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Diffstat (limited to 'Documentation/mmc/mmc-dev-attrs.txt')
| -rw-r--r-- | Documentation/mmc/mmc-dev-attrs.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/mmc/mmc-dev-attrs.txt b/Documentation/mmc/mmc-dev-attrs.txt index 8898a95b41e..189bab09255 100644 --- a/Documentation/mmc/mmc-dev-attrs.txt +++ b/Documentation/mmc/mmc-dev-attrs.txt @@ -22,9 +22,12 @@ All attributes are read-only. manfid Manufacturer ID (from CID Register) name Product Name (from CID Register) oemid OEM/Application ID (from CID Register) + prv Product Revision (from CID Register) (SD and MMCv4 only) serial Product Serial Number (from CID Register) erase_size Erase group size preferred_erase_size Preferred erase size + raw_rpmb_size_mult RPMB partition size + rel_sectors Reliable write sector count Note on Erase Size and Preferred Erase Size: @@ -64,3 +67,18 @@ Note on Erase Size and Preferred Erase Size: size specified by the card. "preferred_erase_size" is in bytes. + +Note on raw_rpmb_size_mult: + "raw_rpmb_size_mult" is a mutliple of 128kB block. + RPMB size in byte is calculated by using the following equation: + RPMB partition size = 128kB x raw_rpmb_size_mult + +SD/MMC/SDIO Clock Gating Attribute +================================== + +Read and write access is provided to following attribute. +This attribute appears only if CONFIG_MMC_CLKGATE is enabled. + + clkgate_delay Tune the clock gating delay with desired value in milliseconds. + +echo <desired delay> > /sys/class/mmc_host/mmcX/clkgate_delay |