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@xxxxxxxxxxxxxxxxxx>
---
v5:
- patch re-inserted,
v3:
- patch removed,
drivers/hwmon/iio_hwmon.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/hwmon/iio_hwmon.c b/drivers/hwmon/iio_hwmon.c
index b550ba5..c0da4d9 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) {
--
2.5.0
--
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