lantiq: Add support for linux 4.4

The following patches were dropped because they are already applied
upstream:
- 0038-MIPS-lantiq-fpi-on-ar9.patch
- 0039-MIPS-lantiq-initialize-usb-on-boot.patch
- 0042-USB-DWC2-big-endian-support.patch
- 0043-gpio-stp-xway-fix-phy-mask.patch

All other patches were simply refreshed, except the following:
- 0001-MIPS-lantiq-add-pcie-driver.patch
  Changes to arch/mips/lantiq/xway/sysctrl.c (these changes disabled
  some PMU gates for the vrx200 / VR9 SoCs) were removed since the
  upstream kernel disables unused PMU gates automatically (since
  95135bfa7ead1becc2879230f72583dde2b71a0c
  "MIPS: Lantiq: Deactivate most of the devices by default").
- 0025-NET-MIPS-lantiq-adds-xrx200-net.patch
  Since OpenWrt commit 55ba20afcc2fe785146316e5be2c2473cb329885 drivers
  should use of_get_mac_address(). of_get_mac_address_mtd is not
  available for drivers anymore since it's called automatically within
  of_get_mac_address().
- 0028-NET-lantiq-various-etop-fixes.patch
  Same changes as in 0025-NET-MIPS-lantiq-adds-xrx200-net.patch

While refreshing the kernel configuration SPI support had to be moved to
config-4.4 because otherwise M25P80 was disabled.

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

SVN-Revision: 48307

1 files changed, 41 insertions, 0 deletions

diff --git a/target/linux/lantiq/patches-4.4/0015-MTD-lantiq-xway-remove-endless-loop.patch b/target/linux/lantiq/patches-4.4/0015-MTD-lantiq-xway-remove-endless-loop.patch
new file mode 100644
index 0000000000..4bd166863b
--- /dev/null
+++ b/target/linux/lantiq/patches-4.4/0015-MTD-lantiq-xway-remove-endless-loop.patch
@@ -0,0 +1,41 @@
+From 76e153079f02d26e3357302d2886a0c8aaaec64d Mon Sep 17 00:00:00 2001
+From: John Crispin <blogic@openwrt.org>
+Date: Sun, 28 Jul 2013 18:02:06 +0200
+Subject: [PATCH 15/36] MTD: lantiq: xway: remove endless loop
+
+The reset loop logic could run into a endless loop. Lets fix it as requested.
+
+--> http://lists.infradead.org/pipermail/linux-mtd/2012-September/044240.html
+
+Signed-off-by: John Crispin <blogic@openwrt.org>
+---
+ drivers/mtd/nand/xway_nand.c |   10 ++++++++--
+ 1 file changed, 8 insertions(+), 2 deletions(-)
+
+--- a/drivers/mtd/nand/xway_nand.c
++++ b/drivers/mtd/nand/xway_nand.c
+@@ -59,16 +59,22 @@ static u32 xway_latchcmd;
+ static void xway_reset_chip(struct nand_chip *chip)
+ {
+ 	unsigned long nandaddr = (unsigned long) chip->IO_ADDR_W;
++	unsigned long timeout;
+ 	unsigned long flags;
+ 
+ 	nandaddr &= ~NAND_WRITE_ADDR;
+ 	nandaddr |= NAND_WRITE_CMD;
+ 
+ 	/* finish with a reset */
++	timeout = jiffies + msecs_to_jiffies(20);
++
+ 	spin_lock_irqsave(&ebu_lock, flags);
+ 	writeb(NAND_WRITE_CMD_RESET, (void __iomem *) nandaddr);
+-	while ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0)
+-		;
++	do {
++		if ((ltq_ebu_r32(EBU_NAND_WAIT) & NAND_WAIT_WR_C) == 0)
++			break;
++		cond_resched();
++	} while (!time_after_eq(jiffies, timeout));
+ 	spin_unlock_irqrestore(&ebu_lock, flags);
+ }
+