linux-kernel - Re: [PATCH v5 7/9] watchdog: max77620: add support for the max77714 variant

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Date:   Tue, 21 Dec 2021 07:06:04 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Luca Ceresoli <luca@...aceresoli.net>, linux-kernel@...r.kernel.org
Cc:     linux-rtc@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, Lee Jones <lee.jones@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Chiwoong Byun <woong.byun@...sung.com>,
        Laxman Dewangan <ldewangan@...dia.com>,
        Randy Dunlap <rdunlap@...radead.org>
Subject: Re: [PATCH v5 7/9] watchdog: max77620: add support for the max77714
 variant

On 12/11/21 12:34 PM, Luca Ceresoli wrote:
> The MAX77714 is a MFD chip whose watchdog has the same programming
> procedures as the MAX77620 watchdog, but most register offsets and bit
> masks are different, as well as some features.
> 
> Support the MAX77714 watchdog by adding a variant description table holding
> the differences.
> 
> All the features implemented by this driver are available on the MAX77714
> except for the lack of a WDTOFFC bit. Instead of using a "HAS_*" flag we
> handle this by holding in the cnfg_glbl2_cfg_bits struct field the bits
> (i.e. the features) to enable in the CNFG_GLBL2 register. These bits differ
> among the two models. This implementation allows to avoid any conditional
> code, keeping the execution flow unchanged.
> 
> Signed-off-by: Luca Ceresoli <luca@...aceresoli.net>
> 


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