Since the PHY of USB3.0 and EHCI/OHCI ch2 are the same, the USB3.0
driver cannot use the phy driver when the EHCI/OHCI ch2 already used it:
phy phy-e6590100.usb-phy.3: phy init failed --> -16
xhci-hcd: probe of ee000000.usb failed with error -16
If so, we have to unbind the EHCI/OHCI ch2, and then we have to bind
the USB3.0 driver as the following:
echo 0000:02:02.0 > /sys/bus/pci/drivers/ehci-pci/unbind
echo 0000:02:01.0 > /sys/bus/pci/drivers/ohci-pci/unbind
echo ee000000.usb > /sys/bus/platform/drivers/xhci-hcd/bind
Note that there will be pinctrl-related error messages if both
internal PCI and USB3.0 are enabled but they should be just ignored:
sh-pfc e6060000.pfc: pin GP_5_22 already requested by ee0d0000.pci; cannot claim for ee000000.usb
sh-pfc e6060000.pfc: pin-182 (ee000000.usb) status -22
ata1: SATA link down (SStatus 0 SControl 300)
sh-pfc e6060000.pfc: could not request pin 182 (GP_5_22) from group usb2 on device sh-pfc
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
---
arch/arm/boot/dts/r8a7790-lager.dts | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/arm/boot/dts/r8a7790-lager.dts b/arch/arm/boot/dts/r8a7790-lager.dts
index 719979e..3f51be1 100644
--- a/arch/arm/boot/dts/r8a7790-lager.dts
+++ b/arch/arm/boot/dts/r8a7790-lager.dts
@@ -419,6 +419,12 @@
pinctrl-names = "default";
};
+&xhci {
+ status = "okay";
+ pinctrl-0 = <&usb2_pins>;
+ pinctrl-names = "default";
+};
+
&pci2 {
status = "okay";
pinctrl-0 = <&usb2_pins>;
--
1.7.9.5
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