JustOS/linux-6.13/arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso

// SPDX-License-Identifier: GPL-2.0-only OR MIT
/**
 * DT overlay for HSE NAND expansion card on AM642 EVM
 *
 * Copyright (C) 2021-2024 Texas Instruments Incorporated - https://www.ti.com/
 */

/dts-v1/;
/plugin/;
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
#include "k3-pinctrl.h"

&main_pmx0 {
	gpmc0_default_pins: gpmc0-default-pins {
		bootph-all;
		pinctrl-single,pins = <
			AM64X_IOPAD(0x0094, PIN_INPUT, 7) /* (T19) GPMC0_BE1n.GPIO0_36 */
			AM64X_IOPAD(0x003c, PIN_INPUT, 0) /* (T20) GPMC0_AD0 */
			AM64X_IOPAD(0x0040, PIN_INPUT, 0) /* (U21) GPMC0_AD1 */
			AM64X_IOPAD(0x0064, PIN_INPUT, 0) /* (R16) GPMC0_AD10 */
			AM64X_IOPAD(0x0068, PIN_INPUT, 0) /* (W20) GPMC0_AD11 */
			AM64X_IOPAD(0x006c, PIN_INPUT, 0) /* (W21) GPMC0_AD12 */
			AM64X_IOPAD(0x0070, PIN_INPUT, 0) /* (V18) GPMC0_AD13 */
			AM64X_IOPAD(0x0074, PIN_INPUT, 0) /* (Y21) GPMC0_AD14 */
			AM64X_IOPAD(0x0078, PIN_INPUT, 0) /* (Y20) GPMC0_AD15 */
			AM64X_IOPAD(0x0044, PIN_INPUT, 0) /* (T18) GPMC0_AD2 */
			AM64X_IOPAD(0x0048, PIN_INPUT, 0) /* (U20) GPMC0_AD3 */
			AM64X_IOPAD(0x004c, PIN_INPUT, 0) /* (U18) GPMC0_AD4 */
			AM64X_IOPAD(0x0050, PIN_INPUT, 0) /* (U19) GPMC0_AD5 */
			AM64X_IOPAD(0x0054, PIN_INPUT, 0) /* (V20) GPMC0_AD6 */
			AM64X_IOPAD(0x0058, PIN_INPUT, 0) /* (V21) GPMC0_AD7 */
			AM64X_IOPAD(0x005c, PIN_INPUT, 0) /* (V19) GPMC0_AD8 */
			AM64X_IOPAD(0x0060, PIN_INPUT, 0) /* (T17) GPMC0_AD9 */
			AM64X_IOPAD(0x0098, PIN_INPUT_PULLUP, 0) /* (W19) GPMC0_WAIT0 */
			AM64X_IOPAD(0x009c, PIN_INPUT_PULLUP, 0) /* (Y18) GPMC0_WAIT1 */
			AM64X_IOPAD(0x00a8, PIN_OUTPUT_PULLUP, 0) /* (R19) GPMC0_CSn0 */
			AM64X_IOPAD(0x00ac, PIN_OUTPUT_PULLUP, 0) /* (R20) GPMC0_CSn1 */
			AM64X_IOPAD(0x00b0, PIN_OUTPUT_PULLUP, 0) /* (P19) GPMC0_CSn2 */
			AM64X_IOPAD(0x00b4, PIN_OUTPUT_PULLUP, 0) /* (R21) GPMC0_CSn3 */
			AM64X_IOPAD(0x007c, PIN_OUTPUT, 0) /* (R17) GPMC0_CLK */
			AM64X_IOPAD(0x0084, PIN_OUTPUT, 0) /* (P16) GPMC0_ADVn_ALE */
			AM64X_IOPAD(0x0088, PIN_OUTPUT, 0) /* (R18) GPMC0_OEn_REn */
			AM64X_IOPAD(0x008c, PIN_OUTPUT, 0) /* (T21) GPMC0_WEn */
			AM64X_IOPAD(0x0090, PIN_OUTPUT, 0) /* (P17) GPMC0_BE0n_CLE */
			AM64X_IOPAD(0x00a0, PIN_OUTPUT_PULLUP, 0) /* (N16) GPMC0_WPn */
			AM64X_IOPAD(0x00a4, PIN_OUTPUT, 0) /* (N17) GPMC0_DIR */
		>;
	};
};

&main_gpio0 {
	gpmc0-hog {
		bootph-all;
		gpio-hog;
		gpios = <36 0>;
		input;
		line-name = "GPMC0_MUX_DIR";
	};
};

&elm0 {
	bootph-all;
	status = "okay";
};

&gpmc0 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&gpmc0_default_pins>;
	#address-cells = <2>;
	#size-cells = <1>;

	nand@0,0 {
		compatible = "ti,am64-nand";
		reg = <0 0 64>;		/* device IO registers */
		interrupt-parent = <&gpmc0>;
		interrupts = <0 IRQ_TYPE_NONE>, /* fifoevent */
			     <1 IRQ_TYPE_NONE>;	/* termcount */
		rb-gpios = <&gpmc0 0 GPIO_ACTIVE_HIGH>;	/* gpmc_wait0 */
		ti,nand-xfer-type = "prefetch-polled";
		ti,nand-ecc-opt = "bch8";	/* BCH8: Bootrom limitation */
		ti,elm-id = <&elm0>;
		nand-bus-width = <8>;
		gpmc,device-width = <1>;
		gpmc,sync-clk-ps = <0>;
		gpmc,cs-on-ns = <0>;
		gpmc,cs-rd-off-ns = <40>;
		gpmc,cs-wr-off-ns = <40>;
		gpmc,adv-on-ns = <0>;
		gpmc,adv-rd-off-ns = <25>;
		gpmc,adv-wr-off-ns = <25>;
		gpmc,we-on-ns = <0>;
		gpmc,we-off-ns = <20>;
		gpmc,oe-on-ns = <3>;
		gpmc,oe-off-ns = <30>;
		gpmc,access-ns = <30>;
		gpmc,rd-cycle-ns = <40>;
		gpmc,wr-cycle-ns = <40>;
		gpmc,bus-turnaround-ns = <0>;
		gpmc,cycle2cycle-delay-ns = <0>;
		gpmc,clk-activation-ns = <0>;
		gpmc,wr-access-ns = <40>;
		gpmc,wr-data-mux-bus-ns = <0>;

		partitions {
			compatible = "fixed-partitions";
			#address-cells = <1>;
			#size-cells = <1>;

			partition@0 {
				bootph-all;
				label = "NAND.tiboot3";
				reg = <0x00000000 0x00200000>;	/* 2M */
			};
			partition@200000 {
				bootph-all;
				label = "NAND.tispl";
				reg = <0x00200000 0x00200000>;	/* 2M */
			};
			partition@400000 {
				bootph-all;
				label = "NAND.tiboot3.backup";	/* 2M */
				reg = <0x00400000 0x00200000>;	/* BootROM looks at 4M */
			};
			partition@600000 {
				bootph-all;
				label = "NAND.u-boot";
				reg = <0x00600000 0x00400000>;	/* 4M */
			};
			partition@a00000 {
				bootph-all;
				label = "NAND.u-boot-env";
				reg = <0x00a00000 0x00040000>;	/* 256K */
			};
			partition@a40000 {
				bootph-all;
				label = "NAND.u-boot-env.backup";
				reg = <0x00a40000 0x00040000>;	/* 256K */
			};
			partition@a80000 {
				bootph-all;
				label = "NAND.file-system";
				reg = <0x00a80000 0x3f580000>;
			};
		};
	};
};