linux-kernel - Re: [PATCH 1/2] dt-bindings: Add Qualcomm USB Super-Speed PHY bindings

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Date:   Fri, 21 Dec 2018 08:40:29 +0100
From:   Jorge Ramirez <jorge.ramirez-ortiz@...aro.org>
To:     Jack Pham <jackp@...eaurora.org>, Rob Herring <robh@...nel.org>
Cc:     Andy Gross <andy.gross@...aro.org>, gregkh@...uxfoundation.org,
        mark.rutland@....com, kishon@...com, linux-usb@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        shawn.guo@...aro.org, vkoul@...nel.org,
        Manu Gautam <mgautam@...eaurora.org>,
        Sriharsha Allenki <sallenki@...eaurora.org>
Subject: Re: [PATCH 1/2] dt-bindings: Add Qualcomm USB Super-Speed PHY
 bindings

On 12/20/18 18:37, Jack Pham wrote:
> Hi Rob, Jorge,
>
> On Thu, Dec 20, 2018 at 11:05:31AM -0600, Rob Herring wrote:
>> On Fri, Dec 07, 2018 at 10:55:57AM +0100, Jorge Ramirez-Ortiz wrote:
>>> Binding description for Qualcomm's Synopsys 1.0.0 super-speed PHY
>>> controller embedded in QCS404.
>>>
>>> Based on Sriharsha Allenki's <sallenki@...eaurora.org> original
>>> definitions.
>>>
>>> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>
>>> Reviewed-by: Vinod Koul <vkoul@...nel.org>
>>> ---
>>>   .../devicetree/bindings/usb/qcom,usb-ssphy.txt     | 78 ++++++++++++++++++++++
>>>   1 file changed, 78 insertions(+)
>>>   create mode 100644 Documentation/devicetree/bindings/usb/qcom,usb-ssphy.txt
>>>
>>> diff --git a/Documentation/devicetree/bindings/usb/qcom,usb-ssphy.txt b/Documentation/devicetree/bindings/usb/qcom,usb-ssphy.txt
>>> new file mode 100644
>>> index 0000000..fcf4e01
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/usb/qcom,usb-ssphy.txt
>>> @@ -0,0 +1,78 @@
>>> +Qualcomm Synopsys 1.0.0 SS phy controller
>>> +===========================================
>>> +
>>> +Synopsys 1.0.0 ss phy controller supports SS usb connectivity on Qualcomm
>>> +chipsets
>>> +
>>> +Required properties:
>>> +
>>> +- compatible:
>>> +    Value type: <string>
>>> +    Definition: Should contain "qcom,usb-ssphy".
>> What is "qcom,dwc3-ss-usb-phy" which already exists then?
> Uh, apparently only the bindings doc is there but the driver never
> landed. I guess it fell through the cracks nearly 4 years ago.
>
> https://lore.kernel.org/patchwork/patch/499502/
>
> Jorge, does Andy's version of this driver at all resemble what can be
> used for QCS404?

the drivers seem quite different but I'll give it a go as well and 
compare (it is my understanding that the controller is the same - I will 
have access to the hardware documentation soon to compare)

but I'll come back to you on this.

>
> Jack