WLAN and Disk LEDs blink when suspending/resuming
|Reported by:||wad||Owned by:||wmb@…|
|Component:||ofw - open firmware||Version:||1.5-A1|
|Deployments affected:||Action Needed:||code|
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.