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authorJim Cromie <jim.cromie@gmail.com>2006-06-27 02:54:20 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-27 17:32:43 -0700
commit1a66fdf083bf2b60c4d12feb970bc7373b59e33a (patch)
treef1e9d67e5c2fb3f9e7e575a6a9c44db3af6f6c22 /drivers/char/scx200_gpio.c
parent1ca5df0a4cbd17a9536e63c5f69d4717c6538eb0 (diff)
downloadlinux-1a66fdf083bf2b60c4d12feb970bc7373b59e33a.tar.gz
[PATCH] chardev: GPIO for SCx200 & PC-8736x: migrate file-ops to common module
Now that the read(), write() file-ops are dispatching gpio-ops via the vtable, they are generic, and can be moved 'verbatim' to the nsc_gpio common-support module. After the move, various symbols are renamed to update 'scx200_' to 'nsc_', and headers are adjusted accordingly. Signed-off-by: Jim Cromie <jim.cromie@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/scx200_gpio.c')
-rw-r--r--drivers/char/scx200_gpio.c88
1 files changed, 8 insertions, 80 deletions
diff --git a/drivers/char/scx200_gpio.c b/drivers/char/scx200_gpio.c
index 15dfb95ebc7..eb9a8477759 100644
--- a/drivers/char/scx200_gpio.c
+++ b/drivers/char/scx200_gpio.c
@@ -37,6 +37,12 @@ MODULE_PARM_DESC(major, "Major device number");
extern void scx200_gpio_dump(unsigned index);
+extern ssize_t nsc_gpio_write(struct file *file, const char __user *data,
+ size_t len, loff_t *ppos);
+
+extern ssize_t nsc_gpio_read(struct file *file, char __user *buf,
+ size_t len, loff_t *ppos);
+
struct nsc_gpio_ops scx200_access = {
.owner = THIS_MODULE,
.gpio_config = scx200_gpio_configure,
@@ -49,84 +55,6 @@ struct nsc_gpio_ops scx200_access = {
.gpio_current = scx200_gpio_current
};
-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);
- struct nsc_gpio_ops *amp = file->private_data;
- size_t i;
- int err = 0;
-
- for (i = 0; i < len; ++i) {
- char c;
- if (get_user(c, data + i))
- return -EFAULT;
- switch (c) {
- case '0':
- amp->gpio_set(m, 0);
- break;
- case '1':
- amp->gpio_set(m, 1);
- break;
- case 'O':
- printk(KERN_INFO NAME ": GPIO%d output enabled\n", m);
- amp->gpio_config(m, ~1, 1);
- break;
- case 'o':
- printk(KERN_INFO NAME ": GPIO%d output disabled\n", m);
- amp->gpio_config(m, ~1, 0);
- break;
- case 'T':
- printk(KERN_INFO NAME ": GPIO%d output is push pull\n", m);
- amp->gpio_config(m, ~2, 2);
- break;
- case 't':
- printk(KERN_INFO NAME ": GPIO%d output is open drain\n", m);
- amp->gpio_config(m, ~2, 0);
- break;
- case 'P':
- printk(KERN_INFO NAME ": GPIO%d pull up enabled\n", m);
- amp->gpio_config(m, ~4, 4);
- break;
- case 'p':
- printk(KERN_INFO NAME ": GPIO%d pull up disabled\n", m);
- amp->gpio_config(m, ~4, 0);
- break;
-
- case 'v':
- /* View Current pin settings */
- amp->gpio_dump(m);
- break;
- case '\n':
- /* end of settings string, do nothing */
- break;
- default:
- printk(KERN_ERR NAME
- ": GPIO-%2d bad setting: chr<0x%2x>\n", m,
- (int)c);
- err++;
- }
- }
- if (err)
- return -EINVAL; /* full string handled, report error */
-
- return len;
-}
-
-static ssize_t scx200_gpio_read(struct file *file, char __user *buf,
- size_t len, loff_t *ppos)
-{
- unsigned m = iminor(file->f_dentry->d_inode);
- int value;
- struct nsc_gpio_ops *amp = file->private_data;
-
- value = amp->gpio_get(m);
- if (put_user(value ? '1' : '0', buf))
- return -EFAULT;
-
- return 1;
-}
-
static int scx200_gpio_open(struct inode *inode, struct file *file)
{
unsigned m = iminor(inode);
@@ -145,8 +73,8 @@ static int scx200_gpio_release(struct inode *inode, struct file *file)
static struct file_operations scx200_gpio_fops = {
.owner = THIS_MODULE,
- .write = scx200_gpio_write,
- .read = scx200_gpio_read,
+ .write = nsc_gpio_write,
+ .read = nsc_gpio_read,
.open = scx200_gpio_open,
.release = scx200_gpio_release,
};