linux-kernel - Re: [PATCH v5 15/21] hwmon: (mr75203) modify the temperature equation according to series 5 datasheet

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Message-ID: <20220919131129.GA3545737@roeck-us.net>
Date:   Mon, 19 Sep 2022 06:11:29 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Eliav Farber <farbere@...zon.com>
Cc:     jdelvare@...e.com, robh+dt@...nel.org, p.zabel@...gutronix.de,
        rtanwar@...linear.com, andriy.shevchenko@...el.com,
        linux-hwmon@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, hhhawa@...zon.com, jonnyc@...zon.com,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v5 15/21] hwmon: (mr75203) modify the temperature
 equation according to series 5 datasheet

On Thu, Sep 08, 2022 at 03:24:43PM +0000, Eliav Farber wrote:
> Modify the equation and coefficients used to convert the digital output
> to temperature according to series 5 of the Moortec Embedded Temperature
> Sensor (METS) datasheet:
> T = G + H * (n / cal5 - 0.5) + J * F
> 
> Where:
> *) G = 60, H = 200, cal5 = 4094, J = -0.1.
> *) F = frequency clock in MHz.
> *) n is the digital output.
> 
> In code, the G, H and J coefficients are multiplied by a factor of 1000
> to get the temperature in milli-Celsius.
> Final result is clamped in case it exceeds min/max thresholds.
> 
> Change is done since it is unclear where the current equation and
> coefficients came from.
> 
> Signed-off-by: Eliav Farber <farbere@...zon.com>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

Applied to hwmon-next.

Thanks,
Guenter