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| author | Sven Schnelle <svens@stackframe.org> | 2011-10-23 16:35:01 +0200 |
|---|---|---|
| committer | Sven Schnelle <svens@stackframe.org> | 2011-10-25 19:20:34 +0200 |
| commit | 906f9ae784b8a593319c400cbcc5e555a29b4128 (patch) | |
| tree | 463270b06f0b8c73b36ec28290df3ece8ad8c224 | |
| parent | 54600970417fee0e87d3059f6e6ac0a59d829066 (diff) | |
| download | coreboot-906f9ae784b8a593319c400cbcc5e555a29b4128.tar.xz | |
i82801gx: Add setting for C4onC3 mode
If this bit is set, ich7 will enter C4 mode if possible instead of
C3. See ich7 specification (LPC controller, Power management control
registers) for more details.
Change-Id: I352cccdbc51ff6269f153a4542c7ee1df0c01d22
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/329
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
| -rw-r--r-- | src/southbridge/intel/i82801gx/chip.h | 2 | ||||
| -rw-r--r-- | src/southbridge/intel/i82801gx/lpc.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/src/southbridge/intel/i82801gx/chip.h b/src/southbridge/intel/i82801gx/chip.h index 4aea26e347..b775d39ee8 100644 --- a/src/southbridge/intel/i82801gx/chip.h +++ b/src/southbridge/intel/i82801gx/chip.h @@ -68,6 +68,8 @@ struct southbridge_intel_i82801gx_config { uint32_t ide_enable_primary; uint32_t ide_enable_secondary; uint32_t sata_ahci; + + int c4onc3_enable:1; }; extern struct chip_operations southbridge_intel_i82801gx_ops; diff --git a/src/southbridge/intel/i82801gx/lpc.c b/src/southbridge/intel/i82801gx/lpc.c index ab3c915532..c6b76d337a 100644 --- a/src/southbridge/intel/i82801gx/lpc.c +++ b/src/southbridge/intel/i82801gx/lpc.c @@ -243,6 +243,10 @@ static void i82801gx_power_options(device_t dev) reg16 |= (1 << 2); // CLKRUN_EN - Mobile/Ultra only reg16 |= (1 << 3); // Speedstep Enable - Mobile/Ultra only reg16 |= (1 << 5); // CPUSLP_EN Desktop only + + if (config->c4onc3_enable) + reg16 |= (1 << 7); + // another laptop wants this? // reg16 &= ~(1 << 10); // BIOS_PCI_EXP_EN - Desktop/Mobile only reg16 |= (1 << 10); // BIOS_PCI_EXP_EN - Desktop/Mobile only |