[PATCH V1 4/8] usb: dwc3: drd: Register the eud connector child node for dwc3
From: Souradeep Chowdhury <hidden>
Date: 2021-11-23 04:30:47
Also in:
linux-arm-msm, linux-devicetree, lkml
Subsystem:
designware usb3 drd ip driver, the rest, usb subsystem · Maintainers:
Thinh Nguyen, Linus Torvalds, Greg Kroah-Hartman
Register the child node for dwc3 which is the "eud_usb_connector". The eud driver will be able to switch the usb role from device to host and vice versa using the role switch property of dwc3 node. Signed-off-by: Souradeep Chowdhury <redacted> --- drivers/usb/dwc3/drd.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index d7f7683..b4ea55c 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c@@ -8,6 +8,7 @@ */ #include <linux/extcon.h> +#include <linux/of_platform.h> #include <linux/of_graph.h> #include <linux/platform_device.h> #include <linux/property.h>
@@ -164,6 +165,27 @@ static int dwc3_otg_get_irq(struct dwc3 *dwc) return irq; } +static int dwc3_register_eud(struct dwc3 *dwc) +{ + struct device *dev = dwc->dev; + struct device_node *np = dev->of_node; + int ret; + + of_get_child_by_name(np, "eud_usb_connector"); + if (!np) { + dev_dbg(dev, "no usb_connector child node specified\n"); + return 0; + } + + ret = of_platform_populate(np, NULL, NULL, dev); + if (ret) { + dev_err(dev, "failed to register usb_connector - %d\n", ret); + return ret; + } + + return 0; +} + void dwc3_otg_init(struct dwc3 *dwc) { u32 reg;
@@ -580,6 +602,10 @@ int dwc3_drd_init(struct dwc3 *dwc) ret = dwc3_setup_role_switch(dwc); if (ret < 0) return ret; + + ret = dwc3_register_eud(dwc); + if (ret < 0) + return ret; } else if (dwc->edev) { dwc->edev_nb.notifier_call = dwc3_drd_notifier; ret = extcon_register_notifier(dwc->edev, EXTCON_USB_HOST,
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