Emulating Devices in Linux Using Greybus Subsystem
Talkat Open Source Summit Europe 2023 · on Thursday, 2023-09-21· at 12:50· Room 0E-2 (Floor 0), Abandoibarra Etorb., 4, 48011 Bilbao, Bizkaia, Spain·
summary
Greybus subsystem exposes a way to emulate Linux devices so the kernel sees real drivers probing and interacting without hardware: the demo uses a BeagleBoard host over TCP transport to emulate an I2C light sensor (opt30) and a USB HID device, implements user-space handlers in Python tied to libgpiod + iio tools, and shows successful driver probe and live readings. The method supports record/playback, unit tests and CI for thousands of drivers and reuses native POSIX target firmware where available.
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chapters (12)
- 0:00Greybus and device emulation
- 1:06Emulate devices in kernel
- 4:00Device emulation methods
- 6:06Greybus architecture
- 10:24Greybus in IoT
- 13:40Emulate devices with Greybus
- 15:44Greybus emulation operations
- 17:33Virtual GPIO controller
- 19:27I2C controller emulation
- 24:07Greybus for complex emulation
- 25:53Reuse Greybus firmware
- 26:14Q&A
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