All of lore.kernel.org
 help / color / mirror / Atom feed
From: Doug Anderson <dianders@chromium.org>
To: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Rob Herring <robh+dt@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	 Matthias Kaehlcke <mka@chromium.org>,
	Alexandru M Stan <amstan@chromium.org>,
	patches@lists.linux.dev,
	 linux-arm-msm <linux-arm-msm@vger.kernel.org>,
	Julius Werner <jwerner@chromium.org>,
	 Andy Gross <agross@kernel.org>,
	Stephen Boyd <swboyd@chromium.org>,
	 Krzysztof Kozlowski <krzk+dt@kernel.org>,
	Rajendra Nayak <quic_rjendra@quicinc.com>,
	 "Joseph S . Barrera III" <joebar@chromium.org>,
	 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
	<devicetree@vger.kernel.org>, Stephen Boyd <sboyd@codeaurora.org>,
	 LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v4 3/5] dt-bindings: arm: qcom: Add sc7180 Chromebook board bindings
Date: Mon, 23 May 2022 09:16:34 -0700	[thread overview]
Message-ID: <CAD=FV=UC+eFZaUiPQNKBMmLmjx21YpH4Yeg3Yz9NiDLXnh+nDg@mail.gmail.com> (raw)
In-Reply-To: <7c1598a9-476d-0115-ab13-11dfa0d89436@linaro.org>

Hi,

On Sun, May 22, 2022 at 12:57 AM Krzysztof Kozlowski
<krzysztof.kozlowski@linaro.org> wrote:
>
> On 20/05/2022 23:38, Douglas Anderson wrote:
> > This copy-pastes compatibles from sc7180-based boards from the device
> > trees to the yaml file so that `make dtbs_check` will be happy.
> >
> > NOTES:
> > - I make no attempt to try to share an "item" for all sc7180 based
> >   Chromebooks. Because of the revision matching scheme used by the
> >   Chromebook bootloader, at times we need a different number of
> >   revisions listed.
> > - Some of the odd entries in here (like google,homestar-rev23 or the
> >   fact that "Google Lazor Limozeen without Touchscreen" changed from
> >   sku5 to sku6) are not typos but simply reflect reality.
> > - Many revisions of boards here never actually went to consumers, but
> >   they are still in use within various companies that were involved in
> >   Chromebook development. Since Chromebooks are developed with an
> >   "upstream first" methodology, having these revisions supported with
> >   upstream Linux is important. Making it easy for Chromebooks to be
> >   developed with an "upstream first" methodology is valuable to the
> >   upstream community because it improves the quality of upstream and
> >   gets Chromebooks supported with vanilla upstream faster.
> >
> > One other note here is that, though the bootloader effectively treats
> > the list of compatibles in a given device tree as unordered, some
> > people would prefer future boards to list higher-numbered revisions
> > first in the list. Chromebooks here are not changing and typically
> > list lower revisions first just to avoid churn.
> >
> > Signed-off-by: Douglas Anderson <dianders@chromium.org>
> > Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
> > ---
> >
> > (no changes since v3)
> >
> > Changes in v3:
> > - Split link to Chromebook boot doc into a separate patch.
> > - Added a note to desc about revision ordering within a device tree.
> >
> > Changes in v2:
> > - Add link to doc about how Chromebook devicetrees work.
> > - Use a "description" instead of a comment for each item.
> > - Use the marketing name instead of the code name where possible.
> >
> >  .../devicetree/bindings/arm/qcom.yaml         | 182 +++++++++++++++++-
> >  1 file changed, 181 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/arm/qcom.yaml b/Documentation/devicetree/bindings/arm/qcom.yaml
> > index 5ac28e11ea7b..01e40ea40724 100644
> > --- a/Documentation/devicetree/bindings/arm/qcom.yaml
> > +++ b/Documentation/devicetree/bindings/arm/qcom.yaml
> > @@ -219,11 +219,191 @@ properties:
> >                - qcom,ipq8074-hk10-c2
> >            - const: qcom,ipq8074
> >
> > -      - items:
> > +      - description: Qualcomm Technologies, Inc. SC7180 IDP
> > +        items:
> >            - enum:
> >                - qcom,sc7180-idp
> >            - const: qcom,sc7180
> >
> > +      - description: HP Chromebook x2 11c (rev1 - 2)
> > +        items:
> > +          - const: google,coachz-rev1
> > +          - const: google,coachz-rev2
> > +          - const: qcom,sc7180
> > +
> > +      - description: HP Chromebook x2 11c (newest rev)
> > +        items:
> > +          - const: google,coachz
> > +          - const: qcom,sc7180
> > +
> > +      - description: HP Chromebook x2 11c with LTE (rev1 - 2)
> > +        items:
> > +          - const: google,coachz-rev1-sku0
> > +          - const: google,coachz-rev2-sku0
> > +          - const: qcom,sc7180
> > +
> > +      - description: HP Chromebook x2 11c with LTE (newest rev)
> > +        items:
> > +          - const: google,coachz-sku0
> > +          - const: qcom,sc7180
> > +
> > +      - description: Lenovo Chromebook Duet 5 13 (rev2)
> > +        items:
> > +          - const: google,homestar-rev2
> > +          - const: google,homestar-rev23
> > +          - const: qcom,sc7180
> > +
> > +      - description: Lenovo Chromebook Duet 5 13 (rev3)
> > +        items:
> > +          - const: google,homestar-rev3
> > +          - const: qcom,sc7180
> > +
> > +      - description: Lenovo Chromebook Duet 5 13 (newest rev)
> > +        items:
> > +          - const: google,homestar
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 (rev0)
> > +        items:
> > +          - const: google,lazor-rev0
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 (rev1 - 2)
> > +        items:
> > +          - const: google,lazor-rev1
> > +          - const: google,lazor-rev2
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 (rev3 - 8)
> > +        items:
> > +          - const: google,lazor-rev3
> > +          - const: google,lazor-rev4
> > +          - const: google,lazor-rev5
> > +          - const: google,lazor-rev6
> > +          - const: google,lazor-rev7
> > +          - const: google,lazor-rev8
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 (newest rev)
> > +        items:
> > +          - const: google,lazor
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 with KB Backlight (rev1 - 2)
> > +        items:
> > +          - const: google,lazor-rev1-sku2
> > +          - const: google,lazor-rev2-sku2
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 with KB Backlight (rev3 - 8)
> > +        items:
> > +          - const: google,lazor-rev3-sku2
> > +          - const: google,lazor-rev4-sku2
> > +          - const: google,lazor-rev5-sku2
> > +          - const: google,lazor-rev6-sku2
> > +          - const: google,lazor-rev7-sku2
> > +          - const: google,lazor-rev8-sku2
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 with KB Backlight (newest rev)
> > +        items:
> > +          - const: google,lazor-sku2
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 with LTE (rev1 - 2)
> > +        items:
> > +          - const: google,lazor-rev1-sku0
> > +          - const: google,lazor-rev2-sku0
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 with LTE (rev3 - 8)
> > +        items:
> > +          - const: google,lazor-rev3-sku0
> > +          - const: google,lazor-rev4-sku0
> > +          - const: google,lazor-rev5-sku0
> > +          - const: google,lazor-rev6-sku0
> > +          - const: google,lazor-rev7-sku0
> > +          - const: google,lazor-rev8-sku0
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook Spin 513 with LTE (newest rev)
> > +        items:
> > +          - const: google,lazor-sku0
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook 511 (rev4 - rev8)
> > +        items:
> > +          - const: google,lazor-rev4-sku4
> > +          - const: google,lazor-rev5-sku4
> > +          - const: google,lazor-rev6-sku4
> > +          - const: google,lazor-rev7-sku4
> > +          - const: google,lazor-rev8-sku4
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook 511 (newest rev)
> > +        items:
> > +          - const: google,lazor-sku4
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook 511 without Touchscreen (rev4)
> > +        items:
> > +          - const: google,lazor-rev4-sku5
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook 511 without Touchscreen (rev5 - rev8)
> > +        items:
> > +          - const: google,lazor-rev5-sku5
> > +          - const: google,lazor-rev5-sku6
> > +          - const: google,lazor-rev6-sku6
> > +          - const: google,lazor-rev7-sku6
> > +          - const: google,lazor-rev8-sku6
> > +          - const: qcom,sc7180
> > +
> > +      - description: Acer Chromebook 511 without Touchscreen (newest rev)
> > +        items:
> > +          - const: google,lazor-sku6
> > +          - const: qcom,sc7180
> > +
> > +      - description: Sharp Dynabook Chromebook C1 (rev1)
> > +        items:
> > +          - const: google,pompom-rev1
> > +          - const: qcom,sc7180
> > +
> > +      - description: Sharp Dynabook Chromebook C1 (rev2)
> > +        items:
> > +          - const: google,pompom-rev2
>
> I understand why you do not share "item" (your first notes) for some of
> boards, but I don't get why "google,pompom-rev1" cannot be combined with
> "google,pompom-rev2". Do you see any chances to alter the bindings for
> these two boards?
>
> The same for other such cases (not newest revision).

Yeah, I thought about it when I was writing the file and decided
against it. I guess it's just a style decision. If we combine these
two then I guess it raises the question: do we only combine entries
that list a single revision if they're the same board, or do we have
one uber entry at the end of the list that combines all
single-revision sc7180 Chromebooks? ...and in either case, what should
the description be?

Personally, though it takes up more lines of code, I prefer the
simplicity of having each entry here correspond to a single dts file.

Unless you feel really strongly about it, I'd tend to leave the
decision here to Bjorn.

-Doug

  reply	other threads:[~2022-05-23 16:24 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-20 21:38 [PATCH v4 1/5] dt-bindings: Document how Chromebooks with depthcharge boot Douglas Anderson
2022-05-20 21:38 ` [PATCH v4 2/5] dt-bindings: arm: qcom: Mention that Chromebooks use a different scheme Douglas Anderson
2022-05-22  7:54   ` Krzysztof Kozlowski
2022-05-20 21:38 ` [PATCH v4 3/5] dt-bindings: arm: qcom: Add sc7180 Chromebook board bindings Douglas Anderson
2022-05-22  7:57   ` Krzysztof Kozlowski
2022-05-23 16:16     ` Doug Anderson [this message]
2022-05-24  9:34       ` Krzysztof Kozlowski
2022-05-24 23:00         ` Doug Anderson
2022-05-20 21:38 ` [PATCH v4 4/5] dt-bindings: arm: qcom: Add / fix sc7280 " Douglas Anderson
2022-06-22  8:27   ` Krzysztof Kozlowski
2022-06-22 13:51     ` Doug Anderson
2022-05-20 21:38 ` [PATCH v4 5/5] dt-bindings: arm: qcom: Add more sc7180 Chromebook " Douglas Anderson
2022-05-22  8:01   ` Krzysztof Kozlowski
2022-05-23 16:19     ` Doug Anderson
2022-06-01 23:26       ` Rob Herring
2022-06-27 20:02 ` [PATCH v4 1/5] dt-bindings: Document how Chromebooks with depthcharge boot Bjorn Andersson

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAD=FV=UC+eFZaUiPQNKBMmLmjx21YpH4Yeg3Yz9NiDLXnh+nDg@mail.gmail.com' \
    --to=dianders@chromium.org \
    --cc=agross@kernel.org \
    --cc=amstan@chromium.org \
    --cc=bjorn.andersson@linaro.org \
    --cc=devicetree@vger.kernel.org \
    --cc=joebar@chromium.org \
    --cc=jwerner@chromium.org \
    --cc=krzk+dt@kernel.org \
    --cc=krzysztof.kozlowski@linaro.org \
    --cc=linux-arm-msm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mka@chromium.org \
    --cc=patches@lists.linux.dev \
    --cc=quic_rjendra@quicinc.com \
    --cc=robh+dt@kernel.org \
    --cc=sboyd@codeaurora.org \
    --cc=swboyd@chromium.org \
    --subject='Re: [PATCH v4 3/5] dt-bindings: arm: qcom: Add sc7180 Chromebook board bindings' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.