From: Aurelien Jarno <aurelien@aurel32.net>

Add a new function to control the watchdog.  It originally comes from the
OpenWrt patches.

Cc: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/ssb/driver_chipcommon.c           |    7 +++++++
 include/linux/ssb/ssb_driver_chipcommon.h |    3 +++
 2 files changed, 10 insertions(+)

diff -puN drivers/ssb/driver_chipcommon.c~watchdog-support-3 drivers/ssb/driver_chipcommon.c
--- a/drivers/ssb/driver_chipcommon.c~watchdog-support-3
+++ a/drivers/ssb/driver_chipcommon.c
@@ -312,6 +312,13 @@ void ssb_chipco_timing_init(struct ssb_c
 	}
 }
 
+/* Set chip watchdog reset timer to fire in 'ticks' backplane cycles */
+void
+ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc, u32 ticks)
+{
+	/* instant NMI */
+	chipco_write32(cc, SSB_CHIPCO_WATCHDOG, ticks);
+}
 
 #ifdef CONFIG_SSB_SERIAL
 int ssb_chipco_serial_init(struct ssb_chipcommon *cc,
diff -puN include/linux/ssb/ssb_driver_chipcommon.h~watchdog-support-3 include/linux/ssb/ssb_driver_chipcommon.h
--- a/include/linux/ssb/ssb_driver_chipcommon.h~watchdog-support-3
+++ a/include/linux/ssb/ssb_driver_chipcommon.h
@@ -377,6 +377,9 @@ enum ssb_clkmode {
 extern void ssb_chipco_set_clockmode(struct ssb_chipcommon *cc,
 				     enum ssb_clkmode mode);
 
+extern void ssb_chipco_watchdog_timer_set(struct ssb_chipcommon *cc,
+					  u32 ticks);
+
 #ifdef CONFIG_SSB_SERIAL
 extern int ssb_chipco_serial_init(struct ssb_chipcommon *cc,
 				  struct ssb_serial_port *ports);
_