linux-kernel - Re: Adding custom functional callbacks to IIO driver

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Message-ID: <b8cc5128-da41-2620-c44b-c7af28cf6980@metafoo.de>
Date:   Fri, 12 Feb 2021 12:35:35 +0100
From:   Lars-Peter Clausen <lars@...afoo.de>
To:     Anand Ashok Dumbre <ANANDASH@...inx.com>,
        Jonathan Cameron <jic23@...nel.org>,
        "knaack.h@....de" <knaack.h@....de>,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Michal Simek <michals@...inx.com>,
        "linux-iio@...r.kernel.org" <linux-iio@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Adding custom functional callbacks to IIO driver

On 2/12/21 12:07 PM, Anand Ashok Dumbre wrote:
> Hello,
>
> I have an IIO adc driver that measures temperatures and voltages on the SOC.
> There are other kernel modules interested in the temperature and voltage event information.
>
> Would using a custom callback registration mechanism be advisable?
> Is there something similar done already in IIO that can be leveraged?

Hi,

Have a look at the IIO consumer API that allows other kernel modules to 
subscribe to the output of an IIO device. 
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/iio/consumer.h 


- Lars