ARM: dts: aspeed: Add AST2600 SoC support

AST2600 is the 7th generation of Aspeed SoC designated for
Interated Remote Management Processor.

AST2600 has significant performance improvement by integrating
1.2GHz dual-core ARM Cortex A7 (r0p5) CPU with FPU. Most of the
controllers are also improved with more features and better
performance than preceding AST24xx/AST25xx.

Signed-off-by: Chia-Wei, Wang <chiawei_wang@aspeedtech.com>
Reviewed-by: Ryan Chen <ryan_chen@aspeedtech.com>

arch/arm/dts/Makefile

@@ -960,6 +960,7 @@ dtb-$(CONFIG_ARCH_BCM6858) += \
 dtb-$(CONFIG_TARGET_BCMNS3) += ns3-board.dtb
 
 dtb-$(CONFIG_ASPEED_AST2500) += ast2500-evb.dtb
+dtb-$(CONFIG_ASPEED_AST2600) += ast2600-evb.dtb
 
 dtb-$(CONFIG_ARCH_STI) += stih410-b2260.dtb
 

arch/arm/dts/ast2600-evb.dts

@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/dts-v1/;
+
+#include "ast2600-u-boot.dtsi"
+
+/ {
+	memory {
+		device_type = "memory";
+		reg = <0x80000000 0x40000000>;
+	};
+
+	chosen {
+		stdout-path = &uart5;
+	};
+
+	aliases {
+		mmc0 = &emmc_slot0;
+		mmc1 = &sdhci_slot0;
+		mmc2 = &sdhci_slot1;
+		spi0 = &fmc;
+		spi1 = &spi1;
+		spi2 = &spi2;
+		ethernet0 = &mac0;
+		ethernet1 = &mac1;
+		ethernet2 = &mac2;
+		ethernet3 = &mac3;
+	};
+
+	cpus {
+		cpu@0 {
+			clock-frequency = <800000000>;
+		};
+		cpu@1 {
+			clock-frequency = <800000000>;
+		};
+	};
+};
+
+&uart5 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+};
+
+&sdrammc {
+	clock-frequency = <400000000>;
+};
+
+&wdt1 {
+	status = "okay";
+};
+
+&fmc {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_fmcquad_default>;
+
+	flash@0 {
+		compatible = "spi-flash", "sst,w25q256";
+		status = "okay";
+		spi-max-frequency = <50000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+	};
+
+	flash@1 {
+		compatible = "spi-flash", "sst,w25q256";
+		status = "okay";
+		spi-max-frequency = <50000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+	};
+
+	flash@2 {
+		compatible = "spi-flash", "sst,w25q256";
+		status = "okay";
+		spi-max-frequency = <50000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+	};
+};
+
+&spi1 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spi1_default &pinctrl_spi1abr_default
+			&pinctrl_spi1cs1_default &pinctrl_spi1wp_default
+			&pinctrl_spi1wp_default &pinctrl_spi1quad_default>;
+
+	flash@0 {
+		compatible = "spi-flash", "sst,w25q256";
+		status = "okay";
+		spi-max-frequency = <50000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+	};
+};
+
+&spi2 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spi2_default &pinctrl_spi2cs1_default
+			&pinctrl_spi2cs2_default &pinctrl_spi2quad_default>;
+
+	flash@0 {
+		compatible = "spi-flash", "sst,w25q256";
+		status = "okay";
+		spi-max-frequency = <50000000>;
+		spi-tx-bus-width = <4>;
+		spi-rx-bus-width = <4>;
+	};
+};
+
+&emmc {
+	u-boot,dm-pre-reloc;
+	timing-phase = <0x700ff>;
+};
+
+&emmc_slot0 {
+	u-boot,dm-pre-reloc;
+	status = "okay";
+	bus-width = <4>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_emmc_default>;
+	sdhci-drive-type = <1>;
+};
+
+&i2c4 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c5_default>;
+};
+
+&i2c5 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c6_default>;
+};
+
+&i2c6 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c7_default>;
+};
+
+&i2c7 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c8_default>;
+};
+
+&i2c8 {
+	status = "okay";
+
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c9_default>;
+};
+
+&scu {
+	mac0-clk-delay = <0x1d 0x1c
+			  0x10 0x17
+			  0x10 0x17>;
+	mac1-clk-delay = <0x1d 0x10
+			  0x10 0x10
+			  0x10 0x10>;
+	mac2-clk-delay = <0x0a 0x04
+			  0x08 0x04
+			  0x08 0x04>;
+	mac3-clk-delay = <0x0a 0x04
+			  0x08 0x04
+			  0x08 0x04>;
+};

arch/arm/dts/ast2600-u-boot.dtsi

@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <dt-bindings/clock/ast2600-clock.h>
+#include <dt-bindings/reset/ast2600-reset.h>
+
+#include "ast2600.dtsi"
+
+/ {
+	scu: clock-controller@1e6e2000 {
+		compatible = "aspeed,ast2600-scu";
+		reg = <0x1e6e2000 0x1000>;
+		u-boot,dm-pre-reloc;
+		#clock-cells = <1>;
+		#reset-cells = <1>;
+		uart-clk-source = <0x0>; /* uart clock source selection: 0: uxclk 1: huxclk*/
+	};
+
+	rst: reset-controller {
+		u-boot,dm-pre-reloc;
+		compatible = "aspeed,ast2600-reset";
+		aspeed,wdt = <&wdt1>;
+		#reset-cells = <1>;
+	};
+
+	sdrammc: sdrammc@1e6e0000 {
+		u-boot,dm-pre-reloc;
+		compatible = "aspeed,ast2600-sdrammc";
+		reg = <0x1e6e0000 0x100
+			0x1e6e0100 0x300
+			0x1e6e0400 0x200 >;
+		#reset-cells = <1>;
+		clocks = <&scu ASPEED_CLK_MPLL>;
+		resets = <&rst ASPEED_RESET_SDRAM>;
+	};
+
+	ahb {
+		u-boot,dm-pre-reloc;
+
+		apb {
+			u-boot,dm-pre-reloc;
+		};
+
+	};
+};
+