Add support to match st sensors using information passed from ACPI DST
tables.
Signed-off-by: Shrirang Bagul <shrirang.ba...@canonical.com>
---
drivers/iio/common/st_sensors/st_sensors_i2c.c | 20 ++++++++++++++++++++
include/linux/iio/common/st_sensors_i2c.h | 9 +++++++++
2 files changed, 29 insertions(+)
diff --git a/drivers/iio/common/st_sensors/st_sensors_i2c.c
b/drivers/iio/common/st_sensors/st_sensors_i2c.c
index b43aa36..c83df4d 100644
--- a/drivers/iio/common/st_sensors/st_sensors_i2c.c
+++ b/drivers/iio/common/st_sensors/st_sensors_i2c.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/iio/iio.h>
#include <linux/of_device.h>
+#include <linux/acpi.h>
#include <linux/iio/common/st_sensors_i2c.h>
@@ -107,6 +108,25 @@ void st_sensors_of_i2c_probe(struct i2c_client *client,
EXPORT_SYMBOL(st_sensors_of_i2c_probe);
#endif
+#ifdef CONFIG_ACPI
+int st_sensors_match_acpi_device(struct device *dev)
+{
+ const struct acpi_device_id *acpi_id;
+ kernel_ulong_t driver_data = 0;
+
+ if (ACPI_HANDLE(dev)) {
+ acpi_id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!acpi_id) {
+ dev_err(dev, "No driver data\n");
+ return -EINVAL;
+ }
+ driver_data = acpi_id->driver_data;
+ }
+ return driver_data;
+}
+EXPORT_SYMBOL(st_sensors_match_acpi_device);
+#endif
+
MODULE_AUTHOR("Denis Ciocca <denis.cio...@st.com>");
MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
MODULE_LICENSE("GPL v2");
diff --git a/include/linux/iio/common/st_sensors_i2c.h
b/include/linux/iio/common/st_sensors_i2c.h
index 1796af0..254de3c 100644
--- a/include/linux/iio/common/st_sensors_i2c.h
+++ b/include/linux/iio/common/st_sensors_i2c.h
@@ -28,4 +28,13 @@ static inline void st_sensors_of_i2c_probe(struct i2c_client
*client,
}
#endif
+#ifdef CONFIG_ACPI
+int st_sensors_match_acpi_device(struct device *dev);
+#else
+static inline int st_sensors_match_acpi_device(struct device *dev)
+{
+ return -ENODEV;
+}
+#endif
+
#endif /* ST_SENSORS_I2C_H */
--
2.9.3
