-static long wm831x_wdt_ioctl(struct file *file, unsigned int cmd,
- unsigned long arg)
-{
- int ret = -ENOTTY, time, i;
- void __user *argp = (void __user *)arg;
- int __user *p = argp;
- u16 reg;
-
- switch (cmd) {
- case WDIOC_GETSUPPORT:
- ret = copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
- break;
-
- case WDIOC_GETSTATUS:
- case WDIOC_GETBOOTSTATUS:
- ret = put_user(0, p);
- break;
-
- case WDIOC_SETOPTIONS:
- {
- int options;
-
- if (get_user(options, p))
- return -EFAULT;
-
- ret = -EINVAL;
-
- /* Setting both simultaneously means at least one must fail */
- if (options == WDIOS_DISABLECARD)
- ret = wm831x_wdt_start(wm831x);
-
- if (options == WDIOS_ENABLECARD)
- ret = wm831x_wdt_stop(wm831x);
- break;
- }
-
- case WDIOC_KEEPALIVE:
- ret = wm831x_wdt_kick(wm831x);
- break;
-
- case WDIOC_SETTIMEOUT:
- ret = get_user(time, p);
- if (ret)
- break;
-
- if (time == 0) {
- if (nowayout)
- ret = -EINVAL;
- else
- wm831x_wdt_stop(wm831x);
- break;
- }
-
- for (i = 0; i < ARRAY_SIZE(wm831x_wdt_cfgs); i++)
- if (wm831x_wdt_cfgs[i].time == time)
- break;
- if (i == ARRAY_SIZE(wm831x_wdt_cfgs))
- ret = -EINVAL;
- else
- ret = wm831x_wdt_set_timeout(wm831x,
- wm831x_wdt_cfgs[i].val);
- break;
-
- case WDIOC_GETTIMEOUT:
- reg = wm831x_reg_read(wm831x, WM831X_WATCHDOG);
- reg &= WM831X_WDOG_TO_MASK;
- for (i = 0; i < ARRAY_SIZE(wm831x_wdt_cfgs); i++)
- if (wm831x_wdt_cfgs[i].val == reg)
- break;
- if (i == ARRAY_SIZE(wm831x_wdt_cfgs)) {
- dev_warn(wm831x->dev,
- "Unknown watchdog configuration: %x\n", reg);
- ret = -EINVAL;
- } else
- ret = put_user(wm831x_wdt_cfgs[i].time, p);
-
- }
-
- return ret;
-}
-
-static const struct file_operations wm831x_wdt_fops = {