sam9x75_curiosity: Add initial overlay for LAN8840 Daughter Card

Add initial overlay for LAN8840 RGMII PHY Daughter Card.
Enable the gmac node and add its pinctrl.
Enable flx7_twi node and add its pinctrl.

Signed-off-by: Mihai Sain <[email protected]>
Acked-by : Cristian Birsan <[email protected]>
Acked-by : Jerry Ray <[email protected]>

Author: Mihai Sain

sam9x75_curiosity.its

@@ -74,6 +74,21 @@
 				algo = "sha1";
 			};
 		};
+
+		fdt_gmac_lan8840 {
+			description = "Device Tree blob for LAN8840 RGMII PHY overlay";
+			data = /incbin/("./sam9x75_curiosity/sam9x75_curiosity_gmac_lan8840.dtbo");
+			type = "flat_dt";
+			arch = "arm";
+			compression = "none";
+			load = <0x23120000>;
+			hash-1 {
+				algo = "crc32";
+			};
+			hash-2 {
+				algo = "sha1";
+			};
+		};
 	};
 
 	configurations {
@@ -99,5 +114,10 @@
 			description = "FDT overlay blob for AC69T88A LVDS Display Panel";
 			fdt = "fdt_lvds_panel";
 		};
+
+		lan8840 {
+			description = "FDT overlay blob for LAN8840 RGMII PHY Daughter Card";
+			fdt = "fdt_gmac_lan8840";
+		};
 	};
 };

sam9x75_curiosity/sam9x75_curiosity_gmac_lan8840.dtso

@@ -0,0 +1,94 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Device Tree file for SAM9X75 CURIOSITY board overlay blob for the LAN8840 RGMII PHY Daughter Card.
+ *
+ * Copyright (C) 2023 Microchip Technology Inc. and its subsidiaries
+ *
+ * Author: Mihai Sain <[email protected]>
+ *
+ */
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/mfd/atmel-flexcom.h>
+#include <dt-bindings/pinctrl/at91.h>
+
+&flx7 {
+	atmel,flexcom-mode = <ATMEL_FLEXCOM_MODE_TWI>;
+	status = "okay";
+};
+
+&gmac {
+	phy-mode = "rgmii-id";
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gmac_rgmii_default>;
+	magic-packet;
+	status = "okay";
+
+	ethernet-phy@1 {
+		reg = <0x1>;
+		interrupt-parent = <&pioD>;
+		interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
+	};
+};
+
+&i2c7 {
+	#address-cells = <1>;
+	#size-cells = <0>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_flx7_twi_default>;
+	i2c-analog-filter;
+	i2c-digital-filter;
+	i2c-digital-filter-width-ns = <35>;
+	status = "okay";
+
+	eeprom@54 {
+		compatible = "atmel,24c01";
+		reg = <0x54>;
+		pagesize = <8>;
+		status = "okay";
+	};
+};
+
+&pinctrl {
+	flexcom {
+		pinctrl_flx7_twi_default: flx7-twi-default {
+			atmel,pins =
+				<AT91_PIOC 0 AT91_PERIPH_C AT91_PINCTRL_PULL_UP
+				 AT91_PIOC 1 AT91_PERIPH_C AT91_PINCTRL_PULL_UP>;
+		};
+	};
+
+	gmac {
+		pinctrl_gmac_rgmii_default: gmac-rgmii-default {
+			atmel,pins =
+				<AT91_PIOB 13 AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_TX0   */
+				 AT91_PIOB 14 AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_TX1   */
+				 AT91_PIOB 4  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_TX2   */
+				 AT91_PIOB 5  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_TX3   */
+				 AT91_PIOB 7  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_TXCTL  */
+				 AT91_PIOB 6  AT91_PERIPH_A (AT91_PINCTRL_PULL_UP | AT91_PINCTRL_SLEWRATE_DIS)	/* ETH_TXCK  */
+
+				 AT91_PIOB 11 AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_RX0   */
+				 AT91_PIOB 12 AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_RX1   */
+				 AT91_PIOB 0  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_RX2   */
+				 AT91_PIOB 1  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_RX3   */
+				 AT91_PIOB 8  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_RXCK   */
+				 AT91_PIOB 3  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_RXCTL */
+
+				 AT91_PIOB 10 AT91_PERIPH_A  AT91_PINCTRL_NONE					/* ETH_MDC   */
+				 AT91_PIOB 9  AT91_PERIPH_A  AT91_PINCTRL_NONE					/* ETH_MDIO  */
+
+				 AT91_PIOB 2  AT91_PERIPH_A  AT91_PINCTRL_SLEWRATE_DIS				/* ETH_125CK */
+				 AT91_PIOD 5  AT91_PERIPH_GPIO  AT91_PINCTRL_NONE>;				/* ETH_INT   */
+		};
+	};
+};
+
+&{/} {
+	model = "SAM9X75-Curiosity: LAN8840 RGMII PHY Daughter Card";
+};