Intel SCU Watchdog Timer Driver for Moorestown and Medfield platforms.

From: Donald Johnson <[email protected]>

This submission includes:
- Fix to intel_scu_write() to start watchdog timer the on the first write, and refresh on subsequent writes.
This enables Open, write, write, ... usage model.
- Moves boot parameter checks from intel_scu_open() to intel_scu_watchdog_init(), so driver init will fail if these parameters are out of bounds.
- Adds check for whether process waiting in wait_event_interruptible() received a signal while it was waiting.
- Other small error handling changes.

Removed the read() method for now as that wass a non-standard behaviour.

---

 drivers/watchdog/Kconfig              |   10 +
 drivers/watchdog/Makefile             |    1 
 drivers/watchdog/intel_scu_watchdog.c |  573 +++++++++++++++++++++++++++++++++
 drivers/watchdog/intel_scu_watchdog.h |   66 ++++
 4 files changed, 650 insertions(+), 0 deletions(-)
 create mode 100644 drivers/watchdog/intel_scu_watchdog.c
 create mode 100644 drivers/watchdog/intel_scu_watchdog.h

index bd6a33d..cf2235b 100644
@@ -533,6 +533,16 @@ config I6300ESB_WDT
 	  To compile this driver as a module, choose M here: the
 	  module will be called i6300esb.
 
+config INTEL_SCU_WATCHDOG
+	bool "Intel SCU Watchdog for Mobile Platforms"
+	depends on WATCHDOG
+	depends on INTEL_SCU_IPC
+	---help---
+	  Hardware driver for the watchdog time built into the Intel SCU
+	  for Intel Mobile Platforms.
+
+	  To compile this driver as a module, choose M here.
+
 config ITCO_WDT
 	tristate "Intel TCO Timer/Watchdog"
 	depends on (X86 || IA64) && PCI

index fd9c8c0..b037f3d 100644
@@ -102,6 +102,7 @@ obj-$(CONFIG_W83877F_WDT) += w83877f_wdt.o
 obj-$(CONFIG_W83977F_WDT) += w83977f_wdt.o
 obj-$(CONFIG_MACHZ_WDT) += machzwd.o
 obj-$(CONFIG_SBC_EPX_C3_WATCHDOG) += sbc_epx_c3.o
+obj-$(CONFIG_INTEL_SCU_WATCHDOG) += intel_scu_watchdog.o
 
 # M32R Architecture