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SubjectRe: [PATCH 2/2] dt-bindings: iio: adc: mediatek,mt2701-auxadc: new 32k clock
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Il 20/10/22 21:30, Daniel Golle ha scritto:
> On Thu, Oct 20, 2022 at 10:28:02AM +0200, AngeloGioacchino Del Regno wrote:
>> Il 19/10/22 16:38, Daniel Golle ha scritto:
>>> Newer MediaTek SoCs need an additional clock to be brought up for
>>> AUXADC to work. Add this new optional clock to
>>> mediatek,mt2701-auxadc.yaml.
>>>
>>> Signed-off-by: Daniel Golle <daniel@makrotopia.org>
>>> ---
>>> .../bindings/iio/adc/mediatek,mt2701-auxadc.yaml | 8 ++++++--
>>> 1 file changed, 6 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml b/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml
>>> index 7f79a06e76f596..c2a1813dd54152 100644
>>> --- a/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml
>>> +++ b/Documentation/devicetree/bindings/iio/adc/mediatek,mt2701-auxadc.yaml
>>> @@ -44,10 +44,14 @@ properties:
>>> maxItems: 1
>>> clocks:
>>> - maxItems: 1
>>> + maxItems: 2
>>> + minItems: 1
>>> clock-names:
>>> - const: main
>>> + items:
>>> + - const: main
>>> + - const: 32k
>>
>> You're adding this for MT7986, and I don't see any 32KHz ADC clock on that SoC.
>> I suppose that your '32k' clock is CLK_INFRA_ADC_FRC_CK, currently parented to
>> 'csw_f26m_sel', so that's 26MHz, not 32KHz.
>>
>> Since you'll need the same changes for thermal as well, I would consider setting
>> "infra_adc_frc" as a parent of "infra_adc_26m", like so:
>>
>> GATE_INFRA1(CLK_INFRA_ADC_26M_CK, "infra_adc_26m", "infra_adc_frc", 20),
>> GATE_INFRA1(CLK_INFRA_ADC_FRC_CK, "infra_adc_frc", "csw_f26m_sel", 21),
>>
>> ...just because there's apparently no reason to have one of them enabled but not
>> the other or, at least, it looks like we *always* need ADC_26M_CK enabled when
>> ADC_FRC_CK is enabled.
>>
>
> Yes, this change is for MT7986 and MT7981, immitating the behavior
> found in MediaTek's SDK sources. Embedding the dependency into the
> clock driver as you have suggested should also be possible as it is
> true that you always need them both and a similar change for the
> thermal driver would be needed as well.
>
> Unless you were planning to do so already I will send a patch with your
> suggested change to drivers/clk/mediatek/clk-mt7986-infracfg.c.
> In any case, this series can be dropped then.
>
> Thank you for the review!
>
>

You're welcome. Nice job sending the clock commit.

For the maintainers:
This series can be abandoned, as that clock dependency was fixed elsewhere.

Regards,
Angelo


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