From: Lars-Peter Clausen Date: Mon, 13 Jul 2015 10:26:44 +0000 (+0200) Subject: regmap: Add better support for devices without readback support X-Git-Tag: omap-for-v4.3/fixes-rc1~58^2~2^2~6 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=04dc91ce2cca5927159c689aa1f47663f8c51530;p=pandora-kernel.git regmap: Add better support for devices without readback support Currently regmap requires that a reg_read callback is supplied, otherwise a warning is emitted each time regmap_read() is called. This means a device or bus without readback support needs to supply dummy reg_read callback. Apart from that regmap_read() will still work fine if a cache is used. Remove the warning and let regmap_readable() return false if not reg_read callback is supplied. This means a device no longer has to supply a dummy callback if it does not support readback and it also doesn't have to have a readable_reg callback that always returns false since this is now implicit. Signed-off-by: Lars-Peter Clausen Signed-off-by: Mark Brown --- Reading git-diff-tree failed