Google pushed out a patch-set on Friday for enabling mainline Linux kernel support for more of the devices found on modern Chrome OS notebooks.
Benson Leung, a Google software engineer, published four more "chromeos_laptop" patches for bettering off the mainline kernel's support for Chrome OS hardware.
The published work includes the Cypress APA Smbus Trackpad for the Acer C7 Chromebook, the Taos tsl2563 light sensor on the Acer AC700, the Taos tsl2583 light sensor on the Samsung Series 5 Chromebook, and the Taos tsl2563 light sensor on the Cr-48 Chromebook.
The platform patches for the Linux kernel can be found in this mailing list thread
and will be presumably merged for the Linux 3.9 kernel.