This is my workplace for practice the Linux driver.

---new_template It's a new template linux device driver, no real options to registers.

---dtsled It's a led device driver based on device-tree for imx6ull SOC.

---pinctrl_gpioSubSys It's a led device driver based on pinctrl and gpio sub system.

---pinctrl_beep It's modified from pinctrl_gpioSubSys.

---key It's modified from pinctrl_gpioSubSys with atomic operation.

---timer It's modified from pinctrl_gpioSubSys with linux kernel timer.

---irqkey There is atomic operation, kernel timer and interrupt for key.

---blockio Inherit from irqkey, and change the app poll to block read.

---noblockio Inherit from blockio, and change block read to nonblock poll.

---asyncnoti Inherit from noblockio, and add the asynchronous notifications.

---platform_ndt Platform driver without device tree.

---misc_driver misc char driver.

---interprocess_communication It's a directory about interprocess communication.
   |---1_pipe It's implement interprocess communication using pipe.
   |---2_named_pipe It's implement interprocess communication using named pipe.
   |---3_message_queue It's implement interprocess communication using message queue.
   |---4_shared_memory It's implement interprocess communication using shared memory.
   |---5_semaphore It's implement interprocess communication using semaphore.