unsigned long arg);
#endif
static int gpio_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg);
-static ssize_t gpio_write(struct file *file, const char *buf, size_t count,
- loff_t *off);
+ unsigned int cmd, unsigned long arg);
+static ssize_t gpio_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *off);
static int gpio_open(struct inode *inode, struct file *filp);
static int gpio_release(struct inode *inode, struct file *filp);
static unsigned int gpio_poll(struct file *filp,
- struct poll_table_struct *wait);
+ struct poll_table_struct *wait);
/* private data per open() of this driver */
};
static void gpio_set_alarm(struct gpio_private *priv);
+static int gpio_leds_ioctl(unsigned int cmd, unsigned long arg);
+static int gpio_pwm_ioctl(struct gpio_private *priv, unsigned int cmd,
+ unsigned long arg);
+
/* linked list of alarms to check for */
static int wanted_interrupts;
-static DEFINE_SPINLOCK(alarm_lock);
+static DEFINE_SPINLOCK(gpio_lock);
#define NUM_PORTS (GPIO_MINOR_LAST+1)
#define GIO_REG_RD_ADDR(reg) \
- (volatile unsigned long *)(regi_gio + REG_RD_ADDR_gio_##reg)
+ (unsigned long *)(regi_gio + REG_RD_ADDR_gio_##reg)
#define GIO_REG_WR_ADDR(reg) \
- (volatile unsigned long *)(regi_gio + REG_WR_ADDR_gio_##reg)
-unsigned long led_dummy;
-unsigned long port_d_dummy; /* Only input on Artpec-3 */
-unsigned long port_e_dummy; /* Non existent on Artpec-3 */
+ (unsigned long *)(regi_gio + REG_WR_ADDR_gio_##reg)
+static unsigned long led_dummy;
+static unsigned long port_d_dummy; /* Only input on Artpec-3 */
#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
+static unsigned long port_e_dummy; /* Non existent on Artpec-3 */
static unsigned long virtual_dummy;
static unsigned long virtual_rw_pv_oe = CONFIG_ETRAX_DEF_GIO_PV_OE;
static unsigned short cached_virtual_gpio_read;
#endif
-static volatile unsigned long *data_out[NUM_PORTS] = {
+static unsigned long *data_out[NUM_PORTS] = {
GIO_REG_WR_ADDR(rw_pa_dout),
GIO_REG_WR_ADDR(rw_pb_dout),
&led_dummy,
#endif
};
-static volatile unsigned long *data_in[NUM_PORTS] = {
+static unsigned long *data_in[NUM_PORTS] = {
GIO_REG_RD_ADDR(r_pa_din),
GIO_REG_RD_ADDR(r_pb_din),
&led_dummy,
#endif
};
-static volatile unsigned long *dir_oe[NUM_PORTS] = {
+static unsigned long *dir_oe[NUM_PORTS] = {
GIO_REG_WR_ADDR(rw_pa_oe),
GIO_REG_WR_ADDR(rw_pb_oe),
&led_dummy,
#endif
};
-static void
-gpio_set_alarm(struct gpio_private *priv)
+static void gpio_set_alarm(struct gpio_private *priv)
{
int bit;
int intr_cfg;
int pins;
unsigned long flags;
- local_irq_save(flags);
+ spin_lock_irqsave(&gpio_lock, flags);
intr_cfg = REG_RD_INT(gio, regi_gio, rw_intr_cfg);
pins = REG_RD_INT(gio, regi_gio, rw_intr_pins);
mask = REG_RD_INT(gio, regi_gio, rw_intr_mask) & I2C_INTERRUPT_BITS;
REG_WR_INT(gio, regi_gio, rw_intr_pins, pins);
REG_WR_INT(gio, regi_gio, rw_intr_mask, mask);
- local_irq_restore(flags);
+ spin_unlock_irqrestore(&gpio_lock, flags);
}
-static unsigned int
-gpio_poll(struct file *file, struct poll_table_struct *wait)
+static unsigned int gpio_poll(struct file *file, struct poll_table_struct *wait)
{
unsigned int mask = 0;
- struct gpio_private *priv = (struct gpio_private *)file->private_data;
+ struct gpio_private *priv = file->private_data;
unsigned long data;
unsigned long tmp;
poll_wait(file, &priv->alarm_wq, wait);
if (priv->minor <= GPIO_MINOR_D) {
- data = *data_in[priv->minor];
+ data = readl(data_in[priv->minor]);
REG_WR_INT(gio, regi_gio, rw_ack_intr, wanted_interrupts);
tmp = REG_RD_INT(gio, regi_gio, rw_intr_mask);
tmp &= I2C_INTERRUPT_BITS;
return mask;
}
-static irqreturn_t
-gpio_interrupt(int irq, void *dev_id)
+static irqreturn_t gpio_interrupt(int irq, void *dev_id)
{
reg_gio_rw_intr_mask intr_mask;
reg_gio_r_masked_intr masked_intr;
reg_gio_rw_ack_intr ack_intr;
+ unsigned long flags;
unsigned long tmp;
unsigned long tmp2;
#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
tmp = REG_TYPE_CONV(unsigned long, reg_gio_r_masked_intr, masked_intr);
/* Find those that we have enabled */
- spin_lock(&alarm_lock);
+ spin_lock_irqsave(&gpio_lock, flags);
tmp &= wanted_interrupts;
- spin_unlock(&alarm_lock);
+ spin_unlock_irqrestore(&gpio_lock, flags);
#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
/* Something changed on virtual GPIO. Interrupt is acked by
return IRQ_RETVAL(tmp);
}
+static void gpio_write_bit(unsigned long *port, unsigned char data, int bit,
+ unsigned char clk_mask, unsigned char data_mask)
+{
+ unsigned long shadow = readl(port) & ~clk_mask;
+ writel(shadow, port);
+ if (data & 1 << bit)
+ shadow |= data_mask;
+ else
+ shadow &= ~data_mask;
+ writel(shadow, port);
+ /* For FPGA: min 5.0ns (DCC) before CCLK high */
+ shadow |= clk_mask;
+ writel(shadow, port);
+}
+
+static void gpio_write_byte(struct gpio_private *priv, unsigned long *port,
+ unsigned char data)
+{
+ int i;
+
+ if (priv->write_msb)
+ for (i = 7; i >= 0; i--)
+ gpio_write_bit(port, data, i, priv->clk_mask,
+ priv->data_mask);
+ else
+ for (i = 0; i <= 7; i++)
+ gpio_write_bit(port, data, i, priv->clk_mask,
+ priv->data_mask);
+}
+
-static ssize_t gpio_write(struct file *file, const char *buf, size_t count,
- loff_t *off)
+static ssize_t gpio_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *off)
{
- struct gpio_private *priv = (struct gpio_private *)file->private_data;
- unsigned char data, clk_mask, data_mask, write_msb;
+ struct gpio_private *priv = file->private_data;
unsigned long flags;
- unsigned long shadow;
- volatile unsigned long *port;
ssize_t retval = count;
/* Only bits 0-7 may be used for write operations but allow all
devices except leds... */
if (!access_ok(VERIFY_READ, buf, count))
return -EFAULT;
- clk_mask = priv->clk_mask;
- data_mask = priv->data_mask;
/* It must have been configured using the IO_CFG_WRITE_MODE */
/* Perhaps a better error code? */
- if (clk_mask == 0 || data_mask == 0)
+ if (priv->clk_mask == 0 || priv->data_mask == 0)
return -EPERM;
- write_msb = priv->write_msb;
D(printk(KERN_DEBUG "gpio_write: %lu to data 0x%02X clk 0x%02X "
"msb: %i\n",
- count, data_mask, clk_mask, write_msb));
- port = data_out[priv->minor];
-
- while (count--) {
- int i;
- data = *buf++;
- if (priv->write_msb) {
- for (i = 7; i >= 0; i--) {
- local_irq_save(flags);
- shadow = *port;
- *port = shadow &= ~clk_mask;
- if (data & 1<<i)
- *port = shadow |= data_mask;
- else
- *port = shadow &= ~data_mask;
- /* For FPGA: min 5.0ns (DCC) before CCLK high */
- *port = shadow |= clk_mask;
- local_irq_restore(flags);
- }
- } else {
- for (i = 0; i <= 7; i++) {
- local_irq_save(flags);
- shadow = *port;
- *port = shadow &= ~clk_mask;
- if (data & 1<<i)
- *port = shadow |= data_mask;
- else
- *port = shadow &= ~data_mask;
- /* For FPGA: min 5.0ns (DCC) before CCLK high */
- *port = shadow |= clk_mask;
- local_irq_restore(flags);
- }
- }
- }
+ count, priv->data_mask, priv->clk_mask, priv->write_msb));
+
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ while (count--)
+ gpio_write_byte(priv, data_out[priv->minor], *buf++);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
return retval;
}
-static int
-gpio_open(struct inode *inode, struct file *filp)
+static int gpio_open(struct inode *inode, struct file *filp)
{
struct gpio_private *priv;
int p = iminor(inode);
memset(priv, 0, sizeof(*priv));
priv->minor = p;
- filp->private_data = (void *)priv;
+ filp->private_data = priv;
/* initialize the io/alarm struct, not for PWM ports though */
if (p <= GPIO_MINOR_LAST) {
init_waitqueue_head(&priv->alarm_wq);
/* link it into our alarmlist */
- spin_lock_irq(&alarm_lock);
+ spin_lock_irq(&gpio_lock);
priv->next = alarmlist;
alarmlist = priv;
- spin_unlock_irq(&alarm_lock);
+ spin_unlock_irq(&gpio_lock);
}
return 0;
}
-static int
-gpio_release(struct inode *inode, struct file *filp)
+static int gpio_release(struct inode *inode, struct file *filp)
{
struct gpio_private *p;
struct gpio_private *todel;
unsigned long a_high, a_low;
/* prepare to free private structure */
- todel = (struct gpio_private *)filp->private_data;
+ todel = filp->private_data;
/* unlink from alarmlist - only for non-PWM ports though */
if (todel->minor <= GPIO_MINOR_LAST) {
- spin_lock_irq(&alarm_lock);
+ spin_lock_irq(&gpio_lock);
p = alarmlist;
if (p == todel)
a_low |= (1 << CONFIG_ETRAX_VIRTUAL_GPIO_INTERRUPT_PA_PIN);
#endif
- spin_unlock_irq(&alarm_lock);
+ spin_unlock_irq(&gpio_lock);
}
kfree(todel);
unsigned long flags;
unsigned long dir_shadow;
- local_irq_save(flags);
- dir_shadow = *dir_oe[priv->minor];
- dir_shadow &= ~(arg & changeable_dir[priv->minor]);
- *dir_oe[priv->minor] = dir_shadow;
- local_irq_restore(flags);
+ spin_lock_irqsave(&gpio_lock, flags);
+
+ dir_shadow = readl(dir_oe[priv->minor]) &
+ ~(arg & changeable_dir[priv->minor]);
+ writel(dir_shadow, dir_oe[priv->minor]);
+
+ spin_unlock_irqrestore(&gpio_lock, flags);
if (priv->minor == GPIO_MINOR_C)
dir_shadow ^= 0xFFFF; /* Only 16 bits */
} /* setget_input */
-inline unsigned long setget_output(struct gpio_private *priv, unsigned long arg)
+static inline unsigned long setget_output(struct gpio_private *priv,
+ unsigned long arg)
{
unsigned long flags;
unsigned long dir_shadow;
- local_irq_save(flags);
- dir_shadow = *dir_oe[priv->minor];
- dir_shadow |= (arg & changeable_dir[priv->minor]);
- *dir_oe[priv->minor] = dir_shadow;
- local_irq_restore(flags);
- return dir_shadow;
-} /* setget_output */
+ spin_lock_irqsave(&gpio_lock, flags);
-static int
-gpio_leds_ioctl(unsigned int cmd, unsigned long arg);
+ dir_shadow = readl(dir_oe[priv->minor]) |
+ (arg & changeable_dir[priv->minor]);
+ writel(dir_shadow, dir_oe[priv->minor]);
-static int
-gpio_pwm_ioctl(struct gpio_private *priv, unsigned int cmd, unsigned long arg);
+ spin_unlock_irqrestore(&gpio_lock, flags);
+ return dir_shadow;
+} /* setget_output */
-static int
-gpio_ioctl(struct inode *inode, struct file *file,
- unsigned int cmd, unsigned long arg)
+static int gpio_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
{
unsigned long flags;
unsigned long val;
unsigned long shadow;
- struct gpio_private *priv = (struct gpio_private *)file->private_data;
+ struct gpio_private *priv = file->private_data;
if (_IOC_TYPE(cmd) != ETRAXGPIO_IOCTYPE)
- return -EINVAL;
+ return -ENOTTY;
/* Check for special ioctl handlers first */
switch (_IOC_NR(cmd)) {
case IO_READBITS: /* Use IO_READ_INBITS and IO_READ_OUTBITS instead */
/* Read the port. */
- return *data_in[priv->minor];
- break;
+ return readl(data_in[priv->minor]);
case IO_SETBITS:
- local_irq_save(flags);
+ spin_lock_irqsave(&gpio_lock, flags);
/* Set changeable bits with a 1 in arg. */
- shadow = *data_out[priv->minor];
- shadow |= (arg & changeable_bits[priv->minor]);
- *data_out[priv->minor] = shadow;
- local_irq_restore(flags);
+ shadow = readl(data_out[priv->minor]) |
+ (arg & changeable_bits[priv->minor]);
+ writel(shadow, data_out[priv->minor]);
+ spin_unlock_irqrestore(&gpio_lock, flags);
break;
case IO_CLRBITS:
- local_irq_save(flags);
+ spin_lock_irqsave(&gpio_lock, flags);
/* Clear changeable bits with a 1 in arg. */
- shadow = *data_out[priv->minor];
- shadow &= ~(arg & changeable_bits[priv->minor]);
- *data_out[priv->minor] = shadow;
- local_irq_restore(flags);
+ shadow = readl(data_out[priv->minor]) &
+ ~(arg & changeable_bits[priv->minor]);
+ writel(shadow, data_out[priv->minor]);
+ spin_unlock_irqrestore(&gpio_lock, flags);
break;
case IO_HIGHALARM:
/* Set alarm when bits with 1 in arg go high. */
break;
case IO_READDIR: /* Use IO_SETGET_INPUT/OUTPUT instead! */
/* Read direction 0=input 1=output */
- return *dir_oe[priv->minor];
+ return readl(dir_oe[priv->minor]);
+
case IO_SETINPUT: /* Use IO_SETGET_INPUT instead! */
/* Set direction 0=unchanged 1=input,
* return mask with 1=input
*/
return setget_input(priv, arg);
- break;
+
case IO_SETOUTPUT: /* Use IO_SETGET_OUTPUT instead! */
/* Set direction 0=unchanged 1=output,
* return mask with 1=output
case IO_CFG_WRITE_MODE:
{
- unsigned long dir_shadow;
- dir_shadow = *dir_oe[priv->minor];
+ int res = -EPERM;
+ unsigned long dir_shadow, clk_mask, data_mask, write_msb;
+
+ clk_mask = arg & 0xFF;
+ data_mask = (arg >> 8) & 0xFF;
+ write_msb = (arg >> 16) & 0x01;
- priv->clk_mask = arg & 0xFF;
- priv->data_mask = (arg >> 8) & 0xFF;
- priv->write_msb = (arg >> 16) & 0x01;
/* Check if we're allowed to change the bits and
* the direction is correct
*/
- if (!((priv->clk_mask & changeable_bits[priv->minor]) &&
- (priv->data_mask & changeable_bits[priv->minor]) &&
- (priv->clk_mask & dir_shadow) &&
- (priv->data_mask & dir_shadow))) {
- priv->clk_mask = 0;
- priv->data_mask = 0;
- return -EPERM;
+ spin_lock_irqsave(&gpio_lock, flags);
+ dir_shadow = readl(dir_oe[priv->minor]);
+ if ((clk_mask & changeable_bits[priv->minor]) &&
+ (data_mask & changeable_bits[priv->minor]) &&
+ (clk_mask & dir_shadow) &&
+ (data_mask & dir_shadow)) {
+ priv->clk_mask = clk_mask;
+ priv->data_mask = data_mask;
+ priv->write_msb = write_msb;
+ res = 0;
}
- break;
+ spin_unlock_irqrestore(&gpio_lock, flags);
+
+ return res;
}
case IO_READ_INBITS:
/* *arg is result of reading the input pins */
- val = *data_in[priv->minor];
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ val = readl(data_in[priv->minor]);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
return 0;
- break;
case IO_READ_OUTBITS:
/* *arg is result of reading the output shadow */
val = *data_out[priv->minor];
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
break;
case IO_SETGET_INPUT:
/* bits set in *arg is set to input,
* *arg updated with current input pins.
*/
- if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
return -EFAULT;
val = setget_input(priv, val);
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
break;
case IO_SETGET_OUTPUT:
/* bits set in *arg is set to output,
* *arg updated with current output pins.
*/
- if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
return -EFAULT;
val = setget_output(priv, val);
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
break;
default:
}
#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
-static int
-virtual_gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static int virtual_gpio_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
{
unsigned long flags;
unsigned short val;
unsigned short shadow;
- struct gpio_private *priv = (struct gpio_private *)file->private_data;
+ struct gpio_private *priv = file->private_data;
switch (_IOC_NR(cmd)) {
case IO_SETBITS:
- local_irq_save(flags);
+ spin_lock_irqsave(&gpio_lock, flags);
/* Set changeable bits with a 1 in arg. */
i2c_read(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
- shadow |= ~*dir_oe[priv->minor];
- shadow |= (arg & changeable_bits[priv->minor]);
+ shadow |= ~readl(dir_oe[priv->minor]) |
+ (arg & changeable_bits[priv->minor]);
i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
- local_irq_restore(flags);
+ spin_lock_irqrestore(&gpio_lock, flags);
break;
case IO_CLRBITS:
- local_irq_save(flags);
+ spin_lock_irqsave(&gpio_lock, flags);
/* Clear changeable bits with a 1 in arg. */
i2c_read(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
- shadow |= ~*dir_oe[priv->minor];
- shadow &= ~(arg & changeable_bits[priv->minor]);
+ shadow |= ~readl(dir_oe[priv->minor]) &
+ ~(arg & changeable_bits[priv->minor]);
i2c_write(VIRT_I2C_ADDR, (void *)&shadow, sizeof(shadow));
- local_irq_restore(flags);
+ spin_lock_irqrestore(&gpio_lock, flags);
break;
case IO_HIGHALARM:
/* Set alarm when bits with 1 in arg go high. */
case IO_CFG_WRITE_MODE:
{
unsigned long dir_shadow;
- dir_shadow = *dir_oe[priv->minor];
+ dir_shadow = readl(dir_oe[priv->minor]);
priv->clk_mask = arg & 0xFF;
priv->data_mask = (arg >> 8) & 0xFF;
}
case IO_READ_INBITS:
/* *arg is result of reading the input pins */
- val = cached_virtual_gpio_read;
- val &= ~*dir_oe[priv->minor];
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ val = cached_virtual_gpio_read & ~readl(dir_oe[priv->minor]);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
return 0;
- break;
+
case IO_READ_OUTBITS:
/* *arg is result of reading the output shadow */
i2c_read(VIRT_I2C_ADDR, (void *)&val, sizeof(val));
- val &= *dir_oe[priv->minor];
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ val &= readl(dir_oe[priv->minor]);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
break;
case IO_SETGET_INPUT:
/* bits set in *arg is set to input,
* *arg updated with current input pins.
*/
- unsigned short input_mask = ~*dir_oe[priv->minor];
- if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ unsigned short input_mask = ~readl(dir_oe[priv->minor]);
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
return -EFAULT;
val = setget_input(priv, val);
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
if ((input_mask & val) != input_mask) {
/* Input pins changed. All ports desired as input
/* bits set in *arg is set to output,
* *arg updated with current output pins.
*/
- if (copy_from_user(&val, (unsigned long *)arg, sizeof(val)))
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val)))
return -EFAULT;
val = setget_output(priv, val);
- if (copy_to_user((unsigned long *)arg, &val, sizeof(val)))
+ if (copy_to_user((void __user *)arg, &val, sizeof(val)))
return -EFAULT;
break;
default:
}
#endif /* CONFIG_ETRAX_VIRTUAL_GPIO */
-static int
-gpio_leds_ioctl(unsigned int cmd, unsigned long arg)
+static int gpio_leds_ioctl(unsigned int cmd, unsigned long arg)
{
unsigned char green;
unsigned char red;
struct io_pwm_set_period periods;
reg_gio_rw_pwm0_var rw_pwm_widths;
- if (copy_from_user(&periods, (struct io_pwm_set_period *) arg,
- sizeof(periods)))
+ if (copy_from_user(&periods, (void __user *)arg, sizeof(periods)))
return -EFAULT;
if (periods.lo > 8191 || periods.hi > 8191)
return -EINVAL;
return 0;
}
-static int
-gpio_pwm_ioctl(struct gpio_private *priv, unsigned int cmd, unsigned long arg)
+static int gpio_pwm_ioctl(struct gpio_private *priv, unsigned int cmd,
+ unsigned long arg)
{
int pwm_port = priv->minor - GPIO_MINOR_PWM0;
return 0;
}
-struct file_operations gpio_fops = {
+static const struct file_operations gpio_fops = {
.owner = THIS_MODULE,
.poll = gpio_poll,
.ioctl = gpio_ioctl,
};
#ifdef CONFIG_ETRAX_VIRTUAL_GPIO
-static void
-virtual_gpio_init(void)
+static void __init virtual_gpio_init(void)
{
reg_gio_rw_intr_cfg intr_cfg;
reg_gio_rw_intr_mask intr_mask;
/* main driver initialization routine, called from mem.c */
-static __init int
-gpio_init(void)
+static int __init gpio_init(void)
{
int res;
+ printk(KERN_INFO "ETRAX FS GPIO driver v2.7, (c) 2003-2008 "
+ "Axis Communications AB\n");
+
/* do the formalities */
res = register_chrdev(GPIO_MAJOR, gpio_name, &gpio_fops);
CRIS_LED_DISK_READ(0);
CRIS_LED_DISK_WRITE(0);
- printk(KERN_INFO "ETRAX FS GPIO driver v2.6, (c) 2003-2007 "
- "Axis Communications AB\n");
- if (request_irq(GIO_INTR_VECT, gpio_interrupt,
- IRQF_SHARED | IRQF_DISABLED, "gpio", &alarmlist))
+ int res2 = request_irq(GIO_INTR_VECT, gpio_interrupt,
+ IRQF_SHARED | IRQF_DISABLED, "gpio", &alarmlist);
+ if (res2) {
printk(KERN_ERR "err: irq for gpio\n");
+ return res2;
+ }
/* No IRQs by default. */
REG_WR_INT(gio, regi_gio, rw_intr_pins, 0);
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff