linux-kernel - Re: [PATCH v5 2/8] iio: core: add fixed point parsing with 64-bit parts

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Message-ID: <aXeC8r71LqdpozDG@smile.fi.intel.com>
Date: Mon, 26 Jan 2026 17:06:26 +0200
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: Rodrigo Alencar <455.rodrigo.alencar@...il.com>
Cc: rodrigo.alencar@...log.com, linux-kernel@...r.kernel.org,
	linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org, Jonathan Cameron <jic23@...nel.org>,
	David Lechner <dlechner@...libre.com>,
	Andy Shevchenko <andy@...nel.org>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Michael Hennerich <Michael.Hennerich@...log.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jonathan Corbet <corbet@....net>
Subject: Re: [PATCH v5 2/8] iio: core: add fixed point parsing with 64-bit
 parts

On Mon, Jan 26, 2026 at 02:56:34PM +0000, Rodrigo Alencar wrote:
> On 26/01/26 01:49PM, Andy Shevchenko wrote:
> > On Fri, Jan 23, 2026 at 03:53:07PM +0000, Rodrigo Alencar via B4 Relay wrote:

...

> > > + * @integer: The integer part of the number
> > > + * @fract: The fractional part of the number
> > 
> > Can we use struct s64_fract? (Yes, you would need to add a couple of lines into
> > math.h for that, but don't worry, I will Ack such a change immediately.)
> 
> Sorry, I missed this. s64_fract would be declared as:
> 
> struct s64_fract {
> 	__s64 numerator;
> 	__s64 denominator;
> };
> 
> and numerator and denominator is not really applicable here. This type seems to be
> used to declare fractions.

Ah, good point. My memory (on fraction part) made a joke, I truly believed this
is the same what we need.

-- 
With Best Regards,
Andy Shevchenko