ipq806x: Add support for linux-4.4

1)Changes

- Rebased the patches for linux-4.4.7
- Added patch to fix spi nor fifo and dma support
- Added patch to configure watchdog barktime

2)Testing

Tested on IPQ AP148 Board:
 a. NOR boot and NAND boot
 b. ethernet network and ath10k wifi
 c. ubi sysupgrade

UnTested
 dwc3 usb has not been validated on IPQ board(AP148)

3)Known Issues:
 Once we flash ubi image on AP148, and if we reset the board, uboot on
 first boot creates PEB and LEB for dynamic sized partitions, which is incorrect
 and not what linux expects which causes errors when trying to mount rootfs.
 In order to test this, we can use the below steps:
  a. Flash the ubi image on board and don't reset the board
  b. load the kernel fit image in RAM and boot from there.

Signed-off-by: Ram Chandra Jangir <rjangi@codeaurora.org>

1 files changed, 62 insertions, 0 deletions

diff --git a/target/linux/ipq806x/patches-4.4/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch b/target/linux/ipq806x/patches-4.4/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch
new file mode 100644
index 0000000..c0281ff
--- /dev/null
+++ b/target/linux/ipq806x/patches-4.4/300-arch-arm-force-ZRELADDR-on-arch-qcom.patch
@@ -0,0 +1,62 @@
+From b12e230f09d4481424e6a5d7e2ae566b6954e83f Mon Sep 17 00:00:00 2001
+From: Mathieu Olivari <mathieu@codeaurora.org>
+Date: Wed, 29 Apr 2015 15:21:46 -0700
+Subject: [PATCH] HACK: arch: arm: force ZRELADDR on arch-qcom
+
+ARCH_QCOM is using the ARCH_MULTIPLATFORM option, as now recommended
+on most ARM architectures. This automatically calculate ZRELADDR by
+masking PHYS_OFFSET with 0xf8000000.
+
+However, on IPQ806x, the first ~20MB of RAM is reserved for the hardware
+network accelerators, and the bootloader removes this section from the
+layout passed from the ATAGS (when used).
+
+For newer bootloader, when DT is used, this is not a problem, we just
+reserve this memory in the device tree. But if the bootloader doesn't
+have DT support, then ATAGS have to be used. In this case, the ARM
+decompressor will position the kernel in this low mem, which will not be
+in the RAM section mapped by the bootloader, which means the kernel will
+freeze in the middle of the boot process trying to map the memory.
+
+As a work around, this patch allows disabling AUTO_ZRELADDR when
+ARCH_QCOM is selected. It makes the zImage usage possible on bootloaders
+which don't support device-tree, which is the case on certain early
+IPQ806x based designs.
+
+Signed-off-by: Mathieu Olivari <mathieu@codeaurora.org>
+---
+ arch/arm/Kconfig                 | 2 +-
+ arch/arm/Makefile                | 2 ++
+ arch/arm/mach-qcom/Makefile.boot | 1 +
+ 3 files changed, 4 insertions(+), 1 deletion(-)
+ create mode 100644 arch/arm/mach-qcom/Makefile.boot
+
+--- a/arch/arm/Kconfig
++++ b/arch/arm/Kconfig
+@@ -323,7 +323,7 @@
+ 	select ARCH_WANT_OPTIONAL_GPIOLIB
+ 	select ARM_HAS_SG_CHAIN
+ 	select ARM_PATCH_PHYS_VIRT
+-	select AUTO_ZRELADDR
++	select AUTO_ZRELADDR if !ARCH_QCOM
+ 	select CLKSRC_OF
+ 	select COMMON_CLK
+ 	select GENERIC_CLOCKEVENTS
+--- a/arch/arm/Makefile
++++ b/arch/arm/Makefile
+@@ -256,9 +256,11 @@
+ else
+ MACHINE  :=
+ endif
++ifeq ($(CONFIG_ARCH_QCOM),)
+ ifeq ($(CONFIG_ARCH_MULTIPLATFORM),y)
+ MACHINE  :=
+ endif
++endif
+ 
+ machdirs := $(patsubst %,arch/arm/mach-%/,$(machine-y))
+ platdirs := $(patsubst %,arch/arm/plat-%/,$(sort $(plat-y)))
+--- /dev/null
++++ b/arch/arm/mach-qcom/Makefile.boot
+@@ -0,0 +1 @@
++zreladdr-y+= 0x42208000