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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>
This commit is contained in:
Sven Schnelle 2011-10-23 16:35:01 +02:00
parent 5460097041
commit 906f9ae784
2 changed files with 6 additions and 0 deletions
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2
src/southbridge/intel/i82801gx/chip.h
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@ -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;

4
src/southbridge/intel/i82801gx/lpc.c
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@ -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