Tool/software: Linux
Hello,
We have a requirement to use NMIN line as interrupt from a peripheral to A15-MPCore. we understood that NMI can be routed to A15-MPCore by configuring the register CTRL_CORE_NMI_DESTINATION_2.
After this we can handle interrupt as MPU_IRQ_133.
Kindly let us know how this IRQ can be configured using request_irq() Linux api and any other step is needed to achieve the same.
Hi Vikram,
The signal from the nmin_dsp pin (D21) can also be mapped to the MPU_INTC (MPU_IRQ_133 input) but it would be treated by Cortex-A15 as a general interrupt and not as a non-maskable interrupt. The Cortex-A15 processor does not provide NMI input. See DRA74x TRM, 17.2 Interrupt Controllers Environment
You can try with request_irq(), refer to the below wiki pages and links for examples:
processors.wiki.ti.com/.../Linux_PSP_GPIO_Driver_Guide
processors.wiki.ti.com/.../AM335x_Power_Management_Standby_User's_Guide
processors.wiki.ti.com/.../Test_PCI_Driver
linux-kernel/Documentation/input/input-programming.txt
Regards,
Pavel
