[PATCH v3 1/7] ARM: lpc18xx: add basic support for NXP LPC18xx/43xx SoCs

[manabian@gmail.com (Joachim Eastwood)]

Add support for NXP's LPC18xx (Cortex-M3) and LPC43xx (Cortex-M4)
SoCs. These SoCs are NXP's high preformance MCU line and can run at
clock speeds up to 180 MHz for LPC18xx and 204 MHz for LPC43xx.

LPC43xx is more or less a LPC18xx with a Cortex-M4F core and a few
extra peripherals. The LPC43xx series also features one or two
Cortex-M0 cores that can be used to offload the main M4 core.

Signed-off-by: Joachim Eastwood <manabian@gmail.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
---
 arch/arm/Kconfig                    | 20 ++++++++++++++++++++
 arch/arm/Kconfig.debug              |  3 ++-
 arch/arm/Makefile                   |  1 +
 arch/arm/mach-lpc18xx/Makefile      |  1 +
 arch/arm/mach-lpc18xx/Makefile.boot |  3 +++
 arch/arm/mach-lpc18xx/board-dt.c    | 22 ++++++++++++++++++++++
 6 files changed, 49 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/mach-lpc18xx/Makefile
 create mode 100644 arch/arm/mach-lpc18xx/Makefile.boot
 create mode 100644 arch/arm/mach-lpc18xx/board-dt.c

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 45df48ba0b12..fba149165229 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -586,6 +586,26 @@ config ARCH_W90X900
 	  <http://www.nuvoton.com/hq/enu/ProductAndSales/ProductLines/
 		ConsumerElectronicsIC/ARMMicrocontroller/ARMMicrocontroller>
 
+config ARCH_LPC18XX
+	bool "NXP LPC18xx/LPC43xx"
+	depends on !MMU
+	select ARCH_HAS_RESET_CONTROLLER
+	select ARCH_REQUIRE_GPIOLIB
+	select ARM_AMBA
+	select ARM_NVIC
+	select AUTO_ZRELADDR
+	select CLKSRC_OF
+	select COMMON_CLK
+	select CPU_V7M
+	select GENERIC_CLOCKEVENTS
+	select NO_IOPORT_MAP
+	select PINCTRL
+	select SPARSE_IRQ
+	select USE_OF
+	help
+	  Support for NXP's LPC18xx Cortex-M3 and LPC43xx Cortex-M4
+	  high performance microcontrollers.
+
 config ARCH_LPC32XX
 	bool "NXP LPC32XX"
 	select ARCH_REQUIRE_GPIOLIB
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 0c12ffb155a2..b3b6469350c1 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1359,6 +1359,7 @@ config DEBUG_UART_PHYS
 	default 0x20201000 if DEBUG_BCM2835
 	default 0x3e000000 if DEBUG_BCM_KONA_UART
 	default 0x4000e400 if DEBUG_LL_UART_EFM32
+	default 0x40081000 if ARCH_LPC18XX
 	default 0x40090000 if ARCH_LPC32XX
 	default 0x40100000 if DEBUG_PXA_UART1
 	default 0x42000000 if ARCH_GEMINI
@@ -1562,7 +1563,7 @@ config UNCOMPRESS_INCLUDE
 	string
 	default "debug/uncompress.h" if ARCH_MULTIPLATFORM || ARCH_MSM || \
 					PLAT_SAMSUNG || ARCH_EFM32 || \
-					ARCH_SHMOBILE_LEGACY
+					ARCH_SHMOBILE_LEGACY || ARCH_LPC18XX
 	default "mach/uncompress.h"
 
 config EARLY_PRINTK
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 985227cbbd1b..90ddf851aece 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -167,6 +167,7 @@ machine-$(CONFIG_ARCH_IOP33X)		+= iop33x
 machine-$(CONFIG_ARCH_IXP4XX)		+= ixp4xx
 machine-$(CONFIG_ARCH_KEYSTONE)		+= keystone
 machine-$(CONFIG_ARCH_KS8695)		+= ks8695
+machine-$(CONFIG_ARCH_LPC18XX)		+= lpc18xx
 machine-$(CONFIG_ARCH_LPC32XX)		+= lpc32xx
 machine-$(CONFIG_ARCH_MESON)		+= meson
 machine-$(CONFIG_ARCH_MMP)		+= mmp
diff --git a/arch/arm/mach-lpc18xx/Makefile b/arch/arm/mach-lpc18xx/Makefile
new file mode 100644
index 000000000000..bd0b7b5d6e9d
--- /dev/null
+++ b/arch/arm/mach-lpc18xx/Makefile
@@ -0,0 +1 @@
+obj-y += board-dt.o
diff --git a/arch/arm/mach-lpc18xx/Makefile.boot b/arch/arm/mach-lpc18xx/Makefile.boot
new file mode 100644
index 000000000000..eacfc3f5c33e
--- /dev/null
+++ b/arch/arm/mach-lpc18xx/Makefile.boot
@@ -0,0 +1,3 @@
+# Empty file waiting for deletion once Makefile.boot isn't needed any more.
+# Patch waits for application at
+# http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=7889/1 .
diff --git a/arch/arm/mach-lpc18xx/board-dt.c b/arch/arm/mach-lpc18xx/board-dt.c
new file mode 100644
index 000000000000..fdcee78d1bc4
--- /dev/null
+++ b/arch/arm/mach-lpc18xx/board-dt.c
@@ -0,0 +1,22 @@
+/*
+ * Device Tree board file for NXP LPC18xx/43xx
+ *
+ * Copyright (C) 2015 Joachim Eastwood <manabian@gmail.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <asm/mach/arch.h>
+
+static const char *const lpc18xx_43xx_compat[] __initconst = {
+	"nxp,lpc1850",
+	"nxp,lpc4350",
+	"nxp,lpc4370",
+	NULL
+};
+
+DT_MACHINE_START(LPC18XXDT, "NXP LPC18xx/43xx (Device Tree)")
+	.dt_compat = lpc18xx_43xx_compat,
+MACHINE_END
-- 
1.8.0