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mmc: mmc: Read card's valid driver strength mask

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In preparation for supporing drive strength selection
for eMMC, read the card's valid driver strengths.

Note that though the SD spec uses the term "drive strength",
the JEDEC eMMC spec uses the term "driver strength".

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Adrian Hunter 2015-02-06 14:12:57 +02:00 • committed by Ulf Hansson
parent 3853a04232
commit b097e07f57
3 changed files with 3 additions and 0 deletions
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1
include/linux/mmc/card.h
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@ -97,6 +97,7 @@ struct mmc_ext_csd {
u8 raw_erased_mem_count; /* 181 */
u8 raw_ext_csd_structure; /* 194 */
u8 raw_card_type; /* 196 */
u8 raw_driver_strength; /* 197 */
u8 out_of_int_time; /* 198 */
u8 raw_pwr_cl_52_195; /* 200 */
u8 raw_pwr_cl_26_195; /* 201 */