From 2d7768a872b73a7105d6355948dae0acff72f061 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 7 Aug 2014 08:16:00 +0100 Subject: iio: st_sensors: add devicetree probing support The I2C devices that make up the STMicroelectronics MEMS sensors may be sneakily enabled by cleverly giving the device node the same name as a string match from the platform device ID table. However the right method is to use the compatible string. On detection, the ST sensors use the ID string to probe and instatiate the right sensor driver, so pass the kernel-internal ID string in the .data field of the OF match table, and set the I2C client name to this name when a compatible match is used. This avoids having misc Linux-specific strings floating around in the device tree. Cc: Lee Jones Cc: Denis CIOCCA Signed-off-by: Linus Walleij Signed-off-by: Jonathan Cameron --- drivers/iio/magnetometer/st_magn_i2c.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/iio/magnetometer') diff --git a/drivers/iio/magnetometer/st_magn_i2c.c b/drivers/iio/magnetometer/st_magn_i2c.c index 892e0feeb5c1..689250058442 100644 --- a/drivers/iio/magnetometer/st_magn_i2c.c +++ b/drivers/iio/magnetometer/st_magn_i2c.c @@ -18,6 +18,27 @@ #include #include "st_magn.h" +#ifdef CONFIG_OF +static const struct of_device_id st_magn_of_match[] = { + { + .compatible = "st,lsm303dlhc-magn", + .data = LSM303DLHC_MAGN_DEV_NAME, + }, + { + .compatible = "st,lsm303dlm-magn", + .data = LSM303DLM_MAGN_DEV_NAME, + }, + { + .compatible = "st,lis3mdl-magn", + .data = LIS3MDL_MAGN_DEV_NAME, + }, + {}, +}; +MODULE_DEVICE_TABLE(of, st_magn_of_match); +#else +#define st_magn_of_match NULL +#endif + static int st_magn_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -31,6 +52,7 @@ static int st_magn_i2c_probe(struct i2c_client *client, mdata = iio_priv(indio_dev); mdata->dev = &client->dev; + st_sensors_of_i2c_probe(client, st_magn_of_match); st_sensors_i2c_configure(indio_dev, client, mdata); @@ -61,6 +83,7 @@ static struct i2c_driver st_magn_driver = { .driver = { .owner = THIS_MODULE, .name = "st-magn-i2c", + .of_match_table = of_match_ptr(st_magn_of_match), }, .probe = st_magn_i2c_probe, .remove = st_magn_i2c_remove, -- cgit v1.2.3