| Message ID | 20190307084159.25236-2-christoph.muellner@theobroma-systems.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2,1/4] phy: rockchip-emmc: Allow to set drive impedance via DTS. | expand |
Hi Christoph, Am Donnerstag, 7. März 2019, 09:41:54 CET schrieb Christoph Muellner: > 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> > --- > 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: you might want to adapt the section headline as well, as right now it talks about "Optional clocks", but should likely become the generic "Optional properties" as in other bindings (including moving the clock- binding.txt reference down into the clock elements) Heiko > (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: > >
> On 12.03.2019, at 13:52, Heiko Stuebner <heiko@sntech.de> wrote: > > Hi Christoph, > > Am Donnerstag, 7. März 2019, 09:41:54 CET schrieb Christoph Muellner: >> 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> >> --- >> 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: > > you might want to adapt the section headline as well, as right now it > talks about "Optional clocks", but should likely become the generic > "Optional properties" as in other bindings (including moving the clock- > binding.txt reference down into the clock elements) Thank's for spotting this. Will do for v3. Thanks, Christoph > > > Heiko > >> (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: >> >> > > > >
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: