From: Subhash Jadavani <subhashj@codeaurora.org>
Date: Tue, 6 Mar 2012 12:29:12 +0000 (+0530)
Subject: mmc: core: hs200 fixes
X-Git-Tag: v3.4-rc1~49^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=52d0974e36761fd1daf1eb02cfb2444a7b200087;p=pandora-kernel.git

mmc: core: hs200 fixes

This patch fixes following issues when HS200 is enabled:

1. If executing_tuning() host ops is called without mmc_host_clk_hold(),
   card clocks might get turned off (if MMC_CLK_GATING is enabled)
   while execute_tuning() is in progress. So this patch makes sure
   that execute_tuning() is called with mmc_host_clk_hold().

2. If host timing mode is set to HS200 mode, there should not be
   any communication with the card until execute_tuning() is completed.
   But there is a chance that CMD6 might be sent to enable set HPI_EN
   (of HPI_MGMT field in EXT_CSD) before execute_tuning() is called.
   So this patch moves this operation after execute_tuning() is completed.

Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org>
Reviewed-by: girish.shivananjappa@linaro.org
Signed-off-by: Chris Ball <cjb@laptop.org>
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