path: root/Documentation/hwmon
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authorHans de Goede <hdegoede@redhat.com>2012-03-18 13:05:08 +0100
committerGuenter Roeck <guenter.roeck@ericsson.com>2012-03-20 06:42:05 -0700
commit312869ec935ab3bb67b7ba641a7d11230555aff5 (patch)
treecce1f87f557373a95c3cf44b792532f42cee728f /Documentation/hwmon
parent840e191dba36f51ae52db8a93849191af9e89098 (diff)
hwmon: (sch56xx) Add support for the integrated watchdog (v2)
Add support for the watchdog integrated into the SMSC SCH5627 and SCH5636 superio-s. Since the watchdog is part of the hwmon logical device and thus shares ioports with it, the watchdog driver is integrated into the existing hwmon drivers for these. Note that this version of the watchdog support for sch56xx superio-s implements the watchdog chardev interface itself, rather then relying on the recently added watchdog core / watchdog_dev. This is done because currently some needed functionality is missing from watchdog_dev, as soon as this functionality is added (which is being discussed on the linux-watchdog mailinglist), I'll convert this driver over to using watchdog_dev. Signed-off-by: Hans de Goede <hdegoede@redhat.com> [guenter.roeck@ericsson.com: Added missing linux/slab.h include] Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Diffstat (limited to 'Documentation/hwmon')
2 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/hwmon/sch5627 b/Documentation/hwmon/sch5627
index 446a054e4912..0551d266c51c 100644
--- a/Documentation/hwmon/sch5627
+++ b/Documentation/hwmon/sch5627
@@ -16,6 +16,11 @@ Description
SMSC SCH5627 Super I/O chips include complete hardware monitoring
capabilities. They can monitor up to 5 voltages, 4 fans and 8 temperatures.
+The SMSC SCH5627 hardware monitoring part also contains an integrated
+watchdog. In order for this watchdog to function some motherboard specific
+initialization most be done by the BIOS, so if the watchdog is not enabled
+by the BIOS the sch5627 driver will not register a watchdog device.
The hardware monitoring part of the SMSC SCH5627 is accessed by talking
through an embedded microcontroller. An application note describing the
protocol for communicating with the microcontroller is available upon
diff --git a/Documentation/hwmon/sch5636 b/Documentation/hwmon/sch5636
index f83bd1c260f0..7b0a01da0717 100644
--- a/Documentation/hwmon/sch5636
+++ b/Documentation/hwmon/sch5636
@@ -26,6 +26,9 @@ temperatures. Note that the driver detects how many fan headers /
temperature sensors are actually implemented on the motherboard, so you will
likely see fewer temperature and fan inputs.
+The Fujitsu Theseus hwmon solution also contains an integrated watchdog.
+This watchdog is fully supported by the sch5636 driver.
An application note describing the Theseus' registers, as well as an
application note describing the protocol for communicating with the
microcontroller is available upon request. Please mail me if you want a copy.