oxnas: reboot target

Reboot the oxnas target based on Linux 4.14 by rebasing our support on
top of the now-existing upstream kernel support.
This commit brings oxnas support to the level of v4.17 having upstream
drivers for Ethernet, Serial and NAND flash.
Botch up OpenWrt's local drivers for EHCI, SATA and PCIe based on the
new platform code and device-tree.
Re-introduce base-files from old oxnas target which works for now but
needs further clean-up towards generic board support.

Functional issues:
 * PCIe won't come up (hence no USB3 on Shuttle KD20)
 * I2C bus of Akitio myCloud device is likely not to work (missing
   debounce support in new pinctrl driver)

Code-style issues:
 * plla/pllb needs further cleanup -- currently their users are writing
   into the syscon regmap after acquireling the clk instead of using
   defined clk_*_*() functions to setup multipliers and dividors.
 * PCIe phy needs its own little driver.
 * SATA driver is a monster and should be split into an mfd having
   a raidctrl regmap, sata controller, sata ports and sata phy.

Tested on MitraStar STG-212 aka. Medion Akoya MD86xxx and Shuttle KD20.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
(squash-picked commit 17511a7ea8 and commit dcc34574ef from master)

3 files changed, 58 insertions, 0 deletions

diff --git a/target/linux/oxnas/ox810se/config-default b/target/linux/oxnas/ox810se/config-default
new file mode 100644
index 0000000000..e8257cef4d
--- /dev/null
+++ b/target/linux/oxnas/ox810se/config-default
@@ -0,0 +1,39 @@
+CONFIG_ARCH_MULTI_CPU_AUTO=y
+# CONFIG_ARCH_MULTI_V4 is not set
+# CONFIG_ARCH_MULTI_V4T is not set
+CONFIG_ARCH_MULTI_V4_V5=y
+CONFIG_ARCH_MULTI_V5=y
+# CONFIG_CACHE_L2X0 is not set
+CONFIG_CPU_32v5=y
+CONFIG_CPU_ABRT_EV5TJ=y
+CONFIG_CPU_ARM926T=y
+# CONFIG_CPU_CACHE_ROUND_ROBIN is not set
+CONFIG_CPU_CACHE_VIVT=y
+CONFIG_CPU_COPY_V4WB=y
+CONFIG_CPU_CP15=y
+CONFIG_CPU_CP15_MMU=y
+# CONFIG_CPU_DCACHE_WRITETHROUGH is not set
+# CONFIG_CPU_ICACHE_DISABLE is not set
+CONFIG_CPU_IDLE=y
+# CONFIG_CPU_IDLE_GOV_LADDER is not set
+CONFIG_CPU_IDLE_GOV_MENU=y
+CONFIG_CPU_IDLE_MULTIPLE_DRIVERS=y
+CONFIG_CPU_PABRT_LEGACY=y
+CONFIG_CPU_PM=y
+CONFIG_CPU_THUMB_CAPABLE=y
+CONFIG_CPU_TLB_V4WBI=y
+CONFIG_CPU_USE_DOMAINS=y
+# CONFIG_DEBUG_LL is not set
+# CONFIG_DEBUG_UNCOMPRESS is not set
+CONFIG_GENERIC_ATOMIC64=y
+CONFIG_MACH_OX810SE=y
+CONFIG_NEED_KUSER_HELPERS=y
+CONFIG_NEED_PER_CPU_KM=y
+# CONFIG_RCU_EXPERT is not set
+# CONFIG_RCU_NEED_SEGCBLIST is not set
+# CONFIG_RCU_STALL_COMMON is not set
+CONFIG_SPLIT_PTLOCK_CPUS=999999
+CONFIG_TINY_SRCU=y
+CONFIG_EXT4_FS=y
+CONFIG_FAT_FS=y
+CONFIG_FS_MBCACHE=y
diff --git a/target/linux/oxnas/ox810se/profiles/00-default.mk b/target/linux/oxnas/ox810se/profiles/00-default.mk
new file mode 100644
index 0000000000..275a9e1fbf
--- /dev/null
+++ b/target/linux/oxnas/ox810se/profiles/00-default.mk
@@ -0,0 +1,10 @@
+define Profile/Default
+	NAME:=Default Profile
+	PRIORITY:=1
+endef
+
+define Profile/Default/Description
+	Default package set compatible with most boards.
+endef
+
+$(eval $(call Profile,Default))
diff --git a/target/linux/oxnas/ox810se/target.mk b/target/linux/oxnas/ox810se/target.mk
new file mode 100644
index 0000000000..4031fc57c3
--- /dev/null
+++ b/target/linux/oxnas/ox810se/target.mk
@@ -0,0 +1,9 @@
+FEATURES+=source-only
+
+SUBTARGET:=ox810se
+BOARDNAME:=OX810SE
+CPU_TYPE:=arm926ej-s
+
+define Target/Description
+    Oxford OX810SE
+endef