[PATCH v2 1/3] dt-bindings: mmc: describe new eMMC binding for fixed driver type
From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: 2017-10-04 17:39:18
Also in:
linux-mmc, linux-renesas-soc
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
Some boards may have to use a certain driver type (or drive strength) to achieve stable eMMC communication. Describe a binding to set this up via DT. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Rob Herring <robh@kernel.org> Cc: devicetree@vger.kernel.org --- Changes since RFC v1: * rebased to mmc/next based on 4.14-rc3 * proper prefix for subject * added Rob's ack 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 b32ade645ad97c..94a90b49a6925d 100644
--- a/Documentation/devicetree/bindings/mmc/mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/mmc.txt@@ -53,6 +53,9 @@ Optional properties: - no-sdio: controller is limited to send sdio cmd during initialization - no-sd: controller is limited to send sd cmd during initialization - no-mmc: controller is limited to send mmc cmd during initialization +- 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). *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"
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2.11.0