arm: mvebu: Add DM and OF_CONTROL support to SPL

This patch adds full DM support to the SPL on MVEBU. Currently
only serial is supported. Other drivers will follow.

This patch also adds the necessary config values for the DEBUG UART
to the MVEBU defconfig files. This came in handy while implementing
this DM support.

Additionally, the mvebu specific SPL linker script is removed and
this common one is used instead:

   arch/arm/cpu/u-boot-spl.lds

This common linker script already handles all special cases. No need
to reinvent the wheel for MVEBU here.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Dirk Eibach <dirk.eibach@gdsys.cc>
Cc: Simon Glass <sjg@chromium.org>

8 files changed, 32 insertions, 65 deletions

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 9bd6cf1d80..b886d01401 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -118,6 +118,8 @@ config ARCH_MVEBU
 	select OF_SEPARATE
 	select DM
 	select DM_SERIAL
+	select SPL_DM
+	select SPL_OF_CONTROL
 
 config TARGET_DEVKIT3250
 	bool "Support devkit3250"
diff --git a/arch/arm/dts/armada-370-xp.dtsi b/arch/arm/dts/armada-370-xp.dtsi
index a718866ba5..0b2a78d393 100644
--- a/arch/arm/dts/armada-370-xp.dtsi
+++ b/arch/arm/dts/armada-370-xp.dtsi
@@ -141,6 +141,7 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0 MBUS_ID(0xf0, 0x01) 0 0x100000>;
+			u-boot,dm-pre-reloc;
 
 			rtc@10300 {
 				compatible = "marvell,orion-rtc";
diff --git a/arch/arm/dts/armada-388-gp.dts b/arch/arm/dts/armada-388-gp.dts
index fd4f6fd8a2..f576e93826 100644
--- a/arch/arm/dts/armada-388-gp.dts
+++ b/arch/arm/dts/armada-388-gp.dts
@@ -122,6 +122,7 @@
 				pinctrl-names = "default";
 				pinctrl-0 = <&uart0_pins>;
 				status = "okay";
+				u-boot,dm-pre-reloc;
 			};
 
 			/* GE1 CON15 */
diff --git a/arch/arm/dts/armada-xp-gp.dts b/arch/arm/dts/armada-xp-gp.dts
index bf724ca96a..ca5f8bb210 100644
--- a/arch/arm/dts/armada-xp-gp.dts
+++ b/arch/arm/dts/armada-xp-gp.dts
@@ -148,6 +148,7 @@
 		internal-regs {
 			serial@12000 {
 				status = "okay";
+				u-boot,dm-pre-reloc;
 			};
 			serial@12100 {
 				status = "okay";
diff --git a/arch/arm/mach-mvebu/include/mach/config.h b/arch/arm/mach-mvebu/include/mach/config.h
index 3281d90cda..3d18827573 100644
--- a/arch/arm/mach-mvebu/include/mach/config.h
+++ b/arch/arm/mach-mvebu/include/mach/config.h
@@ -90,9 +90,4 @@
 #define CONFIG_SYS_TIMER_COUNTER	(MVEBU_TIMER_BASE + 0x14)
 #define CONFIG_SYS_TIMER_RATE		25000000
 
-/* Common SPL configuration */
-#ifndef CONFIG_SPL_LDSCRIPT
-#define CONFIG_SPL_LDSCRIPT		"arch/arm/mach-mvebu/u-boot-spl.lds"
-#endif
-
 #endif /* __MVEBU_CONFIG_H */
diff --git a/arch/arm/mach-mvebu/include/mach/soc.h b/arch/arm/mach-mvebu/include/mach/soc.h
index 22abde080e..800f5d55a2 100644
--- a/arch/arm/mach-mvebu/include/mach/soc.h
+++ b/arch/arm/mach-mvebu/include/mach/soc.h
@@ -49,8 +49,6 @@
 #define CONFIG_SYS_PL310_BASE	MVEBU_L2_CACHE_BASE
 #define MVEBU_SPI_BASE		(MVEBU_REGISTER(0x10600))
 #define MVEBU_TWSI_BASE		(MVEBU_REGISTER(0x11000))
-#define MVEBU_UART0_BASE	(MVEBU_REGISTER(0x12000))
-#define MVEBU_UART1_BASE	(MVEBU_REGISTER(0x12100))
 #define MVEBU_MPP_BASE		(MVEBU_REGISTER(0x18000))
 #define MVEBU_GPIO0_BASE	(MVEBU_REGISTER(0x18100))
 #define MVEBU_GPIO1_BASE	(MVEBU_REGISTER(0x18140))
diff --git a/arch/arm/mach-mvebu/spl.c b/arch/arm/mach-mvebu/spl.c
index 0ab729aa5d..4eeef2dcda 100644
--- a/arch/arm/mach-mvebu/spl.c
+++ b/arch/arm/mach-mvebu/spl.c
@@ -1,10 +1,13 @@
 /*
- * Copyright (C) 2014 Stefan Roese <sr@denx.de>
+ * Copyright (C) 2014-2015 Stefan Roese <sr@denx.de>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 
 #include <common.h>
+#include <dm.h>
+#include <debug_uart.h>
+#include <fdtdec.h>
 #include <spl.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
@@ -31,6 +34,8 @@ u32 spl_boot_mode(void)
 
 void board_init_f(ulong dummy)
 {
+	int ret;
+
 #ifndef CONFIG_MVEBU_BOOTROM_UARTBOOT
 	/*
 	 * Only call arch_cpu_init() when not returning to the
@@ -51,6 +56,27 @@ void board_init_f(ulong dummy)
 	 */
 	board_early_init_f();
 
+	/* Example code showing how to enable the debug UART on MVEBU */
+#ifdef EARLY_UART
+	/*
+	 * Debug UART can be used from here if required:
+	 *
+	 * debug_uart_init();
+	 * printch('a');
+	 * printhex8(0x1234);
+	 * printascii("string");
+	 */
+#endif
+
+	ret = spl_init();
+	if (ret) {
+		debug("spl_init() failed: %d\n", ret);
+		hang();
+	}
+
+	/* Use special translation offset for SPL */
+	dm_set_translation_offset(0xd0000000 - 0xf1000000);
+
 	preloader_console_init();
 
 	timer_init();
diff --git a/arch/arm/mach-mvebu/u-boot-spl.lds b/arch/arm/mach-mvebu/u-boot-spl.lds
deleted file mode 100644
index eee1db49ee..0000000000
--- a/arch/arm/mach-mvebu/u-boot-spl.lds
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * (C) Copyright 2002
- * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
- *
- * (C) Copyright 2010
- * Texas Instruments, <www.ti.com>
- *	Aneesh V <aneesh@ti.com>
- *
- * SPDX-License-Identifier:	GPL-2.0+
- */
-
-MEMORY { .sram : ORIGIN = CONFIG_SPL_TEXT_BASE,\
-		LENGTH = CONFIG_SPL_MAX_SIZE }
-MEMORY { .sdram : ORIGIN = CONFIG_SPL_BSS_START_ADDR, \
-		LENGTH = CONFIG_SPL_BSS_MAX_SIZE }
-
-OUTPUT_FORMAT("elf32-littlearm", "elf32-littlearm", "elf32-littlearm")
-OUTPUT_ARCH(arm)
-ENTRY(_start)
-SECTIONS
-{
-	.text      :
-	{
-		__start = .;
-		arch/arm/cpu/armv7/start.o	(.text*)
-		*(.text*)
-		*(.vectors)
-	} >.sram
-
-	. = ALIGN(4);
-	.rodata : { *(SORT_BY_ALIGNMENT(.rodata*)) } >.sram
-
-	. = ALIGN(4);
-	.data : { *(SORT_BY_ALIGNMENT(.data*)) } >.sram
-
-	. = ALIGN(4);
-	.u_boot_list : {
-		KEEP(*(SORT(.u_boot_list*_i2c_*)));
-	} >.sram
-
-	. = ALIGN(4);
-	__image_copy_end = .;
-
-	.end :
-	{
-		*(.__end)
-	}
-
-	.bss :
-	{
-		. = ALIGN(4);
-		__bss_start = .;
-		*(.bss*)
-		. = ALIGN(4);
-		__bss_end = .;
-	} >.sdram
-}