linux-kernel - Re: [PATCH v3 5/8] qcom: pmic_glink: enable altmode for SM8550

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Message-ID: <9c3db237-9bec-36e0-8b0c-28062c631068@linaro.org>
Date:   Tue, 13 Jun 2023 15:58:35 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     neil.armstrong@...aro.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-usb@...r.kernel.org
Subject: Re: [PATCH v3 5/8] qcom: pmic_glink: enable altmode for SM8550



On 13.06.2023 15:43, Neil Armstrong wrote:
> On 13/06/2023 13:54, Krzysztof Kozlowski wrote:
>> On 13/06/2023 09:55, Neil Armstrong wrote:
>>> Altmode is also supported for SM8550, allow it.
>>>
>>> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>
>>> ---
>>>   drivers/soc/qcom/pmic_glink.c | 6 +-----
>>>   1 file changed, 1 insertion(+), 5 deletions(-)
>>>
>>> diff --git a/drivers/soc/qcom/pmic_glink.c b/drivers/soc/qcom/pmic_glink.c
>>> index c87056769ebd..8af06bdc6f5a 100644
>>> --- a/drivers/soc/qcom/pmic_glink.c
>>> +++ b/drivers/soc/qcom/pmic_glink.c
>>> @@ -342,13 +342,9 @@ static const unsigned long pmic_glink_sm8450_client_mask = BIT(PMIC_GLINK_CLIENT
>>>                                  BIT(PMIC_GLINK_CLIENT_ALTMODE) |
>>>                                  BIT(PMIC_GLINK_CLIENT_UCSI);
>>>   -/* Do not handle altmode for now on those platforms */
>>> -static const unsigned long pmic_glink_sm8550_client_mask = BIT(PMIC_GLINK_CLIENT_BATT) |
>>> -                               BIT(PMIC_GLINK_CLIENT_UCSI);
>>> -
>>>   static const struct of_device_id pmic_glink_of_match[] = {
>>>       { .compatible = "qcom,sm8450-pmic-glink", .data = &pmic_glink_sm8450_client_mask },
>>
>> Orientation and maybe all of the USB-related properties do not look like
>> sm8450 specific, but PM8350B. That's where CC_OUT pin is. I don't think
>> we represented this correctly, but rather copy-pasted downstream solution...
> 
> We do not interact directly with PM8350B or PM8550B but with pmic_glink who
> does the work work for use, and this is platform specific.
Yep, pmic_glink is totally a firmware construct and not all platforms with
pm8350b or so implement it.

Konrad
> 
> Neil
> 
>>
>> Best regards,
>> Krzysztof
>>
>