On Tue, Jan 27, 2009 at 4:49 PM, Vasily Khoruzhick anarsoul@gmail.com wrote:
On Tuesday 27 January 2009 17:25:57 Mark Brown wrote:
On Tue, Jan 27, 2009 at 05:19:53PM +0200, Vasily Khoruzhick wrote:
Uh-oh, I didn't thought that it will be so complicated to decide when turn one gpio line to 0 or 1 :) Btw, I'm thinking about using own write- and read- wrappers for uda1380, in this way I can check on each read/write whether codec power is enabled.
Are you really cutting all power to the codec or just the analogue supplies? Normally the digital is powered off a separate supply shared with other bits of the system.
Yep, I'm really cutting all power to the codec. AFAIR it saves ~10-15mA of current consumption.
Could you show the code? On magician I'm just powering up uda1380 when the driver is loaded, but I wouldn't mind saving some power :) There are two GPIOs involved - one connected to the uda1380's RESET line and one to control the power. The last one doesn't have anything to do with uda1380, really. It's an external power switch in a PMIC (or CPLD, on magican) so it would be nice if this code could live in the machine specific drivers.
regards Philipp