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3 Commits

Author SHA1 Message Date
Peter Meerwald a5a3e43111 iio: Fix sign extension table in mcp3422 driver 
the index argument to sign_extend32() gives the bit position (from 0)
to the sign bit

so e.g. if the measurement has 16-bit resolution, we need to pass 15;
a measurement of 0x8000 should be reported as -32768, not 32768

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Acked-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
 2013-11-05 22:45:25 +00:00
Sachin Kamat de36d817b4 iio: adc: mcp3422: Include linux/of.h header 
'of_match_ptr' is defined in linux/of.h. Include it explicitly to
avoid build breakage in the future.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
 2013-10-18 20:05:56 +01:00
Angelo Compagnucci 07914c84ba iio: adc: Add driver for Microchip MCP3422/3/4 high resolution ADC 
Sysfs access to all channels.

Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
 2013-09-07 22:17:44 +01:00