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mmc: core: Add the vmmc/vmmcq regulator info

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The core MMC code adds two (optional) regulator properites that drivers
should use to get their supplies. This is not documented anywhere so add
information on it.

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ben Dooks 2016-08-01 10:22:11 +01:00 committed by Ulf Hansson
parent 66fe6ac5d5
commit 2f7649f504
1 changed files with 11 additions and 0 deletions
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11
Documentation/devicetree/bindings/mmc/mmc.txt
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@ -75,6 +75,17 @@ Optional SDIO properties:
- wakeup-source: Enables wake up of host system on SDIO IRQ assertion
(Legacy property supported: "enable-sdio-wakeup")
MMC power
---------
Controllers may implement power control from both the connected cards and
the IO signaling (for example to change to high-speed 1.8V signalling). If
the system supports this, then the following two properties should point
to valid regulator nodes:
- vqmmc-supply: supply node for IO line power
- vmmc-supply: supply node for card's power
MMC power sequences:
--------------------