diff options
Diffstat (limited to 'src/mainboard/lenovo/t60/acpi/video.asl')
-rw-r--r-- | src/mainboard/lenovo/t60/acpi/video.asl | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/mainboard/lenovo/t60/acpi/video.asl b/src/mainboard/lenovo/t60/acpi/video.asl new file mode 100644 index 0000000000..c2f9dfb459 --- /dev/null +++ b/src/mainboard/lenovo/t60/acpi/video.asl @@ -0,0 +1,51 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (c) 2011 Sven Schnelle <svens@stackframe.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; version 2 of + * the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, + * MA 02110-1301 USA + */ + +Device (DSPC) +{ + Name (_ADR, 0x00020001) + OperationRegion (DSPC, PCI_Config, 0x00, 0x100) + Field (DSPC, ByteAcc, NoLock, Preserve) + { + Offset (0xf4), + BRTC, 8 + } + + Method(BRTD, 0, NotSerialized) + { + Store(BRTC, Local0) + if (LGreater (Local0, 15)) + { + Subtract(Local0, 16, Local0) + Store(Local0, BRTC) + } + } + + Method(BRTU, 0, NotSerialized) + { + Store (BRTC, Local0) + if (LLess(Local0, 0xff)) + { + Add (Local0, 16, Local0) + Store(Local0, BRTC) + } + } +} |