General Purpose I/O Driver for Hard Processor System¶
Last updated: November 01, 2024
Upstream Status: Upstreamed
Devices supported: Agilex 5, Agilex 7
Introduction¶
The Hard Processor System (HPS) provides two General-Purpose I/O (GPIO) interface modules.
The GPIO interface supports Digital debounce, configurable interrupt mode, and has up to 48 dedicated I/O pins. For more information please refer to the Agilex 5 Hard Processor System Technical Reference Manual.
The figure below shows a block diagram of the GPIO interface:
Driver Sources¶
The source code for this driver can be found at https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpio/gpio-dwapb.c.
Driver Capabilities¶
- GPIO muxed between I2C and SPI.
- Interrupt propagation between the device and logic on board.
- Control other circuitry on board.
- Digital debounce.
- Configurable interrupt mode.
Kernel Configurations¶
CONFIG_GPIO_DWAPB
Device Tree¶
Example Device tree location:
Known Issues¶
None known
Notices & Disclaimers¶
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Created: May 25, 2024