#What is intel serial io drivers
#What is intel serial io driver

Both primary and secondary interrupts are identified by global system interrupts (GSIs). Secondary interrupts are generated by the operating system in response to certain primary interrupts.

Primary interrupts are interrupts that are generated by hardware devices. In addition, GpioClx handles primary interrupts from the GPIO controller device and maps these interrupts to secondary interrupts, which are handled by peripheral device drivers.

#What is intel serial io driver

GpioClx manages the I/O queues for the GPIO controller, and thereby relieves the GPIO controller driver of this task. For example, to read data from or write data to a set of GPIO pins, GpioClx calls event callback functions such as CLIENT_ReadGpioPins and CLIENT_WriteGpioPins. GpioClx translates these I/O requests into simple hardware operations, which it performs by calling the event callback functions that are implemented by the GPIO controller driver.

#What is intel serial io drivers

GpioClx handles I/O requests from the drivers for peripheral devices that physically connect to GPIO pins. The GPIO controller driver directly accesses the hardware registers of the GPIO controller device. GpioClx calls event callback functions that are implemented by the GPIO controller driver. The GPIO controller driver calls driver support methods that are implemented by GpioClx. The GPIO controller driver and GpioClx communicate with each other through the GpioClx device-driver interface (DDI). The following diagram shows the GPIO controller driver and GpioClx.

Thus, the assignment of GPIO pins to peripheral devices can be described in the platform firmware. Connections between GPIO pins and peripheral devices are fixed and cannot be changed by the user (for example, by removing a peripheral device and replacing it with another device). Typically, a GPIO pin is dedicated to a peripheral device, and not shared by two or more devices. GPIO pins can be configured as data inputs, data outputs, or interrupt request inputs. These pins can be physically connected to peripheral devices. In addition, this driver cooperates with GpioClx to handle interrupt requests from GPIO pins that are configured as interrupt inputs.ДЄ GPIO controller device has some number of GPIO pins. The GPIO controller driver cooperates with GpioClx to handle I/O requests for groups of GPIO pins that are configured as data inputs and data outputs.

A GPIO controller driver is a KMDF driver that manages all hardware-specific operations for a GPIO controller. Hardware vendors supply drivers to control their GPIO controllers. Drivers for Peripheral Devices That Use GPIO Pins.This overview discusses the following topics: GpioClx, which is a system-supplied extension to the kernel-mode driver framework (KMDF), performs processing tasks that are common to members of the GPIO device class. Additionally, GpioClx provides driver support for peripheral devices that connect to GPIO pins. Starting with WindowsВ 8, the GPIO framework extension (GpioClx) simplifies the task of writing a driver for a GPIO controller device.