On Fri, Apr 10, 2020 at 03:48:44PM -0500, Adam Honse wrote: > The AMD X370 and other AM4 chipsets (A/B/X 3/4/5 parts) and Threadripper equivalents have a secondary SMBus controller at I/O port address 0x0B20. This bus is used by several manufacturers to control motherboard RGB lighting via embedded controllers. I have been using this bus in my OpenRGB project to control the Aura RGB on many motherboards and ASRock also uses this bus for their Polychrome RGB controller. > > See this kernel bug report: https://bugzilla.kernel.org/show_bug.cgi?id=202587 > > I am not aware of any CZ-compatible platforms which do not have the second SMBus channel. All of AMD's AM4- and Threadripper- series chipsets that OpenRGB users have tested appear to have this secondary bus. I also noticed this secondary bus is present on older AMD platforms including my FM1 home server. > > Signed-off-by: Adam Honse <calcprogrammer1@xxxxxxxxx> > Reformatted the patch description, added Sebastians tags and applied to for-next, thanks!
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