From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Lars-Peter Clausen <lars@metafoo.de>
Cc: Mugilraj Dhavachelvan <dmugil2000@gmail.com>,
"Bogdan, Dragos" <Dragos.Bogdan@analog.com>,
Darius <Darius.Berghe@analog.com>,
Rob Herring <robh+dt@kernel.org>,
Jonathan Cameron <jic23@kernel.org>,
Michael Hennerich <Michael.Hennerich@analog.com>,
Guenter Roeck <linux@roeck-us.net>,
Chris Packham <chris.packham@alliedtelesis.co.nz>,
Slawomir Stepien <sst@poczta.fm>,
Krzysztof Kozlowski <krzk@kernel.org>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Alexandru Ardelean <alexandru.ardelean@analog.com>,
devicetree <devicetree@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
linux-iio <linux-iio@vger.kernel.org>
Subject: Re: [PATCH v2 2/2] iio: potentiometer: Add driver support for AD5110
Date: Wed, 11 Aug 2021 19:06:43 +0300 [thread overview]
Message-ID: <CAHp75VcvA=dDOJXSFzgz69JVgbez4Lz27EGOEF7JWUehyrwQrA@mail.gmail.com> (raw)
In-Reply-To: <013bcb79-c496-44d8-2e93-57eb57834ee0@metafoo.de>
On Wed, Aug 11, 2021 at 11:15 AM Lars-Peter Clausen <lars@metafoo.de> wrote:
> On 8/10/21 2:49 PM, Andy Shevchenko wrote:
> >
> >> + data->tol = data->cfg->kohms * (val & GENMASK(6, 0)) * 10 / 8;
> >> + if (!(val & BIT(7)))
> >> + data->tol *= -1;
> > Shouldn't you simple use corresponding sign_extend*()?
> The data is encoded a sign-magnitude. sign_extend() works for two's
> complement numbers.
Good catch!
I'm wondering if it's a good idea to have a sign_magnitude_to_int()
helper or so?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2021-08-11 16:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 7:57 [PATCH v2 0/2] iio: potentiometer: Add driver support for AD5110 Mugilraj Dhavachelvan
2021-08-09 7:57 ` [PATCH v2 1/2] dt-bindings: iio: potentiometer: Add AD5110 in trivial-devices Mugilraj Dhavachelvan
2021-08-13 20:57 ` Rob Herring
2021-08-09 7:57 ` [PATCH v2 2/2] iio: potentiometer: Add driver support for AD5110 Mugilraj Dhavachelvan
2021-08-09 20:05 ` Jonathan Cameron
2021-08-10 12:49 ` Andy Shevchenko
2021-08-11 5:45 ` Mugilraj Dhavachelvan
2021-08-11 7:03 ` Andy Shevchenko
2021-08-11 7:05 ` Andy Shevchenko
2021-08-11 8:11 ` Mugilraj Dhavachelvan
2021-08-11 8:15 ` Lars-Peter Clausen
2021-08-11 16:06 ` Andy Shevchenko [this message]
2021-08-12 16:53 ` Mugilraj Dhavachelvan
2021-08-14 8:18 ` Mugilraj Dhavachelvan
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