ARM: sunplus: Add initial support for Sunplus SP7021 SoC

This patch aims to add an initial support for Sunplus SP7021 SoC.

Signed-off-by: Qin Jian <qinjian@cqplus1.com>

MAINTAINERS

@@ -2659,6 +2659,7 @@ F:	Documentation/devicetree/bindings/arm/sunplus,sp7021.yaml
 F:	Documentation/devicetree/bindings/clock/sunplus,sp7021-clkc.yaml
 F:	Documentation/devicetree/bindings/interrupt-controller/sunplus,sp7021-intc.yaml
 F:	Documentation/devicetree/bindings/reset/sunplus,reset.yaml
+F:	arch/arm/mach-sunplus/
 F:	drivers/clk/clk-sp7021.c
 F:	drivers/irqchip/irq-sp7021-intc.c
 F:	drivers/reset/reset-sunplus.c

arch/arm/Kconfig

@@ -487,6 +487,24 @@ config ARCH_S3C24XX
 	  (<http://www.simtec.co.uk/products/EB110ITX/>), the IPAQ 1940 or the
 	  Samsung SMDK2410 development board (and derivatives).
 
+config ARCH_SUNPLUS
+	bool "Sunplus SoCs"
+	select CLKSRC_OF
+	select COMMON_CLK
+	select GENERIC_CLOCKEVENTS
+	select GENERIC_IRQ_CHIP
+	select GENERIC_IRQ_MULTI_HANDLER
+	select SERIAL_SUNPLUS
+	select SERIAL_SUNPLUS_CONSOLE
+	select USE_OF
+	select RTC_CLASS
+	select RESET_SUNPLUS
+	help
+	  Support for Sunplus SoC family: SP7021 and succeed SoCs based systems,
+	  such as the Banana Pi BPI-F2S development board ( and derivatives).
+	  (<http://www.sinovoip.com.cn/ecp_view.asp?id=586>)
+	  (<https://tibbo.com/store/plus1.html>)
+
 config ARCH_OMAP1
 	bool "TI OMAP1"
 	depends on MMU
@@ -689,6 +707,8 @@ source "arch/arm/mach-sti/Kconfig"
 
 source "arch/arm/mach-stm32/Kconfig"
 
+source "arch/arm/mach-sunplus/Kconfig"
+
 source "arch/arm/mach-sunxi/Kconfig"
 
 source "arch/arm/mach-tegra/Kconfig"

arch/arm/Makefile

@@ -152,6 +152,7 @@ textofs-$(CONFIG_ARCH_MSM8X60) := 0x00208000
 textofs-$(CONFIG_ARCH_MSM8960) := 0x00208000
 textofs-$(CONFIG_ARCH_MESON) := 0x00208000
 textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
+textofs-$(CONFIG_ARCH_SUNPLUS) := 0x00308000
 
 # Machine directory name.  This list is sorted alphanumerically
 # by CONFIG_* macro name.
@@ -212,6 +213,7 @@ machine-$(CONFIG_ARCH_RENESAS)	 	+= shmobile
 machine-$(CONFIG_ARCH_INTEL_SOCFPGA)	+= socfpga
 machine-$(CONFIG_ARCH_STI)		+= sti
 machine-$(CONFIG_ARCH_STM32)		+= stm32
+machine-$(CONFIG_ARCH_SUNPLUS)		+= sunplus
 machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
 machine-$(CONFIG_ARCH_TEGRA)		+= tegra
 machine-$(CONFIG_ARCH_U8500)		+= ux500

arch/arm/mach-sunplus/Kconfig

@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+config SOC_SP7021
+	bool "Sunplus SP7021 SoC support"
+	default y
+	select CPU_V7
+	select ARM_GIC
+	select SUNPLUS_SP7021_INTC
+	select HAVE_SMP
+	select ARM_PSCI
+	select COMMON_CLK_SP7021
+	select PINCTRL
+	select PINCTRL_SPPCTL
+	select OF_OVERLAY
+	select GPIOLIB
+	help
+	  Support for Sunplus SP7021 SoC. It is based on ARM 4-core
+	  Cotex-A7 with various peripherals (ex: I2C, SPI, SDIO,
+	  Ethernet and etc.), FPGA interface,  chip-to-chip bus.
+	  It is designed for industrial control.

arch/arm/mach-sunplus/Makefile

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the linux kernel.
+#
+
+# Object file lists.
+
+obj-$(CONFIG_SOC_SP7021)	+= sp7021.o
+

arch/arm/mach-sunplus/Makefile.boot

@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+zreladdr-$(CONFIG_ARCH_SUNPLUS) := 0x00308000

arch/arm/mach-sunplus/sp7021.c

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * Copyright (C) Sunplus Technology Co., Ltd.
+ *       All rights reserved.
+ */
+#include <linux/kernel.h>
+#include <asm/mach/arch.h>
+
+static const char *sp7021_compat[] __initconst = {
+	"sunplus,sp7021",
+	NULL
+};
+
+DT_MACHINE_START(SP7021_DT, "SP7021")
+	.dt_compat	= sp7021_compat,
+MACHINE_END