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From: Shawn Guo <>
To: Felipe Balbi <>
Cc: Bjorn Andersson <>,,,
	Shawn Guo <>
Subject: [PATCH] usb: dwc3: qcom: skip interconnect init for ACPI probe
Date: Thu, 11 Mar 2021 14:03:18 +0800
Message-ID: <> (raw)

The ACPI probe starts failing since commit bea46b981515 ("usb: dwc3:
qcom: Add interconnect support in dwc3 driver"), because there is no
interconnect support for ACPI, and of_icc_get() call in
dwc3_qcom_interconnect_init() will just return -EINVAL.

Fix the problem by skipping interconnect init for ACPI probe, and then
the NULL icc_path_ddr will simply just scheild all ICC calls.

Fixes: bea46b981515 ("usb: dwc3: qcom: Add interconnect support in dwc3 driver")
Signed-off-by: Shawn Guo <>
 drivers/usb/dwc3/dwc3-qcom.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 175a609cd0af..7dc74885a635 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -244,6 +244,9 @@ static int dwc3_qcom_interconnect_init(struct dwc3_qcom *qcom)
 	struct device *dev = qcom->dev;
 	int ret;
+	if (has_acpi_companion(dev))
+		return 0;
 	qcom->icc_path_ddr = of_icc_get(dev, "usb-ddr");
 	if (IS_ERR(qcom->icc_path_ddr)) {
 		dev_err(dev, "failed to get usb-ddr path: %ld\n",

             reply index

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-11  6:03 Shawn Guo [this message]
2021-03-11  8:32 ` Sergei Shtylyov
2021-03-11  8:48   ` Shawn Guo

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