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From: Shawn Lin <shawn.lin@rock-chips.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Jaehoon Chung <jh80.chung@samsung.com>,
	Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Adrian Hunter <adrian.hunter@intel.com>,
	linux-mmc@vger.kernel.org, devicetree@vger.kernel.org,
	Shawn Lin <shawn.lin@rock-chips.com>
Subject: [PATCH 1/2] Documentation: mmc: add description for power-delay-ms
Date: Sat, 21 Apr 2018 16:03:43 +0800	[thread overview]
Message-ID: <1524297824-94236-1-git-send-email-shawn.lin@rock-chips.com> (raw)

power-delay-ms woule be used 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 <shawn.lin@rock-chips.com>
---

 Documentation/devicetree/bindings/mmc/mmc.txt | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt
index 467cd7b..8db2ba0 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt
@@ -56,6 +56,8 @@ Optional properties:
 - fixed-emmc-driver-type: for non-removable eMMC, enforce this driver type.
   The value <n> is the driver type as specified in the eMMC specification
   (table 206 in spec version 5.1).
+- power-delay-ms: Tunable delay waiting for I/O signalling and card power supply
+  to be stable. 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

             reply	other threads:[~2018-04-21  8:03 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-04-21  8:03 Shawn Lin [this message]
2018-04-21  8:03 ` [PATCH 2/2] mmc: core: add tunable delay waiting for power to be stable Shawn Lin
2018-04-23  6:24   ` Adrian Hunter
2018-04-23  7:33     ` Shawn Lin
2018-04-23  7:36       ` Adrian Hunter
2018-04-23  7:46         ` Shawn Lin

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