arm/airoha: add support for airoha en7523 SoC family

Basic support for en7523/en7529/en7562 SoCs. Within a patch
only serial console will be supported.

Signed-off-by: Mikhail Kshevetskiy <[email protected]>

6 files changed, 88 insertions, 0 deletions

diff --git a/arch/arm/dts/en7523-evb-u-boot.dtsi b/arch/arm/dts/en7523-evb-u-boot.dtsi
new file mode 100644
index 00000000000..c109d6794fb
--- /dev/null
+++ b/arch/arm/dts/en7523-evb-u-boot.dtsi
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/ {
+	/* When running as a first-stage bootloader this isn't filled in automatically */
+	memory@80000000 {
+		device_type = "memory";
+		reg = <0x80000000 0x10000000>;
+	};
+};
+
+#include "en7523-u-boot.dtsi"
diff --git a/arch/arm/dts/en7523-u-boot.dtsi b/arch/arm/dts/en7523-u-boot.dtsi
new file mode 100644
index 00000000000..34fa8069f9e
--- /dev/null
+++ b/arch/arm/dts/en7523-u-boot.dtsi
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+/ {
+	reserved-memory {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		atf-reserved-memory@80000000 {
+			no-map;
+			reg = <0x80000000 0x40000>;
+		};
+	};
+
+	scu: system-controller@1fa20000 {
+		compatible = "airoha,en7523-scu";
+		reg = <0x1fa20000 0x400>,
+		      <0x1fb00000 0x1000>;
+		#clock-cells = <1>;
+	};
+
+};
+
+&uart1 {
+	bootph-all;
+};
diff --git a/arch/arm/mach-airoha/Kconfig b/arch/arm/mach-airoha/Kconfig
index be3562ae3ff..b9cd0a413e1 100644
--- a/arch/arm/mach-airoha/Kconfig
+++ b/arch/arm/mach-airoha/Kconfig
@@ -6,6 +6,17 @@ config SYS_VENDOR
 choice
 	prompt "Airoha board select"
 
+config TARGET_EN7523
+	bool "Airoha EN7523 SoC"
+	select CPU_V7A
+	select ARMV7_SET_CORTEX_SMPEN
+	help
+	  The Airoha EN7523 family (en7523/en7529/en7562) is an ARM-based
+	  SoCs with a dual-core CPU. It comes with Wi-Fi 5/6 support and
+	  connectivity to Ethernet PHY, DDR, PCIe, USB, UART and VoIP.
+	  With advanced hardware design, EN7523 provides high processing
+	  performance and low power consumption.
+
 config TARGET_AN7581
 	bool "Airoha AN7581 SoC"
 	select ARM64
@@ -20,12 +31,15 @@ config TARGET_AN7581
 endchoice
 
 config SYS_SOC
+	default "en7523" if TARGET_EN7523
 	default "an7581" if TARGET_AN7581
 
 config SYS_BOARD
+	default "en7523" if TARGET_EN7523
 	default "an7581" if TARGET_AN7581
 
 config SYS_CONFIG_NAME
+	default "en7523" if TARGET_EN7523
 	default "an7581" if TARGET_AN7581
 
 endif
diff --git a/arch/arm/mach-airoha/Makefile b/arch/arm/mach-airoha/Makefile
index 215a300373b..91395b8a850 100644
--- a/arch/arm/mach-airoha/Makefile
+++ b/arch/arm/mach-airoha/Makefile
@@ -2,4 +2,5 @@
 
 obj-y	+= cpu.o
 
+obj-$(CONFIG_TARGET_EN7523) += en7523/
 obj-$(CONFIG_TARGET_AN7581) += an7581/
diff --git a/arch/arm/mach-airoha/en7523/Makefile b/arch/arm/mach-airoha/en7523/Makefile
new file mode 100644
index 00000000000..886ab7e4eb9
--- /dev/null
+++ b/arch/arm/mach-airoha/en7523/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier:	GPL-2.0
+
+obj-y += init.o
diff --git a/arch/arm/mach-airoha/en7523/init.c b/arch/arm/mach-airoha/en7523/init.c
new file mode 100644
index 00000000000..c1c1eeabdf5
--- /dev/null
+++ b/arch/arm/mach-airoha/en7523/init.c
@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Author: Mikhail Kshevetskiy <[email protected]>
+ */
+#include <fdtdec.h>
+#include <init.h>
+#include <sysreset.h>
+#include <asm/system.h>
+#include <linux/io.h>
+
+int print_cpuinfo(void)
+{
+	printf("CPU:   Airoha EN7523/EN7529/EN7562\n");
+	return 0;
+}
+
+int dram_init(void)
+{
+	return fdtdec_setup_mem_size_base();
+}
+
+int dram_init_banksize(void)
+{
+	return fdtdec_setup_memory_banksize();
+}
+
+void __noreturn reset_cpu(void)
+{
+	writel(0x80000000, 0x1FB00040);
+	while (1) {
+		/* loop forever */
+	}
+}