Hi All, After reading some documents in Documentation/ and the Internet, I found there is an interface /proc/acpi/wakeup to set the wakeup devices on machines support ACPI. but my machine does not support ACPI, no /proc/acpi/wakeup there. my machine is FuLoong2F, which is loongson based machine, it does not support ACPI, but currently, I have made it support basic standby mode for it has a 'wait' mode(after setting it's frequency to ZERO) and can be waked up via an external interrupt. and here is the basic framework: 0. suspend: arch_suspend_disable_irqs(disable all interrupts) ... fuloong_pm_enter() ... arch_suspend_enable_irqs(enable all interrupts) 1. fuloong_pm_enter: setup_wakeup_interrupts() loongson_pm_enter(put loongson into 'wait' mode) 3. setup_wakeup_interrupts if the interrupt line is connected to loongson directly, no setup need to do, but if there is an interrupt line connected to loongson indirectly(i.e via i8259A), I need to get through the interrupt path via enable(un-mask) the interrupts in interrupt controller and resuming the devices earlier manually or enable the interrupt bit on the devices and even or set a flag of the device driver to tell the system not suspend this device. I have tried the first(resuming earlier) and second method(enable the interrupt bit) on the 8042 keyboard o YeeLoong(another loongson-based machine, a netbook, i8042 is connected to i8259A directly), it works well, but not tried the third method yet. I guess the /proc/acpi/wakeup based method in user-space should be something like this, but is there any relative method in kernel space? there are only USB interfaces on FuLoong2F machines, I guess it will be very hard to get through the interrupt path via the above two methods(I have tried to enable the USB interrupt in south bright, but not work), so, is there an easier method to do it? Thanks & Regards, Wu Zhangjin _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
