media: ov2680: Allow probing if link-frequencies is absent

Since commit 63b0cd30b78e ("media: ov2680: Add bus-cfg / endpoint
property verification") the ov2680 no longer probes on a imx7s-warp7:

ov2680 1-0036: error -EINVAL: supported link freq 330000000 not found
ov2680 1-0036: probe with driver ov2680 failed with error -22

As the 'link-frequencies' property is not mandatory, allow the probe
to succeed by skipping the link-frequency verification when the
property is absent.

Cc: stable@vger.kernel.org
Fixes: 63b0cd30b78e ("media: ov2680: Add bus-cfg / endpoint property verification")
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

diff --git a/drivers/media/i2c/ov2680.c b/drivers/media/i2c/ov2680.c
index 3e3b7c2b492cf54f53fb4e66756e02e9ada0260d..a857763c7984c5c66718a8f691697adc720514c1 100644 (file)
--- a/drivers/media/i2c/ov2680.c
+++ b/drivers/media/i2c/ov2680.c
@@ -1123,18 +1123,23 @@ static int ov2680_parse_dt(struct ov2680_dev *sensor)
                goto out_free_bus_cfg;
        }
 
+       if (!bus_cfg.nr_of_link_frequencies) {
+               dev_warn(dev, "Consider passing 'link-frequencies' in DT\n");
+               goto skip_link_freq_validation;
+       }
+
        for (i = 0; i < bus_cfg.nr_of_link_frequencies; i++)
                if (bus_cfg.link_frequencies[i] == sensor->link_freq[0])
                        break;
 
-       if (bus_cfg.nr_of_link_frequencies == 0 ||
-           bus_cfg.nr_of_link_frequencies == i) {
+       if (bus_cfg.nr_of_link_frequencies == i) {
                ret = dev_err_probe(dev, -EINVAL,
                                    "supported link freq %lld not found\n",
                                    sensor->link_freq[0]);
                goto out_free_bus_cfg;
        }
 
+skip_link_freq_validation:
        ret = 0;
 out_free_bus_cfg:
        v4l2_fwnode_endpoint_free(&bus_cfg);