linux-kernel - Re: [PATCH] dt-bindings: usb: dwc3: Add interrupt-names to include hibernation interrupt

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Message-ID: <83c104d1-6c09-1744-0621-a50a745a0744@amd.com>
Date:   Fri, 23 Sep 2022 11:34:31 +0200
From:   Michal Simek <michal.simek@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "Mehta, Piyush" <piyush.mehta@....com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "balbi@...nel.org" <balbi@...nel.org>
CC:     "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Paladugu, Siva Durga Prasad" <siva.durga.prasad.paladugu@....com>,
        Manish Narani <manish.narani@...inx.com>
Subject: Re: [PATCH] dt-bindings: usb: dwc3: Add interrupt-names to include
 hibernation interrupt

Hi Krzysztof,

On 9/23/22 11:22, Krzysztof Kozlowski wrote:
> On 23/09/2022 06:38, Mehta, Piyush wrote:
>>> Thanks,
>>> Michal
>>
>> Enabling wakeup in zynqMp we need to put the core into hibernation, as versal don't have hibernation concept, but we require interrupt for wakeup.
>> We have a versal platform where we are not using hibernation, but system wake up we need the interrupt. For this interrupt-name enum would be:
>> - enum [host, peripheral, otg, usb-wakeup]
>>
>> zynqMp :
>> - enum [host, peripheral, otg, hiber]
>>
>> Versal:
>> - enum [host, peripheral, otg, usb-wakeup]
> 
> That's a different name you use now...

It is small confusion.

We have dwc3 in 3 SOCs. ZynqMP/Versal and Versal NET.

In ZynqMP currently we are define it as
interrupt-names = "dwc_usb3", "otg", "hiber";
(https://github.com/Xilinx/u-boot-xlnx/blob/master/arch/arm/dts/zynqmp.dtsi#L996)
where I think we should be able to convert it
host, peripheral, otg, hiber

And Versal (Versal NET is the same as Versal) is now using
interrupt-names = "dwc_usb3","otg","usb-wakeup";
https://github.com/Xilinx/u-boot-xlnx/blob/master/arch/arm/dts/versal.dtsi#L597

where it can be converted to
host, peripheral, otg, usb-wakeup

but the last usb-wakeup entry is the problematic one.
You mentioned before if this is SOC specific maybe we should consider to create 
new compatible string to match this.

Thanks,
Michal