[PATCH] doc: mmc dev

[Patrick Delaunay]

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 at foss.st.com>
---

 doc/usage/mmc.rst | 36 ++++++++++++++++++++----------------
 1 file 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
 
-- 
2.25.1