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 13:30:13 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Jon Hunter <jonathanh@...dia.com>
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Wayne Chang <waynec@...dia.com>, Rob Herring <robh@...nel.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <treding@...dia.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 Fri, Oct 28, 2022 at 12:07:38PM +0100, Jon Hunter wrote:
> 
> On 28/10/2022 10:25, Jon Hunter wrote:
> > 
> > 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.
> 
> 
> Thierry already has a patch to do this [0]. So we should fix that up and
> included in this series.
> 
> Jon
> 
> [0] https://lore.kernel.org/linux-tegra/20211209165339.614498-3-thierry.reding@gmail.com/

I have a v2 with at least some of the comments addressed. I'll go
through them again and send it out. If we can get that reviewed, it can
be included in this series and the Tegra234 addition be applied on top.

Thierry

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