[PATCH 02/16] firmware: arm_scmi: Extend perf protocol ops to get the name of a domain

[Ulf Hansson]

Similar to other protocol ops, it's useful for an scmi module driver to get
the name of a performance domain, hence let's make this available by adding
a new perf protocol callback. Note that, a user is being added from
subsequent changes.

Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>
---
 drivers/firmware/arm_scmi/perf.c | 10 ++++++++++
 include/linux/scmi_protocol.h    |  3 +++
 2 files changed, 13 insertions(+)

diff --git a/drivers/firmware/arm_scmi/perf.c b/drivers/firmware/arm_scmi/perf.c
index cf7f0de4d6db..5a6ed42bfb55 100644
--- a/drivers/firmware/arm_scmi/perf.c
+++ b/drivers/firmware/arm_scmi/perf.c
@@ -340,6 +340,15 @@ static int scmi_perf_num_domains_get(const struct scmi_protocol_handle *ph)
 	return pi->num_domains;
 }
 
+static const char *
+scmi_perf_name_get(const struct scmi_protocol_handle *ph, u32 domain)
+{
+	struct scmi_perf_info *pi = ph->get_priv(ph);
+	struct perf_dom_info *dom = pi->dom_info + domain;
+
+	return dom->name;
+}
+
 static int scmi_perf_mb_limits_set(const struct scmi_protocol_handle *ph,
 				   u32 domain, u32 max_perf, u32 min_perf)
 {
@@ -695,6 +704,7 @@ scmi_power_scale_get(const struct scmi_protocol_handle *ph)
 
 static const struct scmi_perf_proto_ops perf_proto_ops = {
 	.num_domains_get = scmi_perf_num_domains_get,
+	.name_get = scmi_perf_name_get,
 	.limits_set = scmi_perf_limits_set,
 	.limits_get = scmi_perf_limits_get,
 	.level_set = scmi_perf_level_set,
diff --git a/include/linux/scmi_protocol.h b/include/linux/scmi_protocol.h
index 4e42274a68b7..07152a0baee3 100644
--- a/include/linux/scmi_protocol.h
+++ b/include/linux/scmi_protocol.h
@@ -102,6 +102,7 @@ struct scmi_clk_proto_ops {
  *	by SCMI Performance Protocol
  *
  * @num_domains_get: gets the number of supported performance domains
+ * @name_get: gets the name of a performance domain
  * @limits_set: sets limits on the performance level of a domain
  * @limits_get: gets limits on the performance level of a domain
  * @level_set: sets the performance level of a domain
@@ -122,6 +123,8 @@ struct scmi_clk_proto_ops {
  */
 struct scmi_perf_proto_ops {
 	int (*num_domains_get)(const struct scmi_protocol_handle *ph);
+	const char *(*name_get)(const struct scmi_protocol_handle *ph,
+				u32 domain);
 	int (*limits_set)(const struct scmi_protocol_handle *ph, u32 domain,
 			  u32 max_perf, u32 min_perf);
 	int (*limits_get)(const struct scmi_protocol_handle *ph, u32 domain,
-- 
2.34.1