Add initial kernel 2.6.28 support for atheros target. The include files moved from /include/asm-mips/mach-atheros/ to /arch/mips/include/asm/mach-atheros/ This patch is based on the old kernel 2.6.27 patches.

SVN-Revision: 14584

10 files changed, 514 insertions, 0 deletions

diff --git a/target/linux/atheros/patches-2.6.28/100-board.patch b/target/linux/atheros/patches-2.6.28/100-board.patch
new file mode 100644
index 0000000000..c7f374559f
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/100-board.patch
@@ -0,0 +1,66 @@
+--- a/arch/mips/Kconfig
++++ b/arch/mips/Kconfig
+@@ -60,6 +60,18 @@ config BCM47XX
+ 	help
+ 	 Support for BCM47XX based boards
+ 
++config ATHEROS
++	bool "Atheros SoC support (EXPERIMENTAL)"
++	depends on EXPERIMENTAL
++	select DMA_NONCOHERENT
++	select CEVT_R4K
++	select CSRC_R4K
++	select IRQ_CPU
++	select SYS_HAS_CPU_MIPS32_R1
++	select SYS_SUPPORTS_BIG_ENDIAN
++	select SYS_SUPPORTS_32BIT_KERNEL
++	select GENERIC_GPIO
++
+ config MIPS_COBALT
+ 	bool "Cobalt Server"
+ 	select CEVT_R4K
+@@ -597,6 +609,7 @@ config WR_PPMC
+ 
+ endchoice
+ 
++source "arch/mips/atheros/Kconfig"
+ source "arch/mips/alchemy/Kconfig"
+ source "arch/mips/basler/excite/Kconfig"
+ source "arch/mips/emma/Kconfig"
+--- a/arch/mips/Makefile
++++ b/arch/mips/Makefile
+@@ -278,6 +278,13 @@ libs-$(CONFIG_MIPS_XXS1500)	+= arch/mips
+ load-$(CONFIG_MIPS_XXS1500)	+= 0xffffffff80100000
+ 
+ #
++# Atheros AR5312/AR2312 WiSoC
++#
++core-$(CONFIG_ATHEROS)		+= arch/mips/atheros/
++cflags-$(CONFIG_ATHEROS)	+= -I$(srctree)/arch/mips/include/asm/mach-atheros
++load-$(CONFIG_ATHEROS)		+= 0xffffffff80041000
++
++#
+ # Cobalt Server
+ #
+ core-$(CONFIG_MIPS_COBALT)	+= arch/mips/cobalt/
+--- a/arch/mips/include/asm/bootinfo.h
++++ b/arch/mips/include/asm/bootinfo.h
+@@ -57,6 +57,18 @@
+ #define	MACH_MIKROTIK_RB532	0	/* Mikrotik RouterBoard 532 	*/
+ #define MACH_MIKROTIK_RB532A	1	/* Mikrotik RouterBoard 532A 	*/
+ 
++/*
++ * Valid machtype for group ATHEROS
++ */
++#define MACH_GROUP_ATHEROS	26
++#define MACH_ATHEROS_AR5312	0
++#define MACH_ATHEROS_AR2312	1
++#define MACH_ATHEROS_AR2313	2
++#define MACH_ATHEROS_AR2315	3
++#define MACH_ATHEROS_AR2316	4
++#define MACH_ATHEROS_AR2317	5
++#define MACH_ATHEROS_AR2318	6
++
+ #define CL_SIZE			COMMAND_LINE_SIZE
+ 
+ extern char *system_type;
diff --git a/target/linux/atheros/patches-2.6.28/110-spiflash.patch b/target/linux/atheros/patches-2.6.28/110-spiflash.patch
new file mode 100644
index 0000000000..4b9b9d6891
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/110-spiflash.patch
@@ -0,0 +1,20 @@
+--- a/drivers/mtd/devices/Kconfig
++++ b/drivers/mtd/devices/Kconfig
+@@ -104,6 +104,10 @@ config M25PXX_USE_FAST_READ
+ 	help
+ 	  This option enables FAST_READ access supported by ST M25Pxx.
+ 
++config MTD_SPIFLASH
++	tristate "Atheros AR2315/6/7 SPI Flash support"
++	depends on ATHEROS_AR5315
++
+ config MTD_SLRAM
+ 	tristate "Uncached system RAM"
+ 	help
+--- a/drivers/mtd/devices/Makefile
++++ b/drivers/mtd/devices/Makefile
+@@ -16,3 +16,4 @@ obj-$(CONFIG_MTD_LART)		+= lart.o
+ obj-$(CONFIG_MTD_BLOCK2MTD)	+= block2mtd.o
+ obj-$(CONFIG_MTD_DATAFLASH)	+= mtd_dataflash.o
+ obj-$(CONFIG_MTD_M25P80)	+= m25p80.o
++obj-$(CONFIG_MTD_SPIFLASH)	+= spiflash.o
diff --git a/target/linux/atheros/patches-2.6.28/120-watchdog.patch b/target/linux/atheros/patches-2.6.28/120-watchdog.patch
new file mode 100644
index 0000000000..88c42a2a83
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/120-watchdog.patch
@@ -0,0 +1,25 @@
+--- a/drivers/watchdog/Kconfig
++++ b/drivers/watchdog/Kconfig
+@@ -747,6 +747,12 @@ config TXX9_WDT
+ 	help
+ 	  Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
+ 
++config ATHEROS_WDT
++	tristate "Atheros wisoc Watchdog Timer"
++	depends on ATHEROS
++	help
++	  Hardware driver for the Atheros wisoc Watchdog Timer.
++
+ # PARISC Architecture
+ 
+ # POWERPC Architecture
+--- a/drivers/watchdog/Makefile
++++ b/drivers/watchdog/Makefile
+@@ -106,6 +106,7 @@ obj-$(CONFIG_WDT_RM9K_GPI) += rm9k_wdt.o
+ obj-$(CONFIG_SIBYTE_WDOG) += sb_wdog.o
+ obj-$(CONFIG_AR7_WDT) += ar7_wdt.o
+ obj-$(CONFIG_TXX9_WDT) += txx9wdt.o
++obj-$(CONFIG_ATHEROS_WDT) += ar2315-wtd.o
+ 
+ # PARISC Architecture
+ 
diff --git a/target/linux/atheros/patches-2.6.28/130-ar2313_ethernet.patch b/target/linux/atheros/patches-2.6.28/130-ar2313_ethernet.patch
new file mode 100644
index 0000000000..5c183a431f
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/130-ar2313_ethernet.patch
@@ -0,0 +1,25 @@
+--- a/drivers/net/Kconfig
++++ b/drivers/net/Kconfig
+@@ -359,6 +359,12 @@ config AX88796_93CX6
+ 	help
+ 	  Select this if your platform comes with an external 93CX6 eeprom.
+ 
++config AR2313
++	tristate "AR2313 Ethernet support"
++	depends on NET_ETHERNET && ATHEROS
++	help
++	  Support for the AR231x/531x ethernet controller
++
+ config MACE
+ 	tristate "MACE (Power Mac ethernet) support"
+ 	depends on PPC_PMAC && PPC32
+--- a/drivers/net/Makefile
++++ b/drivers/net/Makefile
+@@ -199,6 +199,7 @@ obj-$(CONFIG_EQUALIZER) += eql.o
+ obj-$(CONFIG_KORINA) += korina.o
+ obj-$(CONFIG_MIPS_JAZZ_SONIC) += jazzsonic.o
+ obj-$(CONFIG_MIPS_AU1X00_ENET) += au1000_eth.o
++obj-$(CONFIG_AR2313) += ar2313/
+ obj-$(CONFIG_MIPS_SIM_NET) += mipsnet.o
+ obj-$(CONFIG_SGI_IOC3_ETH) += ioc3-eth.o
+ obj-$(CONFIG_DECLANCE) += declance.o
diff --git a/target/linux/atheros/patches-2.6.28/135-ar2313_2.6.26.patch b/target/linux/atheros/patches-2.6.28/135-ar2313_2.6.26.patch
new file mode 100644
index 0000000000..a39b46c0b8
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/135-ar2313_2.6.26.patch
@@ -0,0 +1,11 @@
+--- a/drivers/net/ar2313/ar2313.c
++++ b/drivers/net/ar2313/ar2313.c
+@@ -291,7 +291,7 @@ int __init ar2313_probe(struct platform_
+ 	sp->mii_bus.write = mdiobus_write;
+ 	sp->mii_bus.reset = mdiobus_reset;
+ 	sp->mii_bus.name = "ar2313_eth_mii";
+-	sp->mii_bus.id = 0;
++	snprintf(sp->mii_bus.id, MII_BUS_ID_SIZE, "0");
+ 	sp->mii_bus.irq = kmalloc(sizeof(int), GFP_KERNEL);
+ 	*sp->mii_bus.irq = PHY_POLL;
+ 
diff --git a/target/linux/atheros/patches-2.6.28/137-ar2313_2.6.28.patch b/target/linux/atheros/patches-2.6.28/137-ar2313_2.6.28.patch
new file mode 100644
index 0000000000..0f4d732630
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/137-ar2313_2.6.28.patch
@@ -0,0 +1,144 @@
+This patch reflects changes in mdiobus implementation in kernel 2.6.28.
+--- a/drivers/net/ar2313/ar2313.c
++++ b/drivers/net/ar2313/ar2313.c
+@@ -159,10 +159,10 @@ static void rx_tasklet_func(unsigned lon
+ static void rx_tasklet_cleanup(struct net_device *dev);
+ static void ar2313_multicast_list(struct net_device *dev);
+ 
+-static int mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum);
+-static int mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, u16 value);
+-static int mdiobus_reset(struct mii_bus *bus);
+-static int mdiobus_probe (struct net_device *dev);
++static int ar2313_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum);
++static int ar2313_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum, u16 value);
++static int ar2313_mdiobus_reset(struct mii_bus *bus);
++static int ar2313_mdiobus_probe (struct net_device *dev);
+ static void ar2313_adjust_link(struct net_device *dev);
+ 
+ #ifndef ERR
+@@ -286,18 +286,22 @@ int __init ar2313_probe(struct platform_
+ 		   dev->dev_addr[0], dev->dev_addr[1], dev->dev_addr[2],
+ 		   dev->dev_addr[3], dev->dev_addr[4], dev->dev_addr[5], dev->irq);
+ 
+-	sp->mii_bus.priv = dev;
+-	sp->mii_bus.read = mdiobus_read;
+-	sp->mii_bus.write = mdiobus_write;
+-	sp->mii_bus.reset = mdiobus_reset;
+-	sp->mii_bus.name = "ar2313_eth_mii";
+-	snprintf(sp->mii_bus.id, MII_BUS_ID_SIZE, "0");
+-	sp->mii_bus.irq = kmalloc(sizeof(int), GFP_KERNEL);
+-	*sp->mii_bus.irq = PHY_POLL;
++	sp->mii_bus = mdiobus_alloc();
++	if (sp->mii_bus == NULL)
++		return -1;
++
++	sp->mii_bus->priv = dev;
++	sp->mii_bus->read = ar2313_mdiobus_read;
++	sp->mii_bus->write = ar2313_mdiobus_write;
++	sp->mii_bus->reset = ar2313_mdiobus_reset;
++	sp->mii_bus->name = "ar2313_eth_mii";
++	snprintf(sp->mii_bus->id, MII_BUS_ID_SIZE, "0");
++	sp->mii_bus->irq = kmalloc(sizeof(int), GFP_KERNEL);
++	*sp->mii_bus->irq = PHY_POLL;
+ 
+-	mdiobus_register(&sp->mii_bus);
++	mdiobus_register(sp->mii_bus);
+ 
+-	if (mdiobus_probe(dev) != 0) {
++	if (ar2313_mdiobus_probe(dev) != 0) {
+ 		printk(KERN_ERR "ar2313: mdiobus_probe failed");
+ 		rx_tasklet_cleanup(dev);
+ 		ar2313_init_cleanup(dev);
+@@ -432,9 +436,12 @@ static void rx_tasklet_cleanup(struct ne
+ static int __exit ar2313_remove(struct platform_device *pdev)
+ {
+ 	struct net_device *dev = platform_get_drvdata(pdev);
++	struct ar2313_private *sp = netdev_priv(dev);
+ 	rx_tasklet_cleanup(dev);
+ 	ar2313_init_cleanup(dev);
+ 	unregister_netdev(dev);
++	mdiobus_unregister(sp->mii_bus);
++	mdiobus_free(sp->mii_bus);
+ 	kfree(dev);
+ 	return 0;
+ }
+@@ -619,7 +626,7 @@ static void ar2313_check_link(struct net
+ 	struct ar2313_private *sp = netdev_priv(dev);
+ 	u16 phyData;
+ 
+-	phyData = mdiobus_read(&sp->mii_bus, sp->phy, MII_BMSR);
++	phyData = ar2313_mdiobus_read(sp->mii_bus, sp->phy, MII_BMSR);
+ 	if (sp->phyData != phyData) {
+ 		if (phyData & BMSR_LSTATUS) {
+ 			/* link is present, ready link partner ability to deterine
+@@ -628,10 +635,10 @@ static void ar2313_check_link(struct net
+ 			u16 reg;
+ 
+ 			sp->link = 1;
+-			reg = mdiobus_read(&sp->mii_bus, sp->phy, MII_BMCR);
++			reg = ar2313_mdiobus_read(sp->mii_bus, sp->phy, MII_BMCR);
+ 			if (reg & BMCR_ANENABLE) {
+ 				/* auto neg enabled */
+-				reg = mdiobus_read(&sp->mii_bus, sp->phy, MII_LPA);
++				reg = ar2313_mdiobus_read(sp->mii_bus, sp->phy, MII_LPA);
+ 				duplex = (reg & (LPA_100FULL | LPA_10FULL)) ? 1 : 0;
+ 			} else {
+ 				/* no auto neg, just read duplex config */
+@@ -1320,7 +1327,7 @@ static void ar2313_adjust_link(struct ne
+ 	((reg << MII_ADDR_REG_SHIFT) | (phy << MII_ADDR_PHY_SHIFT))
+ 
+ static int
+-mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
++ar2313_mdiobus_read(struct mii_bus *bus, int phy_addr, int regnum)
+ {
+ 	struct net_device *const dev = bus->priv;
+ 	struct ar2313_private *sp = netdev_priv(dev);
+@@ -1332,7 +1339,7 @@ mdiobus_read(struct mii_bus *bus, int ph
+ }
+ 
+ static int
+-mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
++ar2313_mdiobus_write(struct mii_bus *bus, int phy_addr, int regnum,
+              u16 value)
+ {
+ 	struct net_device *const dev = bus->priv;
+@@ -1346,7 +1353,7 @@ mdiobus_write(struct mii_bus *bus, int p
+ 	return 0;
+ }
+ 
+-static int mdiobus_reset(struct mii_bus *bus)
++static int ar2313_mdiobus_reset(struct mii_bus *bus)
+ {
+ 	struct net_device *const dev = bus->priv;
+ 
+@@ -1355,7 +1362,7 @@ static int mdiobus_reset(struct mii_bus 
+ 	return 0;
+ }
+ 
+-static int mdiobus_probe (struct net_device *dev)
++static int ar2313_mdiobus_probe (struct net_device *dev)
+ {
+ 	struct ar2313_private *const sp = netdev_priv(dev);
+ 	struct phy_device *phydev = NULL;
+@@ -1363,8 +1370,8 @@ static int mdiobus_probe (struct net_dev
+ 
+ 	/* find the first (lowest address) PHY on the current MAC's MII bus */
+ 	for (phy_addr = 0; phy_addr < PHY_MAX_ADDR; phy_addr++)
+-		if (sp->mii_bus.phy_map[phy_addr]) {
+-			phydev = sp->mii_bus.phy_map[phy_addr];
++		if (sp->mii_bus->phy_map[phy_addr]) {
++			phydev = sp->mii_bus->phy_map[phy_addr];
+ 			break; /* break out with first one found */
+ 		}
+ 
+--- a/drivers/net/ar2313/ar2313.h
++++ b/drivers/net/ar2313/ar2313.h
+@@ -162,7 +162,7 @@ struct ar2313_private {
+ 	int unloading;
+ 
+ 	struct phy_device *phy_dev;
+-	struct mii_bus mii_bus;
++	struct mii_bus *mii_bus;
+ 	int oldduplex;
+ };
+ 
diff --git a/target/linux/atheros/patches-2.6.28/140-redboot_partition_scan.patch b/target/linux/atheros/patches-2.6.28/140-redboot_partition_scan.patch
new file mode 100644
index 0000000000..289d4eb990
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/140-redboot_partition_scan.patch
@@ -0,0 +1,54 @@
+--- a/drivers/mtd/redboot.c
++++ b/drivers/mtd/redboot.c
+@@ -60,31 +60,32 @@ static int parse_redboot_partitions(stru
+ 	static char nullstring[] = "unallocated";
+ #endif
+ 
++	buf = vmalloc(master->erasesize);
++	if (!buf)
++		return -ENOMEM;
++
++ restart:
+ 	if ( directory < 0 ) {
+ 		offset = master->size + directory * master->erasesize;
+-		while (master->block_isbad && 
++		while (master->block_isbad &&
+ 		       master->block_isbad(master, offset)) {
+ 			if (!offset) {
+ 			nogood:
+ 				printk(KERN_NOTICE "Failed to find a non-bad block to check for RedBoot partition table\n");
++				vfree(buf);
+ 				return -EIO;
+ 			}
+ 			offset -= master->erasesize;
+ 		}
+ 	} else {
+ 		offset = directory * master->erasesize;
+-		while (master->block_isbad && 
++		while (master->block_isbad &&
+ 		       master->block_isbad(master, offset)) {
+ 			offset += master->erasesize;
+ 			if (offset == master->size)
+ 				goto nogood;
+ 		}
+ 	}
+-	buf = vmalloc(master->erasesize);
+-
+-	if (!buf)
+-		return -ENOMEM;
+-
+ 	printk(KERN_NOTICE "Searching for RedBoot partition table in %s at offset 0x%lx\n",
+ 	       master->name, offset);
+ 
+@@ -156,6 +157,11 @@ static int parse_redboot_partitions(stru
+ 	}
+ 	if (i == numslots) {
+ 		/* Didn't find it */
++		if (offset + master->erasesize < master->size) {
++			/* not at the end of the flash yet, maybe next block :) */
++			directory++;
++			goto restart;
++		}
+ 		printk(KERN_NOTICE "No RedBoot partition table detected in %s\n",
+ 		       master->name);
+ 		ret = 0;
diff --git a/target/linux/atheros/patches-2.6.28/200-ar2313_enable_mvswitch.patch b/target/linux/atheros/patches-2.6.28/200-ar2313_enable_mvswitch.patch
new file mode 100644
index 0000000000..710314d7f7
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/200-ar2313_enable_mvswitch.patch
@@ -0,0 +1,70 @@
+--- a/drivers/net/ar2313/ar2313.c
++++ b/drivers/net/ar2313/ar2313.c
+@@ -841,6 +841,7 @@ static void ar2313_load_rx_ring(struct n
+ 	for (i = 0; i < nr_bufs; i++) {
+ 		struct sk_buff *skb;
+ 		ar2313_descr_t *rd;
++		int offset = RX_OFFSET;
+ 
+ 		if (sp->rx_skb[idx]) {
+ #if DEBUG_RX
+@@ -862,7 +863,9 @@ static void ar2313_load_rx_ring(struct n
+ 		 * Make sure IP header starts on a fresh cache line.
+ 		 */
+ 		skb->dev = dev;
+-		skb_reserve(skb, RX_OFFSET);
++		if (sp->phy_dev)
++			offset += sp->phy_dev->pkt_align;
++		skb_reserve(skb, offset);
+ 		sp->rx_skb[idx] = skb;
+ 
+ 		rd = (ar2313_descr_t *) & sp->rx_ring[idx];
+@@ -953,6 +956,7 @@ static int ar2313_rx_int(struct net_devi
+ 			/* alloc new buffer. */
+ 			skb_new = dev_alloc_skb(AR2313_BUFSIZE + RX_OFFSET + 128);
+ 			if (skb_new != NULL) {
++				int offset;
+ 
+ 				skb = sp->rx_skb[idx];
+ 				/* set skb */
+@@ -960,13 +964,17 @@ static int ar2313_rx_int(struct net_devi
+ 						((status >> DMA_RX_LEN_SHIFT) & 0x3fff) - CRC_LEN);
+ 
+ 				dev->stats.rx_bytes += skb->len;
+-				skb->protocol = eth_type_trans(skb, dev);
++
+ 				/* pass the packet to upper layers */
+-				netif_rx(skb);
++				sp->rx(skb);
+ 
+ 				skb_new->dev = dev;
++
+ 				/* 16 bit align */
+-				skb_reserve(skb_new, RX_OFFSET + 32);
++				offset = RX_OFFSET + 32;
++				if (sp->phy_dev)
++					offset += sp->phy_dev->pkt_align;
++				skb_reserve(skb_new, offset);
+ 				/* reset descriptor's curr_addr */
+ 				rxdesc->addr = virt_to_phys(skb_new->data);
+ 
+@@ -1392,6 +1400,8 @@ static int ar2313_mdiobus_probe (struct 
+ 		return PTR_ERR(phydev);
+ 	}
+ 
++	sp->rx = phydev->netif_rx;
++
+ 	/* mask with MAC supported features */
+ 	phydev->supported &= (SUPPORTED_10baseT_Half
+ 		| SUPPORTED_10baseT_Full
+--- a/drivers/net/ar2313/ar2313.h
++++ b/drivers/net/ar2313/ar2313.h
+@@ -107,6 +107,8 @@ typedef struct {
+  */
+ struct ar2313_private {
+ 	struct net_device *dev;
++	int (*rx)(struct sk_buff *skb);
++
+ 	int version;
+ 	u32 mb[2];
+ 
diff --git a/target/linux/atheros/patches-2.6.28/901-get_c0_compare_irq_function.patch b/target/linux/atheros/patches-2.6.28/901-get_c0_compare_irq_function.patch
new file mode 100644
index 0000000000..9b4331cfdc
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/901-get_c0_compare_irq_function.patch
@@ -0,0 +1,43 @@
+--- a/arch/mips/kernel/traps.c
++++ b/arch/mips/kernel/traps.c
+@@ -47,6 +47,7 @@
+ #include <asm/mmu_context.h>
+ #include <asm/types.h>
+ #include <asm/stacktrace.h>
++#include <asm/time.h>
+ 
+ extern void check_wait(void);
+ extern asmlinkage void r4k_wait(void);
+@@ -1514,6 +1515,8 @@ void __cpuinit per_cpu_trap_init(void)
+ 	 */
+ 	if (cpu_has_mips_r2) {
+ 		cp0_compare_irq = (read_c0_intctl() >> 29) & 7;
++		if (get_c0_compare_irq)
++			cp0_compare_irq = get_c0_compare_irq();
+ 		cp0_perfcount_irq = (read_c0_intctl() >> 26) & 7;
+ 		if (cp0_perfcount_irq == cp0_compare_irq)
+ 			cp0_perfcount_irq = -1;
+--- a/arch/mips/include/asm/time.h
++++ b/arch/mips/include/asm/time.h
+@@ -53,6 +53,7 @@ extern int (*perf_irq)(void);
+ #ifdef CONFIG_CEVT_R4K
+ extern int mips_clockevent_init(void);
+ extern unsigned int __weak get_c0_compare_int(void);
++extern unsigned int __weak get_c0_compare_irq(void);
+ #else
+ static inline int mips_clockevent_init(void)
+ {
+--- a/arch/mips/atheros/board.c
++++ b/arch/mips/atheros/board.c
+@@ -265,6 +265,11 @@ void (*board_time_init)(void);
+ void __init plat_time_init(void) {
+     board_time_init();
+ }
++
++unsigned int __cpuinit get_c0_compare_irq(void)
++{
++	return CP0_LEGACY_COMPARE_IRQ;
++}
+ #endif
+ 
+ void __init arch_init_irq(void)
diff --git a/target/linux/atheros/patches-2.6.28/902-mips_clocksource_init_war.patch b/target/linux/atheros/patches-2.6.28/902-mips_clocksource_init_war.patch
new file mode 100644
index 0000000000..03a66ff133
--- /dev/null
+++ b/target/linux/atheros/patches-2.6.28/902-mips_clocksource_init_war.patch
@@ -0,0 +1,56 @@
+--- a/arch/mips/kernel/cevt-r4k.c
++++ b/arch/mips/kernel/cevt-r4k.c
+@@ -15,6 +15,22 @@
+ #include <asm/cevt-r4k.h>
+ 
+ /*
++ * Compare interrupt can be routed and latched outside the core,
++ * so a single execution hazard barrier may not be enough to give
++ * it time to clear as seen in the Cause register.  4 time the
++ * pipeline depth seems reasonably conservative, and empirically
++ * works better in configurations with high CPU/bus clock ratios.
++ */
++
++#define compare_change_hazard() \
++	do { \
++		irq_disable_hazard(); \
++		irq_disable_hazard(); \
++		irq_disable_hazard(); \
++		irq_disable_hazard(); \
++	} while (0)
++
++/*
+  * The SMTC Kernel for the 34K, 1004K, et. al. replaces several
+  * of these routines with SMTC-specific variants.
+  */
+@@ -30,6 +46,7 @@ static int mips_next_event(unsigned long
+ 	cnt = read_c0_count();
+ 	cnt += delta;
+ 	write_c0_compare(cnt);
++	compare_change_hazard();
+ 	res = ((int)(read_c0_count() - cnt) > 0) ? -ETIME : 0;
+ 	return res;
+ }
+@@ -99,22 +116,6 @@ static int c0_compare_int_pending(void)
+ 	return (read_c0_cause() >> cp0_compare_irq) & 0x100;
+ }
+ 
+-/*
+- * Compare interrupt can be routed and latched outside the core,
+- * so a single execution hazard barrier may not be enough to give
+- * it time to clear as seen in the Cause register.  4 time the
+- * pipeline depth seems reasonably conservative, and empirically
+- * works better in configurations with high CPU/bus clock ratios.
+- */
+-
+-#define compare_change_hazard() \
+-	do { \
+-		irq_disable_hazard(); \
+-		irq_disable_hazard(); \
+-		irq_disable_hazard(); \
+-		irq_disable_hazard(); \
+-	} while (0)
+-
+ int c0_compare_int_usable(void)
+ {
+ 	unsigned int delta;