arm64: dts: ti: am642-evm: Add overlay for NAND expansion card

The NAND expansion card plugs in over the HSE (High Speed Expansion)
connector. Add support for it.

We add the ranges property to the GPMC node instead of the NAND
overlay file to prevent below warnings.

/fragment@3/__overlay__: Relying on default #address-cells value
/fragment@3/__overlay__: Relying on default #size-cells value

As GPMC is dedicated for NAND use on this board, it should be OK.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20240614-am642-evm-nand-v5-1-acf760896239@kernel.org
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

3 files changed, 144 insertions, 0 deletions

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 31b870601247..1e6fcd1ff7ba 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -49,6 +49,8 @@ dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-icssg1-dualemac-mii.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-pcie.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-hummingboard-t-usb3.dtb
+k3-am642-evm-nand-dtbs := k3-am642-evm.dtb k3-am642-evm-nand.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-nand.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
 dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-gpio-fan.dtbo
 dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-pcie-usb2.dtbo
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso b/arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso
new file mode 100644
index 000000000000..dc70b6fbc3d7
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso
@@ -0,0 +1,138 @@
+// 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_pins_default: gpmc0-pins-default {
+		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 {
+	gpio0-36 {
+		gpio-hog;
+		gpios = <36 0>;
+		input;
+		line-name = "GPMC0_MUX_DIR";
+	};
+};
+
+&elm0 {
+	status = "okay";
+};
+
+&gpmc0 {
+	status = "okay";
+	pinctrl-names = "default";
+	pinctrl-0 = <&gpmc0_pins_default>;
+	#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 {
+				label = "NAND.tiboot3";
+				reg = <0x00000000 0x00200000>;	/* 2M */
+			};
+			partition@200000 {
+				label = "NAND.tispl";
+				reg = <0x00200000 0x00200000>;	/* 2M */
+			};
+			partition@400000 {
+				label = "NAND.tiboot3.backup";	/* 2M */
+				reg = <0x00400000 0x00200000>;	/* BootROM looks at 4M */
+			};
+			partition@600000 {
+				label = "NAND.u-boot";
+				reg = <0x00600000 0x00400000>;	/* 4M */
+			};
+			partition@a00000 {
+				label = "NAND.u-boot-env";
+				reg = <0x00a00000 0x00040000>;	/* 256K */
+			};
+			partition@a40000 {
+				label = "NAND.u-boot-env.backup";
+				reg = <0x00a40000 0x00040000>;	/* 256K */
+			};
+			partition@a80000 {
+				label = "NAND.file-system";
+				reg = <0x00a80000 0x3f580000>;
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index e20e4ffd0f1f..9f691ed97791 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -817,3 +817,7 @@
 		rx-internal-delay-ps = <2000>;
 	};
 };
+
+&gpmc0 {
+	ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
+};