@@ -11,6 +11,7 @@
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <linux/property.h>
+#include <linux/of_platform.h>
#include "debug.h"
#include "core.h"
@@ -537,8 +538,29 @@ static int dwc3_setup_role_switch(struct dwc3 *dwc)
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_DEVICE);
return 0;
}
+
+static int dwc3_register_gpio_usb_connector(struct dwc3 *dwc)
+{
+ struct device *dev = dwc->dev;
+ struct device_node *np = dev->of_node, *conn_np;
+ int ret = 0;
+
+ conn_np = of_get_child_by_name(np, "connector");
+ if (!conn_np) {
+ dev_dbg(dev, "no connector child node specified\n");
+ goto done;
+ }
+
+ if (of_device_is_compatible(conn_np, "gpio-usb-b-connector"))
+ ret = of_platform_populate(np, NULL, NULL, dev);
+done:
+ of_node_put(conn_np);
+ return ret;
+}
+
#else
#define dwc3_setup_role_switch(x) 0
+#define dwc3_register_gpio_usb_connector(x) 0
#endif
int dwc3_drd_init(struct dwc3 *dwc)
@@ -554,6 +576,9 @@ int dwc3_drd_init(struct dwc3 *dwc)
ret = dwc3_setup_role_switch(dwc);
if (ret < 0)
return ret;
+ ret = dwc3_register_gpio_usb_connector(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,
This patch adds the ability to probe and enumerate a connector based on usb-conn-gpio. A device node label gpio_usb_connector is used to identify a usb-conn-gpio as a child of the USB interface. You would use usb-conn-gpio when a regulator in your system provides VBUS directly to the connector instead of supplying via the USB PHY. The parent device must have the "usb-role-switch" property, so that when the usb-conn-gpio driver calls usb_role_switch_set_role() the notification in dwc3 will run and the block registers will be updated to match the state detected at the connector. Cc: John Stultz <john.stultz@linaro.org> Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Cc: Lee Jones <lee.jones@linaro.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rob Herring <robh+dt@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> CC: ShuFan Lee <shufan_lee@richtek.com> Cc: Heikki Krogerus <heikki.krogerus@linux.intel.com> Cc: Suzuki K Poulose <suzuki.poulose@arm.com> Cc: Chunfeng Yun <chunfeng.yun@mediatek.com> Cc: Yu Chen <chenyu56@huawei.com> Cc: Felipe Balbi <balbi@kernel.org> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Andy Shevchenko <andy.shevchenko@gmail.com> Cc: Jun Li <lijun.kernel@gmail.com> Cc: Valentin Schneider <valentin.schneider@arm.com> Cc: Jack Pham <jackp@codeaurora.org> Cc: linux-usb@vger.kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org> --- drivers/usb/dwc3/drd.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+)