linux-kernel - Re: [PATCH v2 1/4] media: dt-bindings: Document Renesas RZ/G2L CSI-2 block

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Date:   Wed, 21 Sep 2022 13:31:52 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Jacopo Mondi <jacopo@...ndi.org>,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>
Subject: Re: [PATCH v2 1/4] media: dt-bindings: Document Renesas RZ/G2L CSI-2 block

Hi Krzysztof,

On Thu, Sep 8, 2022 at 12:39 PM Krzysztof Kozlowski
<krzysztof.kozlowski@...aro.org> wrote:
>
> On 06/09/2022 01:04, Lad Prabhakar wrote:
> > Document the CSI-2 block which is part of CRU found in Renesas
> > RZ/G2L (and alike) SoCs.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>
> > ---
> > v1 -> v2
> > * Dropped media prefix from subject
> > * Renamed node name csi20 -> csi
> > * Used 4 spaces for indentation in example node
> > * Dropped reset-names and interrupt-names properties
> > * Dropped oneOf from compatible
> > * Included RB tag from Laurent
> >
> > RFC v2 -> v1
> > * Fixed review comments pointed by Rob and Jacopo.
> >
> > RFC v1 -> RFC v2
> > * New patch
> > ---
> >  .../bindings/media/renesas,rzg2l-csi2.yaml    | 140 ++++++++++++++++++
> >  1 file changed, 140 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml b/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml
> > new file mode 100644
> > index 000000000000..79beace4dec2
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/media/renesas,rzg2l-csi2.yaml
> > @@ -0,0 +1,140 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +# Copyright (C) 2022 Renesas Electronics Corp.
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/media/renesas,rzg2l-csi2.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Renesas RZ/G2L (and alike SoC's) MIPI CSI-2 receiver
> > +
> > +maintainers:
> > +  - Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > +
> > +description:
> > +  The CSI-2 receiver device provides MIPI CSI-2 capabilities for the Renesas RZ/G2L
> > +  (and alike SoCs). MIPI CSI-2 is part of the CRU block which is used in conjunction
> > +  with the Image Processing module, which provides the video capture capabilities.
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - enum:
> > +          - renesas,r9a07g044-csi2       # RZ/G2{L,LC}
> > +          - renesas,r9a07g054-csi2       # RZ/V2L
> > +      - const: renesas,rzg2l-csi2
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  interrupts:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +      - description: Internal clock for connecting CRU and MIPI
> > +      - description: CRU Main clock
> > +      - description: CPU Register access clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: sysclk
> > +      - const: vclk
> > +      - const: pclk
>
> One more: drop the "clk" suffixes. Remaining names could be made a bit
> more readable.
>
The clock names are coming from the clock-list document provided along
with the HW manual:

- CRU_SYSCLK
- CRU_VCLK
- CRU_PCLK

Ive dropped the CRU_ prefix, do you still want me to rename them?

Cheers,
Prabhakar