Alexandre Courbot of NVIDIA who has been working on most of the open-source Nouveau enablement for newer Tegra SoCs along with the signed firmware support for the GTX 900 series is the one responsible for this latest patch series.
The set of 16 patches out this morning is for adding a basic clock driver for the GM20B, a.k.a. the Maxwell GPU on the Tegra X1. The patch series explains:
This series does some refactoring in the GK20A's volt and clk drivers (fixing a few things while we are at it) to let GM20B benefit from the GK20A's logic with which it is compatible.The GM20B volt driver is based on the GK20A code as is the new GM20B clock driver. Hopefully this code can still get pulled in for Linux 4.6, but only coming at a later date will be the proper re-clocking support.
GM20B is capable of more sophisticated (and power-efficient) reclocking which will follow later. Even after this more fancy reclocking is merged, the present logic will remain used in the lowest speed of Tegra X1.