[PATCH v3] arm64: dts: ti: am642-evm: Add overlay for NAND expansion card

From: Roger Quadros
Date: Tue Jan 23 2024 - 15:13:27 EST

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@xxxxxxxxxx>
---

Notes:
Changelog:
v3:
- Fix dtc warning by moving ranges property into the GPMC node
- update licence to GPL-2.0-only OR MIT and Copyright year to 2024
- don't drop k3-am642-evm.dtb target from Makefile

v2:
- Don't leave k3-am642-evm-nand.dtbo as an orphan. Make k3-am642-evm-nand.dtb
with the overlay applied on the base board.

arch/arm64/boot/dts/ti/Makefile | 2 +
arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso | 139 ++++++++++++++++++
arch/arm64/boot/dts/ti/k3-am642-evm.dts | 4 +
3 files changed, 145 insertions(+)
create mode 100644 arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso

diff --git a/arch/arm64/boot/dts/ti/Makefile b/arch/arm64/boot/dts/ti/Makefile
index 52c1dc910308..cb03d0013fca 100644
--- a/arch/arm64/boot/dts/ti/Makefile
+++ b/arch/arm64/boot/dts/ti/Makefile
@@ -38,6 +38,8 @@ dtb-$(CONFIG_ARCH_K3) += k3-am62x-sk-hdmi-audio.dtbo

# Boards with AM64x SoC
dtb-$(CONFIG_ARCH_K3) += k3-am642-evm.dtb
+k3-am642-evm-nand-dtbs := k3-am642-evm.dtb k3-am642-evm-nand.dtbo
+dtb-$(CONFIG_ARCH_K3) += k3-am642-evm-nand.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-phyboard-electra-rdk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-sk.dtb
dtb-$(CONFIG_ARCH_K3) += k3-am642-tqma64xxl-mbax4xxl.dtb
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..3d1c2111ec88
--- /dev/null
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm-nand.dtso
@@ -0,0 +1,139 @@
+// 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 8c5651d2cf5d..9c7ed3fd361d 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -731,3 +731,7 @@ &main_mcan1 {
pinctrl-0 = <&main_mcan1_pins_default>;
phys = <&transceiver2>;
};
+
+&gpmc0 {
+ ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
+};

base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d
--
2.34.1