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

[Macpaul Lin]

On 10/9/24 17:21, Macpaul Lin wrote:
> 
> 
> 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 at 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 at mediatek.com>
>>
>> Reviewed-by: AngeloGioacchino Del Regno 
>> <angelogioacchino.delregno at 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.

Update: This patch could be dropped since the correct fix in
TPHY's DT Schema has been accepted.

[2] 
https://lore.kernel.org/all/172917936283.288841.9548294790735623997.b4-ty@kernel.org/

>>> ---
>>>   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 at 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 at 0 {
>>
>>
> 
> Thanks!
> Macpaul Lin

Thanks!
Macpaul Lin