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Subject[PATCH v2 1/2] Documentation: mmc: add description for new no-sd* and no-mmc
This patch adds description for no-sd, no-sdio, no-mmc. We expose
these to DT as some of the controllers are unable to deal with
special cmd type due to hw limitation.

Signed-off-by: Shawn Lin <>


Changes in v2:
- amend the description of these properties and the commit msg

Documentation/devicetree/bindings/mmc/mmc.txt | 3 +++
1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index ecc007a..22d1e1f 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -49,6 +49,9 @@ Optional properties:
- mmc-hs400-enhanced-strobe: eMMC HS400 enhanced strobe mode is supported
- dsr: Value the card's (optional) Driver Stage Register (DSR) should be
programmed with. Valid range: [0 .. 0xffff].
+- no-sdio: controller is limited to send sdio cmd during initialization
+- no-sd: controller is limited to send sd cmd during initialization
+- no-mmc: controller is limited to send mmc cmd during initialization

*NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line
polarity properties, we have to fix the meaning of the "normal" and "inverted"

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