[PATCH 3/3] Documentation: mmc: add description for new no-sd* and no-mmc
From: Shawn Lin <shawn.lin@rock-chips.com>
Date: 2016-07-01 07:48:02
Also in:
linux-mmc, lkml
Subsystem:
multimedia card (mmc), secure digital (sd) and sdio subsystem, open firmware and flattened device tree bindings, the rest · Maintainers:
Ulf Hansson, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
This patch adds description for no-sd, no-sdio, no-mmc. We expect the specific boards adds these in DT to improve the initialization. For instance, for a soldered eMMC slot, we could skip sending SDIO and SD commands to probe its card types as it's always should be the type fo MMC card. Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> --- Documentation/devicetree/bindings/mmc/mmc.txt | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index ecc007a..b2046c6 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt@@ -49,6 +49,9 @@ Optional properties: - 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]. +- no-sdio: skip sending sdio cmd during initialization +- no-sd: skip sending sd cmd during initialization +- no-mmc: skip sending mmc cmd during initialization *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line polarity properties, we have to fix the meaning of the "normal" and "inverted"
--
2.3.7