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authorSven Schnelle <svens@stackframe.org>2011-10-23 16:35:01 +0200
committerSven Schnelle <svens@stackframe.org>2011-10-25 19:20:34 +0200
commit906f9ae784b8a593319c400cbcc5e555a29b4128 (patch)
tree463270b06f0b8c73b36ec28290df3ece8ad8c224 /src
parent54600970417fee0e87d3059f6e6ac0a59d829066 (diff)
downloadcoreboot-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>
Diffstat (limited to 'src')
-rw-r--r--src/southbridge/intel/i82801gx/chip.h2
-rw-r--r--src/southbridge/intel/i82801gx/lpc.c4
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