On Fri, Aug 20, 2021 at 03:20:55PM +0300, Andy Shevchenko wrote:

On Thu, Aug 19, 2021 at 11:19:34PM +0300, Sakari Ailus wrote:

quoted

Return -EPROBE_DEFER if probing the device fails because of the I²C
transaction (-EIO only). This generally happens when the power on sequence
of the device has not been fully performed yet due to later probing of
other drivers.

...

quoted

+	if (ret == -EIO && is_acpi_device_node(dev_fwnode(&client->dev))) {

has_acpi_companion() is better to have here, no?

Agreed.

-- 
Sakari Ailus