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Date:   Wed, 6 May 2020 06:45:46 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Evan Benn <evanbenn@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     jwerner@...omium.org, xingyu.chen@...ogic.com,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        devicetree@...r.kernel.org, linux-watchdog@...r.kernel.org
Subject: Re: [PATCH v6 1/2] dt-bindings: watchdog: Add ARM smc wdt for mt8173
 watchdog

On 5/4/20 8:13 PM, Evan Benn wrote:
> This watchdog can be used on ARM systems with a Secure
> Monitor firmware to forward watchdog operations to
> firmware via a Secure Monitor Call.
> 
> Signed-off-by: Evan Benn <evanbenn@...omium.org>
> 
Reviewed-by: Guenter Roeck <linux@...ck-us.net>

> ---
> 
> Changes in v6:
> - Don't use dt default
> 
> Changes in v5:
> - Change compatible to arm,smc-wdt
> 
> Changes in v4:
> - Add arm,smc-id property
> 
> Changes in v3:
> - Change name back to arm
> 
> Changes in v2:
> - Change name arm > mt8173
> 
>  .../bindings/watchdog/arm-smc-wdt.yaml        | 37 +++++++++++++++++++
>  MAINTAINERS                                   |  6 +++
>  2 files changed, 43 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
> new file mode 100644
> index 0000000000000..bec651541e0c8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
> @@ -0,0 +1,37 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/watchdog/arm-smc-wdt.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARM Secure Monitor Call based watchdog
> +
> +allOf:
> +  - $ref: "watchdog.yaml#"
> +
> +maintainers:
> +  - Julius Werner <jwerner@...omium.org>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - arm,smc-wdt
> +  arm,smc-id:
> +    allOf:
> +      - $ref: /schemas/types.yaml#/definitions/uint32
> +    description: |
> +      The ATF smc function id used by the firmware.
> +      Defaults to 0x82003D06 if unset.
> +
> +required:
> +  - compatible
> +
> +examples:
> +  - |
> +    watchdog {
> +      compatible = "arm,smc-wdt";
> +      arm,smc-id = <0x82003D06>;
> +      timeout-sec = <15>;
> +    };
> +
> +...
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b816a453b10eb..0f2b39767bfa9 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1457,6 +1457,12 @@ S:	Maintained
>  F:	Documentation/devicetree/bindings/interrupt-controller/arm,vic.txt
>  F:	drivers/irqchip/irq-vic.c
>  
> +ARM SMC WATCHDOG DRIVER
> +M:	Julius Werner <jwerner@...omium.org>
> +R:	Evan Benn <evanbenn@...omium.org>
> +S:	Maintained
> +F:	devicetree/bindings/watchdog/arm-smc-wdt.yaml
> +
>  ARM SMMU DRIVERS
>  M:	Will Deacon <will@...nel.org>
>  R:	Robin Murphy <robin.murphy@....com>
> 

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