linux/Documentation/devicetree/bindings/mmc
Daniel Drake 8ed765aac3 mmc: dt: add no-1-8-v device tree flag
The OLPC XO-1.75 laptop includes a SDHCI controller which is 1.8v
capable, and it truthfully reports so in its capabilities. This
alternate voltage is used for driving new "UHS-I" SD cards at their
full speed.

However, what the controller doesn't know is that the motherboard
physically doesn't have a 1.8v supply available, so attempting to
switch to the 1.8v level will result in a situation that cannot be
recovered from without physically replugging the SD card.

Add a device tree flag that can be used on systems like these,
and hook it up to the equivalent SDHCI quirk.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Reviewed-by: Philip Rakity <prakity@nvidia.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
2012-12-06 13:55:05 -05:00
..
atmel-hsmci.txt mmc: atmel-mci: add device tree support 2012-09-04 13:58:14 -04:00
exynos-dw-mshc.txt mmc: dw_mmc: add support for exynos specific implementation of dw-mshc 2012-10-03 10:05:20 -04:00
fsl-esdhc.txt mmc: dt: Deduplicate binding docs by referencing mmc.txt 2012-07-10 23:04:06 -04:00
fsl-imx-esdhc.txt ARM: dts: imx51-babbage: fix esdhc cd/wp properties 2012-08-23 21:10:23 +08:00
mmc-spi-slot.txt mmc: dt: Deduplicate binding docs by referencing mmc.txt 2012-07-10 23:04:06 -04:00
mmc.txt mmc: dt: add no-1-8-v device tree flag 2012-12-06 13:55:05 -05:00
mmci.txt mmc: dt: Deduplicate binding docs by referencing mmc.txt 2012-07-10 23:04:06 -04:00
mxs-mmc.txt mmc: dt: Deduplicate binding docs by referencing mmc.txt 2012-07-10 23:04:06 -04:00
nvidia,tegra20-sdhci.txt arm-soc: general cleanups 2012-07-23 16:04:15 -07:00
pxa-mmc.txt mmc: pxa-mci: add DT bindings 2012-09-04 13:58:12 -04:00
samsung-sdhci.txt mmc: host: sdhci-s3c: Add support for pinctrl 2012-12-06 13:55:01 -05:00
sdhci-dove.txt mmc: sdhci-dove: DT support for sdhci-dove 2012-09-04 13:58:15 -04:00
sdhci-pxa.txt mmc: sdhci-pxa: Add device tree support 2012-07-21 00:01:47 -04:00
sdhci-spear.txt mmc: sdhci-spear: Add clk_{un}prepare() support 2012-10-07 17:41:45 -04:00
synopsis-dw-mshc.txt mmc: dt: Fix typo in filename 2012-12-06 13:54:52 -05:00
ti-omap-hsmmc.txt mmc: omap_hsmmc: Enable HSPE bit for high speed cards 2012-12-06 13:54:56 -05:00
vt8500-sdmmc.txt mmc: SD/MMC Host Controller for Wondermedia WM8505/WM8650 2012-12-06 13:54:50 -05:00