implement gpiolib drivers for core gpio and ebu attached latches

SVN-Revision: 20418

7 files changed, 495 insertions, 252 deletions

diff --git a/target/linux/ifxmips/config-2.6.30 b/target/linux/ifxmips/config-2.6.30
index e41b288..27e4b80 100644
--- a/target/linux/ifxmips/config-2.6.30
+++ b/target/linux/ifxmips/config-2.6.30
@@ -4,17 +4,17 @@ CONFIG_ADM6996_PHY=y
 # CONFIG_ARCH_HAS_ILOG2_U32 is not set
 # CONFIG_ARCH_HAS_ILOG2_U64 is not set
 CONFIG_ARCH_POPULATES_NODE_MAP=y
+CONFIG_ARCH_REQUIRE_GPIOLIB=y
 # CONFIG_ARCH_SUPPORTS_MSI is not set
 CONFIG_ARCH_SUPPORTS_OPROFILE=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
-CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
 # CONFIG_BCM47XX is not set
 # CONFIG_BINARY_PRINTF is not set
 CONFIG_BITREVERSE=y
 # CONFIG_CAVIUM_OCTEON_REFERENCE_BOARD is not set
 # CONFIG_CAVIUM_OCTEON_SIMULATOR is not set
-CONFIG_CEVT_R4K_LIB=y
 CONFIG_CEVT_R4K=y
+CONFIG_CEVT_R4K_LIB=y
 CONFIG_CMDLINE="console=ttyS0,9600 rootfstype=squashfs,jffs2"
 CONFIG_CPU_BIG_ENDIAN=y
 # CONFIG_CPU_CAVIUM_OCTEON is not set
@@ -23,9 +23,9 @@ CONFIG_CPU_HAS_PREFETCH=y
 CONFIG_CPU_HAS_SYNC=y
 # CONFIG_CPU_LITTLE_ENDIAN is not set
 # CONFIG_CPU_LOONGSON2 is not set
+CONFIG_CPU_MIPS32=y
 # CONFIG_CPU_MIPS32_R1 is not set
 CONFIG_CPU_MIPS32_R2=y
-CONFIG_CPU_MIPS32=y
 # CONFIG_CPU_MIPS64_R1 is not set
 # CONFIG_CPU_MIPS64_R2 is not set
 CONFIG_CPU_MIPSR2=y
@@ -47,21 +47,24 @@ CONFIG_CPU_SUPPORTS_HIGHMEM=y
 # CONFIG_CPU_TX39XX is not set
 # CONFIG_CPU_TX49XX is not set
 # CONFIG_CPU_VR41XX is not set
-CONFIG_CSRC_R4K_LIB=y
 CONFIG_CSRC_R4K=y
+CONFIG_CSRC_R4K_LIB=y
 CONFIG_DECOMPRESS_LZMA=y
 CONFIG_DEVPORT=y
 # CONFIG_DM9000 is not set
 CONFIG_DMA_NEED_PCI_MAP_STATE=y
 CONFIG_DMA_NONCOHERENT=y
 CONFIG_EARLY_PRINTK=y
-CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
 CONFIG_GENERIC_CMOS_UPDATE=y
 CONFIG_GENERIC_FIND_LAST_BIT=y
 CONFIG_GENERIC_FIND_NEXT_BIT=y
 CONFIG_GENERIC_GPIO=y
 CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
+CONFIG_GPIOLIB=y
+CONFIG_GPIO_IFXMIPS_EBU=y
+CONFIG_GPIO_SYSFS=y
 CONFIG_HARDWARE_WATCHPOINTS=y
 CONFIG_HAS_DMA=y
 CONFIG_HAS_IOMEM=y
@@ -75,15 +78,15 @@ CONFIG_HAVE_STD_PC_SERIAL_PORT=y
 # CONFIG_HIGH_RES_TIMERS is not set
 CONFIG_HW_HAS_PCI=y
 CONFIG_HW_RANDOM=y
-# CONFIG_HZ_100 is not set
 CONFIG_HZ=250
+# CONFIG_HZ_100 is not set
 CONFIG_HZ_250=y
+CONFIG_IFXMIPS=y
 CONFIG_IFXMIPS_GPIO_RST_BTN=y
 CONFIG_IFXMIPS_MII0=y
 # CONFIG_IFXMIPS_PROM_ASC0 is not set
 CONFIG_IFXMIPS_PROM_ASC1=y
 CONFIG_IFXMIPS_WDT=y
-CONFIG_IFXMIPS=y
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_IRQ_CPU=y
 CONFIG_KALLSYMS=y
@@ -97,6 +100,7 @@ CONFIG_LEDS_IFXMIPS=y
 # CONFIG_MACH_TX49XX is not set
 # CONFIG_MACH_VR41XX is not set
 # CONFIG_MIKROTIK_RB532 is not set
+CONFIG_MIPS=y
 # CONFIG_MIPS_COBALT is not set
 CONFIG_MIPS_L1_CACHE_SHIFT=5
 # CONFIG_MIPS_MACHINE is not set
@@ -106,10 +110,8 @@ CONFIG_MIPS_MT_DISABLED=y
 # CONFIG_MIPS_MT_SMTC is not set
 # CONFIG_MIPS_SIM is not set
 # CONFIG_MIPS_VPE_LOADER is not set
-CONFIG_MIPS=y
 CONFIG_MTD_CFI_ADV_OPTIONS=y
 CONFIG_MTD_CFI_GEOMETRY=y
-# CONFIG_MTD_CFI_INTELEXT is not set
 CONFIG_MTD_CMDLINE_PARTS=y
 CONFIG_MTD_IFXMIPS=y
 # CONFIG_MTD_MAP_BANK_WIDTH_1 is not set
@@ -126,6 +128,7 @@ CONFIG_PHYLIB=y
 # CONFIG_PNX8550_JBS is not set
 # CONFIG_PNX8550_STB810 is not set
 # CONFIG_PROBE_INITRD_HEADER is not set
+CONFIG_RTL8306_PHY=y
 CONFIG_SCHED_OMIT_FRAME_POINTER=y
 # CONFIG_SCSI_DMA is not set
 # CONFIG_SERIAL_8250 is not set
@@ -143,7 +146,6 @@ CONFIG_SERIAL_IFXMIPS=y
 # CONFIG_SIBYTE_SENTOSA is not set
 # CONFIG_SIBYTE_SWARM is not set
 # CONFIG_SLOW_WORK is not set
-CONFIG_SQUASHFS_SUPPORT_LZMA=y
 CONFIG_SWAP_IO_SPACE=y
 CONFIG_SWCONFIG=y
 CONFIG_SYS_HAS_CPU_MIPS32_R1=y
diff --git a/target/linux/ifxmips/config-2.6.32 b/target/linux/ifxmips/config-2.6.32
new file mode 100644
index 0000000..da094c0
--- /dev/null
+++ b/target/linux/ifxmips/config-2.6.32
@@ -0,0 +1,161 @@
+CONFIG_32BIT=y
+# CONFIG_64BIT is not set
+CONFIG_ADM6996_PHY=y
+# CONFIG_ALCHEMY_GPIO_INDIRECT is not set
+# CONFIG_AR7 is not set
+# CONFIG_ARCH_HAS_ILOG2_U32 is not set
+# CONFIG_ARCH_HAS_ILOG2_U64 is not set
+CONFIG_ARCH_HIBERNATION_POSSIBLE=y
+CONFIG_ARCH_POPULATES_NODE_MAP=y
+# CONFIG_ARCH_SUPPORTS_MSI is not set
+CONFIG_ARCH_SUPPORTS_OPROFILE=y
+CONFIG_ARCH_SUSPEND_POSSIBLE=y
+CONFIG_ARCH_WANT_OPTIONAL_GPIOLIB=y
+# CONFIG_BCM47XX is not set
+# CONFIG_BCM63XX is not set
+CONFIG_BITREVERSE=y
+# CONFIG_CAVIUM_OCTEON_REFERENCE_BOARD is not set
+# CONFIG_CAVIUM_OCTEON_SIMULATOR is not set
+CONFIG_CEVT_R4K=y
+CONFIG_CEVT_R4K_LIB=y
+CONFIG_CFG80211_DEFAULT_PS_VALUE=0
+CONFIG_CMDLINE="console=ttyS0,9600 rootfstype=squashfs,jffs2"
+CONFIG_CPU_BIG_ENDIAN=y
+# CONFIG_CPU_CAVIUM_OCTEON is not set
+CONFIG_CPU_HAS_PREFETCH=y
+CONFIG_CPU_HAS_SYNC=y
+# CONFIG_CPU_LITTLE_ENDIAN is not set
+# CONFIG_CPU_LOONGSON2E is not set
+CONFIG_CPU_MIPS32=y
+# CONFIG_CPU_MIPS32_R1 is not set
+CONFIG_CPU_MIPS32_R2=y
+# CONFIG_CPU_MIPS64_R1 is not set
+# CONFIG_CPU_MIPS64_R2 is not set
+CONFIG_CPU_MIPSR2=y
+# CONFIG_CPU_NEVADA is not set
+# CONFIG_CPU_R10000 is not set
+# CONFIG_CPU_R3000 is not set
+# CONFIG_CPU_R4300 is not set
+# CONFIG_CPU_R4X00 is not set
+# CONFIG_CPU_R5000 is not set
+# CONFIG_CPU_R5432 is not set
+# CONFIG_CPU_R5500 is not set
+# CONFIG_CPU_R6000 is not set
+# CONFIG_CPU_R8000 is not set
+# CONFIG_CPU_RM7000 is not set
+# CONFIG_CPU_RM9000 is not set
+# CONFIG_CPU_SB1 is not set
+CONFIG_CPU_SUPPORTS_32BIT_KERNEL=y
+CONFIG_CPU_SUPPORTS_HIGHMEM=y
+# CONFIG_CPU_TX39XX is not set
+# CONFIG_CPU_TX49XX is not set
+# CONFIG_CPU_VR41XX is not set
+CONFIG_CSRC_R4K=y
+CONFIG_CSRC_R4K_LIB=y
+CONFIG_DECOMPRESS_LZMA=y
+CONFIG_DEVPORT=y
+# CONFIG_DM9000 is not set
+CONFIG_DMA_NEED_PCI_MAP_STATE=y
+CONFIG_DMA_NONCOHERENT=y
+CONFIG_EARLY_PRINTK=y
+# CONFIG_FSNOTIFY is not set
+CONFIG_GENERIC_CLOCKEVENTS=y
+CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
+CONFIG_GENERIC_CMOS_UPDATE=y
+CONFIG_GENERIC_FIND_LAST_BIT=y
+CONFIG_GENERIC_FIND_NEXT_BIT=y
+CONFIG_GENERIC_GPIO=y
+CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ=y
+CONFIG_HARDWARE_WATCHPOINTS=y
+CONFIG_HAS_DMA=y
+CONFIG_HAS_IOMEM=y
+CONFIG_HAS_IOPORT=y
+CONFIG_HAVE_ARCH_KGDB=y
+CONFIG_HAVE_GENERIC_DMA_COHERENT=y
+CONFIG_HAVE_IDE=y
+CONFIG_HAVE_OPROFILE=y
+CONFIG_HAVE_STD_PC_SERIAL_PORT=y
+# CONFIG_HIGH_RES_TIMERS is not set
+CONFIG_HW_HAS_PCI=y
+CONFIG_HW_RANDOM=y
+CONFIG_HZ=250
+# CONFIG_HZ_100 is not set
+CONFIG_HZ_250=y
+CONFIG_IFXMIPS=y
+CONFIG_IFXMIPS_GPIO_RST_BTN=y
+CONFIG_IFXMIPS_MII0=y
+# CONFIG_IFXMIPS_PROM_ASC0 is not set
+CONFIG_IFXMIPS_PROM_ASC1=y
+CONFIG_IFXMIPS_WDT=y
+CONFIG_INITRAMFS_SOURCE=""
+CONFIG_IRQ_CPU=y
+CONFIG_KALLSYMS=y
+CONFIG_LEDS_GPIO=y
+CONFIG_LEDS_IFXMIPS=y
+# CONFIG_MACH_ALCHEMY is not set
+# CONFIG_MACH_DECSTATION is not set
+# CONFIG_MACH_JAZZ is not set
+# CONFIG_MACH_LOONGSON is not set
+# CONFIG_MACH_TX39XX is not set
+# CONFIG_MACH_TX49XX is not set
+# CONFIG_MACH_VR41XX is not set
+# CONFIG_MIKROTIK_RB532 is not set
+CONFIG_MIPS=y
+# CONFIG_MIPS_COBALT is not set
+CONFIG_MIPS_L1_CACHE_SHIFT=5
+# CONFIG_MIPS_MACHINE is not set
+# CONFIG_MIPS_MALTA is not set
+CONFIG_MIPS_MT_DISABLED=y
+# CONFIG_MIPS_MT_SMP is not set
+# CONFIG_MIPS_MT_SMTC is not set
+# CONFIG_MIPS_SIM is not set
+# CONFIG_MIPS_VPE_LOADER is not set
+CONFIG_MTD_CFI_ADV_OPTIONS=y
+CONFIG_MTD_CFI_GEOMETRY=y
+# CONFIG_MTD_CFI_INTELEXT is not set
+CONFIG_MTD_CMDLINE_PARTS=y
+CONFIG_MTD_IFXMIPS=y
+# CONFIG_MTD_MAP_BANK_WIDTH_1 is not set
+# CONFIG_MTD_MAP_BANK_WIDTH_4 is not set
+# CONFIG_NO_IOPORT is not set
+# CONFIG_NXP_STB220 is not set
+# CONFIG_NXP_STB225 is not set
+CONFIG_PAGEFLAGS_EXTENDED=y
+CONFIG_PCI_DOMAINS=y
+CONFIG_PHYLIB=y
+# CONFIG_PMC_MSP is not set
+# CONFIG_PMC_YOSEMITE is not set
+# CONFIG_PNX8550_JBS is not set
+# CONFIG_PNX8550_STB810 is not set
+# CONFIG_PROBE_INITRD_HEADER is not set
+CONFIG_SCHED_OMIT_FRAME_POINTER=y
+# CONFIG_SCSI_DMA is not set
+# CONFIG_SERIAL_8250 is not set
+CONFIG_SERIAL_IFXMIPS=y
+# CONFIG_SGI_IP22 is not set
+# CONFIG_SGI_IP27 is not set
+# CONFIG_SGI_IP28 is not set
+# CONFIG_SGI_IP32 is not set
+# CONFIG_SIBYTE_BIGSUR is not set
+# CONFIG_SIBYTE_CARMEL is not set
+# CONFIG_SIBYTE_CRHINE is not set
+# CONFIG_SIBYTE_CRHONE is not set
+# CONFIG_SIBYTE_LITTLESUR is not set
+# CONFIG_SIBYTE_RHONE is not set
+# CONFIG_SIBYTE_SENTOSA is not set
+# CONFIG_SIBYTE_SWARM is not set
+CONFIG_SWAP_IO_SPACE=y
+CONFIG_SWCONFIG=y
+CONFIG_SYS_HAS_CPU_MIPS32_R1=y
+CONFIG_SYS_HAS_CPU_MIPS32_R2=y
+CONFIG_SYS_HAS_EARLY_PRINTK=y
+CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
+CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
+CONFIG_SYS_SUPPORTS_BIG_ENDIAN=y
+CONFIG_SYS_SUPPORTS_MULTITHREADING=y
+# CONFIG_TC35815 is not set
+CONFIG_TRAD_SIGNALS=y
+# CONFIG_TREE_PREEMPT_RCU is not set
+CONFIG_TREE_RCU=y
+CONFIG_USB_SUPPORT=y
+CONFIG_ZONE_DMA_FLAG=0
diff --git a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
index 3ef5100..1ac00de 100644
--- a/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
+++ b/target/linux/ifxmips/files/arch/mips/ifxmips/gpio.c
@@ -36,6 +36,7 @@
 #include <linux/platform_device.h>
 #include <linux/uaccess.h>
 #include <linux/semaphore.h>
+#include <linux/gpio.h>
 
 #include <net/sock.h>
 
@@ -44,27 +45,13 @@
 #define MAX_PORTS			2
 #define PINS_PER_PORT		16
 
-#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
-
-unsigned int rst_port = 1;
-unsigned int rst_pin = 15;
-static struct timer_list rst_button_timer;
-
-extern struct sock *uevent_sock;
-extern u64 uevent_next_seqnum(void);
-static unsigned long seen;
-static int pressed;
-
-struct event_t {
-	struct work_struct wq;
-	int set;
-	unsigned long jiffies;
-};
-#endif
-
 #define IFXMIPS_GPIO_SANITY		{if (port > MAX_PORTS || pin > PINS_PER_PORT) return -EINVAL; }
 
-int ifxmips_port_reserve_pin(unsigned int port, unsigned int pin)
+#define GPIO_TO_PORT(x) ((x > 15) ? (1) : (0))
+#define GPIO_TO_GPIO(x) ((x > 15) ? (x - 16) : (x))
+
+int
+ifxmips_port_reserve_pin(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	printk(KERN_INFO "%s : call to obseleted function\n", __func__);
@@ -72,7 +59,8 @@ int ifxmips_port_reserve_pin(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_reserve_pin);
 
-int ifxmips_port_free_pin(unsigned int port, unsigned int pin)
+int
+ifxmips_port_free_pin(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	printk(KERN_INFO "%s : call to obseleted function\n", __func__);
@@ -80,7 +68,8 @@ int ifxmips_port_free_pin(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_free_pin);
 
-int ifxmips_port_set_open_drain(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_open_drain(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OD + (port * 0xC)) | (1 << pin),
@@ -89,7 +78,8 @@ int ifxmips_port_set_open_drain(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_open_drain);
 
-int ifxmips_port_clear_open_drain(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_open_drain(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OD + (port * 0xC)) & ~(1 << pin),
@@ -98,7 +88,8 @@ int ifxmips_port_clear_open_drain(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_open_drain);
 
-int ifxmips_port_set_pudsel(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_pudsel(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) | (1 << pin),
@@ -107,7 +98,8 @@ int ifxmips_port_set_pudsel(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_pudsel);
 
-int ifxmips_port_clear_pudsel(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_pudsel(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDSEL + (port * 0xC)) & ~(1 << pin),
@@ -116,7 +108,8 @@ int ifxmips_port_clear_pudsel(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_pudsel);
 
-int ifxmips_port_set_puden(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_puden(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) | (1 << pin),
@@ -125,7 +118,8 @@ int ifxmips_port_set_puden(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_puden);
 
-int ifxmips_port_clear_puden(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_puden(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_PUDEN + (port * 0xC)) & ~(1 << pin),
@@ -134,7 +128,8 @@ int ifxmips_port_clear_puden(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_puden);
 
-int ifxmips_port_set_stoff(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_stoff(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) | (1 << pin),
@@ -143,7 +138,8 @@ int ifxmips_port_set_stoff(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_stoff);
 
-int ifxmips_port_clear_stoff(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_stoff(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_STOFF + (port * 0xC)) & ~(1 << pin),
@@ -152,7 +148,8 @@ int ifxmips_port_clear_stoff(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_stoff);
 
-int ifxmips_port_set_dir_out(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_dir_out(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) | (1 << pin),
@@ -161,7 +158,8 @@ int ifxmips_port_set_dir_out(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_dir_out);
 
-int ifxmips_port_set_dir_in(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_dir_in(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_DIR + (port * 0xC)) & ~(1 << pin),
@@ -170,7 +168,8 @@ int ifxmips_port_set_dir_in(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_dir_in);
 
-int ifxmips_port_set_output(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_output(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) | (1 << pin),
@@ -179,7 +178,8 @@ int ifxmips_port_set_output(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_output);
 
-int ifxmips_port_clear_output(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_output(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_OUT + (port * 0xC)) & ~(1 << pin),
@@ -188,7 +188,8 @@ int ifxmips_port_clear_output(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_output);
 
-int ifxmips_port_get_input(unsigned int port, unsigned int pin)
+int
+ifxmips_port_get_input(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	if (ifxmips_r32(IFXMIPS_GPIO_P0_IN + (port * 0xC)) & (1 << pin))
@@ -198,7 +199,8 @@ int ifxmips_port_get_input(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_get_input);
 
-int ifxmips_port_set_altsel0(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_altsel0(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) | (1 << pin),
@@ -207,7 +209,8 @@ int ifxmips_port_set_altsel0(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_altsel0);
 
-int ifxmips_port_clear_altsel0(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_altsel0(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL0 + (port * 0xC)) & ~(1 << pin),
@@ -216,7 +219,8 @@ int ifxmips_port_clear_altsel0(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_altsel0);
 
-int ifxmips_port_set_altsel1(unsigned int port, unsigned int pin)
+int
+ifxmips_port_set_altsel1(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) | (1 << pin),
@@ -225,7 +229,8 @@ int ifxmips_port_set_altsel1(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_set_altsel1);
 
-int ifxmips_port_clear_altsel1(unsigned int port, unsigned int pin)
+int
+ifxmips_port_clear_altsel1(unsigned int port, unsigned int pin)
 {
 	IFXMIPS_GPIO_SANITY;
 	ifxmips_w32(ifxmips_r32(IFXMIPS_GPIO_P0_ALTSEL1 + (port * 0xC)) & ~(1 << pin),
@@ -234,105 +239,85 @@ int ifxmips_port_clear_altsel1(unsigned int port, unsigned int pin)
 }
 EXPORT_SYMBOL(ifxmips_port_clear_altsel1);
 
-#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
-static inline void add_msg(struct sk_buff *skb, char *msg)
+static void
+ifxmips_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
-	char *scratch;
-	scratch = skb_put(skb, strlen(msg) + 1);
-	sprintf(scratch, msg);
+	int port = GPIO_TO_PORT(offset);
+	int gpio = GPIO_TO_GPIO(offset);
+	if(value)
+		ifxmips_port_set_output(port, gpio);
+	else
+		ifxmips_port_clear_output(port, gpio);
 }
 
-static void hotplug_button(struct work_struct *wq)
+static int
+ifxmips_gpio_get(struct gpio_chip *chip, unsigned int offset)
 {
-	struct sk_buff *skb;
-	struct event_t *event;
-	size_t len;
-	char *scratch, *s;
-	char buf[128];
-
-	event = container_of(wq, struct event_t, wq);
-	if (!uevent_sock)
-		goto done;
-
-	s = event->set ? "pressed" : "released";
-	len = strlen(s) + 2;
-	skb = alloc_skb(len + 2048, GFP_KERNEL);
-	if (!skb)
-		goto done;
-
-	scratch = skb_put(skb, len);
-	sprintf(scratch, "%s@", s);
-	add_msg(skb, "HOME=/");
-	add_msg(skb, "PATH=/sbin:/bin:/usr/sbin:/usr/bin");
-	add_msg(skb, "SUBSYSTEM=button");
-	add_msg(skb, "BUTTON=reset");
-	add_msg(skb, (event->set ? "ACTION=pressed" : "ACTION=released"));
-	sprintf(buf, "SEEN=%ld", (event->jiffies - seen)/HZ);
-	add_msg(skb, buf);
-	snprintf(buf, 128, "SEQNUM=%llu", uevent_next_seqnum());
-	add_msg(skb, buf);
-
-	NETLINK_CB(skb).dst_group = 1;
-	netlink_broadcast(uevent_sock, skb, 0, 1, GFP_KERNEL);
-done:
-	kfree(event);
+	int port = GPIO_TO_PORT(offset);
+	int gpio = GPIO_TO_GPIO(offset);
+	return ifxmips_port_get_input(port, gpio);
 }
 
-static void reset_button_poll(unsigned long unused)
+static int
+ifxmips_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
 {
-	struct event_t *event;
-
-	rst_button_timer.expires = jiffies + (HZ / 4);
-	add_timer(&rst_button_timer);
-
-	if (pressed != ifxmips_port_get_input(rst_port, rst_pin)) {
-		if (pressed)
-			pressed = 0;
-		else
-			pressed = 1;
-		event = kzalloc(sizeof(struct event_t), GFP_ATOMIC);
-		if (!event) {
-			printk(KERN_INFO "Could not alloc hotplug event\n");
-			return;
-		}
-		event->set = pressed;
-		event->jiffies = jiffies;
-		INIT_WORK(&event->wq, (void *)(void *)hotplug_button);
-		schedule_work(&event->wq);
-		seen = jiffies;
-	}
+	int port = GPIO_TO_PORT(offset);
+	int gpio = GPIO_TO_GPIO(offset);
+	ifxmips_port_set_open_drain(port, gpio);
+	ifxmips_port_clear_altsel0(port, gpio);
+	ifxmips_port_clear_altsel1(port, gpio);
+	ifxmips_port_set_dir_in(port, gpio);
+	return 0;
 }
-#endif
 
-static int ifxmips_gpio_probe(struct platform_device *dev)
+static int
+ifxmips_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, int value)
 {
-	int retval = 0;
-
-#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
-	rst_port = dev->resource[0].start;
-	rst_pin = dev->resource[0].end;
-	ifxmips_port_set_open_drain(rst_port, rst_pin);
-	ifxmips_port_clear_altsel0(rst_port, rst_pin);
-	ifxmips_port_clear_altsel1(rst_port, rst_pin);
-	ifxmips_port_set_dir_in(rst_port, rst_pin);
-	seen = jiffies;
-	init_timer(&rst_button_timer);
-	rst_button_timer.function = reset_button_poll;
-	rst_button_timer.expires = jiffies + HZ;
-	add_timer(&rst_button_timer);
-#endif
-	return retval;
+	int port = GPIO_TO_PORT(offset);
+	int gpio = GPIO_TO_GPIO(offset);
+	ifxmips_port_clear_open_drain(port, gpio);
+	ifxmips_port_clear_altsel0(port, gpio);
+	ifxmips_port_clear_altsel1(port, gpio);
+	ifxmips_port_set_dir_out(port, gpio);
+	ifxmips_gpio_set(chip, offset, value);
+	return 0;
+}
+
+int
+gpio_to_irq(unsigned int gpio)
+{
+	return -EINVAL;
+}
+EXPORT_SYMBOL(gpio_to_irq);
+
+struct gpio_chip
+ifxmips_gpio_chip =
+{
+	.label = "ifxmips-gpio",
+	.direction_input = ifxmips_gpio_direction_input,
+	.direction_output = ifxmips_gpio_direction_output,
+	.get = ifxmips_gpio_get,
+	.set = ifxmips_gpio_set,
+	.base = 0,
+	.ngpio = 32,
+};
+
+static int
+ifxmips_gpio_probe(struct platform_device *dev)
+{
+	gpiochip_add(&ifxmips_gpio_chip);
+	return 0;
 }
 
-static int ifxmips_gpio_remove(struct platform_device *pdev)
+static int
+ifxmips_gpio_remove(struct platform_device *pdev)
 {
-#ifdef CONFIG_IFXMIPS_GPIO_RST_BTN
-	del_timer_sync(&rst_button_timer);
-#endif
+	gpiochip_remove(&ifxmips_gpio_chip);
 	return 0;
 }
 
-static struct platform_driver ifxmips_gpio_driver = {
+static struct platform_driver
+ifxmips_gpio_driver = {
 	.probe = ifxmips_gpio_probe,
 	.remove = ifxmips_gpio_remove,
 	.driver = {
@@ -341,7 +326,8 @@ static struct platform_driver ifxmips_gpio_driver = {
 	},
 };
 
-int __init ifxmips_gpio_init(void)
+int __init
+ifxmips_gpio_init(void)
 {
 	int ret = platform_driver_register(&ifxmips_gpio_driver);
 	if (ret)
@@ -349,7 +335,8 @@ int __init ifxmips_gpio_init(void)
 	return ret;
 }
 
-void __exit ifxmips_gpio_exit(void)
+void __exit
+ifxmips_gpio_exit(void)
 {
 	platform_driver_unregister(&ifxmips_gpio_driver);
 }
diff --git a/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/gpio.h b/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/gpio.h
deleted file mode 100644
index 4176bfd..0000000
--- a/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/gpio.h
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- *   include/asm-mips/mach-ifxmips/gpio.h
- *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program; if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
- *
- *   Copyright (C) 2007 John Crispin <blogic@openwrt.org>
- *
- */
-
-#ifndef _IFXMIPS_GPIO_H_
-#define _IFXMIPS_GPIO_H_
-
-#include <ifxmips.h>
-#include <ifxmips_gpio.h>
-
-#define GPIO_TO_PORT(x) ((x > 15) ? (1) : (0))
-#define GPIO_TO_GPIO(x) ((x > 15) ? (x-16) : (x))
-
-static inline int gpio_direction_input(unsigned gpio)
-{
-	ifxmips_port_set_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	ifxmips_port_set_dir_in(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	return 0;
-}
-
-static inline int gpio_direction_output(unsigned gpio, int value)
-{
-	ifxmips_port_clear_open_drain(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	ifxmips_port_clear_altsel0(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	ifxmips_port_clear_altsel1(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	ifxmips_port_set_dir_out(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	return 0;
-}
-
-static inline int gpio_get_value(unsigned gpio)
-{
-	ifxmips_port_get_input(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	return 0;
-}
-
-static inline void gpio_set_value(unsigned gpio, int value)
-{
-	if (value)
-		ifxmips_port_set_output(GPIO_TO_PORT(gpio), GPIO_TO_GPIO(gpio));
-	else
-		ifxmips_port_clear_output(GPIO_TO_PORT(gpio),
-			GPIO_TO_GPIO(gpio));
-}
-
-static inline int gpio_request(unsigned gpio, const char *label)
-{
-	return 0;
-}
-
-static inline void gpio_free(unsigned gpio)
-{
-}
-
-static inline int gpio_to_irq(unsigned gpio)
-{
-	return 0;
-}
-
-static inline int irq_to_gpio(unsigned irq)
-{
-	return 0;
-}
-
-static inline int gpio_cansleep(unsigned gpio)
-{
-	return 0;
-}
-
-static inline int gpio_get_value_cansleep(unsigned gpio)
-{
-	might_sleep();
-	return gpio_get_value(gpio);
-}
-
-static inline void gpio_set_value_cansleep(unsigned gpio, int value)
-{
-	might_sleep();
-	gpio_set_value(gpio, value);
-}
-
-static inline int gpio_is_valid(int number)
-{
-	return ((unsigned)number) < 32;
-}
-
-#endif
diff --git a/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/ifxmips_irq.h b/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/ifxmips_irq.h
index f3cb99c..e6ca59b 100644
--- a/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/ifxmips_irq.h
+++ b/target/linux/ifxmips/files/arch/mips/include/asm/mach-ifxmips/ifxmips_irq.h
@@ -66,8 +66,11 @@
 
 #define IFXMIPS_PPE_MBOX_INT		(INT_NUM_IM2_IRL0 + 24)
 
-#define IFXMIPS_USB_INT			(INT_NUM_IM4_IRL0 + 22)
-#define IFXMIPS_USB_OC_INT		(INT_NUM_IM4_IRL0 + 23)
+#define INT_NUM_IM4_IRL14			(INT_NUM_IM4_IRL0 + 14)
+#define INT_NUM_IM4_IRL18			(INT_NUM_IM4_IRL0 + 18)
+#define INT_NUM_IM4_IRL19			(INT_NUM_IM4_IRL0 + 19)
+#define IFXMIPS_USB_INT				(INT_NUM_IM4_IRL0 + 22)
+#define IFXMIPS_USB_OC_INT			(INT_NUM_IM4_IRL0 + 23)
 
 
 extern void ifxmips_mask_and_ack_irq(unsigned int irq_nr);
diff --git a/target/linux/ifxmips/patches-2.6.30/100-board.patch b/target/linux/ifxmips/patches-2.6.30/100-board.patch
index 1627269..5e7530e 100644
--- a/target/linux/ifxmips/patches-2.6.30/100-board.patch
+++ b/target/linux/ifxmips/patches-2.6.30/100-board.patch
@@ -1,8 +1,8 @@
-Index: linux-2.6.30.5/arch/mips/Kconfig
+Index: linux-2.6.30.10/arch/mips/Kconfig
 ===================================================================
---- linux-2.6.30.5.orig/arch/mips/Kconfig	2009-09-02 22:12:48.000000000 +0200
-+++ linux-2.6.30.5/arch/mips/Kconfig	2009-09-03 01:18:31.000000000 +0200
-@@ -79,6 +79,24 @@
+--- linux-2.6.30.10.orig/arch/mips/Kconfig	2010-03-24 15:32:02.000000000 +0100
++++ linux-2.6.30.10/arch/mips/Kconfig	2010-03-24 21:56:29.000000000 +0100
+@@ -79,6 +79,23 @@
  	select SYS_SUPPORTS_64BIT_KERNEL
  	select SYS_SUPPORTS_LITTLE_ENDIAN
  
@@ -20,14 +20,13 @@ Index: linux-2.6.30.5/arch/mips/Kconfig
 +	select SYS_SUPPORTS_MULTITHREADING
 +	select SYS_HAS_EARLY_PRINTK
 +	select HW_HAS_PCI
-+	select GENERIC_GPIO
-+	select ARCH_WANT_OPTIONAL_GPIOLIB
++	select ARCH_REQUIRE_GPIOLIB
 +	select SWAP_IO_SPACE
 +
  config MACH_DECSTATION
  	bool "DECstations"
  	select BOOT_ELF32
-@@ -643,6 +661,7 @@
+@@ -643,6 +660,7 @@
  source "arch/mips/txx9/Kconfig"
  source "arch/mips/vr41xx/Kconfig"
  source "arch/mips/cavium-octeon/Kconfig"
@@ -35,10 +34,10 @@ Index: linux-2.6.30.5/arch/mips/Kconfig
  
  endmenu
  
-Index: linux-2.6.30.5/arch/mips/Makefile
+Index: linux-2.6.30.10/arch/mips/Makefile
 ===================================================================
---- linux-2.6.30.5.orig/arch/mips/Makefile	2009-09-02 22:12:48.000000000 +0200
-+++ linux-2.6.30.5/arch/mips/Makefile	2009-09-02 22:12:53.000000000 +0200
+--- linux-2.6.30.10.orig/arch/mips/Makefile	2010-03-24 15:32:02.000000000 +0100
++++ linux-2.6.30.10/arch/mips/Makefile	2010-03-24 15:32:04.000000000 +0100
 @@ -290,6 +290,13 @@
  load-$(CONFIG_MIPS_COBALT)	+= 0xffffffff80080000
  
@@ -53,10 +52,10 @@ Index: linux-2.6.30.5/arch/mips/Makefile
  # DECstation family
  #
  core-$(CONFIG_MACH_DECSTATION)	+= arch/mips/dec/
-Index: linux-2.6.30.5/arch/mips/include/asm/bootinfo.h
+Index: linux-2.6.30.10/arch/mips/include/asm/bootinfo.h
 ===================================================================
---- linux-2.6.30.5.orig/arch/mips/include/asm/bootinfo.h	2009-09-02 22:12:48.000000000 +0200
-+++ linux-2.6.30.5/arch/mips/include/asm/bootinfo.h	2009-09-02 22:13:05.000000000 +0200
+--- linux-2.6.30.10.orig/arch/mips/include/asm/bootinfo.h	2009-12-04 07:00:07.000000000 +0100
++++ linux-2.6.30.10/arch/mips/include/asm/bootinfo.h	2010-03-24 15:32:04.000000000 +0100
 @@ -57,6 +57,8 @@
  #define	MACH_MIKROTIK_RB532	0	/* Mikrotik RouterBoard 532 	*/
  #define MACH_MIKROTIK_RB532A	1	/* Mikrotik RouterBoard 532A 	*/
diff --git a/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch b/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch
new file mode 100644
index 0000000..01e428a
--- /dev/null
+++ b/target/linux/ifxmips/patches-2.6.30/600-ebu-gpio.patch
@@ -0,0 +1,196 @@
+Index: linux-2.6.30.10/drivers/gpio/Kconfig
+===================================================================
+--- linux-2.6.30.10.orig/drivers/gpio/Kconfig	2010-03-24 21:55:56.000000000 +0100
++++ linux-2.6.30.10/drivers/gpio/Kconfig	2010-03-24 21:56:36.000000000 +0100
+@@ -176,4 +176,12 @@
+ 	  SPI driver for Microchip MCP23S08 I/O expander.  This provides
+ 	  a GPIO interface supporting inputs and outputs.
+ 
++comment "EBU GPIO expanders:"
++
++config GPIO_IFXMIPS_EBU
++	boolean "IFXMIPS EBU attached I/O expander"
++	depends on IFXMIPS
++	help
++	  This driver allows you to drive latches attached to the SoCc External Bus Unit
++
+ endif
+Index: linux-2.6.30.10/drivers/gpio/Makefile
+===================================================================
+--- linux-2.6.30.10.orig/drivers/gpio/Makefile	2010-03-24 21:55:56.000000000 +0100
++++ linux-2.6.30.10/drivers/gpio/Makefile	2010-03-24 21:56:36.000000000 +0100
+@@ -12,3 +12,4 @@
+ obj-$(CONFIG_GPIO_TWL4030)	+= twl4030-gpio.o
+ obj-$(CONFIG_GPIO_XILINX)	+= xilinx_gpio.o
+ obj-$(CONFIG_GPIO_BT8XX)	+= bt8xxgpio.o
++obj-$(CONFIG_GPIO_IFXMIPS_EBU)	+= ifxmips_ebu_gpio.o
+Index: linux-2.6.30.10/arch/mips/ifxmips/board.c
+===================================================================
+--- linux-2.6.30.10.orig/arch/mips/ifxmips/board.c	2010-03-25 10:43:06.000000000 +0100
++++ linux-2.6.30.10/arch/mips/ifxmips/board.c	2010-03-25 12:40:54.000000000 +0100
+@@ -111,6 +111,11 @@
+ 	.name = "ifxmips_wdt",
+ };
+ 
++static struct platform_device ifxmips_ebu = {
++	.id = 0,
++	.name = "ifxmips_ebu",
++};
++
+ static struct resource ifxmips_mtd_resource = {
+ 	.start  = IFXMIPS_FLASH_START,
+ 	.end    = IFXMIPS_FLASH_START + IFXMIPS_FLASH_MAX - 1,
+@@ -145,10 +150,18 @@
+ static struct gpio_led arv452_gpio_leds[] = {
+ 	{ .name = "ifx:blue:power", .gpio = 3, .active_low = 1, },
+ 	{ .name = "ifx:blue:adsl", .gpio = 4, .active_low = 1, },
+-	{ .name = "ifx:pink:internet", .gpio = 5, .active_low = 1, },
++	{ .name = "ifx:blue:internet", .gpio = 5, .active_low = 1, },
+ 	{ .name = "ifx:red:power", .gpio = 6, .active_low = 1, },
+ 	{ .name = "ifx:yello:wps", .gpio = 7, .active_low = 1, },
+ 	{ .name = "ifx:red:wps", .gpio = 9, .active_low = 1, },
++	{ .name = "ifx:blue:voip", .gpio = 32, .active_low = 1, },
++	{ .name = "ifx:blue:fxs1", .gpio = 33, .active_low = 1, },
++	{ .name = "ifx:blue:fxs2", .gpio = 34, .active_low = 1, },
++	{ .name = "ifx:blue:fxo", .gpio = 35, .active_low = 1, },
++	{ .name = "ifx:blue:voice", .gpio = 36, .active_low = 1, },
++	{ .name = "ifx:blue:usb", .gpio = 37, .active_low = 1, },
++	{ .name = "ifx:blue:wlan", .gpio = 38, .active_low = 1, },
++	{ .name = "ifx:red:internet", .gpio = 41, .active_low = 1, },
+ };
+ 
+ static struct gpio_led_platform_data ifxmips_gpio_led_data;
+@@ -205,6 +218,7 @@
+ struct platform_device *arv452_devs[] = {
+ 	&ifxmips_gpio, &ifxmips_mii, &ifxmips_mtd,
+ 	&ifxmips_gpio_dev, &ifxmips_wdt, &dwc_usb,
++	&ifxmips_ebu,
+ #ifdef CONFIG_LEDS_GPIO
+ 	&ifxmips_gpio_leds,
+ #endif
+Index: linux-2.6.30.10/drivers/gpio/ifxmips_ebu_gpio.c
+===================================================================
+--- /dev/null	1970-01-01 00:00:00.000000000 +0000
++++ linux-2.6.30.10/drivers/gpio/ifxmips_ebu_gpio.c	2010-03-25 12:47:07.000000000 +0100
+@@ -0,0 +1,121 @@
++/*
++ *   This program is free software; you can redistribute it and/or modify
++ *   it under the terms of the GNU General Public License as published by
++ *   the Free Software Foundation; either version 2 of the License, or
++ *   (at your option) any later version.
++ *
++ *   This program is distributed in the hope that it will be useful,
++ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
++ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
++ *   GNU General Public License for more details.
++ *
++ *   You should have received a copy of the GNU General Public License
++ *   along with this program; if not, write to the Free Software
++ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
++ *
++ *   Copyright (C) 2010 John Crispin <blogic@openwrt.org>
++ */
++
++#include <linux/init.h>
++#include <linux/platform_device.h>
++#include <linux/mutex.h>
++#include <linux/gpio.h>
++#include <ifxmips.h>
++
++#define IFXMIPS_EBU_START	0x14000000
++#define IFXMIPS_EBU_MAX		0x00001000
++#define IFXMIPS_EBU_BUSCON	0x1e7ff
++#define IFXMIPS_EBU_WP		0x80000000
++
++static int shadow = (1 << 10) | (1 << 8);
++static void __iomem *virt;
++
++static int
++ifxmips_ebu_direction_input(struct gpio_chip *chip, unsigned offset)
++{
++	return -EINVAL;
++}
++
++static int
++ifxmips_ebu_direction_output(struct gpio_chip *chip, unsigned offset, int value)
++{
++	return 0;
++}
++
++static int
++ifxmips_ebu_get(struct gpio_chip *chip, unsigned offset)
++{
++	return -EINVAL;
++}
++
++static void
++ifxmips_ebu_set(struct gpio_chip *chip, unsigned offset, int value)
++{
++	if(value)
++		shadow |= (1 << offset);
++	else
++		shadow &= ~(1 << offset);
++	ifxmips_w32(IFXMIPS_EBU_BUSCON, IFXMIPS_EBU_BUSCON1);
++	*((__u16*)virt) = shadow;
++	ifxmips_w32(IFXMIPS_EBU_BUSCON | IFXMIPS_EBU_WP, IFXMIPS_EBU_BUSCON1);
++}
++
++static struct gpio_chip
++ifxmips_ebu_chip =
++{
++	.label = "ifxmips_ebu",
++	.direction_input = ifxmips_ebu_direction_input,
++	.direction_output = ifxmips_ebu_direction_output,
++	.set = ifxmips_ebu_set,
++	.get = ifxmips_ebu_get,
++	.base = 32,
++	.ngpio = 16,
++	.can_sleep = 1,
++	.owner = THIS_MODULE,
++};
++
++static int __devinit
++ifxmips_ebu_probe(struct platform_device *dev)
++{
++	ifxmips_w32(IFXMIPS_EBU_START | 0x1, IFXMIPS_EBU_ADDRSEL1);
++	ifxmips_w32(IFXMIPS_EBU_BUSCON | IFXMIPS_EBU_WP, IFXMIPS_EBU_BUSCON1);
++	virt = ioremap_nocache(IFXMIPS_EBU_START, IFXMIPS_EBU_MAX);
++	if(gpiochip_add(&ifxmips_ebu_chip))
++		return -EINVAL;
++	return 0;
++}
++
++static int
++ifxmips_ebu_remove(struct platform_device *dev)
++{
++	return gpiochip_remove(&ifxmips_ebu_chip);
++}
++
++static struct platform_driver
++ifxmips_ebu_driver = {
++	.probe = ifxmips_ebu_probe,
++	.remove = ifxmips_ebu_remove,
++	.driver = {
++		.name = "ifxmips_ebu",
++		.owner = THIS_MODULE,
++	},
++};
++
++static int __init
++ifxmips_ebu_init(void)
++{
++	return platform_driver_register(&ifxmips_ebu_driver);
++}
++
++static void __exit
++ifxmips_ebu_exit(void)
++{
++	platform_driver_unregister(&ifxmips_ebu_driver);
++}
++
++module_init(ifxmips_ebu_init);
++module_exit(ifxmips_ebu_exit);
++
++MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
++MODULE_LICENSE("GPL v2");
++MODULE_DESCRIPTION("ifxmips - EBU Latch GPIO-Expander");