mmc: core: fix power class selection
authorSubhash Jadavani <subhashj@codeaurora.org>
Tue, 3 Apr 2012 06:55:58 +0000 (11:55 +0530)
committerChris Ball <cjb@laptop.org>
Fri, 6 Apr 2012 00:32:31 +0000 (20:32 -0400)
commit93fc5a47f25c41125b30c0bf4f243bf3204a1a0a
treeec82fab62c5c989d0a6ce94695cd5b67c1c9f392
parentfc307df88f0d77505c19756d95be66c981c421ea
mmc: core: fix power class selection

mmc_select_powerclass() function returns error if eMMC
VDD level supported by host is between 2.7v to 3.2v.

According to eMMC specification, valid voltage for high
voltage cards is 2.7v to 3.6v. This patch ensures that
2.7v to 3.6v VDD range is treated as valid range.

Also, failure to set the power class shouldn't be treated
as fatal error because even if setting the power class
fails, card can still work in default power class.
If mmc_select_powerclass() returns error, just print
the warning message and go ahead with rest of the card
initialization.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Acked-by: Girish K S <girish.shivananjappa@linaro.org>
Reviewed-by: Namjae Jeon <linkinjeon@gmail.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
drivers/mmc/core/mmc.c