[PATCH 1/1] mmc: core: Add the vmmc/vmmcq regulator info

[Ben Dooks]

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@xxxxxxxxxxxxxxx>
---
 Documentation/devicetree/bindings/mmc/mmc.txt | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index ed23b9b..8cbcbce 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -71,6 +71,17 @@ 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:
 --------------------
-- 
2.8.1