diff options
Diffstat (limited to 'Documentation/watchdog')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 4 | ||||
| -rw-r--r-- | Documentation/watchdog/watchdog-pm.txt | 19 |
2 files changed, 19 insertions, 4 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt index 9b93953f69cf..3a91ef5af044 100644 --- a/Documentation/watchdog/watchdog-kernel-api.txt +++ b/Documentation/watchdog/watchdog-kernel-api.txt @@ -128,8 +128,6 @@ struct watchdog_ops { int (*set_pretimeout)(struct watchdog_device *, unsigned int); unsigned int (*get_timeleft)(struct watchdog_device *); int (*restart)(struct watchdog_device *); - void (*ref)(struct watchdog_device *) __deprecated; - void (*unref)(struct watchdog_device *) __deprecated; long (*ioctl)(struct watchdog_device *, unsigned int, unsigned long); }; @@ -218,8 +216,6 @@ they are supported. These optional routines/operations are: if a command is not supported. The parameters that are passed to the ioctl call are: watchdog_device, cmd and arg. -The 'ref' and 'unref' operations are no longer used and deprecated. - The status bits should (preferably) be set with the set_bit and clear_bit alike bit-operations. The status bits that are defined are: * WDOG_ACTIVE: this status bit indicates whether or not a watchdog timer device diff --git a/Documentation/watchdog/watchdog-pm.txt b/Documentation/watchdog/watchdog-pm.txt new file mode 100644 index 000000000000..7a4dd46e0d24 --- /dev/null +++ b/Documentation/watchdog/watchdog-pm.txt @@ -0,0 +1,19 @@ +The Linux WatchDog Timer Power Management Guide +=============================================== +Last reviewed: 17-Dec-2018 + +Wolfram Sang <wsa+renesas@sang-engineering.com> + +Introduction +------------ +This document states rules about watchdog devices and their power management +handling to ensure a uniform behaviour for Linux systems. + + +Ping on resume +-------------- +On resume, a watchdog timer shall be reset to its selected value to give +userspace enough time to resume. [1] [2] + +[1] https://patchwork.kernel.org/patch/10252209/ +[2] https://patchwork.kernel.org/patch/10711625/ |