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Subject: Re: [PATCH v2 1/2] dt-bindings: Add Qualcomm USB Super-Speed PHY
 bindings
To:     Rob Herring <robh@kernel.org>
Cc:     gregkh@linuxfoundation.org, mark.rutland@arm.com, kishon@ti.com,
        jackp@codeaurora.org, andy.gross@linaro.org, swboyd@chromium.org,
        shawn.guo@linaro.org, vkoul@kernel.org, bjorn.andersson@linaro.org,
        khasim.mohammed@linaro.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org,
        linux-kernel@vger.kernel.org
References: <1548761715-4004-1-git-send-email-jorge.ramirez-ortiz@linaro.org>
 <1548761715-4004-2-git-send-email-jorge.ramirez-ortiz@linaro.org>
 <20190130200218.GB5908@bogus>
From:   Jorge Ramirez <jorge.ramirez-ortiz@linaro.org>
Message-ID: <f6823a9e-f2d0-ca5b-a2f8-eb362221ab81@linaro.org>
Date:   Tue, 5 Feb 2019 12:02:03 +0100
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On 1/30/19 21:02, Rob Herring wrote:
> On Tue, Jan 29, 2019 at 12:35:14PM +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@codeaurora.org> original
>> definitions.
>>
>> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org>
>> ---
>>  .../devicetree/bindings/usb/qcom,usb-ssphy.txt     | 73 ++++++++++++++++++++++
>>  1 file changed, 73 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..8ef6e39
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/usb/qcom,usb-ssphy.txt
>> @@ -0,0 +1,73 @@
>> +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".
> 
> This is in no way specific enough.

ok. will remove the old unused bindings and reuse qcom,dwc3-ss-usb-phy

> 
>> +
>> +- reg:
>> +    Value type: <prop-encoded-array>
>> +    Definition: USB PHY base address and length of the register map.
>> +
>> +- #phy-cells:
>> +    Value type: <u32>
>> +    Definition: Should be 0. See phy/phy-bindings.txt for details.
>> +
>> +- clocks:
>> +    Value type: <prop-encoded-array>
>> +    Definition: See clock-bindings.txt section "consumers". List of
>> +		 three clock specifiers for reference, phy core and
>> +		 pipe clocks.
>> +
>> +- clock-names:
>> +    Value type: <string>
>> +    Definition: Names of the clocks in 1-1 correspondence with the "clocks"
>> +		 property. Must contain "ref", "phy" and "pipe".
>> +
>> +- vdd-supply:
>> +    Value type: <phandle>
>> +    Definition: phandle to the regulator VDD supply node.
>> +
>> +- vdda1p8-supply:
>> +    Value type: <phandle>
>> +    Definition: phandle to the regulator 1.8V supply node.
>> +
>> +
>> +Optional child nodes:
>> +
>> +- vbus-supply:
>> +    Value type: <phandle>
>> +    Definition: phandle to the VBUS supply node.
> 
> Does the phy actually get supplied by Vbus? If not, then Vbus supply 
> should be defined in a USB connector node.

yes per the documentation vbus can optionally be routed to the phy to
drive a signal to the controller.


> 
>> +
>> +- resets:
>> +    Value type: <prop-encoded-array>
>> +    Definition: See reset.txt section "consumers". PHY reset specifiers
>> +		 for phy core and COR resets.
> 
> COR or COM?

com
> 
> Looks to me the order is reversed.

yes

> 
>> +
>> +- reset-names:
>> +    Value type: <string>
>> +    Definition: Names of the resets in 1-1 correspondence with the "resets"
>> +		 property. Must contain "com" and "phy".
>> +
>> +Example:
>> +
>> +usb3_phy: phy@78000 {
> 
> usb3-phy@...

ok

> 
>> +	compatible = "qcom,usb-ssphy";
>> +	reg = <0x78000 0x400>;
>> +	#phy-cells = <0>;
>> +	clocks = <&rpmcc RPM_SMD_LN_BB_CLK>,
>> +		 <&gcc GCC_USB_HS_PHY_CFG_AHB_CLK>,
>> +		 <&gcc GCC_USB3_PHY_PIPE_CLK>;
>> +	clock-names = "ref", "phy", "pipe";
>> +	resets = <&gcc GCC_USB3_PHY_BCR>,
>> +		 <&gcc GCC_USB3PHY_PHY_BCR>;
>> +	reset-names = "com", "phy";
>> +	vdd-supply = <&vreg_l3_1p05>;
>> +	vdda1p8-supply = <&vreg_l5_1p8>;
>> +	vbus-supply = <&usb3_vbus_reg>;
>> +};
>> -- 
>> 2.7.4
>>
>