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iio: st_sensors: add devicetree probing support

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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 <lee.jones@linaro.org>
Cc: Denis CIOCCA <denis.ciocca@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Linus Walleij
2014-08-07 08:16:00 +01:00
committed by Jonathan Cameron
parent 3b1cae7c2c
commit 2d7768a872
6 changed files with 177 additions and 0 deletions
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11
include/linux/iio/common/st_sensors_i2c.h
View File

@@ -13,8 +13,19 @@
#include <linux/i2c.h>
#include <linux/iio/common/st_sensors.h>
#include <linux/of.h>
void st_sensors_i2c_configure(struct iio_dev *indio_dev,
struct i2c_client *client, struct st_sensor_data *sdata);
#ifdef CONFIG_OF
void st_sensors_of_i2c_probe(struct i2c_client *client,
const struct of_device_id *match);
#else
static inline void st_sensors_of_i2c_probe(struct i2c_client *client,
const struct of_device_id *match)
{
}
#endif
#endif /* ST_SENSORS_I2C_H */