Re: [PATCH v9 01/10] dt-bindings: usb: qcom,dwc3: Add bindings for SC8280 Multiport

From: Johan Hovold <johan@kernel.org>
To: Krishna Kurapati PSSNV <quic_kriskura@quicinc.com>
Cc: Rob Herring <robh+dt@kernel.org>,
	Thinh Nguyen <Thinh.Nguyen@synopsys.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Andy Gross <agross@kernel.org>,
	Bjorn Andersson <andersson@kernel.org>,
	Konrad Dybcio <konrad.dybcio@linaro.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Felipe Balbi <balbi@kernel.org>,
	Wesley Cheng <quic_wcheng@quicinc.com>,
	linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
	quic_pkondeti@quicinc.com, quic_ppratap@quicinc.com,
	quic_jackp@quicinc.com, quic_harshq@quicinc.com,
	ahalaney@redhat.com, quic_shazhuss@quicinc.com
Subject: Re: [PATCH v9 01/10] dt-bindings: usb: qcom,dwc3: Add bindings for SC8280 Multiport
Date: Fri, 21 Jul 2023 10:10:38 +0200	[thread overview]
Message-ID: <ZLo9flzTCha5iU-K@hovoldconsulting.com> (raw)
In-Reply-To: <548e35a7-984d-a62f-ea4b-a5aeace8009a@quicinc.com>

On Mon, Jul 03, 2023 at 12:41:59AM +0530, Krishna Kurapati PSSNV wrote:
> On 6/27/2023 9:08 PM, Johan Hovold wrote:
> > On Tue, Jun 27, 2023 at 01:20:59PM +0200, Johan Hovold wrote:
> >> On Wed, Jun 21, 2023 at 10:06:19AM +0530, Krishna Kurapati wrote:
> > 
> >>> +          items:
> >>> +            - const: dp1_hs_phy_irq
> >>> +            - const: dm1_hs_phy_irq
> >>> +            - const: dp2_hs_phy_irq
> >>> +            - const: dm2_hs_phy_irq
> >>> +            - const: dp3_hs_phy_irq
> >>> +            - const: dm4_hs_phy_irq
> >>> +            - const: dp4_hs_phy_irq
> >>> +            - const: dm4_hs_phy_irq
> >>> +            - const: ss1_phy_irq
> >>> +            - const: ss2_phy_irq
> >>> +            - const: pwr_event_1
> >>> +            - const: pwr_event_2
> >>> +            - const: pwr_event_3
> >>> +            - const: pwr_event_4
> >>
> >> The naming here is inconsistent and interrupts should not have "_irq"
> >> suffixes (even if some of the current ones do for historical reasons).
> >>
> >> I believe these should be named
> >>
> >> 	pwr_event_1
> >> 	dp_hs_phy_1
> >> 	dm_hs_phy_1
> >> 	ss_phy_1
> >>
> >> 	pwr_event_2
> >> 	dp_hs_phy_2
> >> 	dm_hs_phy_2
> >> 	ss_phy_2
> >>
> >> 	pwr_event_3
> >> 	dp_hs_phy_3
> >> 	dm_hs_phy_3
> >>
> >> 	pwr_event_4
> >> 	dp_hs_phy_4
> >> 	dm_hs_phy_4
> >>
> >> or similar and be grouped by port while using the the
> >> qcom,sc8280xp-dwc ordering for the individual lines.
> > 
> > Perhaps the ordering you suggested is fine too, but I'd probably move
> > the pwr_event ones first to match qcom,sc8280xp-dwc then, that is:
> > 
> >   	pwr_event_1
> >   	pwr_event_2
> >   	pwr_event_3
> >   	pwr_event_4
> >   	dp_hs_phy_1
> >   	dm_hs_phy_1
> >   	dp_hs_phy_2
> >   	dm_hs_phy_2
> >   	dp_hs_phy_3
> >   	dm_hs_phy_3
> >   	dp_hs_phy_4
> >   	dm_hs_phy_4
> >   	ss_phy_1
> >   	ss_phy_2
> > 
> > so we have them grouped as pwr_event followed by HS and with SS last.
> > 
> >> Side note: Please note how the above interrupt properties can also be
> >> used to infer the number of HS and SS ports.

> Can't we just cleanup all at once later ? Might not be a good idea for 
> some properties in the file to have _irq and for some to not have it. I 
> will modify the order though.

No, DT bindings generally need to be as correct as possible from the
start as they form an ABI. So please drop the _irq suffix from all of
the new indexed names.

Johan