Re: Suspens on Assabet

On Mon, Apr 22, 2002 at 11:55:34AM +0100, Russell King - ARM Linux wrote:
> On Mon, Apr 22, 2002 at 12:25:16PM +0200, Eric Benard / FREE wrote:
> > I'm working on suspend / resume on Assabet and found that when 
> > suspended, the Assabet still draws nearly 100 mA @ 5V which is quite huge !
> 
> Hope you're not using the Neponset as well.
> 
> I did do some work to fix some of the issues, but there are a small
> number left (eg, UCB reset line.)

Well, Russell, I got your hint now :)

Is a PM callback in assabet.c The Right Thing To Do, or where
should the platform-dependent GPIO/BCR/whatever PM code live?

I'd like to add a PM callback in linux/arch/arm/mach-sa1100/assabet.c
(and later in system3.c as well).

And about the UCB reset issue in the l3 code: IMHO only the first line should
be removed, thus:

--- l3-bit-sa1100.c.org Mon Apr 22 14:10:39 2002
+++ l3-bit-sa1100.c     Mon Apr 22 14:10:48 2002
@@ -250,8 +250,6 @@
                 * need to do this here so that we can communicate on
                 * the I2C/L3 buses.
                 */
-               ASSABET_BCR_set(ASSABET_BCR_CODEC_RST);
-               mdelay(1);
                ASSABET_BCR_clear(ASSABET_BCR_CODEC_RST);
                mdelay(1);
                ASSABET_BCR_set(ASSABET_BCR_CODEC_RST);

The UCB would then get a reset when the l3 module is inserted, though.
Maybe we need some sort of resource management there?


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