From 70cbf2f09784319d2773a09e26bba077f6af927b Mon Sep 17 00:00:00 2001
From: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>
Date: Tue, 25 Oct 2022 16:21:08 +0530
Subject: [PATCH] ARM: dts: at91: sam9x60ek: Enable NAND support

Enable the EBI and NAND flash controller. Define the pinctrl and
partition table

Signed-off-by: Balamanikandan Gunasundar <balamanikandan.gunasundar@microchip.com>
---
 arch/arm/dts/sam9x60ek.dts | 103 +++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)

diff --git a/arch/arm/dts/sam9x60ek.dts b/arch/arm/dts/sam9x60ek.dts
index eb44868a3e..1a02e2cb79 100644
--- a/arch/arm/dts/sam9x60ek.dts
+++ b/arch/arm/dts/sam9x60ek.dts
@@ -80,6 +80,44 @@
 			};
 
 			pinctrl {
+				nand {
+					pinctrl_nand_oe_we: nand-oe-we-0 {
+						atmel,pins =
+							<AT91_PIOD 0 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 1 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)>;
+					};
+
+					pinctrl_nand_rb: nand-rb-0 {
+						atmel,pins =
+							<AT91_PIOD 5 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;
+					};
+
+					pinctrl_nand_cs: nand-cs-0 {
+						atmel,pins =
+							<AT91_PIOD 4 AT91_PERIPH_GPIO AT91_PINCTRL_PULL_UP>;
+					};
+				};
+
+				ebi {
+					pinctrl_ebi_data_0_7: ebi-data-lsb-0 {
+						atmel,pins =
+							<AT91_PIOD 6 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 7 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 8 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 9 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 10 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 11 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 12 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 13 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)>;
+					};
+
+					pinctrl_ebi_addr_nand: ebi-addr-0 {
+						atmel,pins =
+							<AT91_PIOD 2 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)
+							 AT91_PIOD 3 AT91_PERIPH_A (AT91_PINCTRL_NONE | AT91_PINCTRL_SLEWRATE_DIS)>;
+					};
+				};
+
 				pinctrl_qspi: qspi {
 					atmel,pins =
 						<AT91_PIOB 19 AT91_PERIPH_A AT91_PINCTRL_NONE
@@ -106,6 +144,71 @@
 	};
 };
 
+&ebi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_ebi_addr_nand &pinctrl_ebi_data_0_7>;
+	status = "okay";
+
+	nand_controller: nand-controller {
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_nand_oe_we &pinctrl_nand_cs &pinctrl_nand_rb>;
+		status = "okay";
+
+		nand@3 {
+			reg = <0x3 0x0 0x800000>;
+			rb-gpios = <&pioD 5 GPIO_ACTIVE_HIGH>;
+			cs-gpios = <&pioD 4 GPIO_ACTIVE_HIGH>;
+			nand-bus-width = <8>;
+			nand-ecc-mode = "hw";
+			nand-ecc-strength = <8>;
+			nand-ecc-step-size = <512>;
+			nand-on-flash-bbt;
+			label = "atmel_nand";
+
+			partitions {
+				compatible = "fixed-partitions";
+				#address-cells = <1>;
+				#size-cells = <1>;
+
+				at91bootstrap@0 {
+					label = "at91bootstrap";
+					reg = <0x0 0x40000>;
+				};
+
+				uboot@40000 {
+					label = "u-boot";
+					reg = <0x40000 0xc0000>;
+				};
+
+				ubootenvred@100000 {
+					label = "U-Boot Env Redundant";
+					reg = <0x100000 0x40000>;
+				};
+
+				ubootenv@140000 {
+					label = "U-Boot Env";
+					reg = <0x140000 0x40000>;
+				};
+
+				dtb@180000 {
+					label = "device tree";
+					reg = <0x180000 0x80000>;
+				};
+
+				kernel@200000 {
+					label = "kernel";
+					reg = <0x200000 0x600000>;
+				};
+
+				rootfs@800000 {
+					label = "rootfs";
+					reg = <0x800000 0x1f800000>;
+				};
+			};
+		};
+	};
+};
+
 &macb0 {
 	phy-mode = "rmii";
 	status = "okay";
-- 
2.39.5