linux-kernel - Re: [PATCH v4 2/6] iio: pressure: bmp280: Refactorize reading functions

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240413175612.5b117573@jic23-huawei>
Date: Sat, 13 Apr 2024 17:56:12 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Vasileios Amoiridis <vassilisamir@...il.com>
Cc: lars@...afoo.de, andriy.shevchenko@...ux.intel.com,
 ang.iglesiasg@...il.com, mazziesaccount@...il.com, ak@...klinger.de,
 petre.rodan@...dimension.ro, phil@...pberrypi.com, 579lpy@...il.com,
 u.kleine-koenig@...gutronix.de, biju.das.jz@...renesas.com,
 linus.walleij@...aro.org, semen.protsenko@...aro.org,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, Jonathan Cameron
 <Jonathan.Cameron@...wei.com>
Subject: Re: [PATCH v4 2/6] iio: pressure: bmp280: Refactorize reading
 functions

On Sun,  7 Apr 2024 19:29:16 +0200
Vasileios Amoiridis <vassilisamir@...il.com> wrote:

> For BMP18x, BMP28x, BME280, BMP38x the reading of the pressure
> value requires an update of the t_fine variable which happens
> through reading the temperature value.
> 
> So all the bmpxxx_read_press() functions of the above sensors
> are internally calling the equivalent bmpxxx_read_temp() function
> in order to update the t_fine value. By just looking at the code
> this functionality is a bit hidden and is not easy to understand
> why those channels are not independent.
> 
> This commit tries to clear these things a bit by splitting the
> bmpxxx_{read/compensate}_{temp/press/humid}() to the following:
> 
> i. bmpxxx_read_{temp/press/humid}_adc(): read the raw value from
> the sensor.
> 
> ii. bmpxx_calc_t_fine(): calculate the t_fine variable.
> 
> iii. bmpxxx_get_t_fine(): get the t_fine variable.
> 
> iv. bmpxxx_compensate_{temp/press/humid}(): compensate the adc
> values and return the calculated value.
> 
> v. bmpxxx_read_{temp/press/humid}(): combine calls of the
> aforementioned functions to return the requested value.
> 
> Suggested-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> Signed-off-by: Vasileios Amoiridis <vassilisamir@...il.com>
Looks good to me. Thanks for tidying this up.