2 * This file is part of the coreboot project.
4 * Copyright (c) 2011 Sven Schnelle <svens@stackframe.org>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; version 2 of
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
26 Name (_ADR, 0x00020001)
27 OperationRegion (DSPC, PCI_Config, 0x00, 0x100)
28 Field (DSPC, ByteAcc, NoLock, Preserve)
34 Method(BRTD, 0, NotSerialized)
36 Trap(SMI_BRIGHTNESS_DOWN)
38 if (LGreater (Local0, 15))
40 Subtract(Local0, 16, Local0)
45 Method(BRTU, 0, NotSerialized)
47 Trap(SMI_BRIGHTNESS_UP)
49 if (LLess(Local0, 0xff))
51 Add (Local0, 16, Local0)