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i82801gx: Add setting for C4onC3 mode

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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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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