Hi,
On Tue, 2015-09-29 at 17:43 +0300, Sergei Shtylyov wrote:
> Hello.
>
> On 09/29/2015 06:01 AM, Chunfeng Yun wrote:
>
> > add a DT binding documentation of usb3.0 phy for MT65xx
> > SoCs from Mediatek.
> >
> > Acked-by: Rob Herring <robh@xxxxxxxxxx>
> > Signed-off-by: Chunfeng Yun <chunfeng.yun@xxxxxxxxxxxx>
> > ---
> > .../devicetree/bindings/phy/phy-mt65xx-usb.txt | 68 ++++++++++++++++++++++
> > 1 file changed, 68 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/phy/phy-mt65xx-usb.txt
> >
> > diff --git a/Documentation/devicetree/bindings/phy/phy-mt65xx-usb.txt b/Documentation/devicetree/bindings/phy/phy-mt65xx-usb.txt
> > new file mode 100644
> > index 0000000..00100cf
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/phy/phy-mt65xx-usb.txt
> > @@ -0,0 +1,68 @@
> > +mt65xx USB3.0 PHY binding
> > +--------------------------
> > +
> > +This binding describes a usb3.0 phy for mt65xx platforms of Medaitek SoC.
> > +
> > +Required properties (controller (parent) node):
> > + - compatible : should be "mediatek,mt8173-u3phy"
> > + - reg : offset and length of register for phy, exclude port's
> > + register.
> > + - clocks : a list of phandle + clock-specifier pairs, one for each
> > + entry in clock-names
> > + - clock-names : must contain
> > + "u3phya_ref": for reference clock of usb3.0 analog phy.
> > +
> > +Required nodes : a sub-node is required for each port the controller
> > + provides. Address range information including the usual
> > + 'reg' property is used inside these nodes to describe
> > + the controller's topology.
> > +
> > +Required properties (port (child) node):
> > +- reg : address and length of the register set for the port.
> > +- #phy-cells : should be 1 (See second example)
> > + cell after port phandle is phy type from:
> > + - PHY_TYPE_USB2
> > + - PHY_TYPE_USB3
> > +
> > +Example:
> > +
> > +u3phy: usb-phy@11290000 {
> > + compatible = "mediatek,mt8173-u3phy";
> > + reg = <0 0x11290000 0 0x800>;
> > + clocks = <&apmixedsys CLK_APMIXED_REF2USB_TX>;
> > + clock-names = "u3phya_ref";
> > + #address-cells = <2>;
> > + #size-cells = <2>;
> > + ranges;
>
> You don't describe the above 3 props neither as mandatory nor optional.
>
I will describe them as mandatory properties later.
> [...]
> > +Specifying phy control of devices
> > +---------------------------------
> > +
> > +Device nodes should specify the configuration required in their "phys"
> > +property, containing a phandle to the phy port node and a device type;
> > +phy-names for each port are optional.
> > +
> > +Example:
> > +
> > +#include <dt-bindings/phy/phy.h>
> > +
> > +usb30: usb@11270000 {
> > + ...
> > + phys = <&phy_port0 PHY_TYPE_USB3>;
> > + phy-names = "usb3-0";
> > + ...
> > +};
>
> Isn't the above already described in
> Documentation/devicetree/bindings/phy/phy-bindings.txt?
>
The usage is already described in phy-bindings.txt.
But many phy binding documents include a simple example, so I add it
too.
Thanks a lot
> MBR, Sergei
>
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