linux-kernel - Re: [PATCH 02/11] dt-bindings: usb: Add NVIDIA Tegra XUSB host controller binding

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Date:   Fri, 28 Oct 2022 10:25:09 +0100
From:   Jon Hunter <jonathanh@...dia.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Wayne Chang <waynec@...dia.com>, Rob Herring <robh@...nel.org>
Cc:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <treding@...dia.com>,
        "thierry.reding@...il.com" <thierry.reding@...il.com>,
        "heikki.krogerus@...ux.intel.com" <heikki.krogerus@...ux.intel.com>,
        Ajay Gupta <ajayg@...dia.com>, "kishon@...com" <kishon@...com>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        "p.zabel@...gutronix.de" <p.zabel@...gutronix.de>,
        "balbi@...nel.org" <balbi@...nel.org>,
        "mathias.nyman@...el.com" <mathias.nyman@...el.com>,
        Jui Chang Kuo <jckuo@...dia.com>,
        "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>,
        Sing-Han Chen <singhanc@...dia.com>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        "linux-phy@...ts.infradead.org" <linux-phy@...ts.infradead.org>,
        "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Subject: Re: [PATCH 02/11] dt-bindings: usb: Add NVIDIA Tegra XUSB host
 controller binding


On 28/10/2022 03:19, Krzysztof Kozlowski wrote:
> On 25/10/2022 04:02, Wayne Chang wrote:
>>
>>>> +  power-domain-names:
>>>> +    items:
>>>> +      - const: xusb_host
>>>> +      - const: xusb_ss
>>>
>>> Drop 'xusb_'.
>>
>> The properties are constant and we use the name to get the power domain.
>>
>> 	tegra->genpd_dev_host = dev_pm_domain_attach_by_name(dev, "xusb_host");
>> 	
>> 	tegra->genpd_dev_ss = dev_pm_domain_attach_by_name(dev, "xusb_ss");
>> 	
>> we might not be able to drop the xusb_
> 
> These are new bindings, so why do say they are "constant"? New bindings
> means you did not use them. If you used them before bindings... what can
> we say? Don't?

Not exactly. However, what we should do here is convert the legacy 
binding doc [0] and replace with this one. But yes we are stuck with the 
'xusb_host' naming.

Jon

[0] Documentation/devicetree/bindings/usb/nvidia,tegra124-xusb.txt

-- 
nvpublic