watchdog: pretimeout: add pretimeout_available_governors attribute
The change adds an option to a user with CONFIG_WATCHDOG_SYSFS and CONFIG_WATCHDOG_PRETIMEOUT_GOV enabled to get information about all registered watchdog pretimeout governors by reading watchdog device attribute named "pretimeout_available_governors". Signed-off-by: NVladimir Zapolskiy <vladimir_zapolskiy@mentor.com> Reviewed-by: NGuenter Roeck <linux@roeck-us.net> Reviewed-by: NWolfram Sang <wsa+renesas@sang-engineering.com> Tested-by: NWolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: NGuenter Roeck <linux@roeck-us.net> Signed-off-by: NWim Van Sebroeck <wim@iguana.be>
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