On Thu, Oct 24, 2019 at 02:40:41PM +0300, Roger Quadros wrote: > This is an optional GPIO, if specified will be used to > swap lane 0 and lane 1 based on GPIO status. This is required > to achieve plug flip support for USB Type-C. > > Type-C companions typically need some time after the cable is > plugged before and before they reflect the correct status of > Type-C plug orientation on the DIR line. > > Type-C Spec specifies CC attachment debounce time (tCCDebounce) > of 100 ms (min) to 200 ms (max). > > Allow the DT node to specify the time (in ms) that we need > to wait before sampling the DIR line. > > Signed-off-by: Roger Quadros <rogerq@xxxxxx> > Cc: Rob Herring <robh@xxxxxxxxxx> > --- > .../devicetree/bindings/phy/ti,phy-j721e-wiz.yaml | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml b/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml > index 8a1eccee6c1d..5dab0010bcdf 100644 > --- a/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml > +++ b/Documentation/devicetree/bindings/phy/ti,phy-j721e-wiz.yaml > @@ -53,6 +53,21 @@ properties: > assigned-clock-parents: > maxItems: 2 > > + typec-dir-gpios: TI specific or could be generic? > + maxItems: 1 > + description: > + GPIO to signal Type-C cable orientation for lane swap. > + If GPIO is active, lane 0 and lane 1 of SERDES will be swapped to > + achieve the funtionality of an exernal type-C plug flip mux. s/exernal/external/ > + > + typec-dir-debounce: Needs '-ms' suffix. > + $ref: '/schemas/types.yaml#/definitions/uint32' then you can drop this because standard units have type already. > + description: > + Number of milliseconds to wait before sampling > + typec-dir-gpio. If not specified, the GPIO will be sampled ASAP. > + Type-C spec states minimum CC pin debounce of 100 ms and maximum > + of 200 ms. Express this as constraints: minimum: 100 maximum: 200 default: ??? If the spec minimum is 100ms, then doesn't sampling ASAP violate the spec? > + > patternProperties: > "^pll[0|1]_refclk$": > type: object > -- > Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. > Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki >
