I am writing a simple driver with an irq for Dragonboard410c. Kernel was built from 2016.03 branch.
I am using gpio_request, gpio_direction_input, gpio_to_irq, and request_irq in my code, but I've got the following errors at run-time.
Unknown symbol gpiod_to_irq (err 0)
Unknown symbol gpio_free (err 0)
Unknown symbol gpiod_direction_input (err 0)
Unknown symbol gpio_to_desc (err 0)
Unknown symbol gpio_request (error 0)
I used GPIO_C (13) in my code.
I need your help.