linux-kernel - [PATCH 2/2] ARM: dts: Add support for pcb8385

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Message-ID: <20251117125709.102013-3-horatiu.vultur@microchip.com>
Date: Mon, 17 Nov 2025 13:57:09 +0100
From: Horatiu Vultur <horatiu.vultur@...rochip.com>
To: <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>,
	<nicolas.ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
	<claudiu.beznea@...on.dev>, <wsa+renesas@...g-engineering.com>,
	<romain.sioen@...rochip.com>
CC: <devicetree@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH 2/2] ARM: dts: Add support for pcb8385

Add basic support for pcb8385 [1]. It is a modular board which allows
to add different daughter cards on which there are different PHYs.
This adds support for UART, LEDs and I2C.

[1] https://www.microchip.com/en-us/development-tool/ev83e85a

Signed-off-by: Horatiu Vultur <horatiu.vultur@...rochip.com>
---
 arch/arm/boot/dts/microchip/Makefile          |   3 +-
 .../boot/dts/microchip/lan966x-pcb8385.dts    | 137 ++++++++++++++++++
 2 files changed, 139 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/boot/dts/microchip/lan966x-pcb8385.dts

diff --git a/arch/arm/boot/dts/microchip/Makefile b/arch/arm/boot/dts/microchip/Makefile
index 79cd38fdc7dab..08986c24a4700 100644
--- a/arch/arm/boot/dts/microchip/Makefile
+++ b/arch/arm/boot/dts/microchip/Makefile
@@ -102,4 +102,5 @@ dtb-$(CONFIG_SOC_LAN966) += \
 	lan966x-kontron-kswitch-d10-mmt-8g.dtb \
 	lan966x-pcb8290.dtb \
 	lan966x-pcb8291.dtb \
-	lan966x-pcb8309.dtb
+	lan966x-pcb8309.dtb \
+	lan966x-pcb8385.dtb
diff --git a/arch/arm/boot/dts/microchip/lan966x-pcb8385.dts b/arch/arm/boot/dts/microchip/lan966x-pcb8385.dts
new file mode 100644
index 0000000000000..f4817cee93436
--- /dev/null
+++ b/arch/arm/boot/dts/microchip/lan966x-pcb8385.dts
@@ -0,0 +1,137 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * lan966x-pcb8385.dts - Device Tree file for PCB8385
+ */
+/dts-v1/;
+
+#include "lan966x.dtsi"
+#include "dt-bindings/phy/phy-lan966x-serdes.h"
+
+/ {
+	model = "Microchip EVB - LAN9668";
+	compatible = "microchip,lan9668-pcb8385", "microchip,lan9668", "microchip,lan966";
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	aliases {
+		serial0 = &usart3;
+	};
+
+	gpio-restart {
+		compatible = "gpio-restart";
+		gpios = <&gpio 59 GPIO_ACTIVE_LOW>;
+		open-source;
+		priority = <200>;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led-p1-green {
+			label = "cu0:green";
+			gpios = <&sgpio_out 2 0 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+			linux,default-trigger = "e200413c.mdio-mii:01:link";
+		};
+
+		led-p1-yellow {
+			label = "cu0:yellow";
+			gpios = <&sgpio_out 2 1 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+
+		led-p2-green {
+			label = "cu1:green";
+			gpios = <&sgpio_out 3 0 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+			linux,default-trigger = "e200413c.mdio-mii:02:link";
+		};
+
+		led-p2-yellow {
+			label = "cu1:yellow";
+			gpios = <&sgpio_out 3 1 GPIO_ACTIVE_LOW>;
+			default-state = "off";
+		};
+	};
+};
+
+&aes {
+	status = "disabled"; /* Reserved by secure OS */
+};
+
+&gpio {
+	fc0_b_pins: fc0-b-pins {
+		/* SCL, SDA */
+		pins = "GPIO_25", "GPIO_26";
+		function = "fc0_b";
+	};
+
+	fc3_b_pins: fc3-b-pins {
+		/* RX, TX */
+		pins = "GPIO_52", "GPIO_53";
+		function = "fc3_b";
+	};
+
+	sgpio_a_pins: sgpio-a-pins {
+		/* SCK, D0, D1, LD */
+		pins = "GPIO_32", "GPIO_33", "GPIO_34", "GPIO_35";
+		function = "sgpio_a";
+	};
+};
+
+&flx0 {
+	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
+	status = "okay";
+
+	i2c0: i2c@600 {
+		pinctrl-0 = <&fc0_b_pins>;
+		pinctrl-names = "default";
+		dmas = <0>, <0>;
+		i2c-analog-filter;
+		i2c-digital-filter;
+		i2c-digital-filter-width-ns = <35>;
+		i2c-sda-hold-time-ns = <1500>;
+		status = "okay";
+	};
+};
+
+&flx3 {
+	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_USART>;
+	status = "okay";
+
+	usart3: serial@200 {
+		pinctrl-0 = <&fc3_b_pins>;
+		pinctrl-names = "default";
+		status = "okay";
+	};
+};
+
+&i2c0 {
+	eeprom@54 {
+		compatible = "atmel,24c01";
+		reg = <0x54>;
+		status = "okay";
+	};
+
+	eeprom@55 {
+		compatible = "atmel,24c01";
+		reg = <0x55>;
+		status = "okay";
+	};
+};
+
+&sgpio {
+	pinctrl-0 = <&sgpio_a_pins>;
+	pinctrl-names = "default";
+	microchip,sgpio-port-ranges = <0 3>;
+	status = "okay";
+
+	gpio@0 {
+		ngpios = <64>;
+	};
+	gpio@1 {
+		ngpios = <64>;
+	};
+};
-- 
2.34.1