SYSCTL_SYSETH
clkdev_add_sys("1d810000.gpio", SYSCTL_SYSETH, ACTS_P0);
clkdev_add_sys("1d810100.gpio", SYSCTL_SYSETH, ACTS_P2);
clkdev_add_sys("1db01000.pad", SYSCTL_SYSETH, ACTS_PADCTRL0);
clkdev_add_sys("1db02000.pad", SYSCTL_SYSETH, ACTS_PADCTRL2);