Re: [PATCH] iio: si7020: Fix endianness for I2C reads

From: Lars-Peter Clausen
Date: Fri Mar 13 2015 - 06:45:27 EST

On 03/13/2015 03:53 AM, Andrey Smirnov wrote:
Si7020 outputs most significant byte of the measurement result first
and least significant byte last. As a result the data returned by
i2c_smbus_read_word_data appears as big endian. Fix this by making a
call to an approbriate byte conversion routine.

i2c_smbus_read_word_data() returns data in native endianess. But it interprets the word on the bus as little-endian (As specified by the SMBus spec). If your chip returns data in big-endian use i2c_smbus_read_word_data_swapped().

- Lars
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