linux-kernel - RE: [PATCH] dt-bindings: Convert Xilinx watchdog bindings to json-schema

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Date:   Thu, 18 Aug 2022 14:52:29 +0000
From:   "Neeli, Srinivas" <srinivas.neeli@....com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Srinivas Neeli <srinivas.neeli@...inx.com>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>,
        "michal.simek@...inx.com" <michal.simek@...inx.com>,
        "shubhrajyoti.datta@...inx.com" <shubhrajyoti.datta@...inx.com>
CC:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        "git@...inx.com" <git@...inx.com>,
        "git (AMD-Xilinx)" <git@....com>,
        "sgoud@...inx.com" <sgoud@...inx.com>,
        Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
Subject: RE: [PATCH] dt-bindings: Convert Xilinx watchdog bindings to
 json-schema

Hi,

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Thursday, August 18, 2022 7:09 PM
> To: Srinivas Neeli <srinivas.neeli@...inx.com>; linux@...ck-us.net;
> krzysztof.kozlowski+dt@...aro.org; wim@...ux-watchdog.org;
> michal.simek@...inx.com; shubhrajyoti.datta@...inx.com
> Cc: linux-kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
> devicetree@...r.kernel.org; linux-watchdog@...r.kernel.org;
> git@...inx.com; git (AMD-Xilinx) <git@....com>; sgoud@...inx.com; Radhey
> Shyam Pandey <radhey.shyam.pandey@...inx.com>
> Subject: Re: [PATCH] dt-bindings: Convert Xilinx watchdog bindings to json-
> schema
> 
> On 18/08/2022 15:42, Srinivas Neeli wrote:
> > Convert Xilinx watchdog bindings to DT schema format using json-schema
> >
> > Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
> > Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>
> 
> Use subject perfixes matching the subsystem (git log --oneline -- ...).
Will update in v2.

> 
> 
> > diff --git
> > a/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase.yaml
> > b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase.yaml
> > new file mode 100644
> > index 000000000000..fd2e3f2df54c
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/watchdog/xlnx,xps-
> timebase.yam
> > +++ l
> 
> xlnx,xps-timebase-wdt.yaml
> (name should be matching compatibles)
Ok, Will update in V2.

> 
> > @@ -0,0 +1,71 @@
> > +# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause %YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/watchdog/xlnx,xps-timebase.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Xilinx AXI/PLB softcore and window Watchdog Timer
> > +
> > +allOf:
> > +  - $ref: "watchdog.yaml#"
> 
> No need for quotes. Put the allOf just above "properties".
Ok, will update in V2.

> 
> > +
> > +maintainers:
> > +  - Shubhrajyoti Datta <shubhrajyoti.datta@...inx.com>
> > +  - Srinivas Neeli <srinivas.neeli@...inx.com>
> > +
> > +description:
> > +  The Timebase watchdog timer(WDT) is a free-running 32 bit counter.
> > +  WDT uses a dual-expiration architecture. After one expiration of
> > +  the timeout interval, an interrupt is generated and the WDT state
> > +  bit is set to one in the status register. If the state bit is not
> > +  cleared (by writing a one to the state bit) before the next
> > +  expiration of the timeout interval, a WDT reset is generated.
> > +
> > +properties:
> > +  compatible:
> > +    oneOf:
> 
> There is no other option, so no need for oneOf.
> 
> > +      - items:
> 
> You do not have items, just one item. Drop items as well.
Ok, will update in V2.

> 
> > +          - enum:
> > +              - xlnx,xps-timebase-wdt-1.01.a
> > +              - xlnx,xps-timebase-wdt-1.00.a
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    minItems: 1
> 
> instead maxItems
Ok, will update in V2.

> 
> > +
> > +  clock-frequency:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> 
> No need for ref. This is a standard property.
Ok, will update in V2.
> 
> > +    description: Frequency of clock in Hz
> 
> Would be useful to add constraints (minimum/maximum and default), but
> that's not a big deal.

There is no limit to minimum and maximum values. So not adding constraints.
> 
> > +
> > +  xlnx,wdt-interval:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    description: Watchdog timeout interval
> > +    minimum: 8
> > +    maximum: 32
> > +
> > +  xlnx,wdt-enable-once:
> > +    $ref: /schemas/types.yaml#/definitions/uint32
> > +    enum: [0, 1]
> > +    description: If watchdog is configured as enable once,
> > +                 then the watchdog cannot be disabled after
> > +                 it has been enabled.
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    watchdog@...00000 {
> > +      compatible = "xlnx,xps-timebase-wdt-1.00.a";
> > +      reg = <0x40100000 0x1000>;
> > +      clock-frequency = <50000000>;
> > +      clocks = <&clkc 15>;
> > +      xlnx,wdt-enable-once = <0x0>;
> > +      xlnx,wdt-interval = <0x1b>;
> > +    } ;
> 
> No need for space after ';'
Ok, will update in V2.

Thanks
Neeli Srinivas
> 
> 
> 
> Best regards,
> Krzysztof