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-rw-r--r--src/soc/intel/cannonlake/fsp_params.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/src/soc/intel/cannonlake/fsp_params.c b/src/soc/intel/cannonlake/fsp_params.c
index e3a2310d5c..77d82d64f8 100644
--- a/src/soc/intel/cannonlake/fsp_params.c
+++ b/src/soc/intel/cannonlake/fsp_params.c
@@ -40,22 +40,28 @@ static const int serial_io_dev[] = {
PCH_DEVFN_UART2
};
+/*
+ * Given an enum for PCH_SERIAL_IO_MODE, 1 needs to be subtracted to get the FSP
+ * UPD expected value for Serial IO since valid enum index starts from 1.
+ */
+#define PCH_SERIAL_IO_INDEX(x) ((x) - 1)
+
static uint8_t get_param_value(const config_t *config, uint32_t dev_offset)
{
struct device *dev;
dev = dev_find_slot(0, serial_io_dev[dev_offset]);
if (!dev || !dev->enabled)
- return PchSerialIoDisabled;
+ return PCH_SERIAL_IO_INDEX(PchSerialIoDisabled);
if ((config->SerialIoDevMode[dev_offset] >= PchSerialIoMax) ||
(config->SerialIoDevMode[dev_offset] == PchSerialIoNotInitialized))
- return PchSerialIoPci;
+ return PCH_SERIAL_IO_INDEX(PchSerialIoPci);
/*
* Correct Enum index starts from 1, so subtract 1 while returning value
*/
- return config->SerialIoDevMode[dev_offset] - 1;
+ return PCH_SERIAL_IO_INDEX(config->SerialIoDevMode[dev_offset]);
}
#if IS_ENABLED(CONFIG_SOC_INTEL_COMETLAKE)