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mmc: core: Add the vmmc/vmmcq regulator info 

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>
hifive-unleashed-5.1
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:
--------------------