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-rw-r--r--src/mainboard/amd/gardenia/BiosCallOuts.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/src/mainboard/amd/gardenia/BiosCallOuts.c b/src/mainboard/amd/gardenia/BiosCallOuts.c
index 31681cbe27..1d06411790 100644
--- a/src/mainboard/amd/gardenia/BiosCallOuts.c
+++ b/src/mainboard/amd/gardenia/BiosCallOuts.c
@@ -19,6 +19,29 @@
#include <soc/imc.h>
#include <soc/southbridge.h>
#include <stdlib.h>
+#include <string.h>
+
+/* Hardware Monitor Fan Control
+ * Hardware limitation:
+ * HWM will fail to read the input temperature via I2C if other
+ * software switches the I2C address. AMD recommends using IMC
+ * to control fans, instead of HWM.
+ */
+static void oem_fan_control(FCH_DATA_BLOCK *FchParams)
+{
+ /* Enable IMC fan control. the recommand way */
+ imc_reg_init();
+
+ FchParams->Imc.ImcEnable = TRUE;
+
+ /* 1 IMC, 0 HWM */
+ FchParams->Hwm.HwmControl = 1;
+
+ /* 2 disable IMC, 1 enable IMC, 0 following hw strap setting */
+ FchParams->Imc.ImcEnableOverWrite = 1;
+
+ memset(&FchParams->Imc.EcStruct, 0, sizeof(FCH_EC));
+}
static AGESA_STATUS fch_initenv(UINT32 Func, UINTN FchData, VOID *ConfigPtr)
{