diff options
Diffstat (limited to 'drivers/char/scx200_gpio.c')
| -rw-r--r-- | drivers/char/scx200_gpio.c | 26 |
1 files changed, 9 insertions, 17 deletions
diff --git a/drivers/char/scx200_gpio.c b/drivers/char/scx200_gpio.c index 664a6e97eb1a..dd051ea6755e 100644 --- a/drivers/char/scx200_gpio.c +++ b/drivers/char/scx200_gpio.c @@ -1,4 +1,4 @@ -/* linux/drivers/char/scx200_gpio.c +/* linux/drivers/char/scx200_gpio.c National Semiconductor SCx200 GPIO driver. Allows a user space process to play with the GPIO pins. @@ -26,7 +26,7 @@ static int major = 0; /* default to dynamic major */ module_param(major, int, 0); MODULE_PARM_DESC(major, "Major device number"); -static ssize_t scx200_gpio_write(struct file *file, const char __user *data, +static ssize_t scx200_gpio_write(struct file *file, const char __user *data, size_t len, loff_t *ppos) { unsigned m = iminor(file->f_dentry->d_inode); @@ -34,15 +34,14 @@ static ssize_t scx200_gpio_write(struct file *file, const char __user *data, for (i = 0; i < len; ++i) { char c; - if (get_user(c, data+i)) + if (get_user(c, data + i)) return -EFAULT; - switch (c) - { - case '0': - scx200_gpio_set(m, 0); + switch (c) { + case '0': + scx200_gpio_set(m, 0); break; - case '1': - scx200_gpio_set(m, 1); + case '1': + scx200_gpio_set(m, 1); break; case 'O': printk(KERN_INFO NAME ": GPIO%d output enabled\n", m); @@ -83,7 +82,7 @@ static ssize_t scx200_gpio_read(struct file *file, char __user *buf, value = scx200_gpio_get(m); if (put_user(value ? '1' : '0', buf)) return -EFAULT; - + return 1; } @@ -140,10 +139,3 @@ static void __exit scx200_gpio_cleanup(void) module_init(scx200_gpio_init); module_exit(scx200_gpio_cleanup); - -/* - Local variables: - compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules" - c-basic-offset: 8 - End: -*/ |