Embedded Linux project - finding supported peripherals
Actually searching the source for a string is a feasible way - Linux on ARM uses device tree and that needs a compatible string. Run grep -Rni device in the root source directory and look through the results. For example look at line 1283 of sc16is7xx.c - there is a table listing all supported devices.

If a full name doesnt come up try removing the last character or two - thats up to your discretion since it depends on the particular device and the naming scheme of that device family.