diff options
| -rw-r--r-- | drivers/usb/dwc3/dwc3-generic.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c index 78966718d01..42e92478f25 100644 --- a/drivers/usb/dwc3/dwc3-generic.c +++ b/drivers/usb/dwc3/dwc3-generic.c @@ -68,10 +68,27 @@ static int dwc3_generic_probe(struct udevice *dev, #if CONFIG_IS_ENABLED(OF_CONTROL) dwc3_of_parse(dwc3); + /* + * There are currently four disparate placement possibilities of DWC3 + * reference clock phandle in SoC DTs: + * - in top level glue node, with generic subnode without clock (ZynqMP) + * - in top level generic node, with no subnode (i.MX8MQ) + * - in generic subnode, with other clock in top level node (i.MX8MP) + * - in both top level node and generic subnode (Rockchip) + * Cover all the possibilities here by looking into both nodes, start + * with the top level node as that seems to be used in majority of DTs + * to reference the clock. + */ node = dev_ofnode(dev->parent); index = ofnode_stringlist_search(node, "clock-names", "ref"); if (index < 0) index = ofnode_stringlist_search(node, "clock-names", "ref_clk"); + if (index < 0) { + node = dev_ofnode(dev); + index = ofnode_stringlist_search(node, "clock-names", "ref"); + if (index < 0) + index = ofnode_stringlist_search(node, "clock-names", "ref_clk"); + } if (index >= 0) dwc3->ref_clk = &glue->clks.clks[index]; #endif |