于 2018年7月7日 GMT+08:00 上午11:35:22, Chen-Yu Tsai <wens@xxxxxxxx> 写到:
>On Fri, Jul 6, 2018 at 11:38 PM, Icenowy Zheng <icenowy@xxxxxxx> wrote:
>> Allwinner H6 SoC features USB3 functionality, with a DWC3 controller
>and
>> a custom PHY.
>>
>> Add device tree nodes for them.
>>
>> Signed-off-by: Icenowy Zheng <icenowy@xxxxxxx>
>> ---
>> Changes in v2:
>> - Rebased on top of the USB2 support patch.
>> - Dropped the dwc3-of-simple device.
>>
>> arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 24
>++++++++++++++++++++
>> 1 file changed, 24 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
>b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
>> index 62fc0f5e10ba..6738e97ee37f 100644
>> --- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
>> +++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
>> @@ -229,6 +229,30 @@
>> status = "disabled";
>> };
>>
>> + dwc3: dwc3 {
>> + compatible = "snps,dwc3";
>> + reg = <0x5200000 0x10000>;
>> + interrupts = <GIC_SPI 26
>IRQ_TYPE_LEVEL_HIGH>;
>> + /* The only clock is shared. */
>> + clocks = <&ccu CLK_BUS_XHCI>,
>> + <&ccu CLK_BUS_XHCI>,
>> + <&ccu CLK_BUS_XHCI>;
>> + clock-names = "ref", "bus_early", "suspend";
>
>The diagram in the user manual also shows the low speed 32k oscillator
>being fed into DWC3. Maybe someone with more knowledge of what the IP
>block expects can give us a clue about which one of these it is.
If possible, I think it's suspend clock.
I have checked RK3399 clk tree and USB3 ref is just a gate
on 24M osc, and bus clock is surely CLK_BUS_XHCI.
>
>ChenYu
>
>> + resets = <&ccu RST_BUS_XHCI>;
>> + /*
>> + * The datasheet of the chip doesn't declare
>the
>> + * peripheral function, and there's no boards
>known
>> + * to have a USB Type-B port routed to the
>port.
>> + * In addition, no one has tested the
>peripheral
>> + * function yet.
>> + * So set the dr_mode to "host" in the DTSI
>file.
>> + */
>> + dr_mode = "host";
>> + phys = <&usb3phy>;
>> + phy-names = "usb3-phy";
>> + status = "disabled";
>> + };
>> +
>> usb3phy: phy@5210000 {
>> compatible = "allwinner,sun50i-h6-usb3-phy";
>> reg = <0x5210000 0x10000>;
>> --
>> 2.17.1
>>
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