This patch documents the new proprty drive-impedance-ohm for
Rockchip's eMMC PHY node.
Signed-off-by: Christoph Muellner <[email protected]>
Signed-off-by: Philipp Tomsich <[email protected]>
---
Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt | 3 +++
1 file changed, 3 insertions(+)
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:
--
2.11.0