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drivers: lis2dh: power management

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* Add support for power management.

Signed-off-by: Jeremy Wood <jeremy@bcdevices.com>
This commit is contained in:
Jeremy Wood 2022-02-24 17:42:30 -08:00 • committed by Maureen Helm
commit 2331b76b9b
2 changed files with 49 additions and 1 deletions
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44
drivers/sensor/lis2dh/lis2dh.c
View file

@ -11,6 +11,7 @@
#include <sys/byteorder.h>
#include <sys/__assert.h>
#include <logging/log.h>
#include <pm/device.h>
LOG_MODULE_REGISTER(lis2dh, CONFIG_SENSOR_LOG_LEVEL);
#include "lis2dh.h"
@ -430,6 +431,46 @@ int lis2dh_init(const struct device *dev)
LIS2DH_ODR_BITS);
}
#ifdef CONFIG_PM_DEVICE
static int lis2dh_pm_action(const struct device *dev,
enum pm_device_action action)
{
int status;
struct lis2dh_data *lis2dh = dev->data;
switch (action) {
case PM_DEVICE_ACTION_RESUME:
/* Resume previous mode. */
status = lis2dh->hw_tf->write_reg(dev, LIS2DH_REG_CTRL1,
lis2dh->reg_ctrl1_active_val);
if (status < 0) {
LOG_ERR("failed to write reg_crtl1");
return status;
}
break;
case PM_DEVICE_ACTION_SUSPEND:
/* Store current mode, suspend. */
status = lis2dh->hw_tf->read_reg(dev, LIS2DH_REG_CTRL1,
&lis2dh->reg_ctrl1_active_val);
if (status < 0) {
LOG_ERR("failed to read reg_crtl1");
return status;
}
status = lis2dh->hw_tf->write_reg(dev, LIS2DH_REG_CTRL1,
LIS2DH_SUSPEND);
if (status < 0) {
LOG_ERR("failed to write reg_crtl1");
return status;
}
break;
default:
return -ENOTSUP;
}
return 0;
}
#endif /* CONFIG_PM_DEVICE */
#if DT_NUM_INST_STATUS_OKAY(DT_DRV_COMPAT) == 0
#warning "LIS2DH driver enabled without any devices"
#endif
@ -440,9 +481,10 @@ int lis2dh_init(const struct device *dev)
*/
#define LIS2DH_DEVICE_INIT(inst) \
PM_DEVICE_DT_INST_DEFINE(inst, lis2dh_pm_action); \
DEVICE_DT_INST_DEFINE(inst, \
lis2dh_init, \
NULL, \
PM_DEVICE_DT_INST_GET(inst), \
&lis2dh_data_##inst, \
&lis2dh_config_##inst, \
POST_KERNEL, \

6
drivers/sensor/lis2dh/lis2dh.h
View file

@ -49,6 +49,8 @@
#define LIS2DH_LP_EN_BIT 0
#endif
#define LIS2DH_SUSPEND 0
#define LIS2DH_ODR_1 1
#define LIS2DH_ODR_2 2
#define LIS2DH_ODR_3 3
@ -238,6 +240,10 @@ struct lis2dh_data {
struct sensor_value temperature;
#endif
#ifdef CONFIG_PM_DEVICE
uint8_t reg_ctrl1_active_val;
#endif
#ifdef CONFIG_LIS2DH_TRIGGER
const struct device *dev;
struct gpio_callback gpio_int1_cb;