> I'm working on the minnowmax board, and i want the gpio 84(GPIO_S5_4) to > be a wakeup source that can > wake up the system from S3 like the switch key does on board. > My yocto linux kernel version is 3.14.4. > I've referenced the doc named > "510858_BayTrail_I_SoC_External_Design_Spec_r1p0" and the kernel driver > code named pinctrl-baytrail.c. > The registers about gpio in baytrail are divided into kinds, IO access > registers and memory mapped access registers. > The pinctrl-baytrail.c just read/write memory mapped access register. > Seems like no corresponding bit in memory mapped access register can > enable the wake up function. > My operation is request gpio 84 first, then request a interrupt with > IRQF_TRIGGER_RISING, IRQF_TRIGGER_FALLING, IRQF_ONESHOT, IRQF_NO_SUSPEND. > And irq function works during kernel runtime, but can't wake the system up > from S3. > My question is how to use GPIO_S5 as a wake up source on minnowmax board? > Expect your help. > Thanks. > _______________________________________________ > elinux-MinnowBoard mailing list > [email protected] > http://lists.elinux.org/mailman/listinfo/elinux-minnowboard >
anybody has the experience or hint about this question? _______________________________________________ elinux-MinnowBoard mailing list [email protected] http://lists.elinux.org/mailman/listinfo/elinux-minnowboard
