From 10a0ed7a945054c2c4951e7a938b5f5498964820 Mon Sep 17 00:00:00 2001 From: Shawn Lin Date: Tue, 8 May 2018 09:04:19 +0800 Subject: [PATCH] Documentation: mmc: addtional description for post-power-on-delay-ms 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 Reviewed-by: Rob Herring Signed-off-by: Ulf Hansson --- 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 dbe23b12ea1c..f5a0923b34ca 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -58,6 +58,10 @@ 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" -- 2.45.2