[v3,6/6] arm64: dts: ti: k3-j7200-common-proc-board: Add USB support

Commit Message

Roger Quadros Sept. 15, 2020, 11:20 a.m. UTC

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 <[e-mail]>
---
 .../dts/ti/k3-j7200-common-proc-board.dts     | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

Patch

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 0ecaba600704..5ce3fddbd617 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 = <SERDES0_LANE0_PCIE1_LANE0>, <SERDES0_LANE1_PCIE1_LANE1>,
 		      <SERDES0_LANE2_QSGMII_LANE1>, <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";
+};