linux-kernel - Re: [PATCH 2/5] hwmon: ina2xx: make shunt resistance configurable at run-time

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Message-ID: <CAMpxmJXA_jKgxb64EMK3KjxSDbTdi2x4rN0FTcVieOLMLCvZSg@mail.gmail.com>
Date:	Tue, 25 Nov 2014 17:09:16 +0100
From:	Bartosz Gołaszewski <bgolaszewski@...libre.com>
To:	Guenter Roeck <linux@...ck-us.net>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Benoit Cousson <bcousson@...libre.com>,
	Patrick Titiano <ptitiano@...libre.com>
Subject: Re: [PATCH 2/5] hwmon: ina2xx: make shunt resistance configurable at run-time

2014-11-25 16:59 GMT+01:00 Guenter Roeck <linux@...ck-us.net>:
> For a given system it should always be known, and it appears unlikely
> that there is a system out there where the shunt resistor value can change.
>
> What system exactly are you talking about ?

We're talking about the ACME cape for BeagleBone Black:
http://baylibre.com/acme/

The probes you can see on the page can be connected in various
configurations and different probes have different shunt resistors.
Their values are set from the user-space after booting, hence the
patch.

Bart
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