bluetooth powerup

Andy Green andy at openmoko.com
Wed Aug 20 12:07:47 CEST 2008


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Somebody in the thread at some point said:
| The software stack I am working with assumes:
|
| 1) That the powerup of bluetooth is "1" and powerdown is "0".
| 2) That reading back the value corresponds to the value, not opposite.
| 3) No reset required.

I can see we will break existing userspace assumptions if I apply this.

I think it's better to do it your way, but how about you add a second
sysfs node that has your semantics instead of changing behaviour of
current one?  Leave them both active.

| The following patch does this. Plus I was wondering if there is
| something else on LDO4. Can that regulator be reduced when not powering
| bt? Is there any power savings doing so? I've knocked it down to 0 when
| turning off and haven't seen any problems so far.

It won't make trouble.

- -Andy

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