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Message-ID: <1dc7db21-668a-0247-1b03-016de72cbad8@quicinc.com>
Date:   Tue, 11 Jul 2023 15:38:18 -0700
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Subject: Re: [PATCH v3 2/3] dt-bindings: usb: snps,dwc3: Add
 allow-rtsusp-on-u3 property
Content-Language: en-US
To:     Thinh Nguyen <Thinh.Nguyen@synopsys.com>
CC:     <robh@kernel.org>,
        "stern@rowland.harvard.edu" <stern@rowland.harvard.edu>,
        "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "rogerq@kernel.org" <rogerq@kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
        "quic_wcheng@quicinc.com" <quic_wcheng@quicinc.com>,
        "quic_jackp@quicinc.com" <quic_jackp@quicinc.com>
References: <20230711174320.24058-1-quic_eserrao@quicinc.com>
 <20230711174320.24058-3-quic_eserrao@quicinc.com>
 <20230711215645.6wclz5uffqnlpnnd@synopsys.com>
From:   Elson Serrao <quic_eserrao@quicinc.com>
In-Reply-To: <20230711215645.6wclz5uffqnlpnnd@synopsys.com>
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On 7/11/2023 2:56 PM, Thinh Nguyen wrote:
> On Tue, Jul 11, 2023, Elson Roy Serrao wrote:
>> This property allows dwc3 runtime suspend when bus suspend interrupt
>> is received even with cable connected. This would allow the dwc3
>> controller to enter low power mode during bus suspend scenario.
>>
>> This property would particularly benefit dwc3 IPs where hibernation is
>> not enabled and the dwc3 low power mode entry/exit is handled by the
>> glue driver. The assumption here is that the platform using this dt
>> property is capable of detecting resume events to bring the controller
>> out of suspend.
>>
>> Signed-off-by: Elson Roy Serrao <quic_eserrao@quicinc.com>
>> ---
>>   Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 5 +++++
>>   1 file changed, 5 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>> index a696f23730d3..18ad99a26dd9 100644
>> --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>> +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
>> @@ -403,6 +403,11 @@ properties:
>>       description:
>>         Enable USB remote wakeup.
>>   
>> +  snps,allow-rtsusp-on-u3:
> 
> Please spell out the whole thing as "rtsusp" isn't clear. Also, it's not
> just for U3 right? For highspeed, it's L2.
> 
> How about the name that Roger use: "snps,gadget-keep-connect-sys-sleep"
> 
Done. Will make that modification and upload v4

>> +    description:
>> +      If True then dwc3 runtime suspend is allowed during bus suspend
>> +      case even with the USB cable connected.
>> +
>>   unevaluatedProperties: false
>>   
>>   required:
>> -- 
>> 2.17.1
>>
> 
> Did you Cc Rob, the devicetree maintainer?
> 

My bad. Thanks for pointing this out