diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1374.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1374.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c index 52429f0a57cc..38a2e9e684df 100644 --- a/drivers/rtc/rtc-ds1374.c +++ b/drivers/rtc/rtc-ds1374.c @@ -525,6 +525,10 @@ static long ds1374_wdt_ioctl(struct file *file, unsigned int cmd, if (get_user(new_margin, (int __user *)arg)) return -EFAULT; + /* the hardware's tick rate is 4096 Hz, so + * the counter value needs to be scaled accordingly + */ + new_margin <<= 12; if (new_margin < 1 || new_margin > 16777216) return -EINVAL; @@ -533,7 +537,8 @@ static long ds1374_wdt_ioctl(struct file *file, unsigned int cmd, ds1374_wdt_ping(); /* fallthrough */ case WDIOC_GETTIMEOUT: - return put_user(wdt_margin, (int __user *)arg); + /* when returning ... inverse is true */ + return put_user((wdt_margin >> 12), (int __user *)arg); case WDIOC_SETOPTIONS: if (copy_from_user(&options, (int __user *)arg, sizeof(int))) return -EFAULT; @@ -541,14 +546,15 @@ static long ds1374_wdt_ioctl(struct file *file, unsigned int cmd, if (options & WDIOS_DISABLECARD) { pr_info("disable watchdog\n"); ds1374_wdt_disable(); + return 0; } if (options & WDIOS_ENABLECARD) { pr_info("enable watchdog\n"); ds1374_wdt_settimeout(wdt_margin); ds1374_wdt_ping(); + return 0; } - return -EINVAL; } return -ENOTTY; @@ -704,6 +710,7 @@ static SIMPLE_DEV_PM_OPS(ds1374_pm, ds1374_suspend, ds1374_resume); static struct i2c_driver ds1374_driver = { .driver = { .name = "rtc-ds1374", + .of_match_table = of_match_ptr(ds1374_of_match), .pm = &ds1374_pm, }, .probe = ds1374_probe, |