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authorChristoph Muellner <christoph.muellner@theobroma-systems.com>2019-03-01 17:15:31 +0100
committerChristoph Müllner <christophm30@gmail.com>2019-04-07 15:23:03 +0200
commit647949982b5f6af5d995faa74796acd1b5f007e2 (patch)
treea7ae1338230d79ff0f3f926edc4a88124bd7b178
parent8df5f0e7f1bcb0cd55b5449bb8c834e6360ebd29 (diff)
dt-bindings: phy: Add a new property drive-impedance-ohm for RK's emmc PHY
This patch documents the new proprty drive-impedance-ohm for Rockchip's eMMC PHY node. Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com> Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
-rw-r--r--Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt b/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
index e3ea55763b0a..5f5d999dacc3 100644
--- a/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
+++ b/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
@@ -13,6 +13,9 @@ specified by name:
(because most boards can get basic functionality without having
access to it), it is strongly suggested.
- clocks: Should have a phandle to the card clock exported by the SDHCI driver.
+ - drive-impedance-ohm: Specifies the drive impedance in Ohm.
+ Possible values are 33, 40, 50, 66 and 100.
+ If not set, the default value of 50 will be applied.
Example: