mmc: core: hs200 fixes
authorSubhash Jadavani <subhashj@codeaurora.org>
Tue, 6 Mar 2012 12:29:12 +0000 (17:29 +0530)
committerChris Ball <cjb@laptop.org>
Tue, 27 Mar 2012 16:20:05 +0000 (12:20 -0400)
commit52d0974e36761fd1daf1eb02cfb2444a7b200087
tree6cfa1bee02321bcbf61ee0ae20652c3ee3ed4629
parent37f6190d54f4d90b886784fadbb9cf82d5c8b1ef
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>
drivers/mmc/core/mmc.c