On 08/05/2024 15:34, Ravi Gunasekaran wrote:
>
>
> On 5/8/24 5:29 PM, Roger Quadros wrote:
>>
>>
>> On 29/04/2024 15:09, Ravi Gunasekaran wrote:
>>> Add SERDES0 and its wrapper description to support USB3
>>> and SGMII interfaces.
>>>
>>> Signed-off-by: Ravi Gunasekaran <r-gunasekaran@xxxxxx>
>>> ---
>>> arch/arm64/boot/dts/ti/k3-j722s.dtsi | 54 ++++++++++++++++++++++++++++
>>> 1 file changed, 54 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/ti/k3-j722s.dtsi b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
>>> index c75744edb143..beba5a3ea6cc 100644
>>> --- a/arch/arm64/boot/dts/ti/k3-j722s.dtsi
>>> +++ b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
>>> @@ -9,6 +9,7 @@
>>> #include <dt-bindings/interrupt-controller/irq.h>
>>> #include <dt-bindings/interrupt-controller/arm-gic.h>
>>> #include <dt-bindings/soc/ti,sci_pm_domain.h>
>>> +#include <dt-bindings/phy/phy-ti.h>
>>>
>>> #include "k3-am62p5.dtsi"
>>>
>>> @@ -75,6 +76,50 @@
>>> <0x00 0x78000000 0x00 0x78000000 0x00 0x00008000>,
>>> <0x00 0x78100000 0x00 0x78100000 0x00 0x00008000>;
>>> };
>>> +
>>> + serdes_refclk: clock-cmnrefclk {
>>
>> What could be the generic name here?
>>
>
> How about phy-clk or serdes-clk?
> I searched for "fixed-clock" and wide range of naming conventions is followed.
We shouldn't encode the clock function in the name. How about just clk-<n> ?
where <n> is an integer starting from 0 for such fixed-clocks on the platform?
e.g. from arch/arm64/boot/dts/ti/k3-am62p5-sk.dts
tlv320_mclk: clk-0 {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <12288000>;
};
>
>>> + compatible = "fixed-clock";
>>> + #clock-cells = <0>;
>>> + clock-frequency = <0>;
>>> + };
>>> +
>>> + serdes_wiz0: wiz@f000000 {
>>
>> Should generic name be phy?
>
> Since serdes is used for both USB and PCIe,
> I can go with "phy".
>
>>
>>> + compatible = "ti,am64-wiz-10g";
>>> + ranges = <0x0f000000 0x0 0x0f000000 0x00010000>;
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + power-domains = <&k3_pds 279 TI_SCI_PD_EXCLUSIVE>;
>>> + clocks = <&k3_clks 279 0>, <&k3_clks 279 1>, <&serdes_refclk>;
>>> + clock-names = "fck", "core_ref_clk", "ext_ref_clk";
>>> + num-lanes = <1>;
>>> + #reset-cells = <1>;
>>> + #clock-cells = <1>;
>>> +
>>> + assigned-clocks = <&k3_clks 279 1>;
>>> + assigned-clock-parents = <&k3_clks 279 5>;
>>> +
>>> + serdes0: serdes@f000000 {
>>
>> here too?
>
> I could use "phy" here as well.
> https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/qcom/sa8775p.dtsi#L1853
> https://elixir.bootlin.com/linux/latest/source/arch/arm64/boot/dts/renesas/r8a779f0.dtsi#L563
>
>>
>>> + compatible = "ti,j721e-serdes-10g";
>
> [...]
>
>>
>
--
cheers,
-roger
