From: Peter Rosin <peda@axentia.se>
To: Fabio Estevam <festevam@gmail.com>
Cc: linux-iio@vger.kernel.org
Subject: Re: Reading ADC that comes from a multiplexer
Date: Wed, 22 Sep 2021 14:53:35 +0200 [thread overview]
Message-ID: <73d0ede5-8a35-7e3e-e685-235f39ea28e7@axentia.se> (raw)
In-Reply-To: <CAOMZO5A0a20_+JHmCMYXLuZYCE04GDTqt0x_GXtVxA5Q4MSAog@mail.gmail.com>
On 2021-09-22 14:44, Fabio Estevam wrote:
> Just realized that iio-mux.c does not get probed.
>
> In mux_probe():
>
> parent = devm_iio_channel_get(dev, "parent");
>
> is always returning -EPROBE_DEFER, even though I passed:
>
> io-channel-names = "parent";
>
I think that's because the "parent" channel (i.e. <&adc 4> in your case)
is referring to a node that is not providing any iio channels at all.
Just because you added "#io-channel-cells = <1>;" to that node, does not
make it so. The driver has to support it as well.
Cheers,
Peter
next prev parent reply other threads:[~2021-09-22 12:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-22 2:18 Reading ADC that comes from a multiplexer Fabio Estevam
2021-09-22 7:27 ` Peter Rosin
2021-09-22 11:37 ` Fabio Estevam
2021-09-22 12:44 ` Fabio Estevam
2021-09-22 12:53 ` Peter Rosin [this message]
2021-09-22 13:41 ` Fabio Estevam
2021-09-22 14:20 ` Fabio Estevam
2021-09-22 14:28 ` Peter Rosin
2021-09-22 14:50 ` Fabio Estevam
2021-09-23 10:28 ` Jonathan Cameron
2021-09-24 14:41 ` Fabio Estevam
2021-09-25 14:32 ` Jonathan Cameron
2021-09-22 12:44 ` Peter Rosin
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