kernel configs for getting system wake up from GSM modem

[matt_hsu]

Hi Werner,

After Allen's rework, GSM modem can get into deep sleep. But the
incoming GSM call could not wake GTA02 up. Interestingly, when I set the
kernel config on DEBUG_S3C_UART as 2 (the original one is 0) to dump
some debug message at the last monent, the waking up from GSM call can
work. Now, the suspending GSM issue looks good. We have suspending
current of 4~5mA for GSM modem and 7~8mA for system respectively. Most
important, incoming call can wake GTA02 up.  
  
So, the kernel config of DEBUG_S3C_UART should be set as 2 instead of 0.
This would affect GSM module behavior when it's in suspend. When GTA02
is in suspend, if you set this config as 0, the GSM modem could not
issue interrupt to S3C2442 even GSM modem itself is woked up already.


Cheers,

Matt