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    Subject[PATCH 1/3] iio: st_sensors: match sensors using ACPI handle
    Date
    Add support to match st sensors using information passed from ACPI DST
    tables.

    Signed-off-by: Shrirang Bagul <shrirang.bagul@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.ciocca@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
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