Since related drivers doesn't support OTG framework yet, the renesas_usbhs
driver cannot detect VBUS in particular situations. And then a gadget
driver doesn't work correctly (even if a USB cable is connected to a USB
host, nothing happens).
However, we can avoid such a situation if we operate the followings:
1) rmmod/unbind all gadget drivers
2) rmmod/unbind the renesas_usbhs driver
e.g. # echo e6590000.usb > /sys/bus/platform/drivers/renesas_usbhs/unbind
3) connect the USB cable of CN9 to a USB host
4) insmod/bind the renesas_usbhs driver
e.g. # echo e6590000.usb > /sys/bus/platform/drivers/renesas_usbhs/bind
5) insmod/bind a gadget driver
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
index 3367f9c..b2852e7 100644
--- a/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
+++ b/arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts
@@ -603,6 +603,10 @@
status = "okay";
};
+&hsusb {
+ status = "okay";
+};
+
&pcie_bus_clk {
clock-frequency = <100000000>;
status = "okay";
--
1.9.1
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