Top "Linux-device-driver" questions

Device drivers take on a special role in the Linux kernel.

Spidev do not write/read simultaneously using ioctl

I hope to find some help even if this issue might be more hardware than software related (we'll see). I'm …

c linux-device-driver embedded-linux powerpc spi
Notify gpio interrupt to user space from a kernel module

I have a code which detects GPIO interrupt in a kernel module. Now,I am looking for a mechanism to …

linux linux-kernel linux-device-driver embedded-linux gpio
What is DMA mapping and DMA engine in context of linux kernel?

What is DMA mapping and DMA engine in context of linux kernel? When DMA mapping API and DMA engine API …

linux linux-kernel linux-device-driver dma pci-e
ioctl (TUNSETIFF) : device or resource busy

I am unable to set TUN interface. Everywhere i searched and it says the device should be rooted. I am …

networking linux-device-driver vpn tun
Order of preference - printk() vs dev_dbg() vs netdev_dbg()

I recently ran a the scripts/checkpatch.pl script within the linux source tree and got this Warning: WARNING: Prefer …

linux kernel linux-device-driver kernel-module
Device tree driven kernel for raspberry pi

I'd like to boot the raspberry pi with a device-tree-driven linux kernel, is there anything special to do to do …

linux-kernel raspberry-pi linux-device-driver device-tree
New to Linux Kernel/Driver development

Recently, i began developing a driver of an embedded device running linux. Until now i have only read about linux …

linux linux-kernel kernel linux-device-driver
Linux driver access through sysfs

I'm making a small kernel module to provide user-space access to some kernel-mode only features of an ARMv7 chip (specifically, …

linux kernel driver linux-device-driver sysfs
How Devfs and dev file system differ

I read about devfs(known as device file system ) to facilitate device driver programming as mentioned in linux device drivers …

linux linux-device-driver device-driver kernel
From where platform device gets it name

I am reading about the Linux Device model which is built around buses,devices and drivers .I am able to …

linux-kernel linux-device-driver device-driver