Documentation: mmc: add description for new no-sd* and no-mmc

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

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 <shawn.lin@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

authored by

Shawn Lin and committed by

Ulf Hansson 9 years ago 5f1d1434 5fb06af7

1 changed file

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Documentation

devicetree

bindings

mmc

mmc.txt

Documentation/devicetree/bindings/mmc/mmc.txt

··· 49 49 - mmc-hs400-enhanced-strobe: eMMC HS400 enhanced strobe mode is supported 50 50 - dsr: Value the card's (optional) Driver Stage Register (DSR) should be 51 51 programmed with. Valid range: [0 .. 0xffff]. 52 + - no-sdio: controller is limited to send sdio cmd during initialization 53 + - no-sd: controller is limited to send sd cmd during initialization 54 + - no-mmc: controller is limited to send mmc cmd during initialization 52 55 53 56 *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line 54 57 polarity properties, we have to fix the meaning of the "normal" and "inverted"