imx: Add basic support for the NXP IMXRT10xx SoC family

Add i.IMXRT family basic support.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

arch/arm/Kconfig

@@ -807,6 +807,14 @@ config ARCH_IMX8M
 	select SUPPORT_SPL
 	imply CMD_DM
 
+config ARCH_IMXRT
+	bool "NXP i.MXRT platform"
+	select CPU_V7M
+	select DM
+	select DM_SERIAL
+	select SUPPORT_SPL
+	imply CMD_DM
+
 config ARCH_MX23
 	bool "NXP i.MX23 family"
 	select CPU_ARM926EJS
@@ -1732,6 +1740,8 @@ source "arch/arm/mach-imx/imx8/Kconfig"
 
 source "arch/arm/mach-imx/imx8m/Kconfig"
 
+source "arch/arm/mach-imx/imxrt/Kconfig"
+
 source "arch/arm/mach-imx/mxs/Kconfig"
 
 source "arch/arm/mach-omap2/Kconfig"

arch/arm/Makefile

@@ -104,11 +104,11 @@ libs-y += arch/arm/cpu/
 libs-y += arch/arm/lib/
 
 ifeq ($(CONFIG_SPL_BUILD),y)
-ifneq (,$(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_MX35)$(filter $(SOC), mx25 mx5 mx6 mx7 mx35 imx8m imx8))
+ifneq (,$(CONFIG_MX23)$(CONFIG_MX28)$(CONFIG_MX35)$(filter $(SOC), mx25 mx5 mx6 mx7 mx35 imx8m imx8 imxrt))
 libs-y += arch/arm/mach-imx/
 endif
 else
-ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs imx8m imx8 vf610))
+ifneq (,$(filter $(SOC), mx25 mx27 mx5 mx6 mx7 mx7ulp mx31 mx35 mxs imx8m imx8 imxrt vf610))
 libs-y += arch/arm/mach-imx/
 endif
 endif

arch/arm/include/asm/arch-imxrt/clock.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#ifndef __ASM_ARCH_CLOCK_H
+#define __ASM_ARCH_CLOCK_H
+
+#endif /* __ASM_ARCH_CLOCK_H */

arch/arm/include/asm/arch-imxrt/gpio.h

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#ifndef __ASM_ARCH_GPIO_H__
+#define __ASM_ARCH_GPIO_H__
+
+#if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))
+/* GPIO registers */
+struct gpio_regs {
+	u32 gpio_dr;	/* data */
+	u32 gpio_dir;	/* direction */
+	u32 gpio_psr;	/* pad satus */
+};
+#endif
+
+#endif /* __ASM_ARCH_GPIO_H__ */

arch/arm/include/asm/arch-imxrt/imx-regs.h

@@ -0,0 +1,20 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright(C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#ifndef __ASM_ARCH_IMX_REGS_H__
+#define __ASM_ARCH_IMX_REGS_H__
+
+#define ARCH_MXC
+
+#define GPIO1_BASE_ADDR		0x401B8000
+#define GPIO2_BASE_ADDR		0x401BC000
+#define GPIO3_BASE_ADDR		0x401C0000
+#define GPIO4_BASE_ADDR		0x401C4000
+#define GPIO5_BASE_ADDR		0x400C0000
+
+#define ANATOP_BASE_ADDR	0x400d8000
+
+#endif /* __ASM_ARCH_IMX_REGS_H__ */

arch/arm/include/asm/arch-imxrt/imxrt.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#ifndef _ASM_ARCH_IMXRT_H
+#define _ASM_ARCH_IMXRT_H
+
+#endif /* _ASM_ARCH_IMXRT_H */
+

arch/arm/include/asm/arch-imxrt/sys_proto.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2017 NXP
+ */
+
+#ifndef _ASM_ARCH_SYS_PROTO_H
+#define _ASM_ARCH_SYS_PROTO_H
+
+#include <asm/mach-imx/sys_proto.h>
+
+#endif /* _ASM_ARCH_SYS_PROTO_H */

arch/arm/mach-imx/Makefile

@@ -27,7 +27,7 @@ endif
 obj-$(CONFIG_GPT_TIMER) += timer.o
 obj-$(CONFIG_SYS_I2C_MXC) += i2c-mxv7.o
 endif
-ifeq ($(SOC),$(filter $(SOC),mx7 mx6 mxs imx8m imx8))
+ifeq ($(SOC),$(filter $(SOC),mx7 mx6 mxs imx8m imx8 imxrt))
 obj-y	+= misc.o
 obj-$(CONFIG_SPL_BUILD)	+= spl.o
 endif
@@ -226,5 +226,6 @@ obj-$(CONFIG_MX7) += mx7/
 obj-$(CONFIG_ARCH_MX7ULP) += mx7ulp/
 obj-$(CONFIG_IMX8M) += imx8m/
 obj-$(CONFIG_ARCH_IMX8) += imx8/
+obj-$(CONFIG_ARCH_IMXRT) += imxrt/
 
 obj-$(CONFIG_SPL_BOOTROM_SUPPORT) += spl_imx_romapi.o

arch/arm/mach-imx/imxrt/Kconfig

@@ -0,0 +1,13 @@
+if ARCH_IMXRT
+
+config IMXRT
+	bool
+
+config IMXRT1050
+	bool
+	select IMXRT
+
+config SYS_SOC
+	default "imxrt"
+
+endif

arch/arm/mach-imx/imxrt/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# (C) Copyright 2019
+# Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+#
+
+obj-y	:= soc.o

arch/arm/mach-imx/imxrt/soc.c

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <asm/armv7_mpu.h>
+
+int arch_cpu_init(void)
+{
+	int i;
+
+	struct mpu_region_config imxrt1050_region_config[] = {
+		{ 0x00000000, REGION_0, XN_DIS, PRIV_RW_USR_RW,
+		  STRONG_ORDER, REGION_4GB },
+		{ PHYS_SDRAM, REGION_1, XN_DIS, PRIV_RW_USR_RW,
+		  O_I_WB_RD_WR_ALLOC, (ffs(PHYS_SDRAM_SIZE) - 2) },
+		{ DMAMEM_BASE,
+		  REGION_2, XN_DIS, PRIV_RW_USR_RW,
+		  STRONG_ORDER, (ffs(DMAMEM_SZ_ALL) - 2) },
+	};
+
+	/*
+	 * Configure the memory protection unit (MPU) to allow full access to
+	 * the whole 4GB address space.
+	 */
+	disable_mpu();
+	for (i = 0; i < ARRAY_SIZE(imxrt1050_region_config); i++)
+		mpu_config(&imxrt1050_region_config[i]);
+	enable_mpu();
+
+	return 0;
+}