phy: rockchip: set otapdlysec for in dts

[PATCH 2/2] devicetree: phy: rockchip-emmc add output-tapdelay-select

Posted by Chris Ruehl 4 years, 5 months ago

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>
---
 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 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:
 
-- 
2.20.1

[PATCH 1/2] phy: rockchip-emmc: output tap delay dt property
[PATCH 2/2] devicetree: phy: rockchip-emmc add output-tapdelay-select