diff options
| author | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2019-03-01 17:15:31 +0100 |
|---|---|---|
| committer | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2019-04-30 20:02:02 +0200 |
| commit | d0f8c46c8694791395d3f77e58e051b259aff188 (patch) | |
| tree | 336cdf87d1bb4cc918d0b3f42df375f49648ecc6 | |
| parent | ad232d45107128fbd338f97c2ece41d995afeee3 (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.txt | 3 |
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 73eda5620190..ea456c489834 100644 --- a/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt +++ b/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt @@ -16,6 +16,9 @@ Optional Properties: If not assigned any freq, default use 200000000Hz. - dr-sel: select the drive strength of phy IO. - opdelay: select the output delay count number for clk IO and data IO + - 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: |