From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Shawn Lin Subject: [PATCH v3 1/2] Documentation: mmc: addtional description for post-power-on-delay-ms Date: Tue, 8 May 2018 09:04:19 +0800 Message-Id: <1525741460-109455-1-git-send-email-shawn.lin@rock-chips.com> To: Ulf Hansson Cc: Rob Herring , linux-mmc@vger.kernel.org, Wolfram Sang , Adrian Hunter , devicetree@vger.kernel.org, Shawn Lin List-ID: post-power-on-delay-ms woule be reused to substitute the hard-coded 10ms delay waiting for power supply to be stable, specificed by individual platform/board. Default to 10ms as before, if no available. Signed-off-by: Shawn Lin --- Changes in v3: - reused post-power-on-delay-ms suggested by Rob Changes in v2: None Documentation/devicetree/bindings/mmc/mmc.txt | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 467cd7b..a1d0cf4 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -56,6 +56,10 @@ Optional properties: - fixed-emmc-driver-type: for non-removable eMMC, enforce this driver type. The value is the driver type as specified in the eMMC specification (table 206 in spec version 5.1). +- post-power-on-delay-ms : It was invented for MMC pwrseq-simple which could + be referred to mmc-pwrseq-simple.txt. But now it's reused as a tunable delay + waiting for I/O signalling and card power supply to be stable, regardless of + whether pwrseq-simple is used. Default to 10ms if no available. *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" -- 1.9.1