Messages in this thread Patch in this message | | | From | Shawn Lin <> | Subject | [PATCH 3/3] Documentation: mmc: add description for new no-sd* and no-mmc | Date | Fri, 1 Jul 2016 15:45:30 +0800 |
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This patch adds description for no-sd, no-sdio, no-mmc. We expect the specific boards adds these in DT to improve the initialization. For instance, for a soldered eMMC slot, we could skip sending SDIO and SD commands to probe its card types as it's always should be the type fo MMC card.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> ---
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..b2046c6 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: skip sending sdio cmd during initialization +- no-sd: skip sending sd cmd during initialization +- no-mmc: skip sending 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" -- 2.3.7
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