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-rw-r--r--src/soc/intel/broadwell/Kconfig9
-rw-r--r--src/soc/intel/broadwell/lpc.c2
2 files changed, 11 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/Kconfig b/src/soc/intel/broadwell/Kconfig
index 2d6176af6b..9be3b1dd1d 100644
--- a/src/soc/intel/broadwell/Kconfig
+++ b/src/soc/intel/broadwell/Kconfig
@@ -215,4 +215,13 @@ config CHIPSET_BOOTBLOCK_INCLUDE
string
default "soc/intel/broadwell/bootblock/timestamp.inc"
+config BROADWELL_POWER_OPTIMIZER
+ bool "Enable Power Optimizer"
+ default y if CHROMEOS
+ help
+ Enable the power optimizer for the High Speed I/O
+ Power Control (HSIOPC). This can break graphics
+ under Windows, but can improve battery life under
+ 'mostly idle' conditions.
+
endif
diff --git a/src/soc/intel/broadwell/lpc.c b/src/soc/intel/broadwell/lpc.c
index 7ec9b46708..40297d2006 100644
--- a/src/soc/intel/broadwell/lpc.c
+++ b/src/soc/intel/broadwell/lpc.c
@@ -260,6 +260,7 @@ static const struct reg_script pch_pm_init_script[] = {
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x33b4, 0x00007001),
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x3350, 0x022ddfff),
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x3354, 0x00000001),
+#if IS_ENABLED(CONFIG_BROADWELL_POWER_OPTIMIZER)
/* Power Optimizer */
REG_MMIO_OR32(RCBA_BASE_ADDRESS + 0x33d4, 0x08000000),
REG_MMIO_OR32(RCBA_BASE_ADDRESS + 0x33c8, 0x08000080),
@@ -271,6 +272,7 @@ static const struct reg_script pch_pm_init_script[] = {
REG_MMIO_WRITE32(RCBA_BASE_ADDRESS + 0x3a84, 0x00001005),
REG_MMIO_OR32(RCBA_BASE_ADDRESS + 0x33d4, 0x2fff2fb1),
REG_MMIO_OR32(RCBA_BASE_ADDRESS + 0x33c8, 0x00008000),
+#endif
REG_SCRIPT_END
};