Messages in this thread | | | Date | Fri, 04 Jan 2008 08:09:33 -0800 | From | David Brownell <> | Subject | Re: [linux-pm][PATCH] base: Change power/wakeup output from "" to "unsupported" if wakeup feature isn't supported by a device |
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> > This patch changes empty output to "unsupported" in order that a user knows > > wakeup feature isn't supported by this device when he/she > > 'cat /sys/devices/.../power/wakeup', please consider to apply, > > thanks. > > What about simply removing "wakuep" file if wakeup is not supported?
It may not *stay* unsupported, so I think changing it in either of those permanent ways would be confusing/misleading.
For example, USB devices have multiple states ... minimally, an unconfigured state, and a configured state. Some have multiple configurations. Only configured states can be wakeup-capable. So a given device might have three states, but support wakeup except in one of them...
- Dave
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