HelenOS sources

AR9271_PHY_ACTIVE  263 uspace/drv/nic/ar9271/hw.c 	wmi_reg_write(ar9271->htc_device, AR9271_PHY_ACTIVE, 1);
AR9271_PHY_ACTIVE  545 uspace/drv/nic/ar9271/hw.c 	wmi_reg_write(ar9271->htc_device, AR9271_PHY_ACTIVE, 0);
HelenOS homepage, sources at GitHub