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Diffstat (limited to 'target/linux/ar7/patches-2.6.27/140-watchdog_bootcr.patch')
-rw-r--r--target/linux/ar7/patches-2.6.27/140-watchdog_bootcr.patch29
1 files changed, 29 insertions, 0 deletions
diff --git a/target/linux/ar7/patches-2.6.27/140-watchdog_bootcr.patch b/target/linux/ar7/patches-2.6.27/140-watchdog_bootcr.patch
new file mode 100644
index 0000000000..95535def0c
--- /dev/null
+++ b/target/linux/ar7/patches-2.6.27/140-watchdog_bootcr.patch
@@ -0,0 +1,29 @@
+--- a/drivers/watchdog/ar7_wdt.c 2009-01-25 01:17:01.000000000 +1300
++++ b/drivers/watchdog/ar7_wdt.c 2009-01-25 01:19:15.000000000 +1300
+@@ -293,12 +293,26 @@
+ .fops = &ar7_wdt_fops,
+ };
+
++#define AR7_WDT_HARDWARE_ENABLE 0x10
++
+ static int __init ar7_wdt_init(void)
+ {
+ int rc;
++ u32 *bootcr;
++ u32 bootcr_value;
+
+ ar7_wdt_get_regs();
+
++ /* arch/mips/ar7/clocks.c is the only other thing that reads this */
++ bootcr = (u32 *)ioremap_nocache(AR7_REGS_DCL, 4);
++ bootcr_value = *bootcr;
++ iounmap(bootcr);
++
++ if (!(bootcr_value & AR7_WDT_HARDWARE_ENABLE)) {
++ printk(KERN_INFO DRVNAME ": watchdog disabled in hardware (bootcr=%#x)\n", bootcr_value);
++ return -ENODEV;
++ }
++
+ if (!request_mem_region(ar7_regs_wdt, sizeof(struct ar7_wdt),
+ LONGNAME)) {
+ printk(KERN_WARNING DRVNAME ": watchdog I/O region busy\n");