On Wed 04 Jan 03:54 PST 2017, Lee Jones wrote:

On Mon, 26 Dec 2016, Bjorn Andersson wrote:

quoted

From: Bjorn Andersson <redacted>

Implement support for initialization of the lm3533 driver core and
probing child devices from Device Tree.

[..]

quoted

@@ -512,6 +514,11 @@ static int lm3533_device_init(struct lm3533 *lm3533)
 	lm3533_device_bl_init(lm3533);
 	lm3533_device_led_init(lm3533);
 
+	if (lm3533->dev->of_node) {
+		of_platform_populate(lm3533->dev->of_node, NULL, NULL,
+				     lm3533->dev);
+	}

I think it's save to call of_platform_populate(), even if !of_node.
It will just fail and return an error code, which you are ignoring
anyway.

I thought so too, but that's apparently how you trigger probing children
of the root node. So we're stuck with a conditional.

[..]

quoted

 static int lm3533_i2c_probe(struct i2c_client *i2c,
 					const struct i2c_device_id *id)
 {

[..]

quoted

 
+	if (i2c->dev.of_node) {

I'd prefer this check to be placed in lm3533_pdata_from_of_node().

Just return silently if !dev->of_node.

I agree, will update this.

quoted

+		ret = lm3533_pdata_from_of_node(lm3533->dev);
+		if (ret < 0)
+			return ret;
+	}
+
 	return lm3533_device_init(lm3533);
 }
 

Regards,
Bjorn