linux-kernel - Re: [PATCH v3 5/7] dt-bindings: soc: starfive: Add StarFive syscon module

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Message-ID: <7527C059-95A2-49EA-AFE0-B089D3651A6B@kernel.org>
Date:   Tue, 09 May 2023 07:35:46 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Xingyu Wu <xingyu.wu@...rfivetech.com>
CC:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Hal Feng <hal.feng@...rfivetech.com>,
        William Qiu <william.qiu@...rfivetech.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v3 5/7] dt-bindings: soc: starfive: Add StarFive syscon module



On 9 May 2023 07:23:18 IST, Xingyu Wu <xingyu.wu@...rfivetech.com> wrote:
>On 2023/5/9 3:24, Conor Dooley wrote:
>> On Mon, Apr 24, 2023 at 06:15:47PM +0100, Conor Dooley wrote:
>>> On Fri, Apr 14, 2023 at 10:41:55AM +0800, Xingyu Wu wrote:
>>> > From: William Qiu <william.qiu@...rfivetech.com>
>>> > 
>>> > Add documentation to describe StarFive System Controller Registers.
>>> > 
>>> > Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
>>> > ---
>>> >  .../soc/starfive/starfive,jh7110-syscon.yaml  | 58 +++++++++++++++++++
>>> >  MAINTAINERS                                   |  6 ++
>>> >  2 files changed, 64 insertions(+)
>>> >  create mode 100644 Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
>>> > 
>>> > diff --git a/Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml b/Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
>>> > new file mode 100644
>>> > index 000000000000..de086e74a229
>>> > --- /dev/null
>>> > +++ b/Documentation/devicetree/bindings/soc/starfive/starfive,jh7110-syscon.yaml
>>> > @@ -0,0 +1,58 @@
>>> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>>> > +%YAML 1.2
>>> > +---
>>> > +$id: http://devicetree.org/schemas/soc/starfive/starfive,jh7110-syscon.yaml#
>>> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> > +
>>> > +title: StarFive JH7110 SoC system controller
>>> > +
>>> > +maintainers:
>>> > +  - William Qiu <william.qiu@...rfivetech.com>
>>> > +
>>> > +description: |
>>> > +  The StarFive JH7110 SoC system controller provides register information such
>>> > +  as offset, mask and shift to configure related modules such as MMC and PCIe.
>>> > +
>>> > +properties:
>>> > +  compatible:
>>> > +    oneOf:
>>> > +      - items:
>>> > +          - enum:
>>> > +              - starfive,jh7110-aon-syscon
>>> > +              - starfive,jh7110-sys-syscon
>>> > +          - const: syscon
>>> > +          - const: simple-mfd
>>> > +      - items:
>>> > +          - const: starfive,jh7110-stg-syscon
>>> > +          - const: syscon
>>> > +
>>> > +  reg:
>>> > +    maxItems: 1
>>> > +
>>> > +  clock-controller:
>>> > +    $ref: /schemas/clock/starfive,jh7110-pll.yaml#
>>> > +    type: object
>>> > +
>>> > +  power-controller:
>>> > +    $ref: /schemas/power/starfive,jh7110-pmu.yaml#
>>> > +    type: object
>>> 
>>> My plan was to grab this patch after the merge window, but there's been
>>> some back and forth [1] about what exactly should be a power-controller
>>> here. Given the merge window is open & I know Emil wants to look at the
>>> various clock bits for the JH7110, I don't think there's a pressing need
>>> for you to do anything here, but figured I'd at least mention how things
>>> are going on this thread too.
>> 
>> To follow up on this, it transpired in that thread that this node, not a
>> child node, should be the power controller.
>> 
>> Up to you StarFive folk how you wish to resend, but I am fine with it
>> being in this series, I shall just not pick up the soc driver patches
>> until the resent binding is applied by Stephen.
>> 
>
>Thanks. I had discussed with changhuang.liang about this. And I will drop
>the 'starfive,jh7110-aon-syscon' and 'power-controller' in next patchset.
>Changhuang will take these in his patchset.

Won't that result in broken bindings, since there's a ref to the pll binding?
Keeping it in the same series (i.e. this one) makes
the most sense to me.

Cheers,
Conor.

>
>Best regards,
>Xingyu Wu
>