linux-kernel - [PATCH 03/10] phy: qcom-qmp-ufs: clean up device-tree parsing

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Date:   Mon, 24 Oct 2022 11:00:34 +0200
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH 03/10] phy: qcom-qmp-ufs: clean up device-tree parsing

Since the QMP driver split there will be at most a single child node so
drop the obsolete iteration construct.

While at it, drop the verbose error logging that would have been
printed also on probe deferrals.

Note that there's no need to check if there are additional child nodes
(the kernel is not a devicetree validator), but let's return an error if
there are no child nodes at all for now.

Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-ufs.c | 21 ++++++---------------
 1 file changed, 6 insertions(+), 15 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
index b4c3b3d97f52..25744b3576f3 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-ufs.c
@@ -1048,7 +1048,6 @@ static int qmp_ufs_probe(struct platform_device *pdev)
 	void __iomem *serdes;
 	const struct qmp_phy_cfg *cfg = NULL;
 	struct qmp_ufs *qmp;
-	int num, id;
 	int ret;
 
 	qmp = devm_kzalloc(dev, sizeof(*qmp), GFP_KERNEL);
@@ -1074,23 +1073,15 @@ static int qmp_ufs_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	num = of_get_available_child_count(dev->of_node);
-	/* do we have a rogue child node ? */
-	if (num > 1)
+	child = of_get_next_available_child(dev->of_node, NULL);
+	if (!child)
 		return -EINVAL;
 
-	id = 0;
-	for_each_available_child_of_node(dev->of_node, child) {
-		/* Create per-lane phy */
-		ret = qmp_ufs_create(dev, child, serdes, cfg);
-		if (ret) {
-			dev_err(dev, "failed to create lane%d phy, %d\n",
-				id, ret);
-			goto err_node_put;
-		}
+	ret = qmp_ufs_create(dev, child, serdes, cfg);
+	if (ret)
+		goto err_node_put;
 
-		id++;
-	}
+	of_node_put(child);
 
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 
-- 
2.37.3