linux-kernel - Re: [PATCH 0/3] watchdog: sbsa_gwdt: add support for Marvell ac5

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Date: Fri, 15 Dec 2023 11:48:26 -0600
From: Rob Herring <robh@...nel.org>
To: Elad Nachman <enachman@...vell.com>
Cc: wim@...ux-watchdog.org, linux@...ck-us.net, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, gregory.clement@...tlin.com, chris.packham@...iedtelesis.co.nz, andrew@...n.ch, fu.wei@...aro.org, Suravee.Suthikulpanit@....com, al.stone@...aro.org, timur@...eaurora.org, linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, cyuval@...vell.com
Subject: Re: [PATCH 0/3] watchdog: sbsa_gwdt: add support for Marvell ac5

On Thu, Dec 14, 2023 at 05:04:11PM +0200, Elad Nachman wrote:
> From: Elad Nachman <enachman@...vell.com>
> 
> Add support for Marvell ac5/x variant of the ARM
> sbsa global watchdog. This watchdog deviates from
> the standard driver by the following items:
> 
> 1. Registers reside in secure register section.
>    hence access is only possible via SMC calls to ATF.

Oops.

> 2. There are couple more registers which reside in
>    other register areas, which needs to be configured
>    in order for the watchdog to properly generate
>    reset through the SOC.

Your firmware should configure these.

> 
>    The new Marvell compatibility string differentiates between
>    the original sbsa mode of operation and the Marvell mode of
>    operation.
> 
> 
> Elad Nachman (3):
>   dt-bindings: watchdog: add Marvell AC5 watchdog
>   arm64: dts: ac5: add watchdog nodes
>   watchdog: sbsa_gwdt: add support for Marvell ac5
> 
>  .../bindings/watchdog/arm,sbsa-gwdt.yaml      |  52 +++-
>  arch/arm64/boot/dts/marvell/ac5-98dx25xx.dtsi |  14 +
>  arch/arm64/boot/dts/marvell/ac5-98dx35xx.dtsi |   8 +
>  drivers/watchdog/sbsa_gwdt.c                  | 247 ++++++++++++++++--
>  4 files changed, 298 insertions(+), 23 deletions(-)
> 
> -- 
> 2.25.1
>