[PATCH v1 4/4] Documentation/watchdog: Add description of new watchdog type 3

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From: Michael Shych <michaelsh@xxxxxxxxxxxx>

Add documentation with details of new type of Mellanox watchdog driver.

Signed-off-by: Michael Shych <michaelsh@xxxxxxxxxxxx>

Reviewed-by: Vadim Pasternak <vadimp@xxxxxxxxxxxx>
---
 Documentation/watchdog/mlx-wdt.rst | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/watchdog/mlx-wdt.rst b/Documentation/watchdog/mlx-wdt.rst
index bf5bafac47f0..fa0a94e5c82e 100644
--- a/Documentation/watchdog/mlx-wdt.rst
+++ b/Documentation/watchdog/mlx-wdt.rst
@@ -24,10 +24,19 @@ Type 2:
   Maximum timeout is 255 sec.
   Get time-left is supported.
 
+Type 3:
+  Same as Type 2 with extended maximum timeout period.
+  Maximum timeout is 65535 sec.
+
 Type 1 HW watchdog implementation exist in old systems and
 all new systems have type 2 HW watchdog.
 Two types of HW implementation have also different register map.
 
+Type 3 HW watchdog implementation can exist on all Mellanox systems
+with new programmer logic device.
+It's differentiated by WD capability bit.
+Old systems still have only one main watchdog.
+
 Mellanox system can have 2 watchdogs: main and auxiliary.
 Main and auxiliary watchdog devices can be enabled together
 on the same system.
-- 
2.11.0




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