watchdog: watchdog_dev: Use device tree alias for naming watchdogs
authorJustin Chen <justinpopo6@gmail.com>
Wed, 2 Sep 2015 18:00:17 +0000 (11:00 -0700)
committerWim Van Sebroeck <wim@iguana.be>
Tue, 27 Oct 2015 15:49:57 +0000 (16:49 +0100)
commit9dd4e173f71d5ac6ea37f7dbf49af6e5cd44f9fb
treed1927b774e1801b91446b5158252605ba68c9dee
parent7a3629fe999028e09bc96ccb0c9e22e0a9cf2725
watchdog: watchdog_dev: Use device tree alias for naming watchdogs

Currently there is no way to easily differentiate multiple
watchdog devices. The watchdogs are named by the order they
are probed.
1st probed watchdog: /dev/watchdog0
2nd probed watchdog: /dev/watchdog1
...

This change uses the alias of the watchdog device node for
the name of the watchdog.
aliases {
    watchdog0 = "/...../...."
    watchdog3 = "/..../....."
    watchdog2 = "/..../....."
    ...
}

This will translate to...
/dev/watchdog0
/dev/watchdog3
/dev/watchdog2

v2
Assign alias number to id in watchdog_core instead of watchdog_dev.
If failed to get id, fallback to original ida_simple_get call.

Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
drivers/watchdog/watchdog_core.c