diff options
Diffstat (limited to 'arch/cris/arch-v32/drivers/i2c.c')
| -rw-r--r-- | arch/cris/arch-v32/drivers/i2c.c | 61 |
1 files changed, 12 insertions, 49 deletions
diff --git a/arch/cris/arch-v32/drivers/i2c.c b/arch/cris/arch-v32/drivers/i2c.c index 4eda323..c2fb7a5 100644 --- a/arch/cris/arch-v32/drivers/i2c.c +++ b/arch/cris/arch-v32/drivers/i2c.c @@ -395,14 +395,10 @@ i2c_write(unsigned char theSlave, void *data, size_t nbytes) unsigned char value; unsigned long flags; - spin_lock(&i2c_lock); + spin_lock_irqsave(&i2c_lock, flags); do { error = 0; - /* - * we don't like to be interrupted - */ - local_irq_save(flags); i2c_start(); /* @@ -430,16 +426,12 @@ i2c_write(unsigned char theSlave, void *data, size_t nbytes) * end byte stream */ i2c_stop(); - /* - * enable interrupt again - */ - local_irq_restore(flags); } while (error && cntr--); i2c_delay(CLOCK_LOW_TIME); - spin_unlock(&i2c_lock); + spin_unlock_irqrestore(&i2c_lock, flags); return -error; } @@ -459,16 +451,12 @@ i2c_read(unsigned char theSlave, void *data, size_t nbytes) int error, cntr = 3; unsigned long flags; - spin_lock(&i2c_lock); + spin_lock_irqsave(&i2c_lock, flags); do { error = 0; memset(data, 0, nbytes); /* - * we don't like to be interrupted - */ - local_irq_save(flags); - /* * generate start condition */ i2c_start(); @@ -500,13 +488,9 @@ i2c_read(unsigned char theSlave, void *data, size_t nbytes) * end sequence */ i2c_stop(); - /* - * enable interrupt again - */ - local_irq_restore(flags); } while (error && cntr--); - spin_unlock(&i2c_lock); + spin_unlock_irqrestore(&i2c_lock, flags); return -error; } @@ -525,14 +509,10 @@ i2c_writereg(unsigned char theSlave, unsigned char theReg, int error, cntr = 3; unsigned long flags; - spin_lock(&i2c_lock); + spin_lock_irqsave(&i2c_lock, flags); do { error = 0; - /* - * we don't like to be interrupted - */ - local_irq_save(flags); i2c_start(); /* @@ -567,15 +547,11 @@ i2c_writereg(unsigned char theSlave, unsigned char theReg, * end byte stream */ i2c_stop(); - /* - * enable interrupt again - */ - local_irq_restore(flags); } while(error && cntr--); i2c_delay(CLOCK_LOW_TIME); - spin_unlock(&i2c_lock); + spin_unlock_irqrestore(&i2c_lock, flags); return -error; } @@ -594,15 +570,11 @@ i2c_readreg(unsigned char theSlave, unsigned char theReg) int error, cntr = 3; unsigned long flags; - spin_lock(&i2c_lock); + spin_lock_irqsave(&i2c_lock, flags); do { error = 0; /* - * we don't like to be interrupted - */ - local_irq_save(flags); - /* * generate start condition */ i2c_start(); @@ -653,14 +625,10 @@ i2c_readreg(unsigned char theSlave, unsigned char theReg) * end sequence */ i2c_stop(); - /* - * enable interrupt again - */ - local_irq_restore(flags); } while(error && cntr--); - spin_unlock(&i2c_lock); + spin_unlock_irqrestore(&i2c_lock, flags); return b; } @@ -685,7 +653,7 @@ i2c_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) { if(_IOC_TYPE(cmd) != ETRAXI2C_IOCTYPE) { - return -EINVAL; + return -ENOTTY; } switch (_IOC_NR(cmd)) { @@ -725,8 +693,7 @@ static const struct file_operations i2c_fops = { .release = i2c_release, }; -int __init -i2c_init(void) +static int __init i2c_init(void) { static int res; static int first = 1; @@ -750,10 +717,8 @@ i2c_init(void) } -int __init -i2c_register(void) +static int __init i2c_register(void) { - int res; res = i2c_init(); @@ -763,7 +728,7 @@ i2c_register(void) /* register char device */ res = register_chrdev(I2C_MAJOR, i2c_name, &i2c_fops); - if(res < 0) { + if (res < 0) { printk(KERN_ERR "i2c: couldn't get a major number.\n"); return res; } @@ -773,9 +738,7 @@ i2c_register(void) return 0; } - /* this makes sure that i2c_init is called during boot */ - module_init(i2c_register); /****************** END OF FILE i2c.c ********************************/ |
