Merge branch 'for-linus' of git://www.atmel.no/~hskinnemoen/linux/kernel/avr32

* 'for-linus' of git://www.atmel.no/~hskinnemoen/linux/kernel/avr32:
  [AVR32] Add missing #include <linux/module.h>
  [AVR32] ssize_t should be long, not int
  [AVR32] Remove last remains of libgcc
  [AVR32] SPI platform code update
  [AVR32] Add PIOE device and reserve SDRAM pins
  [AVR32] Introduce at32_reserve_pin()
  [AVR32] Don't reset PIO state at bootup
  [AVR32] GPIO API implementation
  [AVR32] Use ARRAY_SIZE macro when appropriate
  [AVR32] Implement dma_mapping_error()
  [AVR32] Fix incorrect invalidation of shared cachelines
  [AVR32] ext int fixes
  [AVR32] fix serial port setup on ATSTK1000
  [AVR32] /proc/interrupts display
  Remove a couple final references to obsolete verify_area().

13 files changed, 385 insertions, 219 deletions

diff --git a/arch/avr32/boards/atstk1000/Makefile b/arch/avr32/boards/atstk1000/Makefile
index df949948053..8e0992201bb 100644
--- a/arch/avr32/boards/atstk1000/Makefile
+++ b/arch/avr32/boards/atstk1000/Makefile
@@ -1,2 +1,2 @@
-obj-y				+= setup.o spi.o flash.o
+obj-y				+= setup.o flash.o
 obj-$(CONFIG_BOARD_ATSTK1002)	+= atstk1002.o
diff --git a/arch/avr32/boards/atstk1000/atstk1002.c b/arch/avr32/boards/atstk1000/atstk1002.c
index 32b361f31c2..d47e39f0e97 100644
--- a/arch/avr32/boards/atstk1000/atstk1002.c
+++ b/arch/avr32/boards/atstk1000/atstk1002.c
@@ -8,17 +8,24 @@
  * published by the Free Software Foundation.
  */
 #include <linux/clk.h>
+#include <linux/device.h>
 #include <linux/etherdevice.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/platform_device.h>
 #include <linux/string.h>
 #include <linux/types.h>
+#include <linux/spi/spi.h>
 
 #include <asm/io.h>
 #include <asm/setup.h>
+#include <asm/arch/at32ap7000.h>
 #include <asm/arch/board.h>
 #include <asm/arch/init.h>
+#include <asm/arch/portmux.h>
+
+
+#define	SW2_DEFAULT		/* MMCI and UART_A available */
 
 struct eth_addr {
 	u8 addr[6];
@@ -29,6 +36,16 @@ static struct eth_addr __initdata hw_addr[2];
 static struct eth_platform_data __initdata eth_data[2];
 extern struct lcdc_platform_data atstk1000_fb0_data;
 
+static struct spi_board_info spi_board_info[] __initdata = {
+	{
+		.modalias	= "ltv350qv",
+		.controller_data = (void *)GPIO_PIN_PA(4),
+		.max_speed_hz	= 16000000,
+		.bus_num	= 0,
+		.chip_select	= 1,
+	},
+};
+
 /*
  * The next two functions should go away as the boot loader is
  * supposed to initialize the macb address registers with a valid
@@ -86,23 +103,53 @@ static void __init set_hw_addr(struct platform_device *pdev)
 
 void __init setup_board(void)
 {
-	at32_map_usart(1, 0);	/* /dev/ttyS0 */
-	at32_map_usart(2, 1);	/* /dev/ttyS1 */
-	at32_map_usart(3, 2);	/* /dev/ttyS2 */
+#ifdef	SW2_DEFAULT
+	at32_map_usart(1, 0);	/* USART 1/A: /dev/ttyS0, DB9 */
+#else
+	at32_map_usart(0, 1);	/* USART 0/B: /dev/ttyS1, IRDA */
+#endif
+	/* USART 2/unused: expansion connector */
+	at32_map_usart(3, 2);	/* USART 3/C: /dev/ttyS2, DB9 */
 
 	at32_setup_serial_console(0);
 }
 
 static int __init atstk1002_init(void)
 {
+	/*
+	 * ATSTK1000 uses 32-bit SDRAM interface. Reserve the
+	 * SDRAM-specific pins so that nobody messes with them.
+	 */
+	at32_reserve_pin(GPIO_PIN_PE(0));	/* DATA[16]	*/
+	at32_reserve_pin(GPIO_PIN_PE(1));	/* DATA[17]	*/
+	at32_reserve_pin(GPIO_PIN_PE(2));	/* DATA[18]	*/
+	at32_reserve_pin(GPIO_PIN_PE(3));	/* DATA[19]	*/
+	at32_reserve_pin(GPIO_PIN_PE(4));	/* DATA[20]	*/
+	at32_reserve_pin(GPIO_PIN_PE(5));	/* DATA[21]	*/
+	at32_reserve_pin(GPIO_PIN_PE(6));	/* DATA[22]	*/
+	at32_reserve_pin(GPIO_PIN_PE(7));	/* DATA[23]	*/
+	at32_reserve_pin(GPIO_PIN_PE(8));	/* DATA[24]	*/
+	at32_reserve_pin(GPIO_PIN_PE(9));	/* DATA[25]	*/
+	at32_reserve_pin(GPIO_PIN_PE(10));	/* DATA[26]	*/
+	at32_reserve_pin(GPIO_PIN_PE(11));	/* DATA[27]	*/
+	at32_reserve_pin(GPIO_PIN_PE(12));	/* DATA[28]	*/
+	at32_reserve_pin(GPIO_PIN_PE(13));	/* DATA[29]	*/
+	at32_reserve_pin(GPIO_PIN_PE(14));	/* DATA[30]	*/
+	at32_reserve_pin(GPIO_PIN_PE(15));	/* DATA[31]	*/
+	at32_reserve_pin(GPIO_PIN_PE(26));	/* SDCS		*/
+
 	at32_add_system_devices();
 
+#ifdef	SW2_DEFAULT
 	at32_add_device_usart(0);
+#else
 	at32_add_device_usart(1);
+#endif
 	at32_add_device_usart(2);
 
 	set_hw_addr(at32_add_device_eth(0, &eth_data[0]));
 
+	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
 	at32_add_device_spi(0);
 	at32_add_device_lcdc(0, &atstk1000_fb0_data);
 
diff --git a/arch/avr32/boards/atstk1000/spi.c b/arch/avr32/boards/atstk1000/spi.c
deleted file mode 100644
index 567726c82c6..00000000000
--- a/arch/avr32/boards/atstk1000/spi.c
+++ /dev/null
@@ -1,27 +0,0 @@
-/*
- * ATSTK1000 SPI devices
- *
- * Copyright (C) 2005 Atmel Norway
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-#include <linux/device.h>
-#include <linux/spi/spi.h>
-
-static struct spi_board_info spi_board_info[] __initdata = {
-	{
-		.modalias	= "ltv350qv",
-		.max_speed_hz	= 16000000,
-		.bus_num	= 0,
-		.chip_select	= 1,
-	},
-};
-
-static int board_init_spi(void)
-{
-	spi_register_board_info(spi_board_info, ARRAY_SIZE(spi_board_info));
-	return 0;
-}
-arch_initcall(board_init_spi);
diff --git a/arch/avr32/kernel/cpu.c b/arch/avr32/kernel/cpu.c
index 342452ba204..2e72fd2699d 100644
--- a/arch/avr32/kernel/cpu.c
+++ b/arch/avr32/kernel/cpu.c
@@ -9,6 +9,7 @@
 #include <linux/sysdev.h>
 #include <linux/seq_file.h>
 #include <linux/cpu.h>
+#include <linux/module.h>
 #include <linux/percpu.h>
 #include <linux/param.h>
 #include <linux/errno.h>
diff --git a/arch/avr32/kernel/irq.c b/arch/avr32/kernel/irq.c
index 856f3548e66..fd311248c14 100644
--- a/arch/avr32/kernel/irq.c
+++ b/arch/avr32/kernel/irq.c
@@ -57,6 +57,7 @@ int show_interrupts(struct seq_file *p, void *v)
 		seq_printf(p, "%3d: ", i);
 		for_each_online_cpu(cpu)
 			seq_printf(p, "%10u ", kstat_cpu(cpu).irqs[i]);
+		seq_printf(p, " %8s", irq_desc[i].chip->name ? : "-");
 		seq_printf(p, "  %s", action->name);
 		for (action = action->next; action; action = action->next)
 			seq_printf(p, ", %s", action->name);
diff --git a/arch/avr32/kernel/setup.c b/arch/avr32/kernel/setup.c
index a3421160100..c6734aefb55 100644
--- a/arch/avr32/kernel/setup.c
+++ b/arch/avr32/kernel/setup.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/root_dev.h>
 #include <linux/cpu.h>
+#include <linux/kernel.h>
 
 #include <asm/sections.h>
 #include <asm/processor.h>
@@ -174,8 +175,7 @@ static int __init parse_tag_mem_range(struct tag *tag,
 	 * Copy the data so the bootmem init code doesn't need to care
 	 * about it.
 	 */
-	if (mem_range_next_free >=
-	    (sizeof(mem_range_cache) / sizeof(mem_range_cache[0])))
+	if (mem_range_next_free >= ARRAY_SIZE(mem_range_cache))
 		panic("Physical memory map too complex!\n");
 
 	new = &mem_range_cache[mem_range_next_free++];
diff --git a/arch/avr32/lib/libgcc.h b/arch/avr32/lib/libgcc.h
deleted file mode 100644
index 5a091b5e361..00000000000
--- a/arch/avr32/lib/libgcc.h
+++ /dev/null
@@ -1,33 +0,0 @@
-/* Definitions for various functions 'borrowed' from gcc-3.4.3 */
-
-#define BITS_PER_UNIT	8
-
-typedef		 int QItype	__attribute__ ((mode (QI)));
-typedef unsigned int UQItype	__attribute__ ((mode (QI)));
-typedef		 int HItype	__attribute__ ((mode (HI)));
-typedef unsigned int UHItype	__attribute__ ((mode (HI)));
-typedef 	 int SItype	__attribute__ ((mode (SI)));
-typedef unsigned int USItype	__attribute__ ((mode (SI)));
-typedef		 int DItype	__attribute__ ((mode (DI)));
-typedef unsigned int UDItype	__attribute__ ((mode (DI)));
-typedef 	float SFtype	__attribute__ ((mode (SF)));
-typedef		float DFtype	__attribute__ ((mode (DF)));
-typedef int word_type __attribute__ ((mode (__word__)));
-
-#define W_TYPE_SIZE (4 * BITS_PER_UNIT)
-#define Wtype	SItype
-#define UWtype	USItype
-#define HWtype	SItype
-#define UHWtype	USItype
-#define DWtype	DItype
-#define UDWtype	UDItype
-#define __NW(a,b)	__ ## a ## si ## b
-#define __NDW(a,b)	__ ## a ## di ## b
-
-struct DWstruct {Wtype high, low;};
-
-typedef union
-{
-  struct DWstruct s;
-  DWtype ll;
-} DWunion;
diff --git a/arch/avr32/lib/longlong.h b/arch/avr32/lib/longlong.h
deleted file mode 100644
index cd5e369ac43..00000000000
--- a/arch/avr32/lib/longlong.h
+++ /dev/null
@@ -1,98 +0,0 @@
-/* longlong.h -- definitions for mixed size 32/64 bit arithmetic.
-   Copyright (C) 1991, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000
-   Free Software Foundation, Inc.
-
-   This definition file 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, or (at your option) any later version.
-
-   This definition file 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.  */
-
-/* Borrowed from gcc-3.4.3 */
-
-#define __BITS4 (W_TYPE_SIZE / 4)
-#define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
-#define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
-#define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
-
-#define count_leading_zeros(count, x) ((count) = __builtin_clz(x))
-
-#define __udiv_qrnnd_c(q, r, n1, n0, d) \
-  do {									\
-    UWtype __d1, __d0, __q1, __q0;					\
-    UWtype __r1, __r0, __m;						\
-    __d1 = __ll_highpart (d);						\
-    __d0 = __ll_lowpart (d);						\
-									\
-    __r1 = (n1) % __d1;							\
-    __q1 = (n1) / __d1;							\
-    __m = (UWtype) __q1 * __d0;						\
-    __r1 = __r1 * __ll_B | __ll_highpart (n0);				\
-    if (__r1 < __m)							\
-      {									\
-	__q1--, __r1 += (d);						\
-	if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
-	  if (__r1 < __m)						\
-	    __q1--, __r1 += (d);					\
-      }									\
-    __r1 -= __m;							\
-									\
-    __r0 = __r1 % __d1;							\
-    __q0 = __r1 / __d1;							\
-    __m = (UWtype) __q0 * __d0;						\
-    __r0 = __r0 * __ll_B | __ll_lowpart (n0);				\
-    if (__r0 < __m)							\
-      {									\
-	__q0--, __r0 += (d);						\
-	if (__r0 >= (d))						\
-	  if (__r0 < __m)						\
-	    __q0--, __r0 += (d);					\
-      }									\
-    __r0 -= __m;							\
-									\
-    (q) = (UWtype) __q1 * __ll_B | __q0;				\
-    (r) = __r0;								\
-  } while (0)
-
-#define udiv_qrnnd __udiv_qrnnd_c
-
-#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
-  do {									\
-    UWtype __x;								\
-    __x = (al) - (bl);							\
-    (sh) = (ah) - (bh) - (__x > (al));					\
-    (sl) = __x;								\
-  } while (0)
-
-#define umul_ppmm(w1, w0, u, v)						\
-  do {									\
-    UWtype __x0, __x1, __x2, __x3;					\
-    UHWtype __ul, __vl, __uh, __vh;					\
-									\
-    __ul = __ll_lowpart (u);						\
-    __uh = __ll_highpart (u);						\
-    __vl = __ll_lowpart (v);						\
-    __vh = __ll_highpart (v);						\
-									\
-    __x0 = (UWtype) __ul * __vl;					\
-    __x1 = (UWtype) __ul * __vh;					\
-    __x2 = (UWtype) __uh * __vl;					\
-    __x3 = (UWtype) __uh * __vh;					\
-									\
-    __x1 += __ll_highpart (__x0);/* this can't give carry */		\
-    __x1 += __x2;		/* but this indeed can */		\
-    if (__x1 < __x2)		/* did we get it? */			\
-      __x3 += __ll_B;		/* yes, add it in the proper pos.  */	\
-									\
-    (w1) = __x3 + __ll_highpart (__x1);					\
-    (w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0);		\
-  } while (0)
diff --git a/arch/avr32/mach-at32ap/Makefile b/arch/avr32/mach-at32ap/Makefile
index f62eb691551..b21bea9af8b 100644
--- a/arch/avr32/mach-at32ap/Makefile
+++ b/arch/avr32/mach-at32ap/Makefile
@@ -1,2 +1,2 @@
-obj-y				+= at32ap.o clock.o pio.o intc.o extint.o hsmc.o
+obj-y				+= at32ap.o clock.o intc.o extint.o pio.o hsmc.o
 obj-$(CONFIG_CPU_AT32AP7000)	+= at32ap7000.o
diff --git a/arch/avr32/mach-at32ap/at32ap7000.c b/arch/avr32/mach-at32ap/at32ap7000.c
index 48f4ef38c70..c1e477ec757 100644
--- a/arch/avr32/mach-at32ap/at32ap7000.c
+++ b/arch/avr32/mach-at32ap/at32ap7000.c
@@ -496,9 +496,16 @@ static struct resource pio3_resource[] = {
 DEFINE_DEV(pio, 3);
 DEV_CLK(mck, pio3, pba, 13);
 
+static struct resource pio4_resource[] = {
+	PBMEM(0xffe03800),
+	IRQ(17),
+};
+DEFINE_DEV(pio, 4);
+DEV_CLK(mck, pio4, pba, 14);
+
 void __init at32_add_system_devices(void)
 {
-	system_manager.eim_first_irq = NR_INTERNAL_IRQS;
+	system_manager.eim_first_irq = EIM_IRQ_BASE;
 
 	platform_device_register(&at32_sm_device);
 	platform_device_register(&at32_intc0_device);
@@ -509,6 +516,7 @@ void __init at32_add_system_devices(void)
 	platform_device_register(&pio1_device);
 	platform_device_register(&pio2_device);
 	platform_device_register(&pio3_device);
+	platform_device_register(&pio4_device);
 }
 
 /* --------------------------------------------------------------------
@@ -521,7 +529,7 @@ static struct atmel_uart_data atmel_usart0_data = {
 };
 static struct resource atmel_usart0_resource[] = {
 	PBMEM(0xffe00c00),
-	IRQ(7),
+	IRQ(6),
 };
 DEFINE_DEV_DATA(atmel_usart, 0);
 DEV_CLK(usart, atmel_usart0, pba, 4);
@@ -583,7 +591,7 @@ static inline void configure_usart3_pins(void)
 	select_peripheral(PB(17), PERIPH_B, 0);	/* TXD	*/
 }
 
-static struct platform_device *at32_usarts[4];
+static struct platform_device *__initdata at32_usarts[4];
 
 void __init at32_map_usart(unsigned int hw_id, unsigned int line)
 {
@@ -728,12 +736,19 @@ at32_add_device_eth(unsigned int id, struct eth_platform_data *data)
 /* --------------------------------------------------------------------
  *  SPI
  * -------------------------------------------------------------------- */
-static struct resource spi0_resource[] = {
+static struct resource atmel_spi0_resource[] = {
 	PBMEM(0xffe00000),
 	IRQ(3),
 };
-DEFINE_DEV(spi, 0);
-DEV_CLK(mck, spi0, pba, 0);
+DEFINE_DEV(atmel_spi, 0);
+DEV_CLK(spi_clk, atmel_spi0, pba, 0);
+
+static struct resource atmel_spi1_resource[] = {
+	PBMEM(0xffe00400),
+	IRQ(4),
+};
+DEFINE_DEV(atmel_spi, 1);
+DEV_CLK(spi_clk, atmel_spi1, pba, 1);
 
 struct platform_device *__init at32_add_device_spi(unsigned int id)
 {
@@ -741,13 +756,33 @@ struct platform_device *__init at32_add_device_spi(unsigned int id)
 
 	switch (id) {
 	case 0:
-		pdev = &spi0_device;
+		pdev = &atmel_spi0_device;
 		select_peripheral(PA(0),  PERIPH_A, 0);	/* MISO	 */
 		select_peripheral(PA(1),  PERIPH_A, 0);	/* MOSI	 */
 		select_peripheral(PA(2),  PERIPH_A, 0);	/* SCK	 */
-		select_peripheral(PA(3),  PERIPH_A, 0);	/* NPCS0 */
-		select_peripheral(PA(4),  PERIPH_A, 0);	/* NPCS1 */
-		select_peripheral(PA(5),  PERIPH_A, 0);	/* NPCS2 */
+
+		/* NPCS[2:0] */
+		at32_select_gpio(GPIO_PIN_PA(3),
+				 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+		at32_select_gpio(GPIO_PIN_PA(4),
+				 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+		at32_select_gpio(GPIO_PIN_PA(5),
+				 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+		break;
+
+	case 1:
+		pdev = &atmel_spi1_device;
+		select_peripheral(PB(0),  PERIPH_B, 0);	/* MISO  */
+		select_peripheral(PB(1),  PERIPH_B, 0);	/* MOSI  */
+		select_peripheral(PB(5),  PERIPH_B, 0);	/* SCK   */
+
+		/* NPCS[2:0] */
+		at32_select_gpio(GPIO_PIN_PB(2),
+				 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+		at32_select_gpio(GPIO_PIN_PB(3),
+				 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
+		at32_select_gpio(GPIO_PIN_PB(4),
+				 AT32_GPIOF_OUTPUT | AT32_GPIOF_HIGH);
 		break;
 
 	default:
@@ -860,6 +895,7 @@ struct clk *at32_clock_list[] = {
 	&pio1_mck,
 	&pio2_mck,
 	&pio3_mck,
+	&pio4_mck,
 	&atmel_usart0_usart,
 	&atmel_usart1_usart,
 	&atmel_usart2_usart,
@@ -868,7 +904,8 @@ struct clk *at32_clock_list[] = {
 	&macb0_pclk,
 	&macb1_hclk,
 	&macb1_pclk,
-	&spi0_mck,
+	&atmel_spi0_spi_clk,
+	&atmel_spi1_spi_clk,
 	&lcdc0_hclk,
 	&lcdc0_pixclk,
 };
@@ -880,6 +917,7 @@ void __init at32_portmux_init(void)
 	at32_init_pio(&pio1_device);
 	at32_init_pio(&pio2_device);
 	at32_init_pio(&pio3_device);
+	at32_init_pio(&pio4_device);
 }
 
 void __init at32_clock_init(void)
diff --git a/arch/avr32/mach-at32ap/extint.c b/arch/avr32/mach-at32ap/extint.c
index b59272e81b9..4a60eccfebd 100644
--- a/arch/avr32/mach-at32ap/extint.c
+++ b/arch/avr32/mach-at32ap/extint.c
@@ -55,20 +55,11 @@ static int eim_set_irq_type(unsigned int irq, unsigned int flow_type)
 	unsigned long flags;
 	int ret = 0;
 
+	flow_type &= IRQ_TYPE_SENSE_MASK;
 	if (flow_type == IRQ_TYPE_NONE)
 		flow_type = IRQ_TYPE_LEVEL_LOW;
 
 	desc = &irq_desc[irq];
-	desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
-	desc->status |= flow_type & IRQ_TYPE_SENSE_MASK;
-
-	if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) {
-		desc->status |= IRQ_LEVEL;
-		set_irq_handler(irq, handle_level_irq);
-	} else {
-		set_irq_handler(irq, handle_edge_irq);
-	}
-
 	spin_lock_irqsave(&sm->lock, flags);
 
 	mode = sm_readl(sm, EIM_MODE);
@@ -97,9 +88,16 @@ static int eim_set_irq_type(unsigned int irq, unsigned int flow_type)
 		break;
 	}
 
-	sm_writel(sm, EIM_MODE, mode);
-	sm_writel(sm, EIM_EDGE, edge);
-	sm_writel(sm, EIM_LEVEL, level);
+	if (ret == 0) {
+		sm_writel(sm, EIM_MODE, mode);
+		sm_writel(sm, EIM_EDGE, edge);
+		sm_writel(sm, EIM_LEVEL, level);
+
+		if (flow_type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
+			flow_type |= IRQ_LEVEL;
+		desc->status &= ~(IRQ_TYPE_SENSE_MASK | IRQ_LEVEL);
+		desc->status |= flow_type;
+	}
 
 	spin_unlock_irqrestore(&sm->lock, flags);
 
@@ -122,8 +120,6 @@ static void demux_eim_irq(unsigned int irq, struct irq_desc *desc)
 	unsigned long status, pending;
 	unsigned int i, ext_irq;
 
-	spin_lock(&sm->lock);
-
 	status = sm_readl(sm, EIM_ISR);
 	pending = status & sm_readl(sm, EIM_IMR);
 
@@ -133,10 +129,11 @@ static void demux_eim_irq(unsigned int irq, struct irq_desc *desc)
 
 		ext_irq = i + sm->eim_first_irq;
 		ext_desc = irq_desc + ext_irq;
-		ext_desc->handle_irq(ext_irq, ext_desc);
+		if (ext_desc->status & IRQ_LEVEL)
+			handle_level_irq(ext_irq, ext_desc);
+		else
+			handle_edge_irq(ext_irq, ext_desc);
 	}
-
-	spin_unlock(&sm->lock);
 }
 
 static int __init eim_init(void)
@@ -168,8 +165,9 @@ static int __init eim_init(void)
 	sm->eim_chip = &eim_chip;
 
 	for (i = 0; i < nr_irqs; i++) {
+		/* NOTE the handler we set here is ignored by the demux */
 		set_irq_chip_and_handler(sm->eim_first_irq + i, &eim_chip,
-					 handle_edge_irq);
+					 handle_level_irq);
 		set_irq_chip_data(sm->eim_first_irq + i, sm);
 	}
 
diff --git a/arch/avr32/mach-at32ap/pio.c b/arch/avr32/mach-at32ap/pio.c
index f1280ed8ed6..9ba5654cde1 100644
--- a/arch/avr32/mach-at32ap/pio.c
+++ b/arch/avr32/mach-at32ap/pio.c
@@ -12,7 +12,9 @@
 #include <linux/debugfs.h>
 #include <linux/fs.h>
 #include <linux/platform_device.h>
+#include <linux/irq.h>
 
+#include <asm/gpio.h>
 #include <asm/io.h>
 
 #include <asm/arch/portmux.h>
@@ -26,7 +28,8 @@ struct pio_device {
 	const struct platform_device *pdev;
 	struct clk *clk;
 	u32 pinmux_mask;
-	char name[32];
+	u32 gpio_mask;
+	char name[8];
 };
 
 static struct pio_device pio_dev[MAX_NR_PIO_DEVICES];
@@ -76,6 +79,9 @@ void __init at32_select_periph(unsigned int pin, unsigned int periph,
 	if (!(flags & AT32_GPIOF_PULLUP))
 		pio_writel(pio, PUDR, mask);
 
+	/* gpio_request NOT allowed */
+	set_bit(pin_index, &pio->gpio_mask);
+
 	return;
 
 fail:
@@ -99,19 +105,52 @@ void __init at32_select_gpio(unsigned int pin, unsigned long flags)
 		goto fail;
 	}
 
-	pio_writel(pio, PUER, mask);
-	if (flags & AT32_GPIOF_HIGH)
-		pio_writel(pio, SODR, mask);
-	else
-		pio_writel(pio, CODR, mask);
-	if (flags & AT32_GPIOF_OUTPUT)
+	if (flags & AT32_GPIOF_OUTPUT) {
+		if (flags & AT32_GPIOF_HIGH)
+			pio_writel(pio, SODR, mask);
+		else
+			pio_writel(pio, CODR, mask);
+		pio_writel(pio, PUDR, mask);
 		pio_writel(pio, OER, mask);
-	else
+	} else {
+		if (flags & AT32_GPIOF_PULLUP)
+			pio_writel(pio, PUER, mask);
+		else
+			pio_writel(pio, PUDR, mask);
+		if (flags & AT32_GPIOF_DEGLITCH)
+			pio_writel(pio, IFER, mask);
+		else
+			pio_writel(pio, IFDR, mask);
 		pio_writel(pio, ODR, mask);
+	}
 
 	pio_writel(pio, PER, mask);
-	if (!(flags & AT32_GPIOF_PULLUP))
-		pio_writel(pio, PUDR, mask);
+
+	/* gpio_request now allowed */
+	clear_bit(pin_index, &pio->gpio_mask);
+
+	return;
+
+fail:
+	dump_stack();
+}
+
+/* Reserve a pin, preventing anyone else from changing its configuration. */
+void __init at32_reserve_pin(unsigned int pin)
+{
+	struct pio_device *pio;
+	unsigned int pin_index = pin & 0x1f;
+
+	pio = gpio_to_pio(pin);
+	if (unlikely(!pio)) {
+		printk("pio: invalid pin %u\n", pin);
+		goto fail;
+	}
+
+	if (unlikely(test_and_set_bit(pin_index, &pio->pinmux_mask))) {
+		printk("%s: pin %u is busy\n", pio->name, pin_index);
+		goto fail;
+	}
 
 	return;
 
@@ -119,20 +158,197 @@ fail:
 	dump_stack();
 }
 
+/*--------------------------------------------------------------------------*/
+
+/* GPIO API */
+
+int gpio_request(unsigned int gpio, const char *label)
+{
+	struct pio_device *pio;
+	unsigned int pin;
+
+	pio = gpio_to_pio(gpio);
+	if (!pio)
+		return -ENODEV;
+
+	pin = gpio & 0x1f;
+	if (test_and_set_bit(pin, &pio->gpio_mask))
+		return -EBUSY;
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_request);
+
+void gpio_free(unsigned int gpio)
+{
+	struct pio_device *pio;
+	unsigned int pin;
+
+	pio = gpio_to_pio(gpio);
+	if (!pio) {
+		printk(KERN_ERR
+		       "gpio: attempted to free invalid pin %u\n", gpio);
+		return;
+	}
+
+	pin = gpio & 0x1f;
+	if (!test_and_clear_bit(pin, &pio->gpio_mask))
+		printk(KERN_ERR "gpio: freeing free or non-gpio pin %s-%u\n",
+		       pio->name, pin);
+}
+EXPORT_SYMBOL(gpio_free);
+
+int gpio_direction_input(unsigned int gpio)
+{
+	struct pio_device *pio;
+	unsigned int pin;
+
+	pio = gpio_to_pio(gpio);
+	if (!pio)
+		return -ENODEV;
+
+	pin = gpio & 0x1f;
+	pio_writel(pio, ODR, 1 << pin);
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_direction_input);
+
+int gpio_direction_output(unsigned int gpio)
+{
+	struct pio_device *pio;
+	unsigned int pin;
+
+	pio = gpio_to_pio(gpio);
+	if (!pio)
+		return -ENODEV;
+
+	pin = gpio & 0x1f;
+	pio_writel(pio, OER, 1 << pin);
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_direction_output);
+
+int gpio_get_value(unsigned int gpio)
+{
+	struct pio_device *pio = &pio_dev[gpio >> 5];
+
+	return (pio_readl(pio, PDSR) >> (gpio & 0x1f)) & 1;
+}
+EXPORT_SYMBOL(gpio_get_value);
+
+void gpio_set_value(unsigned int gpio, int value)
+{
+	struct pio_device *pio = &pio_dev[gpio >> 5];
+	u32 mask;
+
+	mask = 1 << (gpio & 0x1f);
+	if (value)
+		pio_writel(pio, SODR, mask);
+	else
+		pio_writel(pio, CODR, mask);
+}
+EXPORT_SYMBOL(gpio_set_value);
+
+/*--------------------------------------------------------------------------*/
+
+/* GPIO IRQ support */
+
+static void gpio_irq_mask(unsigned irq)
+{
+	unsigned		gpio = irq_to_gpio(irq);
+	struct pio_device	*pio = &pio_dev[gpio >> 5];
+
+	pio_writel(pio, IDR, 1 << (gpio & 0x1f));
+}
+
+static void gpio_irq_unmask(unsigned irq)
+{
+	unsigned		gpio = irq_to_gpio(irq);
+	struct pio_device	*pio = &pio_dev[gpio >> 5];
+
+	pio_writel(pio, IER, 1 << (gpio & 0x1f));
+}
+
+static int gpio_irq_type(unsigned irq, unsigned type)
+{
+	if (type != IRQ_TYPE_EDGE_BOTH && type != IRQ_TYPE_NONE)
+		return -EINVAL;
+
+	return 0;
+}
+
+static struct irq_chip gpio_irqchip = {
+	.name		= "gpio",
+	.mask		= gpio_irq_mask,
+	.unmask		= gpio_irq_unmask,
+	.set_type	= gpio_irq_type,
+};
+
+static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
+{
+	struct pio_device	*pio = get_irq_chip_data(irq);
+	unsigned		gpio_irq;
+
+	gpio_irq = (unsigned) get_irq_data(irq);
+	for (;;) {
+		u32		isr;
+		struct irq_desc	*d;
+
+		/* ack pending GPIO interrupts */
+		isr = pio_readl(pio, ISR) & pio_readl(pio, IMR);
+		if (!isr)
+			break;
+		do {
+			int i;
+
+			i = ffs(isr) - 1;
+			isr &= ~(1 << i);
+
+			i += gpio_irq;
+			d = &irq_desc[i];
+
+			d->handle_irq(i, d);
+		} while (isr);
+	}
+}
+
+static void __init
+gpio_irq_setup(struct pio_device *pio, int irq, int gpio_irq)
+{
+	unsigned	i;
+
+	set_irq_chip_data(irq, pio);
+	set_irq_data(irq, (void *) gpio_irq);
+
+	for (i = 0; i < 32; i++, gpio_irq++) {
+		set_irq_chip_data(gpio_irq, pio);
+		set_irq_chip_and_handler(gpio_irq, &gpio_irqchip,
+				handle_simple_irq);
+	}
+
+	set_irq_chained_handler(irq, gpio_irq_handler);
+}
+
+/*--------------------------------------------------------------------------*/
+
 static int __init pio_probe(struct platform_device *pdev)
 {
 	struct pio_device *pio = NULL;
+	int irq = platform_get_irq(pdev, 0);
+	int gpio_irq_base = GPIO_IRQ_BASE + pdev->id * 32;
 
 	BUG_ON(pdev->id >= MAX_NR_PIO_DEVICES);
 	pio = &pio_dev[pdev->id];
 	BUG_ON(!pio->regs);
 
-	/* TODO: Interrupts */
+	gpio_irq_setup(pio, irq, gpio_irq_base);
 
 	platform_set_drvdata(pdev, pio);
 
-	printk(KERN_INFO "%s: Atmel Port Multiplexer at 0x%p (irq %d)\n",
-	       pio->name, pio->regs, platform_get_irq(pdev, 0));
+	printk(KERN_DEBUG "%s: base 0x%p, irq %d chains %d..%d\n",
+	       pio->name, pio->regs, irq, gpio_irq_base, gpio_irq_base + 31);
 
 	return 0;
 }
@@ -148,7 +364,7 @@ static int __init pio_init(void)
 {
 	return platform_driver_register(&pio_driver);
 }
-subsys_initcall(pio_init);
+postcore_initcall(pio_init);
 
 void __init at32_init_pio(struct platform_device *pdev)
 {
@@ -184,6 +400,13 @@ void __init at32_init_pio(struct platform_device *pdev)
 	pio->pdev = pdev;
 	pio->regs = ioremap(regs->start, regs->end - regs->start + 1);
 
-	pio_writel(pio, ODR, ~0UL);
-	pio_writel(pio, PER, ~0UL);
+	/*
+	 * request_gpio() is only valid for pins that have been
+	 * explicitly configured as GPIO and not previously requested
+	 */
+	pio->gpio_mask = ~0UL;
+
+	/* start with irqs disabled and acked */
+	pio_writel(pio, IDR, ~0UL);
+	(void) pio_readl(pio, ISR);
 }
diff --git a/arch/avr32/mm/cache.c b/arch/avr32/mm/cache.c
index 450515b245a..fb13f72e9a0 100644
--- a/arch/avr32/mm/cache.c
+++ b/arch/avr32/mm/cache.c
@@ -22,18 +22,34 @@
 
 void invalidate_dcache_region(void *start, size_t size)
 {
-	unsigned long v, begin, end, linesz;
+	unsigned long v, begin, end, linesz, mask;
+	int flush = 0;
 
 	linesz = boot_cpu_data.dcache.linesz;
+	mask = linesz - 1;
+
+	/* when first and/or last cachelines are shared, flush them
+	 * instead of invalidating ... never discard valid data!
+	 */
+	begin = (unsigned long)start;
+	end = begin + size - 1;
+
+	if (begin & mask) {
+		flush_dcache_line(start);
+		begin += linesz;
+		flush = 1;
+	}
+	if ((end & mask) != mask) {
+		flush_dcache_line((void *)end);
+		end -= linesz;
+		flush = 1;
+	}
 
-	//printk("invalidate dcache: %p + %u\n", start, size);
-
-	/* You asked for it, you got it */
-	begin = (unsigned long)start & ~(linesz - 1);
-	end = ((unsigned long)start + size + linesz - 1) & ~(linesz - 1);
-
-	for (v = begin; v < end; v += linesz)
+	/* remaining cachelines only need invalidation */
+	for (v = begin; v <= end; v += linesz)
 		invalidate_dcache_line((void *)v);
+	if (flush)
+		flush_write_buffer();
 }
 
 void clean_dcache_region(void *start, size_t size)