[PATCH] arm64: dts: rockchip: Enable TYPE-C PD for ROC-RK3399-PC

[Jagan Teki]

The power supply circuit in ROC-RK3399-PC is

Power Supply (or PPS) => FUSB => MP8859

VUBS pin of FUSB and IN pin of MP8859 is supplied via TYPEC_IN.

The MP8859 operated with 2.8V to 22V supply voltage and typical
applications this supply can be 12V.

This patch is trying to support the PD by changing the FUSB VBUS supply
to 12V and tune the I2C7 timings from downstream kernel.

Tested with PD3.0 PPS with supply voltages of 12V/3A and 20V/5A.

Cc: Corentin Labbe <clabbe at baylibre.com>
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 .../boot/dts/rockchip/rk3399-roc-pc.dtsi      | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
index c32913df93c3..8963b3858eae 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
@@ -6,6 +6,7 @@
 /dts-v1/;
 #include <dt-bindings/input/linux-event-codes.h>
 #include <dt-bindings/pwm/pwm.h>
+#include "dt-bindings/usb/pd.h"
 #include "rk3399.dtsi"
 #include "rk3399-opp.dtsi"
 
@@ -524,8 +525,9 @@ &i2c3 {
 };
 
 &i2c4 {
-	i2c-scl-rising-time-ns = <600>;
-	i2c-scl-falling-time-ns = <20>;
+	clock-frequency = <400000>;
+	i2c-scl-rising-time-ns = <345>;
+	i2c-scl-falling-time-ns = <11>;
 	status = "okay";
 
 	fusb1: usb-typec at 22 {
@@ -552,8 +554,19 @@ fusb0: usb-typec at 22 {
 		interrupts = <2 IRQ_TYPE_LEVEL_LOW>;
 		pinctrl-names = "default";
 		pinctrl-0 = <&fusb0_int>;
-		vbus-supply = <&vcc_vbus_typec0>;
+		vbus-supply = <&dc_12v>;
 		status = "okay";
+
+		connector {
+			compatible = "usb-c-connector";
+			data-role = "dual";
+			label = "USB-C";
+			power-role = "sink";
+			try-power-role = "sink";
+			op-sink-microwatt = <10000000>;
+			sink-pdos = <PDO_FIXED(5000, 3000, PDO_FIXED_USB_COMM)
+				     PDO_VAR(5000, 20000, 5000)>;
+		};
 	};
 
 	mp8859: regulator at 66 {
-- 
2.25.1