From: Guenter Roeck Date: Tue, 3 Feb 2015 18:01:19 +0000 (-0800) Subject: regmap: Fix i2c word access when using SMBus access functions X-Git-Tag: fixes-v4.0-rc1~185^2^4 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5892ded23c8e9e015b01347222ba4de8a80e7ce2;p=pandora-kernel.git regmap: Fix i2c word access when using SMBus access functions SMBus access functions assume that 16-bit values are formatted as little endian numbers. The direct i2c access functions in regmap, however, assume that 16-bit values are formatted as big endian numbers. As a result, the current code returns different values if an i2c chip's 16-bit registers are accessed through i2c access functions vs. SMBus access functions. Use regmap_smbus_read_word_swapped and regmap_smbus_write_word_swapped for 16-bit SMBus accesses if a chip is configured as REGMAP_ENDIAN_BIG. If the chip is configured as REGMAP_ENDIAN_LITTLE, keep using regmap_smbus_write_word_data and regmap_smbus_read_word_data. Otherwise reject registration if the controller does not support direct i2c accesses. Signed-off-by: Guenter Roeck Signed-off-by: Mark Brown --- Reading git-diff-tree failed