[PATCH v6 4/6] rockchip: rk3588-rock-5b: Add USB-C controller to u-boot.dtsi

[Sebastian Reichel]

Add USB-C controller (fusb302), which will be used by U-Boot to
initialize USB-PD. This is needed, because USB-PD communication
must happen within 5 seconds after the USB-C connector got plugged.
On my Rock 5B it often takes 5 seconds to jump to the Linux binary,
so it must happen before Linux is initialized.

This adds the DT node to the U-Boot specific file, since the Linux
kernel DT currently does not describe it to avoid a system reset.
The plan is to add it to the Linux DT with status = 'fail' and then
let U-Boot mark it as status = 'okay' if it properly dealt with
early USB-PD initialization. Until the Kernel DT has the node, let's
add it in U-Boot to get things going.

Reviewed-by: Kever Yang <kever.yang at rock-chips.com>
Tested-by: Soeren Moch <smoch at web.de>
Signed-off-by: Sebastian Reichel <sebastian.reichel at collabora.com>
---
 arch/arm/dts/rk3588-rock-5b-u-boot.dtsi | 28 +++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi b/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
index 4dd17ff408cb..b0ad1158854c 100644
--- a/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
+++ b/arch/arm/dts/rk3588-rock-5b-u-boot.dtsi
@@ -3,6 +3,7 @@
  * Copyright (c) 2023 Collabora Ltd.
  */
 
+#include <dt-bindings/usb/pd.h>
 #include "rk3588-u-boot.dtsi"
 
 &fspim2_pins {
@@ -10,6 +11,33 @@
 	bootph-some-ram;
 };
 
+&i2c4 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c4m1_xfer>;
+	status = "okay";
+
+	usbc0: usb-typec at 22 {
+		compatible = "fcs,fusb302";
+		reg = <0x22>;
+		interrupt-parent = <&gpio3>;
+		interrupts = <RK_PB4 IRQ_TYPE_LEVEL_LOW>;
+		pinctrl-names = "default";
+		status = "okay";
+
+		usb_con: connector {
+			compatible = "usb-c-connector";
+			label = "USB-C";
+			data-role = "dual";
+			power-role = "sink";
+			try-power-role = "sink";
+			op-sink-microwatt = <1000000>;
+			sink-pdos =
+				<PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)>,
+				<PDO_VAR(5000, 20000, 5000)>;
+		};
+	};
+};
+
 &sdhci {
 	cap-mmc-highspeed;
 	mmc-hs200-1_8v;
-- 
2.45.2