diff --git a/drivers/iio/industrialio-acpi.c b/drivers/iio/industrialio-acpi.c index 1e46908f9534..d67a43843799 100644 --- a/drivers/iio/industrialio-acpi.c +++ b/drivers/iio/industrialio-acpi.c @@ -2,7 +2,8 @@ /* IIO ACPI helper functions */ #include -#include +#include +#include #include #include @@ -87,3 +88,38 @@ bool iio_read_acpi_mount_matrix(struct device *dev, return ret; } EXPORT_SYMBOL_GPL(iio_read_acpi_mount_matrix); + +/** + * iio_get_acpi_device_name_and_data() - Return ACPI device instance name and driver data + * @dev: Device structure + * @data: Optional pointer to return driver data + * + * When device was enumerated by ACPI ID matching, the user might + * want to set description for the physical chip. In such cases + * the ACPI device instance name might be used. This call may be + * performed to retrieve this information. + * + * NOTE: This helper function exists only for backward compatibility, + * do not use in a new code! + * + * Returns: ACPI device instance name or %NULL. + */ +const char *iio_get_acpi_device_name_and_data(struct device *dev, const void **data) +{ + const struct acpi_device_id *id; + acpi_handle handle; + + handle = ACPI_HANDLE(dev); + if (!handle) + return NULL; + + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return NULL; + + if (data) + *data = (const void *)id->driver_data; + + return dev_name(dev); +} +EXPORT_SYMBOL_GPL(iio_get_acpi_device_name_and_data); diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index 3a9b57187a95..445d6666a291 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -831,6 +831,7 @@ int iio_device_resume_triggering(struct iio_dev *indio_dev); bool iio_read_acpi_mount_matrix(struct device *dev, struct iio_mount_matrix *orientation, char *acpi_method); +const char *iio_get_acpi_device_name_and_data(struct device *dev, const void **data); #else static inline bool iio_read_acpi_mount_matrix(struct device *dev, struct iio_mount_matrix *orientation, @@ -838,7 +839,16 @@ static inline bool iio_read_acpi_mount_matrix(struct device *dev, { return false; } +static inline const char * +iio_get_acpi_device_name_and_data(struct device *dev, const void **data) +{ + return NULL; +} #endif +static inline const char *iio_get_acpi_device_name(struct device *dev) +{ + return iio_get_acpi_device_name_and_data(dev, NULL); +} /** * iio_get_current_scan_type - Get the current scan type for a channel