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Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall

From Quentin Schulz <quentin.schulz@free-electrons.com>
Newsgroups linux.kernel
Subject Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall
Date 2016-07-26 10:30 +0200
Message-ID <rZ5Ut-853-15@gated-at.bofh.it> (permalink)
References <rZ5hL-7Cz-17@gated-at.bofh.it> <rZ5hL-7Cz-19@gated-at.bofh.it> <rZ5Ut-853-5@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On 26/07/2016 10:21, Alexander Stein wrote:
> On Tuesday 26 July 2016 09:43:44, Quentin Schulz wrote:
>> iio_channel_get_all returns -ENODEV when it cannot find either phandles and
>> properties in the Device Tree or channels whose consumer_dev_name matches
>> iio_hwmon in iio_map_list. The iio_map_list is filled in by iio drivers
>> which might be probed after iio_hwmon.
> 
> Would it work if iio_channel_get_all returning ENODEV is used for returning 
> EPROBE_DEFER in iio_channel_get_all? Using late initcalls for driver/device 
> dependencies seems not right for me at this place.

Then what if the iio_channel_get_all is called outside of the probe of a
driver? We'll have to change the error code, things we are apparently
trying to avoid (see v2 patches' discussions).

Thanks,
Quentin

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[PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Quentin Schulz <quentin.schulz@free-electrons.com> - 2016-07-26 09:50 +0200
  Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Alexander Stein <alexander.stein@systec-electronic.com> - 2016-07-26 10:30 +0200
    Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Quentin Schulz <quentin.schulz@free-electrons.com> - 2016-07-26 10:30 +0200
      Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Alexander Stein <alexander.stein@systec-electronic.com> - 2016-07-26 11:10 +0200
        Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Quentin Schulz <quentin.schulz@free-electrons.com> - 2016-07-26 11:40 +0200
          Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Alexander Stein <alexander.stein@systec-electronic.com> - 2016-07-26 12:10 +0200
            Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Quentin Schulz <quentin.schulz@free-electrons.com> - 2016-07-26 12:10 +0200
            Re: [PATCH v3 1/4] hwmon: iio_hwmon: delay probing with late_initcall Guenter Roeck <linux@roeck-us.net> - 2016-07-26 18:10 +0200

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