arm: dts: ti: Add GPMC NAND card support

Add support for AM62Q NAND card: X8 NAND EXPANSION
BOARD card (PROC143E1) for AM62x LP SK board. NAND
has partitions for different boot components as
below:

0x000000000000-0x000000200000 : "NAND.tiboot3
0x000000200000-0x000000400000 : "NAND.tispl
0x000000400000-0x000000600000 : "NAND.tiboot3.backup
0x000000600000-0x000000a00000 : "NAND.u-boot
0x000000a00000-0x000000a40000 : "NAND.u-boot-env
0x000000a40000-0x000000a80000 : "NAND.u-boot-env.backup
0x000000a80000-0x000040000000 : "NAND.file-system

Note, there is simply not enough SRAM to support
application of overlay and hence NAND addon card
is not modeled as overlay.

Signed-off-by: Nitin Yadav <n-yadav@ti.com>

2 files changed, 117 insertions, 0 deletions

diff --git a/arch/arm/dts/k3-am62x-lp-sk-nand.dtsi b/arch/arm/dts/k3-am62x-lp-sk-nand.dtsi
new file mode 100644
index 0000000000..6af804571d
--- /dev/null
+++ b/arch/arm/dts/k3-am62x-lp-sk-nand.dtsi
@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * DT overlay for HSE NAND expansion card on AM62X LP-SK
+ *
+ * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
+ */
+
+#ifdef CONFIG_NAND_OMAP_GPMC
+&elm0 {
+	u-boot,dm-spl;
+	status = "okay";
+};
+
+&main_pmx0 {
+	gpmc0_pins_default: gpmc0-pins-default {
+	       pinctrl-single,pins = <
+		       AM62X_IOPAD(0x003c, PIN_INPUT, 0) /* (M25) GPMC0_AD0 */
+		       AM62X_IOPAD(0x0040, PIN_INPUT, 0) /* (N23) GPMC0_AD1 */
+		       AM62X_IOPAD(0x0044, PIN_INPUT, 0) /* (N24) GPMC0_AD2 */
+		       AM62X_IOPAD(0x0048, PIN_INPUT, 0) /* (N25) GPMC0_AD3 */
+		       AM62X_IOPAD(0x004c, PIN_INPUT, 0) /* (P24) GPMC0_AD4 */
+		       AM62X_IOPAD(0x0050, PIN_INPUT, 0) /* (P22) GPMC0_AD5 */
+		       AM62X_IOPAD(0x0054, PIN_INPUT, 0) /* (P21) GPMC0_AD6 */
+		       AM62X_IOPAD(0x0058, PIN_INPUT, 0) /* (R23) GPMC0_AD7 */
+		       AM62X_IOPAD(0x0084, PIN_OUTPUT, 0) /* (L23) GPMC0_ADVn_ALE */
+		       AM62X_IOPAD(0x0088, PIN_OUTPUT, 0) /* (L24) GPMC0_OEn_REn */
+		       AM62X_IOPAD(0x008c, PIN_OUTPUT, 0) /* (L25) GPMC0_WEn */
+		       AM62X_IOPAD(0x0090, PIN_OUTPUT, 0) /* (M24) GPMC0_BE0n_CLE */
+		       AM62X_IOPAD(0x00a8, PIN_OUTPUT, 0) /* (M21) GPMC0_CSn0 */
+		       AM62X_IOPAD(0x0098, PIN_INPUT, 0) /* (U23) GPMC0_WAIT0 */
+		>;
+		u-boot,dm-spl;
+	};
+};
+
+&gpmc0 {
+	pinctrl-names = "default";
+	status = "okay";
+	pinctrl-0 = <&gpmc0_pins_default>;
+	ranges = <0 0 0x00 0x51000000 0x01000000>; /* CS0 space. Min partition = 16MB */
+	#address-cells = <2>;
+	#size-cells = <1>;
+	u-boot,dm-spl;
+
+	nand0_0: 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>;
+		u-boot,dm-spl;
+
+		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>;
+			};
+		};
+	};
+};
+
+
+#endif
diff --git a/arch/arm/dts/k3-am62x-lp-sk-u-boot.dtsi b/arch/arm/dts/k3-am62x-lp-sk-u-boot.dtsi
index 12bff527a4..1c8b7d0b9a 100644
--- a/arch/arm/dts/k3-am62x-lp-sk-u-boot.dtsi
+++ b/arch/arm/dts/k3-am62x-lp-sk-u-boot.dtsi
@@ -5,6 +5,7 @@
  */
 
 #include "k3-am62x-sk-common-u-boot.dtsi"
+#include "k3-am62x-lp-sk-nand.dtsi"
 
 &ospi0 {
 	u-boot,dm-spl;