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drivers: sensor: add api function for getting a sensor attribute

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Add an API function for getting the value of a sensor attribute.

Fixes #26167.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2020-06-13 21:02:10 +02:00 • committed by Carles Cufí
commit 696fc3afbf
2 changed files with 57 additions and 0 deletions
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12
drivers/sensor/sensor_handlers.c
View file

@ -19,6 +19,18 @@ static inline int z_vrfy_sensor_attr_set(struct device *dev,
} }
#include <syscalls/sensor_attr_set_mrsh.c> #include <syscalls/sensor_attr_set_mrsh.c>
static inline int z_vrfy_sensor_attr_get(struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
struct sensor_value *val)
{
Z_OOPS(Z_SYSCALL_DRIVER_SENSOR(dev, attr_get));
Z_OOPS(Z_SYSCALL_MEMORY_WRITE(val, sizeof(struct sensor_value)));
return z_impl_sensor_attr_get((struct device *)dev, chan, attr,
(struct sensor_value *)val);
}
#include <syscalls/sensor_attr_get_mrsh.c>
static inline int z_vrfy_sensor_sample_fetch(struct device *dev) static inline int z_vrfy_sensor_sample_fetch(struct device *dev)
{ {
Z_OOPS(Z_SYSCALL_DRIVER_SENSOR(dev, sample_fetch)); Z_OOPS(Z_SYSCALL_DRIVER_SENSOR(dev, sample_fetch));

45
include/drivers/sensor.h
View file

@ -320,6 +320,18 @@ typedef int (*sensor_attr_set_t)(struct device *dev,
enum sensor_channel chan, enum sensor_channel chan,
enum sensor_attribute attr, enum sensor_attribute attr,
const struct sensor_value *val); const struct sensor_value *val);
/**
* @typedef sensor_attr_get_t
* @brief Callback API upon getting a sensor's attributes
*
* See sensor_attr_get() for argument description
*/
typedef int (*sensor_attr_get_t)(struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
struct sensor_value *val);
/** /**
* @typedef sensor_trigger_set_t * @typedef sensor_trigger_set_t
* @brief Callback API for setting a sensor's trigger and handler * @brief Callback API for setting a sensor's trigger and handler
@ -349,6 +361,7 @@ typedef int (*sensor_channel_get_t)(struct device *dev,
__subsystem struct sensor_driver_api { __subsystem struct sensor_driver_api {
sensor_attr_set_t attr_set; sensor_attr_set_t attr_set;
sensor_attr_get_t attr_get;
sensor_trigger_set_t trigger_set; sensor_trigger_set_t trigger_set;
sensor_sample_fetch_t sample_fetch; sensor_sample_fetch_t sample_fetch;
sensor_channel_get_t channel_get; sensor_channel_get_t channel_get;
@ -386,6 +399,38 @@ static inline int z_impl_sensor_attr_set(struct device *dev,
return api->attr_set(dev, chan, attr, val); return api->attr_set(dev, chan, attr, val);
} }
/**
* @brief Get an attribute for a sensor
*
* @param dev Pointer to the sensor device
* @param chan The channel the attribute belongs to, if any. Some
* attributes may only be set for all channels of a device, depending on
* device capabilities.
* @param attr The attribute to get
* @param val Pointer to where to store the attribute
*
* @return 0 if successful, negative errno code if failure.
*/
__syscall int sensor_attr_get(struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
struct sensor_value *val);
static inline int z_impl_sensor_attr_get(struct device *dev,
enum sensor_channel chan,
enum sensor_attribute attr,
struct sensor_value *val)
{
const struct sensor_driver_api *api =
(const struct sensor_driver_api *)dev->driver_api;
if (api->attr_get == NULL) {
return -ENOTSUP;
}
return api->attr_get(dev, chan, attr, val);
}
/** /**
* @brief Activate a sensor's trigger and set the trigger handler * @brief Activate a sensor's trigger and set the trigger handler
* *