USB Type-C Port Manager Promoted Out Of Staging For Linux 4.15
Written by Michael Larabel in Linux Kernel on 13 November 2017 at 01:30 PM EST. 1 Comment
LINUX KERNEL --
The USB Type-C port manager that originally premiered in Linux 4.12 will be promoted out of staging with the Linux 4.15 kernel.

Greg Kroah-Hartman sent in the pull requests today for the various kernel subsystems he maintains. With the USB updates alongside various small updates throughout the subsystem, the Type-C manager code was promoted out of staging.

Guenter Roeck proposed the change some weeks back with this TCPM Type-C Port Manager code being ready to move out of staging. The TCPM code provides a USB power delivery and state machine for Type-C port controllers with both source and sink port support -- basically the TCPM code manages each port's role with this newer USB standard.

Lower-level Linux USB controller drivers make use of this TCPM state machine and then use it for setting the current limit, power delivery messaging, activating/deactivating various features, etc.

Meanwhile, the staging pull for Linux 4.15 comes with a variety of clean-ups and other smaller changes to the existing drivers/functionality within this area of the Linux kernel but no notable driver additions this cycle.

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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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