Documentation: mmc: add mmc-hs400-enhanced-strobe

Let's add some description of mmc-hs400-enhanced-strobe
which can be used to support hs400 enhanced strobe function
introduced by eMMC spec 5.1

Change-Id: I03b8e803071dc7034bddf655892b12eabcaa852a
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index ed23b9bedfdc05425fe7f01486a4f5ed7c7f8e95..a1ed9c4e7235b7ea3af75bdb92896d99dbf4fa98 100644 (file)
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -46,6 +46,7 @@ Optional properties:
 - mmc-hs200-1_2v: eMMC HS200 mode(1.2V I/O) is supported
 - mmc-hs400-1_8v: eMMC HS400 mode(1.8V I/O) is supported
 - mmc-hs400-1_2v: eMMC HS400 mode(1.2V I/O) is supported
+- mmc-hs400-enhanced-strobe: eMMC HS400 Enhanced strobe mode is supported
 - dsr: Value the card's (optional) Driver Stage Register (DSR) should be
   programmed with. Valid range: [0 .. 0xffff].