On 19/08/2022 10:47, wei.fang@xxxxxxx wrote: > From: Wei Fang <wei.fang@xxxxxxx> > > TJA110x REF_CLK can be configured as interface reference clock > intput or output when the RMII mode enabled. This patch add the > property to make the REF_CLK can be configurable. > > Signed-off-by: Wei Fang <wei.fang@xxxxxxx> > --- > .../devicetree/bindings/net/nxp,tja11xx.yaml | 17 +++++++++++++++++ > 1 file changed, 17 insertions(+) > > diff --git a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml > index d51da24f3505..c51ee52033e8 100644 > --- a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml > +++ b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml > @@ -31,6 +31,22 @@ patternProperties: > description: > The ID number for the child PHY. Should be +1 of parent PHY. > > + nxp,rmii_refclk_in: No underscores in properties. > + type: boolean > + description: | > + The REF_CLK is provided for both transmitted and receivced data typo: received > + in RMII mode. This clock signal is provided by the PHY and is > + typically derived from an external 25MHz crystal. Alternatively, > + a 50MHz clock signal generated by an external oscillator can be > + connected to pin REF_CLK. A third option is to connect a 25MHz > + clock to pin CLK_IN_OUT. So, the REF_CLK should be configured > + as input or output according to the actual circuit connection. > + If present, indicates that the REF_CLK will be configured as > + interface reference clock input when RMII mode enabled. > + If not present, the REF_CLK will be configured as interface > + reference clock output when RMII mode enabled. > + Only supported on TJA1100 and TJA1101. Then disallow it on other variants. Shouldn't this be just "clocks" property? Best regards, Krzysztof
