[PATCH v4 27/29] misc: lan966x_pci: Add dtsi/dtso nodes in order to support SFPs

[Herve Codina <herve.codina@bootlin.com>]

Add device-tree nodes needed to support SFPs.
Those nodes are:
 - the clock controller
 - the i2c controller
 - the i2c mux
 - the SFPs themselves and their related ports in the switch

Signed-off-by: Herve Codina <herve.codina@bootlin.com>
---
 drivers/misc/lan966x_evb_lan9662_nic.dtso | 96 +++++++++++++++++++++++
 drivers/misc/lan966x_pci.dtsi             | 42 ++++++++++
 2 files changed, 138 insertions(+)

diff --git a/drivers/misc/lan966x_evb_lan9662_nic.dtso b/drivers/misc/lan966x_evb_lan9662_nic.dtso
index 3ad50abee72d..20e1fe4f78bf 100644
--- a/drivers/misc/lan966x_evb_lan9662_nic.dtso
+++ b/drivers/misc/lan966x_evb_lan9662_nic.dtso
@@ -4,6 +4,7 @@
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/mfd/atmel-flexcom.h>
 #include <dt-bindings/phy/phy-lan966x-serdes.h>
 
 /dts-v1/;
@@ -27,15 +28,94 @@ __overlay__ {
 			#size-cells = <2>;
 
 			#include "lan966x_pci.dtsi"
+
+			i2c0_emux: i2c0-emux {
+				compatible = "i2c-mux-pinctrl";
+				#address-cells = <1>;
+				#size-cells = <0>;
+				i2c-parent = <&i2c0>;
+				pinctrl-names = "i2c102", "i2c103", "idle";
+				pinctrl-0 = <&i2cmux_0>;
+				pinctrl-1 = <&i2cmux_1>;
+				pinctrl-2 = <&i2cmux_pins>;
+
+				i2c102: i2c@0 {
+					reg = <0>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+				};
+
+				i2c103: i2c@1 {
+					reg = <1>;
+					#address-cells = <1>;
+					#size-cells = <0>;
+				};
+			};
+
+			sfp2: sfp2 {
+				compatible = "sff,sfp";
+				i2c-bus = <&i2c102>;
+				tx-disable-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
+				los-gpios = <&gpio 25 GPIO_ACTIVE_HIGH>;
+				mod-def0-gpios = <&gpio 18 GPIO_ACTIVE_LOW>;
+				tx-fault-gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
+			};
+
+			sfp3: sfp3 {
+				compatible = "sff,sfp";
+				i2c-bus = <&i2c103>;
+				tx-disable-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
+				los-gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;
+				mod-def0-gpios = <&gpio 19 GPIO_ACTIVE_LOW>;
+				tx-fault-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
+			};
 		};
 	};
 };
 
+&flx0 {
+	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
+	status = "okay";
+};
+
+&i2c0 {
+	pinctrl-0 = <&fc0_a_pins>;
+	pinctrl-names = "default";
+	i2c-analog-filter;
+	i2c-digital-filter;
+	i2c-digital-filter-width-ns = <35>;
+	status = "okay";
+};
+
 &gpio {
 	tod_pins: tod_pins {
 		pins = "GPIO_36";
 		function = "ptpsync_1";
 	};
+
+	fc0_a_pins: fcb4-i2c-pins {
+		/* RXD, TXD */
+		pins = "GPIO_9", "GPIO_10";
+		function = "fc0_a";
+	};
+
+	i2cmux_pins: i2cmux-pins {
+		pins = "GPIO_76", "GPIO_77";
+		function = "twi_slc_gate";
+		output-low;
+	};
+
+	i2cmux_0: i2cmux-0 {
+		pins = "GPIO_76";
+		function = "twi_slc_gate";
+		output-high;
+	};
+
+	i2cmux_1: i2cmux-1 {
+		pins = "GPIO_77";
+		function = "twi_slc_gate";
+		output-high;
+	};
 };
 
 &lan966x_phy0 {
@@ -64,6 +144,22 @@ &port1 {
 	status = "okay";
 };
 
+&port2 {
+	phy-mode = "sgmii";
+	phys = <&serdes 2 SERDES6G(0)>;
+	sfp = <&sfp2>;
+	managed = "in-band-status";
+	status = "okay";
+};
+
+&port3 {
+	phy-mode = "sgmii";
+	phys = <&serdes 3 SERDES6G(1)>;
+	sfp = <&sfp3>;
+	managed = "in-band-status";
+	status = "okay";
+};
+
 &switch {
 	pinctrl-names = "default";
 	pinctrl-0 = <&tod_pins>;
diff --git a/drivers/misc/lan966x_pci.dtsi b/drivers/misc/lan966x_pci.dtsi
index a7a72218a58c..789bb0ac5704 100644
--- a/drivers/misc/lan966x_pci.dtsi
+++ b/drivers/misc/lan966x_pci.dtsi
@@ -3,6 +3,7 @@
  * Copyright (C) 2025 Microchip UNG
  */
 
+#include <dt-bindings/clock/microchip,lan966x.h>
 #include <dt-bindings/interrupt-controller/irq.h>
 
 cpu_clk: clock-600000000 {
@@ -61,6 +62,39 @@ port1: port@1 {
 				reg = <1>;
 				status = "disabled";
 			};
+
+			port2: port@2 {
+				reg = <2>;
+				status = "disabled";
+			};
+
+			port3: port@3 {
+				reg = <3>;
+				status = "disabled";
+			};
+		};
+	};
+
+	flx0: flexcom@e0040000 {
+		compatible = "atmel,sama5d2-flexcom";
+		reg = <0xe0040000 0x100>;
+		clocks = <&clks GCK_ID_FLEXCOM0>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x0 0xe0040000 0x800>;
+		status = "disabled";
+
+		i2c0: i2c@600 {
+			compatible = "microchip,sam9x60-i2c";
+			reg = <0x600 0x200>;
+			interrupt-parent = <&oic>;
+			interrupts = <48 IRQ_TYPE_LEVEL_HIGH>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			clocks = <&clks GCK_ID_FLEXCOM0>;
+			assigned-clocks = <&clks GCK_ID_FLEXCOM0>;
+			assigned-clock-rates = <20000000>;
+			status = "disabled";
 		};
 	};
 
@@ -69,6 +103,14 @@ cpu_ctrl: syscon@e00c0000 {
 		reg = <0xe00c0000 0xa8>;
 	};
 
+	clks: clock-controller@e00c00a8 {
+		compatible = "microchip,lan966x-gck";
+		#clock-cells = <1>;
+		clocks = <&cpu_clk>, <&ddr_clk>, <&sys_clk>;
+		clock-names = "cpu", "ddr", "sys";
+		reg = <0xe00c00a8 0x38>, <0xe00c02cc 0x4>;
+	};
+
 	oic: oic@e00c0120 {
 		compatible = "microchip,lan966x-oic";
 		#interrupt-cells = <2>;
-- 
2.51.0