[PATCH v4 6/6] arm64: dts: ti: k3-j7200-common-proc-board: Add USB support

Roger Quadros
2020-09-21T14:40:14Z

The board uses lane 3 of SERDES for USB. Set the mux
accordingly.

The USB controller and EVM supports super-speed for USB0
on the Type-C port. However, the SERDES has a limitation
that upto 2 protocols can be used at a time. The SERDES is
wired for PCIe, QSGMII and USB super-speed. It has been
chosen to use PCI2 and QSGMII as default. So restrict
USB0 to high-speed mode.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
.../dts/ti/k3-j7200-common-proc-board.dts | 22 +++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
index 6ab9d5d33a72..5c945f4ffec1 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j7200-common-proc-board.dts
@@ -42,6 +42,12 @@
J721E_IOPAD(0xe4, PIN_INPUT, 8) /* (V1) TIMER_IO0.MMC1_SDCD */
>;
};
+
+ main_usbss0_pins_default: main-usbss0-pins-default {
+ pinctrl-single,pins = <
+ J721E_IOPAD(0x120, PIN_OUTPUT, 0) /* (T4) USB0_DRVVBUS */
+ >;
+ };
};

&wkup_uart0 {
@@ -145,3 +151,19 @@
idle-states = <J7200_SERDES0_LANE0_PCIE1_LANE0>, <J7200_SERDES0_LANE1_PCIE1_LANE1>,
<J7200_SERDES0_LANE2_QSGMII_LANE1>, <J7200_SERDES0_LANE3_IP4_UNUSED>;
};
+
+&usb_serdes_mux {
+ idle-states = <1>; /* USB0 to SERDES lane 3 */
+};
+
+&usbss0 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&main_usbss0_pins_default>;
+ ti,vbus-divider;
+ ti,usb2-only;
+};
+
+&usb0 {
+ dr_mode = "otg";
+ maximum-speed = "high-speed";
+};