diff options
| author | Wolfram Sang <wsa+renesas@sang-engineering.com> | 2017-10-15 14:46:13 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-10-30 11:50:38 +0100 |
| commit | f7834cbd907abb5d4d84f85dba5a7321e5a37b83 (patch) | |
| tree | e0e0f1ec57e502a39ed7bfe929d00d51e4acf31a /Documentation | |
| parent | 2d87ddd7b63e276a2e0a11788fce9e91c4d23a86 (diff) | |
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 <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/mmc.txt | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index b32ade645ad9..94a90b49a692 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" |