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watchdog: Add tegra watchdog

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Add a driver for the hardware watchdogs in NVIDIA Tegra SoCs (Tegra30 and
later).  This driver will configure one watchdog timer that will reset the
system in the case of a watchdog timeout.

This driver binds to the nvidia,tegra30-timer device node and gets its
register base from there.

Signed-off-by: Andrew Chew <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Tested-by: Stephen Warren <[email protected]>
Reviewed-by: Stephen Warren <[email protected]>
Signed-off-by: Wim Van Sebroeck <[email protected]>
This commit is contained in:
Andrew Chew 2014-02-14 12:03:05 -08:00 • committed by Wim Van Sebroeck
commit c33a15974c
4 changed files with 319 additions and 0 deletions
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5
Documentation/watchdog/watchdog-parameters.txt
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@ -325,6 +325,11 @@ soft_noboot: Softdog action, set to 1 to ignore reboots, 0 to reboot
stmp3xxx_wdt:
heartbeat: Watchdog heartbeat period in seconds from 1 to 4194304, default 19
-------------------------------------------------
tegra_wdt:
heartbeat: Watchdog heartbeats in seconds. (default = 120)
nowayout: Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
ts72xx_wdt:
timeout: Watchdog timeout in seconds. (1 <= timeout <= 8, default=8)
nowayout: Disable watchdog shutdown on close