diff options
| author | Quentin Schulz <quentin.schulz@free-electrons.com> | 2016-09-08 16:28:35 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-09-08 21:34:17 -0700 |
| commit | 9417fefe6f6ec2005ff302fba33038f58ed766e3 (patch) | |
| tree | 6eb49f5aed13da444293fe055923d7daaa1ad6c0 /drivers/hwmon | |
| parent | f9f8b33d373056788a60c464dd8eb5b91ba518f8 (diff) | |
hwmon: (iio_hwmon) defer probe when no channel is found
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.
It is better to defer the probe of iio_hwmon if such error is returned by
iio_channel_get_all in order to let a chance to iio drivers to expose
channels in iio_map_list.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/iio_hwmon.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c index 89449871bca7..f6a76679c650 100644 --- a/drivers/hwmon/iio_hwmon.c +++ b/drivers/hwmon/iio_hwmon.c @@ -73,8 +73,11 @@ static int iio_hwmon_probe(struct platform_device *pdev) name = dev->of_node->name; channels = iio_channel_get_all(dev); - if (IS_ERR(channels)) + if (IS_ERR(channels)) { + if (PTR_ERR(channels) == -ENODEV) + return -EPROBE_DEFER; return PTR_ERR(channels); + } st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL); if (st == NULL) { |