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

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Message-ID: <7f8305ee-d706-a5a3-0691-1aa296a65125@linaro.org>
Date:   Thu, 18 Aug 2022 16:39:13 +0300
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
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@....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 -- ...).


> 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.yaml

xlnx,xps-timebase-wdt.yaml
(name should be matching compatibles)

> @@ -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".

> +
> +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.

> +          - enum:
> +              - xlnx,xps-timebase-wdt-1.01.a
> +              - xlnx,xps-timebase-wdt-1.00.a
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 1

instead maxItems

> +
> +  clock-frequency:
> +    $ref: /schemas/types.yaml#/definitions/uint32

No need for ref. This is a standard property.

> +    description: Frequency of clock in Hz

Would be useful to add constraints (minimum/maximum and default), but
that's not a big deal.

> +
> +  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 ';'



Best regards,
Krzysztof