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Message-ID: <e1277a004b5aef8e6b407089ac1e3df6ff6fee50.camel@gmail.com>
Subject: Re: [PATCH RFC 0/4] iio: add support for multiple scan types
From: Nuno =?ISO-8859-1?Q?S=E1?= <noname.nuno@gmail.com>
To: David Lechner <dlechner@baylibre.com>, Jonathan Cameron
 <jic23@kernel.org>
Cc: Michael Hennerich <Michael.Hennerich@analog.com>, Nuno
 =?ISO-8859-1?Q?S=E1?= <nuno.sa@analog.com>, Julien Stephan
 <jstephan@baylibre.com>, Esteban Blanc <eblanc@baylibre.com>,
 linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org
Date: Tue, 21 May 2024 11:18:24 +0200
In-Reply-To: <20240507-iio-add-support-for-multiple-scan-types-v1-0-95ac33ee51e9@baylibre.com>
References: 
	<20240507-iio-add-support-for-multiple-scan-types-v1-0-95ac33ee51e9@baylibre.com>
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On Tue, 2024-05-07 at 14:02 -0500, David Lechner wrote:
> Following up from this thread [1]...
>=20
> Unless I've overlooked something important, I think adding support for
> multiple scan types per channels should be rather trivial, at least in
> the kernel. Userspace tools will need to learn to re-read buffer _type
> attributes though. For example, it looks like libiio caches these values.
> I had to restart iiod to get a proper capture with the iio-oscilloscope
> after changing the scan type at runtime.

No for now but to add more future fun, we may consider in having something
similar as hwmon [1]. Hence, userspace could do things like poll(2) on the
specific file rather than having to read it over and over...

[1]: https://elixir.bootlin.com/linux/latest/source/drivers/hwmon/hwmon.c#L=
649
- Nuno S=C3=A1