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Subject: Re: [PATCH v6 5/5]  mfd: max77541: Add ADI MAX77541/MAX77540 PMIC
 Support
From:   Nuno =?ISO-8859-1?Q?S=E1?= <noname.nuno@gmail.com>
To:     Mark Brown <broonie@kernel.org>
Cc:     Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        "Sahin, Okan" <Okan.Sahin@analog.com>, Lee Jones <lee@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
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        Jonathan Cameron <jic23@kernel.org>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Cosmin Tanislav <demonsingur@gmail.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Caleb Connolly <caleb.connolly@linaro.org>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
        "Bolboaca, Ramona" <Ramona.Bolboaca@analog.com>,
        ChiYuan Huang <cy_huang@richtek.com>,
        "Tilki, Ibrahim" <Ibrahim.Tilki@analog.com>,
        William Breathitt Gray <william.gray@linaro.org>,
        Arnd Bergmann <arnd@arndb.de>,
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        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-iio@vger.kernel.org" <linux-iio@vger.kernel.org>
Date:   Tue, 28 Mar 2023 16:18:30 +0200
In-Reply-To: <d2bed74b-9eb9-45af-8f45-ad2c2889024a@sirena.org.uk>
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On Tue, 2023-03-28 at 14:46 +0100, Mark Brown wrote:
> On Tue, Mar 28, 2023 at 03:26:44PM +0200, Nuno S=C3=A1 wrote:
>=20
> > IIRC, regmap_read() is not really reentrant and it is used in the
> > IIO
> > driver on the sysfs interface. So, yeah, I think you need the
> > regmap
> > lock and better just leave the config as is. Yes, the lock is opt-
> > out
> > so let's not disable it :)
>=20
> All the regmap operations are fully thread safe.

Even if 'config->disable_locking' is set? I think that is what's being
discussed in here...

- Nuno S=C3=A1