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Diffstat (limited to 'src/soc/amd/stoneyridge/southbridge.c')
-rw-r--r--src/soc/amd/stoneyridge/southbridge.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/src/soc/amd/stoneyridge/southbridge.c b/src/soc/amd/stoneyridge/southbridge.c
index 1b2afec3f1..b0aaf241cd 100644
--- a/src/soc/amd/stoneyridge/southbridge.c
+++ b/src/soc/amd/stoneyridge/southbridge.c
@@ -378,8 +378,11 @@ static void setup_misc(int *reboot)
static void fch_smbus_init(void)
{
+ /* 400 kHz smbus speed. */
+ const uint8_t smbus_speed = (66000000 / (400000 * 4));
+
pm_write8(SMB_ASF_IO_BASE, SMB_BASE_ADDR >> 8);
- smbus_write8(SMBTIMING, SMB_SPEED_400KHZ);
+ smbus_write8(SMBTIMING, smbus_speed);
/* Clear all SMBUS status bits */
smbus_write8(SMBHSTSTAT, SMBHST_STAT_CLEAR);
smbus_write8(SMBSLVSTAT, SMBSLV_STAT_CLEAR);