Re: [linux-sunxi] [PATCH 2/3] ARM: dts: sun8i: v3s: enable EHCI/OHCI for Lichee Pi Zero

[Icenowy Zheng <icenowy@aosc.io>]

于 2020年11月23日 GMT+08:00 上午11:37:43, Chen-Yu Tsai <wens@csie.org> 写到:
>On Sun, Nov 22, 2020 at 8:40 AM Icenowy Zheng <icenowy@aosc.io> wrote:
>>
>> As the USB port on Lichee Pi Zero works in the OTG mode, enable the
>> EHCI/OHCI controllers for it.
>
>You should probably mention that the host controllers work better
>than the OTG controller in host mode. Otherwise this change lacks
>justification for enabling two extra hardware blocks.

Our PHY driver do not sense whether ?HCI is enabled or not, so
for host to work it's necessary to be enabled, otherwise the phy
driver will just route USB to unenabled ?HCI and fail.

>
>ChenYu
>
>> Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
>> ---
>>  arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts | 8 ++++++++
>>  1 file changed, 8 insertions(+)
>>
>> diff --git a/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts
>b/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts
>> index 2e4587d26ce5..0cd969194acb 100644
>> --- a/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts
>> +++ b/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts
>> @@ -77,6 +77,10 @@ red_led {
>>         };
>>  };
>>
>> +&ehci0 {
>> +       status = "okay";
>> +};
>> +
>>  &mmc0 {
>>         broken-cd;
>>         bus-width = <4>;
>> @@ -84,6 +88,10 @@ &mmc0 {
>>         status = "okay";
>>  };
>>
>> +&ohci0 {
>> +       status = "okay";
>> +};
>> +
>>  &uart0 {
>>         pinctrl-0 = <&uart0_pb_pins>;
>>         pinctrl-names = "default";
>> --
>> 2.28.0
>>
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