &sequence);
@ -92,9 +100,34 @@ static int ntc_thermistor_init(const struct device *dev)
return err;
}
#ifdef CONFIG_PM_DEVICE_RUNTIME
pm_device_init_suspended(dev);
err = pm_device_runtime_enable(dev);
if (err) {
LOG_ERR("Failed to enable runtime power management");
return err;
}
#endif
return 0;
}
#ifdef CONFIG_PM_DEVICE
static int ntc_thermistor_pm_action(const struct device *dev, enum pm_device_action action)
{
switch (action) {
case PM_DEVICE_ACTION_TURN_ON:
case PM_DEVICE_ACTION_RESUME:
case PM_DEVICE_ACTION_TURN_OFF:
case PM_DEVICE_ACTION_SUSPEND:
return 0;
default:
return -ENOTSUP;
}
}
#endif
#define NTC_THERMISTOR_DEFINE0(inst, id, _comp, _n_comp) \
static struct ntc_thermistor_data ntc_thermistor_driver_##id##inst; \
\
@ -113,10 +146,12 @@ static int ntc_thermistor_init(const struct device *dev)
}, \
}; \
\
PM_DEVICE_DT_INST_DEFINE(inst, ntc_thermistor_pm_action); \
\
SENSOR_DEVICE_DT_INST_DEFINE( \
inst, ntc_thermistor_init, NULL, &ntc_thermistor_driver_##id##inst, \
&ntc_thermistor_cfg_##id##inst, POST_KERNEL, CONFIG_SENSOR_INIT_PRIORITY, \
&ntc_thermistor_driver_api);
inst, ntc_thermistor_init, PM_DEVICE_DT_INST_GET(inst), \
&ntc_thermistor_driver_##id##inst, &ntc_thermistor_cfg_##id##inst, POST_KERNEL, \
CONFIG_SENSOR_INIT_PRIORITY, &ntc_thermistor_driver_api);
#define NTC_THERMISTOR_DEFINE(inst, id, comp) \
NTC_THERMISTOR_DEFINE0(inst, id, comp, ARRAY_SIZE(comp))