iio: cdc: ad7150: relax return value check for IRQ get

fwnode_irq_get[_byname]() were changed to not return 0 anymore. The
special error case where device-tree based IRQ mapping fails can't no
longer be reliably detected from this return value. This yields a
functional change in the driver where the mapping failure is treated as
an error.

The mapping failure can occur for example when the device-tree IRQ
information translation call-back(s) (xlate) fail, IRQ domain is not
found, IRQ type conflicts, etc. In most cases this indicates an error in
the device-tree and special handling is not really required.

One more thing to note is that ACPI APIs do not return zero for any
failures so this special handling did only apply on device-tree based
systems.

Drop the special handling for DT mapping failures as these can no longer
be separated from other errors at driver side. Change all failures in
IRQ getting to be handled by continuing without the events instead of
aborting the probe upon certain errors.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Link: https://lore.kernel.org/r/3ad1c6f195ead3dfa8711235e1dead139d27f700.1690890774.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/cdc/ad7150.c b/drivers/iio/cdc/ad7150.c
index d656d2f1275540aae44b5da9c0004b5fa5e9a780..4c03b9e834b88d6eafabb63999a1ed2c1720118f 100644 (file)
--- a/drivers/iio/cdc/ad7150.c
+++ b/drivers/iio/cdc/ad7150.c
@@ -541,6 +541,7 @@ static int ad7150_probe(struct i2c_client *client)
        const struct i2c_device_id *id = i2c_client_get_device_id(client);
        struct ad7150_chip_info *chip;
        struct iio_dev *indio_dev;
+       bool use_irq = true;
        int ret;
 
        indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*chip));
@@ -561,14 +562,13 @@ static int ad7150_probe(struct i2c_client *client)
 
        chip->interrupts[0] = fwnode_irq_get(dev_fwnode(&client->dev), 0);
        if (chip->interrupts[0] < 0)
-               return chip->interrupts[0];
-       if (id->driver_data == AD7150) {
+               use_irq = false;
+       else if (id->driver_data == AD7150) {
                chip->interrupts[1] = fwnode_irq_get(dev_fwnode(&client->dev), 1);
                if (chip->interrupts[1] < 0)
-                       return chip->interrupts[1];
+                       use_irq = false;
        }
-       if (chip->interrupts[0] &&
-           (id->driver_data == AD7151 || chip->interrupts[1])) {
+       if (use_irq) {
                irq_set_status_flags(chip->interrupts[0], IRQ_NOAUTOEN);
                ret = devm_request_threaded_irq(&client->dev,
                                                chip->interrupts[0],