How to access SPI from kernel source

[lalabhaidesai]

Hello,

 I am using IMX6UL. We have access SPI from user-space using spidev and it is working fine. Now we wants to access SPI from the kernel(from reboot.c file) to give some data to attached slaves just before the kernel power off. So please guide me how to access SPI from this place. how to initialize , configure and send/receive data through SPI from reboot.c kernel file. We are using Linux kernel 4.1.15

Regards,

Lalabhai

[lalabhaidesai]

Hello Victor,

Thanks for your reply.

Can i use spidev driver from "reboot.c" kernel file and if yes then how? I am beginner and don't have much more knowledge in Linux so please help me.

Regards,

Lalabhai

[b36401]

To access it in kernel space you can write kernel application (kernel driver).
http://derekmolloy.ie/writing-a-linux-kernel-module-part-1-introduction/

Have a great day,
Victor

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