linux-kernel - Re: [PATCH v3 14/42] power: reset: Add a driver for the ep93xx reset

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Message-ID: <fcfdc6f05926db494ea0105e5523cc21ecfdf4e7.camel@gmail.com>
Date:   Mon, 13 Nov 2023 11:07:01 +0100
From:   Alexander Sverdlin <alexander.sverdlin@...il.com>
To:     Andy Shevchenko <andy@...nel.org>, nikita.shubin@...uefel.me
Cc:     Hartley Sweeten <hsweeten@...ionengravers.com>,
        Lennert Buytenhek <kernel@...tstofly.org>,
        Russell King <linux@...linux.org.uk>,
        Lukasz Majewski <lukma@...x.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
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Subject: Re: [PATCH v3 14/42] power: reset: Add a driver for the ep93xx reset

Hi Andy!

On Fri, 2023-07-21 at 19:37 +0300, Andy Shevchenko wrote:
> > +       /* Issue the reboot */
            ^^^^^^^^^^^^^^^^^^^^^^
This is the relevant comment, one can extend it, but looks already quite
informative considering EP93XX_SYSCON_DEVCFG_SWRST register name.

But Nikita would be able to include more verbose comment if
you'd have a suggestion.

> > +       ep93xx_devcfg_set_clear(priv->map, EP93XX_SYSCON_DEVCFG_SWRST, 0x00);
> > +       ep93xx_devcfg_set_clear(priv->map, 0x00, EP93XX_SYSCON_DEVCFG_SWRST);
> 
> 
> > +       mdelay(1000);
> 
> Atomic?! Such a huge delay must be explained, esp. why it's atomic.

-- 
Alexander Sverdlin.