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Sender: Guenter Roeck <groeck7@gmail.com>
Date:   Sun, 25 Sep 2022 07:36:43 -0700
From:   Guenter Roeck <linux@roeck-us.net>
To:     Srinivas Neeli <srinivas.neeli@xilinx.com>
Cc:     krzysztof.kozlowski+dt@linaro.org, wim@linux-watchdog.org,
        michal.simek@xilinx.com, shubhrajyoti.datta@xilinx.com,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        devicetree@vger.kernel.org, linux-watchdog@vger.kernel.org,
        git@xilinx.com, git@amd.com,
        Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Subject: Re: [PATCH V2] dt-bindings: watchdog: Convert Xilinx watchdog
 bindings to json-schema
Message-ID: <20220925143643.GA1752768@roeck-us.net>
References: <20220818150637.815-1-srinivas.neeli@xilinx.com>
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On Thu, Aug 18, 2022 at 08:36:37PM +0530, Srinivas Neeli wrote:
> Convert Xilinx watchdog bindings to DT schema format using json-schema
> 
> Signed-off-by: Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
> Signed-off-by: Srinivas Neeli <srinivas.neeli@xilinx.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
> Changes in V2:
> - Updated file name with compatible.
> - Added subsystem name in subject prefix.
> - Address minior comments.
> ---
>  .../bindings/watchdog/of-xilinx-wdt.txt       | 26 -------
>  .../watchdog/xlnx,xps-timebase-wdt.yaml       | 68 +++++++++++++++++++
>  2 files changed, 68 insertions(+), 26 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
>  create mode 100644 Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt b/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
> deleted file mode 100644
> index c6ae9c9d5e3e..000000000000
> --- a/Documentation/devicetree/bindings/watchdog/of-xilinx-wdt.txt
> +++ /dev/null
> @@ -1,26 +0,0 @@
> -Xilinx AXI/PLB soft-core watchdog Device Tree Bindings
> ----------------------------------------------------------
> -
> -Required properties:
> -- compatible		: Should be "xlnx,xps-timebase-wdt-1.00.a" or
> -			  "xlnx,xps-timebase-wdt-1.01.a".
> -- reg			: Physical base address and size
> -
> -Optional properties:
> -- clocks		: Input clock specifier. Refer to common clock
> -			  bindings.
> -- clock-frequency	: Frequency of clock in Hz
> -- xlnx,wdt-enable-once	: 0 - Watchdog can be restarted
> -			  1 - Watchdog can be enabled just once
> -- xlnx,wdt-interval	: Watchdog timeout interval in 2^<val> clock cycles,
> -			  <val> is integer from 8 to 31.
> -
> -Example:
> -axi-timebase-wdt@40100000 {
> -	clock-frequency = <50000000>;
> -	compatible = "xlnx,xps-timebase-wdt-1.00.a";
> -	clocks = <&clkc 15>;
> -	reg = <0x40100000 0x10000>;
> -	xlnx,wdt-enable-once = <0x0>;
> -	xlnx,wdt-interval = <0x1b>;
> -} ;
> diff --git a/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
> new file mode 100644
> index 000000000000..493a1c954707
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/xlnx,xps-timebase-wdt.yaml
> @@ -0,0 +1,68 @@
> +# SPDX-License-Identifier: GPL-2.0-or-later OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/xlnx,xps-timebase-wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Xilinx AXI/PLB softcore and window Watchdog Timer
> +
> +maintainers:
> +  - Shubhrajyoti Datta <shubhrajyoti.datta@xilinx.com>
> +  - Srinivas Neeli <srinivas.neeli@xilinx.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.
> +
> +allOf:
> +  - $ref: watchdog.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - xlnx,xps-timebase-wdt-1.01.a
> +      - xlnx,xps-timebase-wdt-1.00.a
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-frequency:
> +    description: Frequency of clock in Hz
> +
> +  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@40100000 {
> +      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>;
> +    };
> +...