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Re: [PATCH v3 6/8] arm64: dts: qcom: fix usb digital voltage levels

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I think the vdd-levels were an oversight.  The voltages definitely
need to be correct.  As for the corner regulators, I believe the CPR
driver was supposed to address this.  The USB requests a specific
voltage and frequency and based on this the CPR would set the corner
for the regulator.

Stephen, correct me if i am wrong.

On 25 February 2016 at 17:44, Andy Gross <andy.gross@linaro.org> wrote:
> I think the vdd-levels were an oversight.  The voltages definitely need to
> be correct.  As for the corner regulators, I believe the CPR driver was
> supposed to address this.  The USB requests a specific voltage and frequency
> and based on this the CPR would set the corner for the regulator.
>
> Stephen, correct me if i am wrong.
>
> On 25 February 2016 at 05:21, Srinivas Kandagatla
> <srinivas.kandagatla@linaro.org> wrote:
>>
>>
>>
>> On 24/02/16 23:06, Stephen Boyd wrote:
>>>
>>> On 02/23/2016 08:50 AM, Srinivas Kandagatla wrote:
>>>>
>>>> This patch updates the digital voltage levels from corner values to
>>>> microvolts as we are going to use s1 regulator directly for vddcx
>>>> instead of s1_corner.
>>>>
>>>> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>>>> ---
>>>
>>>
>>> What's the plan for corners? Maybe we should remove the voltage setting
>>> from the usb driver or drop the usb node entirely on msm8916 until we
>>> resolve how we're going to handle corners. I'd like to avoid getting
>>> stuck into some DT binding ABI mess here.
>>
>>
>> Andy/Bjorn, any comments on plans on corner regulators?
>>
>> Please note, that this is a patch to fix what is already in the mainline.
>> Without this patch the regulator would be configured with 1uV or 5uV or 7uV
>> which would obviously fail.
>>
>> THB, it does not make sense to drop feature which is functional, and I
>> also agree that we should cleanup some of this mess at some point in time
>> once we all the bits and pieces ready.
>>
>> I was surprised to see these usb bindings(qcom,vdd-levels) existed even
>> before we had concept of corner regulators in mainline kernel. Which also
>> suggests that this driver needs a proper relook once again.
>>
>> Thanks,
>> srini
>
>

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[PATCH v3 0/8] arm64: dts: apq8016 dt patches (Set2). Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 17:50 +0100
  [PATCH v3 4/8] arm64: dts: qcom: add lpass node Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100
  [PATCH v3 6/8] arm64: dts: qcom: fix usb digital voltage levels Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100
    Re: [PATCH v3 6/8] arm64: dts: qcom: fix usb digital voltage levels Stephen Boyd <sboyd@codeaurora.org> - 2016-02-25 00:10 +0100
      Re: [PATCH v3 6/8] arm64: dts: qcom: fix usb digital voltage levels Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-25 12:30 +0100
        Re: [PATCH v3 6/8] arm64: dts: qcom: fix usb digital voltage levels Andy Gross <andy.gross@linaro.org> - 2016-02-26 00:50 +0100
          Re: [PATCH v3 6/8] arm64: dts: qcom: fix usb digital voltage levels Stephen Boyd <sboyd@codeaurora.org> - 2016-02-27 03:00 +0100
  [PATCH v3 5/8] arm64: dts: qcom: apq8016-sbc: enable lpass on DB410c Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100
  [PATCH v3 2/8] arm64: dts: qcom: apq8016-sbc: add usb support Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100
  [PATCH v3 7/8] arm64: dts: qcom: apq8016-sbc: enable bam dma node. Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100
  [PATCH v3 3/8] arm64: dts: qcom: add audio pinctrls Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100
  [PATCH v3 8/8] arm64: dts: qcom: Fix MPP's function used for LED control Srinivas Kandagatla <srinivas.kandagatla@linaro.org> - 2016-02-23 18:00 +0100

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