[PATCH v2] arm64: dts: amlogic: add the type-c controller on Radxa Zero 2

[Ricardo Pardini via B4 Relay]

From: Ricardo Pardini <ricardo at pardini.net>

The Radxa Zero2 has an FUSB302 controller on i2c3 at address 0x22 and
INT# wired to GPIOA-13; include a minimal connector.

Signed-off-by: Ricardo Pardini <ricardo at pardini.net>
---
This series adds a few things missing from the Radxa Zero 2:

1) NPU (etnaviv), just enable the node, similar to what was done for VIM3
   (dropped as was already picked up in [1])
2) i2c3 (also exposed on the 40-pin header) and the FUSB302 at 0x22.
   Describes it minimally, adding no functionality, but reserving the 0x22
   address since i2c3 is also exposed on user-accessible 40-pin header.

Krzysztof: v1 followed the node name I had found used in amlogic; I've
           looked around more broadly and found 'fusb0: typec-portc at 22'
           to be quite popular, so went with this. Hope it is acceptable.

Neil: I've fixed the interrupts pin, and described the required connector
      even more minimally than you suggested, as to avoid including pd.h.
      It is also done this way in a few other boards, hope it's correct.
      I've rebased your/Christian's full-enablement patches on top of this,
      tested with an r8152 which then works both ways, it's available at [2]

[1] https://git.kernel.org/amlogic/c/29deec49146162d06b17739c627d062191e03814
[2] https://github.com/rpardini/linux/tree/radxa-zero2-fusb302-minimal-plus-full-impl-rebase
---
Changes in v2:
- npu: dropped NPU enablement patch as it was already picked up by Neil
- fusb302: dropped 'status = "okay"'
- fusb302: declare as 'fusb0: typec-portc at 22' instead of 'fusb302 at 22'
- fusb302: use correct pin (74 -> gpioA13) for interrupts
- fusb302: add a (very minimal) connector so dtbs_check passes
- Link to v1: https://lore.kernel.org/r/20260114-arm64-dts-amlogic-radxa-zero2-additions-v1-0-8b5cdf328fde@pardini.net
---
 .../boot/dts/amlogic/meson-g12b-radxa-zero2.dts    | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts
index 1e5c6f9849456..5d32c04de938e 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-radxa-zero2.dts
@@ -364,12 +364,46 @@ hdmi_tx_tmds_out: endpoint {
 	};
 };
 
+/* Also exposed on the 40-pin header: SDA pin 3, SCL pin 5 */
+&i2c3 {
+	pinctrl-0 = <&i2c3_sda_a_pins>, <&i2c3_sck_a_pins>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	fusb0: typec-portc at 22 {
+		compatible = "fcs,fusb302";
+		reg = <0x22>;
+
+		pinctrl-0 = <&fusb302_irq_pins>;
+		pinctrl-names = "default";
+		interrupt-parent = <&gpio_intc>;
+		interrupts = <74 IRQ_TYPE_LEVEL_LOW>;
+
+		vbus-supply = <&ao_5v>;
+
+		connector {
+			compatible = "usb-c-connector";
+		};
+	};
+};
+
 &ir {
 	status = "disabled";
 	pinctrl-0 = <&remote_input_ao_pins>;
 	pinctrl-names = "default";
 };
 
+&periphs_pinctrl {
+	fusb302_irq_pins: fusb302-irq {
+		mux {
+			groups = "GPIOA_13";
+			function = "gpio_periphs";
+			bias-pull-up;
+			output-disable;
+		};
+	};
+};
+
 &pwm_ab {
 	pinctrl-0 = <&pwm_a_e_pins>;
 	pinctrl-names = "default";

---
base-commit: 0f61b1860cc3f52aef9036d7235ed1f017632193
change-id: 20260114-arm64-dts-amlogic-radxa-zero2-additions-905549fbed3e

Best regards,
-- 
Ricardo Pardini <ricardo at pardini.net>