diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index 092b51cf9596e..9eb58df9124dd 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -782,18 +782,6 @@ static void scmi_perf_domain_init_fc(const struct scmi_protocol_handle *ph,
 	*p_fc = fc;
 }
 
-/* Device specific ops */
-static int scmi_dev_domain_id(struct device *dev)
-{
-	struct of_phandle_args clkspec;
-
-	if (of_parse_phandle_with_args(dev->of_node, "clocks", "#clock-cells",
-				       0, &clkspec))
-		return -EINVAL;
-
-	return clkspec.args[0];
-}
-
 static int scmi_dvfs_device_opps_add(const struct scmi_protocol_handle *ph,
 				     struct device *dev, u32 domain)
 {
@@ -959,7 +947,6 @@ static const struct scmi_perf_proto_ops perf_proto_ops = {
 	.limits_get = scmi_perf_limits_get,
 	.level_set = scmi_perf_level_set,
 	.level_get = scmi_perf_level_get,
-	.device_domain_id = scmi_dev_domain_id,
 	.transition_latency_get = scmi_dvfs_transition_latency_get,
 	.device_opps_add = scmi_dvfs_device_opps_add,
 	.freq_set = scmi_dvfs_freq_set,
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index 4e63766adc6f5..27bfa5a65b450 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -121,7 +121,6 @@ struct scmi_perf_domain_info {
  * @limits_get: gets limits on the performance level of a domain
  * @level_set: sets the performance level of a domain
  * @level_get: gets the performance level of a domain
- * @device_domain_id: gets the scmi domain id for a given device
  * @transition_latency_get: gets the DVFS transition latency for a given device
  * @device_opps_add: adds all the OPPs for a given device
  * @freq_set: sets the frequency for a given device using sustained frequency
@@ -147,7 +146,6 @@ struct scmi_perf_proto_ops {
 			 u32 level, bool poll);
 	int (*level_get)(const struct scmi_protocol_handle *ph, u32 domain,
 			 u32 *level, bool poll);
-	int (*device_domain_id)(struct device *dev);
 	int (*transition_latency_get)(const struct scmi_protocol_handle *ph,
 				      u32 domain);
 	int (*device_opps_add)(const struct scmi_protocol_handle *ph,