[ARM] 3867/1: AT91 GPIO update
This patch makes the AT91 gpio.c support processor-generic (AT91RM9200
and AT91SAM9xxx). The GPIO controllers supported by a particular AT91
processor are defined in the processor-specific file and are registered
with gpio.c at startup.
Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-at91rm9200/at91rm9200.c b/arch/arm/mach-at91rm9200/at91rm9200.c
index ae04cbd..c32d0c9 100644
--- a/arch/arm/mach-at91rm9200/at91rm9200.c
+++ b/arch/arm/mach-at91rm9200/at91rm9200.c
@@ -243,11 +243,34 @@
clk_register(&pck3);
}
+/* --------------------------------------------------------------------
+ * GPIO
+ * -------------------------------------------------------------------- */
+
+static struct at91_gpio_bank at91rm9200_gpio[] = {
+ {
+ .id = AT91RM9200_ID_PIOA,
+ .offset = AT91_PIOA,
+ .clock = &pioA_clk,
+ }, {
+ .id = AT91RM9200_ID_PIOB,
+ .offset = AT91_PIOB,
+ .clock = &pioB_clk,
+ }, {
+ .id = AT91RM9200_ID_PIOC,
+ .offset = AT91_PIOC,
+ .clock = &pioC_clk,
+ }, {
+ .id = AT91RM9200_ID_PIOD,
+ .offset = AT91_PIOD,
+ .clock = &pioD_clk,
+ }
+};
/* --------------------------------------------------------------------
* AT91RM9200 processor initialization
* -------------------------------------------------------------------- */
-void __init at91rm9200_initialize(unsigned long main_clock)
+void __init at91rm9200_initialize(unsigned long main_clock, unsigned short banks)
{
/* Map peripherals */
iotable_init(at91rm9200_io_desc, ARRAY_SIZE(at91rm9200_io_desc));
@@ -257,8 +280,16 @@
/* Register the processor-specific clocks */
at91rm9200_register_clocks();
+
+ /* Initialize GPIO subsystem */
+ at91_gpio_init(at91rm9200_gpio, banks);
}
+
+/* --------------------------------------------------------------------
+ * Interrupt initialization
+ * -------------------------------------------------------------------- */
+
/*
* The default interrupt priority levels (0 = lowest, 7 = highest).
*/
@@ -297,10 +328,14 @@
0 /* Advanced Interrupt Controller (IRQ6) */
};
-void __init at91rm9200_init_irq(unsigned int priority[NR_AIC_IRQS])
+void __init at91rm9200_init_interrupts(unsigned int priority[NR_AIC_IRQS])
{
if (!priority)
priority = at91rm9200_default_irq_priority;
+ /* Initialize the AIC interrupt controller */
at91_aic_init(priority);
+
+ /* Enable GPIO interrupts */
+ at91_gpio_irq_setup();
}
diff --git a/arch/arm/mach-at91rm9200/board-1arm.c b/arch/arm/mach-at91rm9200/board-1arm.c
index d2aa9c4a..36eecd7 100644
--- a/arch/arm/mach-at91rm9200/board-1arm.c
+++ b/arch/arm/mach-at91rm9200/board-1arm.c
@@ -39,14 +39,6 @@
#include "generic.h"
-static void __init onearm_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(PQFP_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -62,12 +54,17 @@
static void __init onearm_map_io(void)
{
/* Initialize processor: 18.432 MHz crystal */
- at91rm9200_initialize(18432000);
+ at91rm9200_initialize(18432000, AT91RM9200_PQFP);
/* Setup the serial ports and console */
at91_init_serial(&onearm_uart_config);
}
+static void __init onearm_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata onearm_eth_data = {
.phy_irq_pin = AT91_PIN_PC4,
.is_rmii = 1,
diff --git a/arch/arm/mach-at91rm9200/board-carmeva.c b/arch/arm/mach-at91rm9200/board-carmeva.c
index 6af252b..50e5136 100644
--- a/arch/arm/mach-at91rm9200/board-carmeva.c
+++ b/arch/arm/mach-at91rm9200/board-carmeva.c
@@ -40,14 +40,6 @@
#include "generic.h"
-static void __init carmeva_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(BGA_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -63,12 +55,18 @@
static void __init carmeva_map_io(void)
{
/* Initialize processor: 20.000 MHz crystal */
- at91rm9200_initialize(20000000);
+ at91rm9200_initialize(20000000, AT91RM9200_BGA);
/* Setup the serial ports and console */
at91_init_serial(&carmeva_uart_config);
}
+static void __init carmeva_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
+
static struct at91_eth_data __initdata carmeva_eth_data = {
.phy_irq_pin = AT91_PIN_PC4,
.is_rmii = 1,
diff --git a/arch/arm/mach-at91rm9200/board-csb337.c b/arch/arm/mach-at91rm9200/board-csb337.c
index f74b483..8eeae49 100644
--- a/arch/arm/mach-at91rm9200/board-csb337.c
+++ b/arch/arm/mach-at91rm9200/board-csb337.c
@@ -39,14 +39,6 @@
#include "generic.h"
-static void __init csb337_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(BGA_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -62,7 +54,7 @@
static void __init csb337_map_io(void)
{
/* Initialize processor: 3.6864 MHz crystal */
- at91rm9200_initialize(3686400);
+ at91rm9200_initialize(3686400, AT91RM9200_BGA);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB0, AT91_PIN_PB1);
@@ -71,6 +63,11 @@
at91_init_serial(&csb337_uart_config);
}
+static void __init csb337_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata csb337_eth_data = {
.phy_irq_pin = AT91_PIN_PC2,
.is_rmii = 0,
diff --git a/arch/arm/mach-at91rm9200/board-csb637.c b/arch/arm/mach-at91rm9200/board-csb637.c
index 8803509..a29fa0e8 100644
--- a/arch/arm/mach-at91rm9200/board-csb637.c
+++ b/arch/arm/mach-at91rm9200/board-csb637.c
@@ -38,14 +38,6 @@
#include "generic.h"
-static void __init csb637_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(BGA_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -61,7 +53,7 @@
static void __init csb637_map_io(void)
{
/* Initialize processor: 3.6864 MHz crystal */
- at91rm9200_initialize(3686400);
+ at91rm9200_initialize(3686400, AT91RM9200_BGA);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);
@@ -70,6 +62,11 @@
at91_init_serial(&csb637_uart_config);
}
+static void __init csb637_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata csb637_eth_data = {
.phy_irq_pin = AT91_PIN_PC0,
.is_rmii = 0,
diff --git a/arch/arm/mach-at91rm9200/board-dk.c b/arch/arm/mach-at91rm9200/board-dk.c
index 23ea9d6..54c32d0 100644
--- a/arch/arm/mach-at91rm9200/board-dk.c
+++ b/arch/arm/mach-at91rm9200/board-dk.c
@@ -42,14 +42,6 @@
#include "generic.h"
-static void __init dk_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(BGA_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -65,7 +57,7 @@
static void __init dk_map_io(void)
{
/* Initialize processor: 18.432 MHz crystal */
- at91rm9200_initialize(18432000);
+ at91rm9200_initialize(18432000, AT91RM9200_BGA);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);
@@ -74,6 +66,11 @@
at91_init_serial(&dk_uart_config);
}
+static void __init dk_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata dk_eth_data = {
.phy_irq_pin = AT91_PIN_PC4,
.is_rmii = 1,
diff --git a/arch/arm/mach-at91rm9200/board-eb9200.c b/arch/arm/mach-at91rm9200/board-eb9200.c
index 2ceb267..c6e0d51 100644
--- a/arch/arm/mach-at91rm9200/board-eb9200.c
+++ b/arch/arm/mach-at91rm9200/board-eb9200.c
@@ -40,14 +40,6 @@
#include "generic.h"
-static void __init eb9200_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(BGA_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -63,12 +55,17 @@
static void __init eb9200_map_io(void)
{
/* Initialize processor: 18.432 MHz crystal */
- at91rm9200_initialize(18432000);
+ at91rm9200_initialize(18432000, AT91RM9200_BGA);
/* Setup the serial ports and console */
at91_init_serial(&eb9200_uart_config);
}
+static void __init eb9200_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata eb9200_eth_data = {
.phy_irq_pin = AT91_PIN_PC4,
.is_rmii = 1,
diff --git a/arch/arm/mach-at91rm9200/board-ek.c b/arch/arm/mach-at91rm9200/board-ek.c
index 8cd8336..830eb79 100644
--- a/arch/arm/mach-at91rm9200/board-ek.c
+++ b/arch/arm/mach-at91rm9200/board-ek.c
@@ -42,14 +42,6 @@
#include "generic.h"
-static void __init ek_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(BGA_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -65,7 +57,7 @@
static void __init ek_map_io(void)
{
/* Initialize processor: 18.432 MHz crystal */
- at91rm9200_initialize(18432000);
+ at91rm9200_initialize(18432000, AT91RM9200_BGA);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB1, AT91_PIN_PB2);
@@ -74,6 +66,11 @@
at91_init_serial(&ek_uart_config);
}
+static void __init ek_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata ek_eth_data = {
.phy_irq_pin = AT91_PIN_PC4,
.is_rmii = 1,
diff --git a/arch/arm/mach-at91rm9200/board-kafa.c b/arch/arm/mach-at91rm9200/board-kafa.c
index d9a6b7e..91e3019 100644
--- a/arch/arm/mach-at91rm9200/board-kafa.c
+++ b/arch/arm/mach-at91rm9200/board-kafa.c
@@ -39,14 +39,6 @@
#include "generic.h"
-static void __init kafa_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(PQFP_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -62,7 +54,7 @@
static void __init kafa_map_io(void)
{
/* Initialize processor: 18.432 MHz crystal */
- at91rm9200_initialize(18432000);
+ at91rm9200_initialize(18432000, AT91RM9200_PQFP);
/* Set up the LEDs */
at91_init_leds(AT91_PIN_PB4, AT91_PIN_PB4);
@@ -71,6 +63,11 @@
at91_init_serial(&kafa_uart_config);
}
+static void __init kafa_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata kafa_eth_data = {
.phy_irq_pin = AT91_PIN_PC4,
.is_rmii = 0,
diff --git a/arch/arm/mach-at91rm9200/board-kb9202.c b/arch/arm/mach-at91rm9200/board-kb9202.c
index 935238f..55b08f9 100644
--- a/arch/arm/mach-at91rm9200/board-kb9202.c
+++ b/arch/arm/mach-at91rm9200/board-kb9202.c
@@ -40,14 +40,6 @@
#include "generic.h"
-static void __init kb9202_init_irq(void)
-{
- /* Initialize AIC controller */
- at91rm9200_init_irq(NULL);
-
- /* Set up the GPIO interrupts */
- at91_gpio_irq_setup(PQFP_GPIO_BANKS);
-}
/*
* Serial port configuration.
@@ -63,7 +55,7 @@
static void __init kb9202_map_io(void)
{
/* Initialize processor: 10 MHz crystal */
- at91rm9200_initialize(10000000);
+ at91rm9200_initialize(10000000, AT91RM9200_PQFP);
/* Set up the LEDs */
at91_init_leds(AT91_PIN_PC19, AT91_PIN_PC18);
@@ -72,6 +64,11 @@
at91_init_serial(&kb9202_uart_config);
}
+static void __init kb9202_init_irq(void)
+{
+ at91rm9200_init_interrupts(NULL);
+}
+
static struct at91_eth_data __initdata kb9202_eth_data = {
.phy_irq_pin = AT91_PIN_PB29,
.is_rmii = 0,
diff --git a/arch/arm/mach-at91rm9200/generic.h b/arch/arm/mach-at91rm9200/generic.h
index c44e0e0..694e411 100644
--- a/arch/arm/mach-at91rm9200/generic.h
+++ b/arch/arm/mach-at91rm9200/generic.h
@@ -9,12 +9,11 @@
*/
/* Processors */
-extern void __init at91rm9200_initialize(unsigned long main_clock);
+extern void __init at91rm9200_initialize(unsigned long main_clock, unsigned short banks);
/* Interrupts */
-extern void __init at91rm9200_init_irq(unsigned int priority[]);
+extern void __init at91rm9200_init_interrupts(unsigned int priority[]);
extern void __init at91_aic_init(unsigned int priority[]);
-extern void __init at91_gpio_irq_setup(unsigned banks);
/* Timer */
struct sys_timer;
@@ -29,3 +28,14 @@
extern void at91_irq_suspend(void);
extern void at91_irq_resume(void);
+ /* GPIO */
+#define AT91RM9200_PQFP 3 /* AT91RM9200 PQFP package has 3 banks */
+#define AT91RM9200_BGA 4 /* AT91RM9200 BGA package has 4 banks */
+
+struct at91_gpio_bank {
+ unsigned short id; /* peripheral ID */
+ unsigned long offset; /* offset from system peripheral base */
+ struct clk *clock; /* associated clock */
+};
+extern void __init at91_gpio_init(struct at91_gpio_bank *, int nr_banks);
+extern void __init at91_gpio_irq_setup(void);
diff --git a/arch/arm/mach-at91rm9200/gpio.c b/arch/arm/mach-at91rm9200/gpio.c
index 8476cb8..58c9bf5 100644
--- a/arch/arm/mach-at91rm9200/gpio.c
+++ b/arch/arm/mach-at91rm9200/gpio.c
@@ -9,6 +9,7 @@
* (at your option) any later version.
*/
+#include <linux/clk.h>
#include <linux/errno.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
@@ -20,12 +21,12 @@
#include <asm/hardware.h>
#include <asm/arch/gpio.h>
-static const u32 pio_controller_offset[4] = {
- AT91_PIOA,
- AT91_PIOB,
- AT91_PIOC,
- AT91_PIOD,
-};
+#include "generic.h"
+
+
+static struct at91_gpio_bank *gpio;
+static int gpio_banks;
+
static inline void __iomem *pin_to_controller(unsigned pin)
{
@@ -33,8 +34,8 @@
pin -= PIN_BASE;
pin /= 32;
- if (likely(pin < BGA_GPIO_BANKS))
- return sys_base + pio_controller_offset[pin];
+ if (likely(pin < gpio_banks))
+ return sys_base + gpio[pin].offset;
return NULL;
}
@@ -179,7 +180,6 @@
/*--------------------------------------------------------------------------*/
-
/*
* assuming the pin is muxed as a gpio output, set its value.
*/
@@ -216,8 +216,8 @@
#ifdef CONFIG_PM
-static u32 wakeups[BGA_GPIO_BANKS];
-static u32 backups[BGA_GPIO_BANKS];
+static u32 wakeups[MAX_GPIO_BANKS];
+static u32 backups[MAX_GPIO_BANKS];
static int gpio_irq_set_wake(unsigned pin, unsigned state)
{
@@ -226,7 +226,7 @@
pin -= PIN_BASE;
pin /= 32;
- if (unlikely(pin >= BGA_GPIO_BANKS))
+ if (unlikely(pin >= MAX_GPIO_BANKS))
return -EINVAL;
if (state)
@@ -241,8 +241,8 @@
{
int i;
- for (i = 0; i < BGA_GPIO_BANKS; i++) {
- u32 pio = pio_controller_offset[i];
+ for (i = 0; i < gpio_banks; i++) {
+ u32 pio = gpio[i].offset;
/*
* Note: drivers should have disabled GPIO interrupts that
@@ -257,14 +257,14 @@
* first place!
*/
backups[i] = at91_sys_read(pio + PIO_IMR);
- at91_sys_write(pio_controller_offset[i] + PIO_IDR, backups[i]);
- at91_sys_write(pio_controller_offset[i] + PIO_IER, wakeups[i]);
+ at91_sys_write(pio + PIO_IDR, backups[i]);
+ at91_sys_write(pio + PIO_IER, wakeups[i]);
if (!wakeups[i]) {
- disable_irq_wake(AT91RM9200_ID_PIOA + i);
- at91_sys_write(AT91_PMC_PCDR, 1 << (AT91RM9200_ID_PIOA + i));
+ disable_irq_wake(gpio[i].id);
+ at91_sys_write(AT91_PMC_PCDR, 1 << gpio[i].id);
} else {
- enable_irq_wake(AT91RM9200_ID_PIOA + i);
+ enable_irq_wake(gpio[i].id);
#ifdef CONFIG_PM_DEBUG
printk(KERN_DEBUG "GPIO-%c may wake for %08x\n", "ABCD"[i], wakeups[i]);
#endif
@@ -276,16 +276,13 @@
{
int i;
- for (i = 0; i < BGA_GPIO_BANKS; i++) {
- at91_sys_write(pio_controller_offset[i] + PIO_IDR, wakeups[i]);
- at91_sys_write(pio_controller_offset[i] + PIO_IER, backups[i]);
- }
+ for (i = 0; i < gpio_banks; i++) {
+ u32 pio = gpio[i].offset;
- at91_sys_write(AT91_PMC_PCER,
- (1 << AT91RM9200_ID_PIOA)
- | (1 << AT91RM9200_ID_PIOB)
- | (1 << AT91RM9200_ID_PIOC)
- | (1 << AT91RM9200_ID_PIOD));
+ at91_sys_write(pio + PIO_IDR, wakeups[i]);
+ at91_sys_write(pio + PIO_IER, backups[i]);
+ at91_sys_write(AT91_PMC_PCER, 1 << gpio[i].id);
+ }
}
#else
@@ -377,20 +374,25 @@
/* now it may re-trigger */
}
-/* call this from board-specific init_irq */
-void __init at91_gpio_irq_setup(unsigned banks)
-{
- unsigned pioc, pin, id;
+/*--------------------------------------------------------------------------*/
- if (banks > 4)
- banks = 4;
- for (pioc = 0, pin = PIN_BASE, id = AT91RM9200_ID_PIOA;
- pioc < banks;
- pioc++, id++) {
+/*
+ * Called from the processor-specific init to enable GPIO interrupt support.
+ */
+void __init at91_gpio_irq_setup(void)
+{
+ unsigned pioc, pin;
+
+ for (pioc = 0, pin = PIN_BASE;
+ pioc < gpio_banks;
+ pioc++) {
void __iomem *controller;
+ unsigned id = gpio[pioc].id;
unsigned i;
- controller = (void __iomem *) AT91_VA_BASE_SYS + pio_controller_offset[pioc];
+ clk_enable(gpio[pioc].clock); /* enable PIO controller's clock */
+
+ controller = (void __iomem *) AT91_VA_BASE_SYS + gpio[pioc].offset;
__raw_writel(~0, controller + PIO_IDR);
set_irq_data(id, (void *) pin);
@@ -408,5 +410,16 @@
set_irq_chained_handler(id, gpio_irq_handler);
}
- pr_info("AT91: %d gpio irqs in %d banks\n", pin - PIN_BASE, banks);
+ pr_info("AT91: %d gpio irqs in %d banks\n", pin - PIN_BASE, gpio_banks);
+}
+
+/*
+ * Called from the processor-specific init to enable GPIO pin support.
+ */
+void __init at91_gpio_init(struct at91_gpio_bank *data, int nr_banks)
+{
+ BUG_ON(nr_banks > MAX_GPIO_BANKS);
+
+ gpio = data;
+ gpio_banks = nr_banks;
}
diff --git a/arch/arm/mach-at91rm9200/irq.c b/arch/arm/mach-at91rm9200/irq.c
index 8cd60a9..3e48811 100644
--- a/arch/arm/mach-at91rm9200/irq.c
+++ b/arch/arm/mach-at91rm9200/irq.c
@@ -34,8 +34,6 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
-#include "generic.h"
-
static void at91_aic_mask_irq(unsigned int irq)
{
diff --git a/include/asm-arm/arch-at91rm9200/gpio.h b/include/asm-arm/arch-at91rm9200/gpio.h
index 6243f28..a011d27 100644
--- a/include/asm-arm/arch-at91rm9200/gpio.h
+++ b/include/asm-arm/arch-at91rm9200/gpio.h
@@ -17,8 +17,7 @@
#define PIN_BASE NR_AIC_IRQS
-#define PQFP_GPIO_BANKS 3 /* PQFP package has 3 banks */
-#define BGA_GPIO_BANKS 4 /* BGA package has 4 banks */
+#define MAX_GPIO_BANKS 4
/* these pin numbers double as IRQ numbers, like AT91xxx_ID_* values */
@@ -180,17 +179,18 @@
#ifndef __ASSEMBLY__
/* setup setup routines, called from board init or driver probe() */
-extern int at91_set_A_periph(unsigned pin, int use_pullup);
-extern int at91_set_B_periph(unsigned pin, int use_pullup);
-extern int at91_set_gpio_input(unsigned pin, int use_pullup);
-extern int at91_set_gpio_output(unsigned pin, int value);
-extern int at91_set_deglitch(unsigned pin, int is_on);
-extern int at91_set_multi_drive(unsigned pin, int is_on);
+extern int __init_or_module at91_set_A_periph(unsigned pin, int use_pullup);
+extern int __init_or_module at91_set_B_periph(unsigned pin, int use_pullup);
+extern int __init_or_module at91_set_gpio_input(unsigned pin, int use_pullup);
+extern int __init_or_module at91_set_gpio_output(unsigned pin, int value);
+extern int __init_or_module at91_set_deglitch(unsigned pin, int is_on);
+extern int __init_or_module at91_set_multi_drive(unsigned pin, int is_on);
/* callable at any time */
extern int at91_set_gpio_value(unsigned pin, int value);
extern int at91_get_gpio_value(unsigned pin);
+/* callable only from core power-management code */
extern void at91_gpio_suspend(void);
extern void at91_gpio_resume(void);
#endif
