Re: LED blinking during suspend

2009-12-18 Thread Mark Brown
On Thu, Dec 17, 2009 at 11:55:53PM +0100, Michael 'Mickey' Lauer wrote:
 Am Donnerstag, den 17.12.2009, 23:06 +0100 schrieb Michael Trimarchi:
  the android-kernel now has a lot of feature:

  - frequency scaling
  - FCSE from arm mailing list

  The result is an incredible performance on Android

 Congrats... anything in for us GNU/Linux weenies as well?

The S3C24xx CPU frequency scaling support is in mainline now.

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Re: LED blinking during suspend

2009-12-17 Thread Lars-Peter Clausen
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Timo Juhani Lindfors wrote:
 Lars-Peter Clausen l...@metafoo.de writes:
 Leds can either be on or off during suspend. Blinking is not
 possible.

 Really? Here with andy-tracking LEDs always turn off when I suspend


Yes, but that's a software limitation. I had leds on while the device
was suspended.

- - Lars
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Re: LED blinking during suspend

2009-12-17 Thread Michael 'Mickey' Lauer
Am Donnerstag, den 17.12.2009, 23:06 +0100 schrieb Michael Trimarchi:
 the android-kernel now has a lot of feature:
 
 - frequency scaling
 - FCSE from arm mailing list

 The result is an incredible performance on Android

Congrats... anything in for us GNU/Linux weenies as well?

Cheers,

-- 
:M:


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Re: LED blinking during suspend

2009-12-16 Thread Lars-Peter Clausen
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c_c wrote:
 Hi,
   Is it possible to blink the FR's LED's (red/orange/blue - any / either)
 while the phone is in suspend?
  I'm looking at this as a method to indicate to the user that some
 notification needs his attn (missed call/sms/task etc) while the phone is
 suspended.
   Can the vibrator / audio system be used while in suspend?
   Thanks.
Hi

Leds can either be on or off during suspend. Blinking is not possible.
Same with vibrator.

You can let the audio chip on during suspend. But since you won't be
able to send any audio data from the cpu it's not that useful, except
if you want to suspend the main cpu while having a phone conversation.

- - Lars
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Re: LED blinking during suspend

2009-12-16 Thread Dr. Michael Lauer
 Leds can either be on or off during suspend. Blinking is not possible.
 Same with vibrator.
 
 You can let the audio chip on during suspend. But since you won't be
 able to send any audio data from the cpu it's not that useful, except
 if you want to suspend the main cpu while having a phone conversation.

Speaking about that, have there been any improvement towards
no-idle-ticks and/or clock-changing for s3c24x0 in 2.6.31?

For some applications it'd be still very appealing to keep the CPU on, but with 
the least possible
clock frequency.

:M:



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Re: LED blinking during suspend

2009-12-16 Thread c_c

Hi,
   OK. Lets say there are pending notifications that the user needs to see.
If I set the LED light on, and suspend the phone - does it stay on
automatically - or do I need more magic?
  What about the current consumption? How badly would this affect battery
life? I'm looking at getting just enough information to decide whether this
is an idea worth pursuing or not.

Thanks.

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Re: LED blinking during suspend

2009-12-16 Thread Werner Almesberger
c_c wrote:
 If I set the LED light on, and suspend the phone - does it stay on
 automatically - or do I need more magic?

As far as the hardware is concerned, it will stay on.
I'm too lazy to check if the kernel will turn it off for you in
suspend :)

   What about the current consumption?

About 5 mA per LED. About 50 mA per LED if the LED has the base
resistor problem. Normal suspend current with GSM on should be
somewhere around 8 mA, maybe a bit less. So the LED would take a
considerable bite out of that,

From a usability point of view, I'm quite sceptical about this
idea of using a LED as a permanent indicator. LEDs are very
limited in the amount of information they can signal to a human
being, and if you have a lot of different states to signal, the
patterns may not be very intuitive.

I think it would be interesting to try to find a way for resuming
the display really quickly, so that one could just bring up the
screen, check the status indicators for any news, and then send
the device back to sleep.

- Werner

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Re: LED blinking during suspend

2009-12-16 Thread Lars-Peter Clausen
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Dr. Michael Lauer wrote:
 Leds can either be on or off during suspend. Blinking is not
 possible. Same with vibrator.

 You can let the audio chip on during suspend. But since you won't
 be able to send any audio data from the cpu it's not that useful,
 except if you want to suspend the main cpu while having a phone
 conversation.

 Speaking about that, have there been any improvement towards
 no-idle-ticks and/or clock-changing for s3c24x0 in 2.6.31?

 For some applications it'd be still very appealing to keep the CPU
 on, but with the least possible clock frequency.

 :M:



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Hi

Afaik Michael Trimarchi was working on it

- - Lars
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LED blinking during suspend

2009-12-15 Thread c_c

Hi,
  Is it possible to blink the FR's LED's (red/orange/blue - any / either)
while the phone is in suspend?
 I'm looking at this as a method to indicate to the user that some
notification needs his attn (missed call/sms/task etc) while the phone is
suspended.
  Can the vibrator / audio system be used while in suspend? 
  Thanks.
-- 
View this message in context: 
http://n2.nabble.com/LED-blinking-during-suspend-tp4174042p4174042.html
Sent from the Openmoko Hardware mailing list archive at Nabble.com.

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