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Date:   Thu, 8 Sep 2022 21:11:24 +0300
From:   Andy Shevchenko <andriy.shevchenko@intel.com>
To:     Eliav Farber <farbere@amazon.com>
Cc:     jdelvare@suse.com, linux@roeck-us.net, robh+dt@kernel.org,
        p.zabel@pengutronix.de, rtanwar@maxlinear.com,
        linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, hhhawa@amazon.com, jonnyc@amazon.com
Subject: Re: [PATCH v5 20/21] hwmon: (mr75203) add debugfs to read and write
 temperature coefficients
Message-ID: <YxowTBIODMLjf1Ek@smile.fi.intel.com>
References: <20220908152449.35457-1-farbere@amazon.com>
 <20220908152449.35457-21-farbere@amazon.com>
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On Thu, Sep 08, 2022 at 03:24:48PM +0000, Eliav Farber wrote:
> This change adds debugfs to read and write temperature sensor coefficients
> - g, h, j and cal5.
> 
> The coefficients can vary between product and product, so it can be very
> useful to be able to modify them on the fly during the calibration
> process.
> 
> e.g.:
> 
> cat /sys/kernel/debug/940f23d0000.pvt/ts_coeff_cal5
> 4096
> 
> echo 83000 > sys/kernel/debug/940f23d0000.pvt/ts_coeff_g

...

> - Return j coefficient to use debugfs_create_file() instead of
>   debugfs_create_u32() because j is signed.

You can use

DEFINE_DEBUGFS_ATTRIBUTE(ts_coeff_j, ts_coeff_j_get, ts_coeff_j_set, "%lld\n");

which still makes code compact.

-- 
With Best Regards,
Andy Shevchenko