linux-kernel - Re: [PATCH 01/10] dt-bindings: watchdog: sp-805: Convert to Json-schema

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Message-ID: <CAL_JsqJfY=DTKeuGmkwn-tcDG_SAbHJqASH2zKgwU-78qqwxOw@mail.gmail.com>
Date:   Tue, 8 Sep 2020 11:25:38 -0600
From:   Rob Herring <robh+dt@...nel.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     devicetree@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Viresh Kumar <vireshk@...nel.org>,
        LINUX-WATCHDOG <linux-watchdog@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Chanho Min <chanho.min@....com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Liviu Dudau <liviu.dudau@....com>,
        Li Yang <leoyang.li@....com>, Shawn Guo <shawnguo@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        "maintainer:BROADCOM BCM7XXX ARM ARCHITECTURE" 
        <bcm-kernel-feedback-list@...adcom.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Wei Xu <xuwei5@...ilicon.com>
Subject: Re: [PATCH 01/10] dt-bindings: watchdog: sp-805: Convert to Json-schema

On Tue, Sep 8, 2020 at 11:20 AM Rob Herring <robh+dt@...nel.org> wrote:
>
> On Fri, Aug 28, 2020 at 7:06 AM Andre Przywara <andre.przywara@....com> wrote:
> >
> > Convert the ARM SP-805 watchdog IP DT binding over to Json-schema.
> >
> > A straight-forward conversion, but the requirement for providing two
> > clocks got strengthened from "should" to "must".
> >
> > Signed-off-by: Andre Przywara <andre.przywara@....com>
> > ---
> >  .../bindings/watchdog/arm,sp805.txt           | 32 --------
> >  .../bindings/watchdog/arm,sp805.yaml          | 75 +++++++++++++++++++
> >  2 files changed, 75 insertions(+), 32 deletions(-)
> >  delete mode 100644 Documentation/devicetree/bindings/watchdog/arm,sp805.txt
> >  create mode 100644 Documentation/devicetree/bindings/watchdog/arm,sp805.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/watchdog/arm,sp805.txt b/Documentation/devicetree/bindings/watchdog/arm,sp805.txt
> > deleted file mode 100644
> > index bee6f1f0e41b..000000000000
> > --- a/Documentation/devicetree/bindings/watchdog/arm,sp805.txt
> > +++ /dev/null
> > @@ -1,32 +0,0 @@
> > -ARM AMBA Primecell SP805 Watchdog
> > -
> > -SP805 WDT is a ARM Primecell Peripheral and has a standard-id register that
> > -can be used to identify the peripheral type, vendor, and revision.
> > -This value can be used for driver matching.
> > -
> > -As SP805 WDT is a primecell IP, it follows the base bindings specified in
> > -'arm/primecell.txt'
> > -
> > -Required properties:
> > -- compatible:  Should be "arm,sp805" & "arm,primecell"
> > -- reg:         Should contain location and length for watchdog timer register
> > -- clocks:      Clocks driving the watchdog timer hardware. This list should be
> > -               2 clocks. With 2 clocks, the order is wdog_clk, apb_pclk
> > -               wdog_clk can be equal to or be a sub-multiple of the apb_pclk
> > -               frequency
> > -- clock-names: Shall be "wdog_clk" for first clock and "apb_pclk" for the
> > -               second one
> > -
> > -Optional properties:
> > -- interrupts:  Should specify WDT interrupt number
> > -- timeout-sec: Should specify default WDT timeout in seconds. If unset, the
> > -               default timeout is determined by the driver
> > -
> > -Example:
> > -       watchdog@...90000 {
> > -               compatible = "arm,sp805", "arm,primecell";
> > -               reg = <0x66090000 0x1000>;
> > -               interrupts = <GIC_SPI 406 IRQ_TYPE_LEVEL_HIGH>;
> > -               clocks = <&wdt_clk>, <&apb_pclk>;
> > -               clock-names = "wdog_clk", "apb_pclk";
> > -       };
> > diff --git a/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml b/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml
> > new file mode 100644
> > index 000000000000..980e155d3387
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/watchdog/arm,sp805.yaml
> > @@ -0,0 +1,75 @@
> > +# SPDX-License-Identifier: GPL-2.0
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/watchdog/arm,sp805.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: ARM AMBA Primecell SP805 Watchdog
> > +
> > +maintainers:
> > +  - Viresh Kumar <vireshk@...nel.org>
> > +
> > +description: |+
> > +  The Arm SP805 IP implements a watchdog device, which triggers an interrupt
> > +  after a configurable time period. If that interrupt has not been serviced
> > +  when the next interrupt would be triggered, the reset signal is asserted.
> > +
> > +allOf:
> > +  - $ref: /schemas/arm/primecell.yaml#
>
> Should also ref watchdog.yaml here.

Actually, you should also drop primecell.yaml as that will get applied
already with the 'arm,primecell' compatible match.

Rob