diff options
Diffstat (limited to 'Documentation/watchdog/watchdog-kernel-api.txt')
| -rw-r--r-- | Documentation/watchdog/watchdog-kernel-api.txt | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/watchdog/watchdog-kernel-api.txt b/Documentation/watchdog/watchdog-kernel-api.txt index 9e162465b0cf..7d9d1da762b6 100644 --- a/Documentation/watchdog/watchdog-kernel-api.txt +++ b/Documentation/watchdog/watchdog-kernel-api.txt | |||
| @@ -117,9 +117,10 @@ they are supported. These optional routines/operations are: | |||
| 117 | status of the device is reported with watchdog WDIOF_* status flags/bits. | 117 | status of the device is reported with watchdog WDIOF_* status flags/bits. |
| 118 | * set_timeout: this routine checks and changes the timeout of the watchdog | 118 | * set_timeout: this routine checks and changes the timeout of the watchdog |
| 119 | timer device. It returns 0 on success, -EINVAL for "parameter out of range" | 119 | timer device. It returns 0 on success, -EINVAL for "parameter out of range" |
| 120 | and -EIO for "could not write value to the watchdog". On success the timeout | 120 | and -EIO for "could not write value to the watchdog". On success this |
| 121 | value of the watchdog_device will be changed to the value that was just used | 121 | routine should set the timeout value of the watchdog_device to the |
| 122 | to re-program the watchdog timer device. | 122 | achieved timeout value (which may be different from the requested one |
| 123 | because the watchdog does not necessarily has a 1 second resolution). | ||
| 123 | (Note: the WDIOF_SETTIMEOUT needs to be set in the options field of the | 124 | (Note: the WDIOF_SETTIMEOUT needs to be set in the options field of the |
| 124 | watchdog's info structure). | 125 | watchdog's info structure). |
| 125 | * ioctl: if this routine is present then it will be called first before we do | 126 | * ioctl: if this routine is present then it will be called first before we do |