linux-kernel - [PATCH v4 09/10] usb: dwc3: qcom: Detect DWC3 DT-nodes with "usb"-prefixed names

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Date:   Thu, 10 Dec 2020 12:17:54 +0300
From:   Serge Semin <Sergey.Semin@...kalelectronics.ru>
To:     Felipe Balbi <balbi@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>
Subject: [PATCH v4 09/10] usb: dwc3: qcom: Detect DWC3 DT-nodes with "usb"-prefixed names

In accordance with the USB HCD/DRD schema all the USB controllers are
supposed to have DT-nodes named with prefix "^usb(@.*)?".  Since the
existing DT-nodes will be renamed in a subsequent patch let's first make
sure the DWC3 Qualcomm driver supports them and second falls back to the
deprecated naming so not to fail on the legacy DTS-files passed to the
newer kernels.

Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
---
 drivers/usb/dwc3/dwc3-qcom.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index c703d552bbcf..49ad8d507d37 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -630,7 +630,8 @@ static int dwc3_qcom_of_register_core(struct platform_device *pdev)
 	struct device		*dev = &pdev->dev;
 	int			ret;
 
-	dwc3_np = of_get_child_by_name(np, "dwc3");
+	dwc3_np = of_get_child_by_name(np, "usb") ?:
+		  of_get_child_by_name(np, "dwc3");
 	if (!dwc3_np) {
 		dev_err(dev, "failed to find dwc3 core child\n");
 		return -ENODEV;
-- 
2.29.2