diff options
| author | Patrick Delaunay <patrick.delaunay@foss.st.com> | 2022-03-29 16:01:13 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt <heinrich.schuchardt@canonical.com> | 2022-03-31 19:06:16 +0200 |
| commit | 572934d15a67ce5643472b5f6d3151476cc2b89d (patch) | |
| tree | 9cb30698f8f343e74a4e5a0c786ce86c219decfb /doc | |
| parent | 64437a05d255128392177984563e6a2128636834 (diff) | |
doc: mmc dev
Provide human readable descriptions of the speed nodes instead of the name
of constants from the code as it is already done for 'mmc rescan'
command in commit 212f078496e4 ("doc: mmc rescan speed mode").
Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Aswath Govindraju <a-govindraju@ti.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/usage/mmc.rst | 36 |
1 files changed, 20 insertions, 16 deletions
diff --git a/doc/usage/mmc.rst b/doc/usage/mmc.rst index 02b5d7b1c7..55e3f9cf98 100644 --- a/doc/usage/mmc.rst +++ b/doc/usage/mmc.rst @@ -85,22 +85,26 @@ The 'mmc dev' command shows or set current mmc device. mode speed mode to set. - CONFIG_MMC_SPEED_MODE_SET should be enabled. The required speed mode is - passed as the index from the following list. - - 0 - MMC_LEGACY - 1 - MMC_HS - 2 - SD_HS - 3 - MMC_HS_52 - 4 - MMC_DDR_52 - 5 - UHS_SDR12 - 6 - UHS_SDR25 - 7 - UHS_SDR50 - 8 - UHS_DDR50 - 9 - UHS_SDR104 - 10 - MMC_HS_200 - 11 - MMC_HS_400 - 12 - MMC_HS_400_ES + CONFIG_MMC_SPEED_MODE_SET should be enabled. The requested speed mode is + passed as a decimal number according to the following table: + + ========== ========================== + Speed mode Description + ========== ========================== + 0 MMC legacy + 1 MMC High Speed (26MHz) + 2 SD High Speed (50MHz) + 3 MMC High Speed (52MHz) + 4 MMC DDR52 (52MHz) + 5 UHS SDR12 (25MHz) + 6 UHS SDR25 (50MHz) + 7 UHS SDR50 (100MHz) + 8 UHS DDR50 (50MHz) + 9 UHS SDR104 (208MHz) + 10 HS200 (200MHz) + 11 HS400 (200MHz) + 12 HS400ES (200MHz) + ========== ========================== A speed mode can be set only if it has already been enabled in the device tree |