target/linux/ar7/patches-2.6.30/140-watchdog_bootcr.patch

   1 --- a/drivers/watchdog/ar7_wdt.c
   2 +++ b/drivers/watchdog/ar7_wdt.c
   3 @@ -298,14 +298,28 @@ static struct miscdevice ar7_wdt_miscdev
   4         .fops           = &ar7_wdt_fops,
   5  };
   6
   7 +#define AR7_WDT_HARDWARE_ENABLE 0x10
   8 +
   9  static int __init ar7_wdt_init(void)
  10  {
  11         int rc;
  12 +       u32 *bootcr;
  13 +       u32 bootcr_value;
  14
  15         spin_lock_init(&wdt_lock);
  16
  17         ar7_wdt_get_regs();
  18
  19 +       /* arch/mips/ar7/clocks.c is the only other thing that reads this */
  20 +       bootcr = (u32 *)ioremap_nocache(AR7_REGS_DCL, 4);
  21 +       bootcr_value = *bootcr;
  22 +       iounmap(bootcr);
  23 +
  24 +       if (!(bootcr_value & AR7_WDT_HARDWARE_ENABLE)) {
  25 +               printk(KERN_INFO DRVNAME ": watchdog disabled in hardware (bootcr=%#x)\n", bootcr_value);
  26 +               return -ENODEV;
  27 +        }
  28 +
  29         if (!request_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt),
  30                                                         LONGNAME)) {
  31                 printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");