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| author | Adrian Hunter <adrian.hunter@intel.com> | 2015-02-06 14:12:57 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-06-01 09:07:13 +0200 |
| commit | b097e07f57930eda774c83aa46e8e401686d01dc (patch) | |
| tree | 95d8979dd8fec7f787b30e1538f960e999e3c1ef | |
| parent | 3853a042325e8f497c199020979c4fc824528c6e (diff) | |
| download | op-kernel-dev-b097e07f57930eda774c83aa46e8e401686d01dc.zip op-kernel-dev-b097e07f57930eda774c83aa46e8e401686d01dc.tar.gz | |
mmc: mmc: Read card's valid driver strength mask
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>
| -rw-r--r-- | drivers/mmc/core/mmc.c | 1 | ||||
| -rw-r--r-- | include/linux/mmc/card.h | 1 | ||||
| -rw-r--r-- | include/linux/mmc/mmc.h | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 03c94c2..9b808d1 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -437,6 +437,7 @@ static int mmc_decode_ext_csd(struct mmc_card *card, u8 *ext_csd) card->ext_csd.raw_trim_mult = ext_csd[EXT_CSD_TRIM_MULT]; card->ext_csd.raw_partition_support = ext_csd[EXT_CSD_PARTITION_SUPPORT]; + card->ext_csd.raw_driver_strength = ext_csd[EXT_CSD_DRIVER_STRENGTH]; if (card->ext_csd.rev >= 4) { if (ext_csd[EXT_CSD_PARTITION_SETTING_COMPLETED] & EXT_CSD_PART_SETTING_COMPLETED) diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index 2f073d5..4d3776d 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -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 */ diff --git a/include/linux/mmc/mmc.h b/include/linux/mmc/mmc.h index 124f562..4819cfb 100644 --- a/include/linux/mmc/mmc.h +++ b/include/linux/mmc/mmc.h @@ -302,6 +302,7 @@ struct _mmc_csd { #define EXT_CSD_REV 192 /* RO */ #define EXT_CSD_STRUCTURE 194 /* RO */ #define EXT_CSD_CARD_TYPE 196 /* RO */ +#define EXT_CSD_DRIVER_STRENGTH 197 /* RO */ #define EXT_CSD_OUT_OF_INTERRUPT_TIME 198 /* RO */ #define EXT_CSD_PART_SWITCH_TIME 199 /* RO */ #define EXT_CSD_PWR_CL_52_195 200 /* RO */ |
