mmc: core: Add the vmmc/vmmcq regulator info
authorBen Dooks <ben.dooks@codethink.co.uk>
Mon, 1 Aug 2016 09:22:11 +0000 (10:22 +0100)
committerUlf Hansson <ulf.hansson@linaro.org>
Mon, 12 Sep 2016 08:35:22 +0000 (10:35 +0200)
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>
Documentation/devicetree/bindings/mmc/mmc.txt

index ac7b6a1d835a24434af945fea051a89719fee0d9..8a377827695bd2d13d169adc162b4129a043a422 100644 (file)
@@ -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:
 --------------------
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