sunxi: add Linksprite pcDuino v1/v2 support

Add support for a sun4i board built by Linksprite. This addition covers
both v1 and v2 versions. As the board has been working with 408MHz memory
setting in the u-boot-sunxi branch, and has been proven to be running stable
during my tests as well, a respective new DRAM config file is added as well.

Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

board/sunxi/Kconfig

@@ -124,6 +124,10 @@ config TARGET_IPPO_Q8H_V5
 	bool "IPPO_Q8H_V5"
 	depends on MACH_SUN8I
 
+config TARGET_PCDUINO
+	bool "PCDUINO"
+	depends on MACH_SUN4I
+
 config TARGET_PCDUINO3
 	bool "PCDUINO3"
 	depends on MACH_SUN7I

board/sunxi/MAINTAINERS

@@ -77,3 +77,8 @@ MSI-PRIMO81 BOARD
 M:	Siarhei Siamashka <siarhei.siamashka@gmail.com>
 S:	Maintained
 F:	configs/MSI_Primo81_defconfig
+
+LINKSPRITE-PCDUINO BOARD
+M:	Zoltan Herpai <wigyori@uid0.hu>
+S:	Maintained
+F:	configs/Linksprite_pcDuino_defconfig

board/sunxi/Makefile

@@ -33,6 +33,7 @@ obj-$(CONFIG_TARGET_MELE_M3)		+= dram_sun7i_384_1024_iow16.o
 obj-$(CONFIG_TARGET_MINI_X)		+= dram_sun4i_360_512.o
 obj-$(CONFIG_TARGET_MINI_X_1GB)		+= dram_sun4i_360_1024_iow16.o
 obj-$(CONFIG_TARGET_MSI_PRIMO73)	+= dram_sun7i_384_1024_iow16.o
+obj-$(CONFIG_TARGET_PCDUINO)		+= dram_sun4i_408_1024_iow8.o
 obj-$(CONFIG_TARGET_PCDUINO3)		+= dram_linksprite_pcduino3.o
 obj-$(CONFIG_TARGET_QT840A)		+= dram_sun7i_384_512_busw16_iow16.o
 obj-$(CONFIG_TARGET_R7DONGLE)		+= dram_r7dongle.o

board/sunxi/dram_sun4i_408_1024_iow8.c

@@ -0,0 +1,31 @@
+/* this file is generated, don't edit it yourself */
+
+#include <common.h>
+#include <asm/arch/dram.h>
+
+static struct dram_para dram_para = {
+	.clock = 408,
+	.type = 3,
+	.rank_num = 1,
+	.density = 2048,
+	.io_width = 8,
+	.bus_width = 32,
+	.cas = 6,
+	.zq = 123,
+	.odt_en = 0,
+	.size = 1024,
+	.tpr0 = 0x30926692,
+	.tpr1 = 0x1090,
+	.tpr2 = 0x1a0c8,
+	.tpr3 = 0,
+	.tpr4 = 0,
+	.tpr5 = 0,
+	.emr1 = 0,
+	.emr2 = 0,
+	.emr3 = 0,
+};
+
+unsigned long sunxi_dram_init(void)
+{
+	return dramc_init(&dram_para);
+}

configs/Linksprite_pcDuino_defconfig

@@ -0,0 +1,7 @@
+CONFIG_SPL=y
+CONFIG_SYS_EXTRA_OPTIONS="AXP209_POWER,SUNXI_EMAC,USB_EHCI"
+CONFIG_FDTFILE="sun4i-a10-pcduino.dtb"
++S:CONFIG_ARM=y
++S:CONFIG_ARCH_SUNXI=y
++S:CONFIG_MACH_SUN4I=y
++S:CONFIG_TARGET_PCDUINO=y