3 Commits

Author	SHA1	Message	Date
Hartmut Knaack	e0922e5e3c	iio:humidity:si7020: fix pointer to i2c client ... In si7020_read_raw() the pointer to the i2c client was obtained as second level pointer, although a simple pointer is appropriate. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>	2014-10-25 20:55:56 +01:00
Hartmut Knaack	345b48307d	iio:humidity:si7020: cleanup read_raw and probe ... When reading temperature or humidity values, a shift of two bits to the right needs to be applied, and only for the humidity channel a mask of the lower 12 bits needs to be applied. This reduces code repetition. During probe, i2c_set_clientdata() was used, although its counterpart was not, so drop it. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>	2014-10-25 20:55:56 +01:00
David Barksdale	064a74637c	IIO: add si7020 driver ... This patch adds support to the Industrial IO subsystem for the Silicon Labs Si7013/20/21 Relative Humidity and Temperature Sensors. Website: http://www.silabs.com/products/sensors/humidity-sensors/Pages/si7013-20-21.aspx These are i2c devices which measure relative humidity and temperature and all use the same protocol. The Si7013 has an additional input with programmable linearization which is not supported because that's complicated and I didn't need it. Signed-off-by: David Barksdale <dbarksdale@uplogix.com> -- Changes since v1: * Renamed to si7020 and replaced Si701x/2x with Si7013/20/21. * Removed unneeded mutex. * Pre-computed floating-point constant expressions. * Removed address_list and I2C_CLASS_HWMON. Changes since v2: * Return correct raw sensor values. * Rename dev variable to indio_dev. * Issue a software reset command during probe. * Un-broke string literal. Changes since v3: * enum changed to #define Signed-off-by: Jonathan Cameron <jic23@kernel.org>	2014-10-04 12:43:30 +01:00