sun6i: Add defconfig for MSI Primo81 tablet

This patch uses the same ZQ and DRAM clock settings as in the
pre-installed Android firmware.

Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

board/sunxi/Kconfig

@@ -148,6 +148,19 @@ config TARGET_MINI_X
 	bool "MINI_X"
 	depends on MACH_SUN4I
 
+config TARGET_MSI_PRIMO81
+	bool "MSI Primo81 (7.85\" tablet)"
+	depends on MACH_SUN6I
+	---help---
+	The MSI Primo81 is an A31s based tablet, with 1G RAM, 16G NAND,
+	1024x768 IPS LCD display, mono speaker, 0.3 MP front camera, 2.0 MP
+	rear camera, 3500 mAh battery, gt911 touchscreen, mma8452 accelerometer
+	and rtl8188etv usb wifi. Has "power", "volume+" and "volume-" buttons
+	(both volume buttons are also connected to the UBOOT_SEL pin). The
+	external connectors are represented by MicroSD slot, MiniHDMI, MicroUSB
+	OTG and 3.5mm headphone jack. More details are available at
+	    http://linux-sunxi.org/MSI_Primo81
+
 config TARGET_BA10_TV_BOX
 	bool "BA10_TV_BOX"
 	depends on MACH_SUN4I

board/sunxi/MAINTAINERS

@@ -66,3 +66,8 @@ IPPO-Q8H-V5 BOARD
 M:	Chen-Yu Tsai <wens@csie.org>
 S:	Maintained
 F:	configs/Ippo_q8h_v5_defconfig
+
+MSI-PRIMO81 BOARD
+M:	Siarhei Siamashka <siarhei.siamashka@gmail.com>
+S:	Maintained
+F:	configs/MSI_Primo81_defconfig

configs/MSI_Primo81_defconfig

@@ -0,0 +1,12 @@
+CONFIG_SPL=y
+CONFIG_SYS_EXTRA_OPTIONS=""
+CONFIG_FDTFILE="sun6i-a31s-primo81.dtb"
+CONFIG_USB_KEYBOARD=n
++S:CONFIG_ARM=y
++S:CONFIG_ARCH_SUNXI=y
++S:CONFIG_MACH_SUN6I=y
++S:CONFIG_TARGET_MSI_PRIMO81=y
++S:CONFIG_DRAM_CLK=360
++S:CONFIG_DRAM_ZQ=122
+# Wifi power
++S:CONFIG_AXP221_DLDO1_VOLT=3300