[PATCH v2 1/5] media: i2c: ov5675: Wait for endpoint

[Antti Laakso <antti.laakso@linux.intel.com>]

Defer probe if endpoint is not yet available. And do it before acquiring
clock, gpio and regulators.

Signed-off-by: Antti Laakso <antti.laakso@linux.intel.com>
---
 drivers/media/i2c/ov5675.c | 32 ++++++++++++++++----------------
 1 file changed, 16 insertions(+), 16 deletions(-)

diff --git a/drivers/media/i2c/ov5675.c b/drivers/media/i2c/ov5675.c
index ea26df328189..508149485248 100644
--- a/drivers/media/i2c/ov5675.c
+++ b/drivers/media/i2c/ov5675.c
@@ -1181,17 +1181,26 @@ static int ov5675_get_hwcfg(struct ov5675 *ov5675)
 	if (!fwnode)
 		return -ENXIO;
 
+	ep = fwnode_graph_get_endpoint_by_id(fwnode, 0, 0,
+					     FWNODE_GRAPH_ENDPOINT_NEXT);
+	ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
+	fwnode_handle_put(ep);
+	if (ret)
+		return ret;
+
 	ov5675->xvclk = devm_v4l2_sensor_clk_get(dev, NULL);
-	if (IS_ERR(ov5675->xvclk))
-		return dev_err_probe(dev, PTR_ERR(ov5675->xvclk),
-				     "failed to get xvclk: %pe\n",
-				     ov5675->xvclk);
+	if (IS_ERR(ov5675->xvclk)) {
+		ret = dev_err_probe(dev, PTR_ERR(ov5675->xvclk),
+				    "failed to get xvclk\n");
+		goto check_hwcfg_error;
+	}
 
 	xvclk_rate = clk_get_rate(ov5675->xvclk);
 	if (xvclk_rate != OV5675_XVCLK_19_2) {
 		dev_err(dev, "external clock rate %u is unsupported",
 			xvclk_rate);
-		return -EINVAL;
+		ret = -EINVAL;
+		goto check_hwcfg_error;
 	}
 
 	ov5675->reset_gpio = devm_gpiod_get_optional(dev, "reset",
@@ -1199,7 +1208,7 @@ static int ov5675_get_hwcfg(struct ov5675 *ov5675)
 	if (IS_ERR(ov5675->reset_gpio)) {
 		ret = PTR_ERR(ov5675->reset_gpio);
 		dev_err(dev, "failed to get reset-gpios: %d\n", ret);
-		return ret;
+		goto check_hwcfg_error;
 	}
 
 	for (i = 0; i < OV5675_NUM_SUPPLIES; i++)
@@ -1208,16 +1217,7 @@ static int ov5675_get_hwcfg(struct ov5675 *ov5675)
 	ret = devm_regulator_bulk_get(dev, OV5675_NUM_SUPPLIES,
 				      ov5675->supplies);
 	if (ret)
-		return ret;
-
-	ep = fwnode_graph_get_next_endpoint(fwnode, NULL);
-	if (!ep)
-		return -ENXIO;
-
-	ret = v4l2_fwnode_endpoint_alloc_parse(ep, &bus_cfg);
-	fwnode_handle_put(ep);
-	if (ret)
-		return ret;
+		goto check_hwcfg_error;
 
 	if (bus_cfg.bus.mipi_csi2.num_data_lanes != OV5675_DATA_LANES) {
 		dev_err(dev, "number of CSI2 data lanes %d is not supported",
-- 
2.53.0