Re: [PATCH v2] arm64: dts: mediatek: mt8195: Fix dtbs_check error for tphy

[Macpaul Lin <macpaul.lin@mediatek.com>]

On 10/8/24 17:09, AngeloGioacchino Del Regno wrote:
> Il 08/10/24 09:15, Macpaul Lin ha scritto:
>> The u3phy1 node in mt8195.dtsi was triggering a dtbs_check error.
>> The error message was:
>>    t-phy@11e30000: 'power-domains' does not match any of the regexes:
>>      '^(usb|pcie|sata)-phy@[0-9a-f]+$', 'pinctrl-[0-9]+'
>> Fix this issue by dropping 'power-domains' of u3phy1 node.
>>
>> This is because MediaTek tphy dose not need to add mtcmos.  It is not
>> necessary to add 'power-domains'. If the power of the tphy is turned off,
>> it will affect other functions. From the current USB hardware design
>> perspective, even if mtcmos is added to the phy, it is always on.
>>
>> Fixes: 37f2582883be ("arm64: dts: Add mediatek SoC mt8195 and 
>> evaluation board")
>> Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
> 
> Reviewed-by: AngeloGioacchino Del Regno 
> <angelogioacchino.delregno@collabora.com>

Sorry for bothering, it seems MediaTek internal still have some
discussion about according to Conor's suggestion:

[1] 
https://lore.kernel.org/lkml/20241008-disorder-slacking-d8196ceb68f7@spud/T/#mccf978d76f52cc26970f3f3be6120055e4698fe6

Please don't to pick this patch until if MediaTek could have some
conclusions.

>> ---
>>   arch/arm64/boot/dts/mediatek/mt8195.dtsi | 1 -
>>   1 file changed, 1 deletion(-)
>>
>> Changes for v2:
>>   - Add detail description of the tphy design for explaining the reason
>>     of this change.
>>
>> diff --git a/arch/arm64/boot/dts/mediatek/mt8195.dtsi 
>> b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
>> index ade685ed2190..1c6f08dde31c 100644
>> --- a/arch/arm64/boot/dts/mediatek/mt8195.dtsi
>> +++ b/arch/arm64/boot/dts/mediatek/mt8195.dtsi
>> @@ -1920,7 +1920,6 @@ u3phy1: t-phy@11e30000 {
>>               #address-cells = <1>;
>>               #size-cells = <1>;
>>               ranges = <0 0 0x11e30000 0xe00>;
>> -            power-domains = <&spm MT8195_POWER_DOMAIN_SSUSB_PCIE_PHY>;
>>               status = "disabled";
>>               u2port1: usb-phy@0 {
> 
> 

Thanks!
Macpaul Lin