target/linux/ar7/patches-2.6.27/140-watchdog_bootcr.patch

   1 --- a/drivers/watchdog/ar7_wdt.c        2009-01-25 01:17:01.000000000 +1300
   2 +++ b/drivers/watchdog/ar7_wdt.c        2009-01-25 01:19:15.000000000 +1300
   3 @@ -293,12 +293,26 @@
   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         ar7_wdt_get_regs();
  16
  17 +       /* arch/mips/ar7/clocks.c is the only other thing that reads this */
  18 +       bootcr = (u32 *)ioremap_nocache(AR7_REGS_DCL, 4);
  19 +       bootcr_value = *bootcr;
  20 +       iounmap(bootcr);
  21 +
  22 +       if (!(bootcr_value & AR7_WDT_HARDWARE_ENABLE)) {
  23 +               printk(KERN_INFO DRVNAME ": watchdog disabled in hardware (bootcr=%#x)\n", bootcr_value);
  24 +               return -ENODEV;
  25 +       }
  26 +
  27         if (!request_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt),
  28                                                         LONGNAME)) {
  29                 printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");