Hi, L4 hackers
I am implementing a driver using GPIO input as interrupt. When setup handler for gpio, either from "irq_set_chained_handler()" or "requst_irq()" in kernel driver, it finally calls "l4lx_irq_io_startup()" function and return "/l4x-irq: Failed to set type for IRQ x".// / What this error means?
Right before this error, it called l4_icu_set_mode() which goes to l4 side, I tried to print out debug information in l4 side, but not very successful.
I tried read document about ICU and IRQ handling library about L4Re, but did not find the answer, maybe I overlook it. So I ask help here. Is there an guidance about this interrupt things or could some one please give me some advice.
Best Regards, -Yunchuan
On Tue Aug 26, 2014 at 23:04:41 +0300, Yunchuan Geng wrote:
I am implementing a driver using GPIO input as interrupt. When setup handler for gpio, either from "irq_set_chained_handler()" or "requst_irq()" in kernel driver, it finally calls "l4lx_irq_io_startup()" function and return "/l4x-irq: Failed to set type for IRQ x".// / What this error means?
Right before this error, it called l4_icu_set_mode() which goes to l4 side, I tried to print out debug information in l4 side, but not very successful.
I tried read document about ICU and IRQ handling library about L4Re, but did not find the answer, maybe I overlook it. So I ask help here. Is there an guidance about this interrupt things or could some one please give me some advice.
In the IO configuration you use for L4Linux, is the interrupt number for the GPIO controller listed? That is, is the GPIO controller working? And do I understand correctly that you are trying to use an interrupt for a specific GPIO pin?
Adam
l4-hackers@os.inf.tu-dresden.de
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Adam Lackorzynski -
Yunchuan Geng