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sonic-buildimage/platform/pddf/README.md
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Platform Driver Developement Framework (PDDF) (#4756) 
This change introduces PDDF which is described here: https://github.com/Azure/SONiC/pull/536

Most of the platform bring up effort goes in developing the platform device drivers, SONiC platform APIs and validating them. Typically each platform vendor writes their own drivers and platform APIs which is very tailor made to that platform. This involves writing code, building, installing it on the target platform devices and testing. Many of the details of the platform are hard coded into these drivers, from the HW spec. They go through this cycle repetitively till everything works fine, and is validated before upstreaming the code.
PDDF aims to make this platform driver and platform APIs development process much simpler by providing a data driven development framework. This is enabled by:

JSON descriptor files for platform data
Generic data-driven drivers for various devices
Generic SONiC platform APIs
Vendor specific extensions for customisation and extensibility

Signed-off-by: Fuzail Khan <fuzail.khan@broadcom.com>
2020-11-12 10:22:38 -08:00

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Platform Driver Development Framework (PDDF) is part of SONiC Platform Development Kit (PDK) which optimizes the platform developement.

SONiC PDDF (Platform driver development framework) supports the following HW devices on a given platform:

  • Fan
  • PSU
  • System EEPROM
  • CPLD
  • CPLDMUX
  • GPIO
  • Optic Transceivers
  • System LED control via CPLD
  • System Status Registers in CPLD
  • Temp Sensors

This folder for the PDDF consists of the following:

  • PDDF python utility scripts
  • Generic PDDF HW device drivers in kernel space