On Fri, Jul 14, 2023 at 06:14:05PM +0800, Samin Guo wrote: > The motorcomm phy (YT8531) supports the ability to adjust the drive > strength of the rx_clk/rx_data. > > The YT8531 RGMII LDO voltage supports 1.8V/3.3V, and the > LDO voltage can be configured with hardware pull-up resistors to match > the SOC voltage (usually 1.8V). The software can read the registers > 0xA001 obtain the current LDO voltage value. > > When we configure the drive strength, we need to read the current LDO > voltage value to ensure that it is a legal value at that LDO voltage. > > Reviewed-by: Hal Feng <hal.feng@xxxxxxxxxxxxxxxx> > Signed-off-by: Samin Guo <samin.guo@xxxxxxxxxxxxxxxx> > --- > .../bindings/net/motorcomm,yt8xxx.yaml | 46 +++++++++++++++++++ > 1 file changed, 46 insertions(+) > > diff --git a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml > index 157e3bbcaf6f..097bf143af35 100644 > --- a/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml > +++ b/Documentation/devicetree/bindings/net/motorcomm,yt8xxx.yaml > @@ -52,6 +52,52 @@ properties: > for a timer. > type: boolean > > + motorcomm,rx-clk-driver-strength: > + $ref: /schemas/types.yaml#/definitions/uint32 As the units are uA, drop the type and add '-microamp' suffix. 'motorcomm,rx-clk-drv-microamp' is probably sufficient. > + description: | > + drive strength of rx_clk rgmii pad. > + |----------------------------------| > + | rx_clk ds map table | > + |----------------------------------| > + | DS(3b) | wol@1.8v | wol@3.3v | > + |________|_________________________| > + | | current(uA)| current(uA)| > + | 000 | 1200 | 3070 | > + | 001 | 2100 | 4080 | > + | 010 | 2700 | 4370 | > + | 011 | 2910 | 4680 | > + | 100 | 3110 | 5020 | > + | 101 | 3600 | 5450 | > + | 110 | 3970 | 5740 | > + | 111 | 4350 | 6140 | > + |--------|------------|------------| > + enum: [ 1200, 2100, 2700, 2910, 3070, 3110, 3600, 3970, > + 4080, 4350, 4370, 4680, 5020, 5450, 5740, 6140 ] > + default: 2910 > + > + motorcomm,rx-data-driver-strength: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: | > + drive strength of rx_data/rx_ctl rgmii pad. > + |----------------------------------| > + | rx_data ds map table | > + |----------------------------------| > + | DS(3b) | wol@1.8v | wol@3.3v | > + |________|_________________________| > + | | current(uA)| current(uA)| > + | 000 | 1200 | 3070 | > + | 001 | 2100 | 4080 | > + | 010 | 2700 | 4370 | > + | 011 | 2910 | 4680 | > + | 100 | 3110 | 5020 | > + | 101 | 3600 | 5450 | > + | 110 | 3970 | 5740 | > + | 111 | 4350 | 6140 | > + |--------|------------|------------| > + enum: [ 1200, 2100, 2700, 2910, 3070, 3110, 3600, 3970, > + 4080, 4350, 4370, 4680, 5020, 5450, 5740, 6140 ] > + default: 2910 > + > motorcomm,tx-clk-adj-enabled: > description: | > This configuration is mainly to adapt to VF2 with JH7110 SoC. > -- > 2.17.1 >
