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authorChris Ruehl <chris.ruehl@gtsys.com.hk>2020-12-02 16:25:07 +0800
committerVinod Koul <vkoul@kernel.org>2020-12-05 13:40:48 +0530
commit86e21677e775bcf10d676e0e93710ce17d52fdb7 (patch)
tree51477a744b18cb2cfc82d866fbc7bbab272a5401 /Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
parenta8cef928276bbf8254d0067cda21dbe6210ea1aa (diff)
devicetree: phy: rockchip-emmc add output-tapdelay-select
Update the rockchip-emmc-phy.txt and add the u32 property 'output-tapdelay-select'. This allow to set the otapdlysec register. Tested with our customized rk3399 board to tune eMMC. Signed-off-by: Chris Ruehl <chris.ruehl@gtsys.com.hk> Link: https://lore.kernel.org/r/20201202082507.3536-3-chris.ruehl@gtsys.com.hk Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt')
-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 3e4d2d79a65d..00aa2d349e55 100644
--- a/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
+++ b/Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
@@ -18,6 +18,9 @@ Optional properties:
If not set, the default value of 50 will be applied.
- enable-strobe-pulldown: Enable internal pull-down for the strobe line.
If not set, pull-down is not used.
+ - output-tapdelay-select: Specifies the phyctrl_otapdlysec register.
+ If not set, the register defaults to 0x4.
+ Maximum value 0xf.
Example: