From: Wolfram Sang Date: Sun, 15 Oct 2017 12:46:13 +0000 (+0200) Subject: dt-bindings: mmc: describe new eMMC binding for fixed driver type X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=f7834cbd907abb5d4d84f85dba5a7321e5a37b83;p=linux.git dt-bindings: mmc: describe new eMMC binding for fixed driver type 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 Acked-by: Rob Herring Reviewed-by: Simon Horman Signed-off-by: Ulf Hansson --- diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index b32ade645ad97..94a90b49a6925 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 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"