linux-kernel - Re: [PATCH] iio: adc: Add support for TI ADC1x8s102

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Date:   Wed, 26 Apr 2017 12:01:58 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Jan Kiszka <jan.kiszka@...mens.com>
Cc:     Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Jonathan Cameron <jic23@...nel.org>, linux-iio@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Sascha Weisenberger <sascha.weisenberger@...mens.com>
Subject: Re: [PATCH] iio: adc: Add support for TI ADC1x8s102

On Tue, Apr 25, 2017 at 06:12:12PM +0200, Jan Kiszka wrote:
> Now, do you also a suggestion where to put that 5 V reference voltage
> value that is hard-coded (via wiring) on the target boards for the ADC?
> That is now device-specific, not a controller parameter. Is there an
> ACPI-way to express such a parameter?

You may put it into device property using _DSD (as long as you don't try
to represent regulators or so).

> How would that be done for DTs?

I don't know but you may look under Documentation/devicetree/bindings if
there is anything.

> Plan B would be hard-coding in the code for now, waiting for a second,
> non-ACPI user to address it.

Sounds reasonable.