linux-kernel - Re: [PATCH 1/8] dt-bindings: power: Add MT8365 power domains

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Date:   Mon, 20 Feb 2023 21:10:23 +0100
From:   Markus Schneider-Pargmann <msp@...libre.com>
To:     Matthias Brugger <matthias.bgg@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chun-Jie Chen <chun-jie.chen@...iatek.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Fabien Parent <parent.f@...il.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Fabien Parent <fparent@...libre.com>
Subject: Re: [PATCH 1/8] dt-bindings: power: Add MT8365 power domains

Hi Matthias,

On Fri, Feb 03, 2023 at 01:31:58PM +0100, Matthias Brugger wrote:
> 
> 
> On 05/01/2023 18:07, Markus Schneider-Pargmann wrote:
> > From: Fabien Parent <fparent@...libre.com>
> > 
> > Add power domains dt-bindings for MT8365.
> > 
> > Signed-off-by: Fabien Parent <fparent@...libre.com>
> > Signed-off-by: Markus Schneider-Pargmann <msp@...libre.com>
> > ---
> > 
> > Notes:
> >      Changes in v4:
> >      - Add infracfg_nao as it is used by mt8365
> >      Changes in v3:
> >      - Renamed mt8365-power.h to mediatek,mt8365-power.h
> >      Changes in v2:
> >      - Made include/dt-bindings/power/mt8365-power.h dual-license.
> > 
> >   .../power/mediatek,power-controller.yaml      |  6 ++++++
> >   .../dt-bindings/power/mediatek,mt8365-power.h | 19 +++++++++++++++++++
> >   2 files changed, 25 insertions(+)
> >   create mode 100644 include/dt-bindings/power/mediatek,mt8365-power.h
> > 
> > diff --git a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
> > index 605ec7ab5f63..a496c43cfa16 100644
> > --- a/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
> > +++ b/Documentation/devicetree/bindings/power/mediatek,power-controller.yaml
> > @@ -30,6 +30,7 @@ properties:
> >         - mediatek,mt8186-power-controller
> >         - mediatek,mt8192-power-controller
> >         - mediatek,mt8195-power-controller
> > +      - mediatek,mt8365-power-controller
> >     '#power-domain-cells':
> >       const: 1
> > @@ -86,6 +87,7 @@ $defs:
> >                 "include/dt-bindings/power/mt8183-power.h" - for MT8183 type power domain.
> >                 "include/dt-bindings/power/mt8192-power.h" - for MT8192 type power domain.
> >                 "include/dt-bindings/power/mt8195-power.h" - for MT8195 type power domain.
> > +              "include/dt-bindings/power/mediatek,mt8365-power.h" - for MT8365 type power domain.
> >           maxItems: 1
> >         clocks:
> > @@ -113,6 +115,10 @@ $defs:
> >           $ref: /schemas/types.yaml#/definitions/phandle
> >           description: phandle to the device containing the INFRACFG register range.
> > +      mediatek,infracfg-nao:
> > +        $ref: /schemas/types.yaml#/definitions/phandle
> > +        description: phandle to the device containing the INFRACFG-NAO register range.
> > +
> 
> 
> Hm, so we have mediatek,mt8365-infracfg defined in mt8365-sys-clock. Also
> the description talks about infracfg_ao. You now introduce INFRACFG-NAO. Is
> that just another system clock block, or is this covered with the
> mediatek,mt8365-infracfg binding?
> 
> We would need to clean that up.

Looking through the datasheet I don't see any clock related registers
for infracfg-nao. So I don't think it is another system clock block. It
seems to be a lot of status registers and debug registers, but not all
of them. It really doesn't seem to have a specific topic here. So from
my point of view it is just a syscon block. Should I add a
mediatek,mt8365-infracfg-nao compatible to the syscon binding
documentation?

Thanks,
Markus

> 
> Regards,
> Matthias
> 
> >         mediatek,smi:
> >           $ref: /schemas/types.yaml#/definitions/phandle
> >           description: phandle to the device containing the SMI register range.
> > diff --git a/include/dt-bindings/power/mediatek,mt8365-power.h b/include/dt-bindings/power/mediatek,mt8365-power.h
> > new file mode 100644
> > index 000000000000..e6cfd0ec7871
> > --- /dev/null
> > +++ b/include/dt-bindings/power/mediatek,mt8365-power.h
> > @@ -0,0 +1,19 @@
> > +/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
> > +/*
> > + * Copyright (c) 2022 MediaTek Inc.
> > + */
> > +
> > +#ifndef _DT_BINDINGS_POWER_MT8365_POWER_H
> > +#define _DT_BINDINGS_POWER_MT8365_POWER_H
> > +
> > +#define MT8365_POWER_DOMAIN_MM		0
> > +#define MT8365_POWER_DOMAIN_CONN	1
> > +#define MT8365_POWER_DOMAIN_MFG		2
> > +#define MT8365_POWER_DOMAIN_AUDIO	3
> > +#define MT8365_POWER_DOMAIN_CAM		4
> > +#define MT8365_POWER_DOMAIN_DSP		5
> > +#define MT8365_POWER_DOMAIN_VDEC	6
> > +#define MT8365_POWER_DOMAIN_VENC	7
> > +#define MT8365_POWER_DOMAIN_APU		8
> > +
> > +#endif /* _DT_BINDINGS_POWER_MT8365_POWER_H */