On Wed, Dec 02, 2020 at 04:25:07PM +0800, Chris Ruehl wrote: > 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@xxxxxxxxxxxx> > --- > 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. Needs a vendor prefix. > > Example: > > -- > 2.20.1 >
