linux-kernel - Re: [PATCH v8 01/11] dt-bindings: clock: meson: add A1 PLL clock controller bindings

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Date:   Fri, 2 Dec 2022 15:26:50 +0300
From:   Dmitry Rokosov <ddrokosov@...rdevices.ru>
To:     Jerome Brunet <jbrunet@...libre.com>
CC:     <neil.armstrong@...aro.org>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <khilman@...libre.com>,
        <martin.blumenstingl@...glemail.com>, <jian.hu@...ogic.com>,
        <kernel@...rdevices.ru>, <rockosov@...il.com>,
        <linux-amlogic@...ts.infradead.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v8 01/11] dt-bindings: clock: meson: add A1 PLL clock
 controller bindings

On Fri, Dec 02, 2022 at 12:11:53PM +0100, Jerome Brunet wrote:
> 
> On Fri 02 Dec 2022 at 01:56, Dmitry Rokosov <ddrokosov@...rdevices.ru> wrote:
> 
> > From: Jian Hu <jian.hu@...ogic.com>
> >
> > Add the documentation to support Amlogic A1 PLL clock driver,
> > and add A1 PLL clock controller bindings.
> >
> > Signed-off-by: Jian Hu <jian.hu@...ogic.com>
> > Signed-off-by: Dmitry Rokosov <ddrokosov@...rdevices.ru>
> > ---
> >  .../bindings/clock/amlogic,a1-pll-clkc.yaml   | 52 +++++++++++++++++++
> >  include/dt-bindings/clock/a1-pll-clkc.h       | 16 ++++++
> >  2 files changed, 68 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/clock/amlogic,a1-pll-clkc.yaml
> >  create mode 100644 include/dt-bindings/clock/a1-pll-clkc.h
> >
> > diff --git a/Documentation/devicetree/bindings/clock/amlogic,a1-pll-clkc.yaml b/Documentation/devicetree/bindings/clock/amlogic,a1-pll-clkc.yaml
> > new file mode 100644
> > index 000000000000..d67250fbeece
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/clock/amlogic,a1-pll-clkc.yaml
> > @@ -0,0 +1,52 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: "http://devicetree.org/schemas/amlogic,a1-pll-clkc.yaml#"
> > +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> > +
> > +title: Amlogic Meson A/C serials PLL Clock Control Unit Device Tree Bindings
> > +
> > +maintainers:
> > +  - Neil Armstrong <narmstrong@...libre.com>
> > +  - Jerome Brunet <jbrunet@...libre.com>
> > +  - Jian Hu <jian.hu@...n.hu.com>
> > +
> > +properties:
> > +  compatible:
> > +    const: amlogic,a1-pll-clkc
> > +
> > +  "#clock-cells":
> > +    const: 1
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    items:
> > +     - description: input xtal_fixpll
> > +     - description: input xtal_hifipll
> > +
> > +  clock-names:
> > +    items:
> > +      - const: xtal_fixpll
> > +      - const: xtal_hifipll
> 
> Do we really need the "xtal_" prefix ?
> 
> Seems like the clock is the PLL, not the xtal
> 

This name was formed from specification registers description. Register
CLKTREE_SYS_OSCIN_CTRL has "gate en" field which calls "xtal ->
HIFIPLL", therefore if was transformed to xtal_hifipll name.

But I agree with you, that "hifipll" is better name choice.
 
-- 
Thank you,
Dmitry