#9385 NORM 1.5-BTe: WLAN and Disk LEDs blink when suspending/resuming

[Zarro Boogs per Child]

#9385: WLAN and Disk LEDs blink when suspending/resuming
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 Reporter:  wad                  |                 Owner:  wmb at firmworks.com
     Type:  enhancement          |                Status:  new              
 Priority:  normal               |             Milestone:  1.5-BTest        
Component:  ofw - open firmware  |               Version:  1.5-A1           
 Keywords:                       |           Next_action:  code             
 Verified:  0                    |   Deployment_affected:                   
Blockedby:                       |              Blocking:                   
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 On an XO-1.5 A1 prototype, the WLAN and Disk activity (previously disk
 flashes on and off (in rough synchrony with the power supply LEDs) as the
 system suspends and resumes using Open Firmware's rtc_wackup command.
 This is rather annoying if it happens under Linux as well.

 The WLAN LED is currently driven by a GPIO pin, which is powered by the
 +3.3v supply (turned off in suspend).  The signal is active high --- when
 it is turned off, the LED is turned off.  This GPIO pin should probably be
 set to off early in the OFW boot/resume process.

 The Disk activity light on the A1 prototypes is actually driven directly
 by the Phison disk controller, but in B1 and later prototypes using SD
 storage it will be controlled by the SD driver
 through the GPIO pin (hopefully!)  Hence is is grouped with the WLAN
 signal as one that should be initialized very early in the boot sequence.

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Ticket URL: <http://dev.laptop.org/ticket/9385>
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