On Mon, 24 Jan 2011 17:51:22 +0200 Jarkko Nikula <jhnikula@xxxxxxxxx> wrote: > OMAP can do also dynamic idling so wake-up enable register should be set > also while system is running. If UART_OMAP_WER is not set, then for instance > the RX activity cannot wake up the UART port that is sleeping. > > This RX wake-up feature was working when the 8250 driver was used instead > of omap-serial. Reason for this is that the 8250 doesn't set the > UART_OMAP_WER and then arch/arm/mach-omap2/pm34xx.c ends up saving and > restoring the reset default which is the same than value > OMAP_UART_WER_MOD_WKUP here. > > Fix this by moving the conditional UART_OMAP_WER write from serial_omap_pm > into serial_omap_startup where wake-up bits are set unconditionally. > > Signed-off-by: Jarkko Nikula <jhnikula@xxxxxxxxx> > Cc: Govindraj.R <govindraj.raja@xxxxxx> > --- > This problem has been here since 2.6.37 when the omap-serial was switched > into use so this patch is for 2.6.39. > --- For omap folks: 1. This patch is coming through tty tree http://git.kernel.org/?p=linux/kernel/git/gregkh/tty-2.6.git;a=commit;h=78841462d72fe7038cb7ea48adecc6fc395f2dc5 2. This patch helps those boards that don't have UART RTS signal (e.g. BeagleBoard) and thus padconf wakeup mechanism is not available. -- Jarkko -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
