clk: scmi: register scmi clocks with CCF

Implements SCMI APIs to retrieve the number exposed SCMI clocks using
SCMI_PROTOCOL_ATTRIBUTES messages and the names of the clocks using
SCMI_CLOCK_ATTRIBUTES messages.

This change updates sandbox SCMI clock test driver to manage these
2 new message IDs.

Cc: Lukasz Majewski <lukma@denx.de>
Cc: Sean Anderson <seanga2@gmail.com>
Cc: Clement Leger <clement.leger@bootlin.com>
Cc: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

1 files changed, 43 insertions, 0 deletions

diff --git a/include/scmi_protocols.h b/include/scmi_protocols.h
index ef26e721762..a220cb2a91a 100644
--- a/include/scmi_protocols.h
+++ b/include/scmi_protocols.h
@@ -41,21 +41,64 @@ enum scmi_status_code {
 };
 
 /*
+ * Generic message IDs
+ */
+enum scmi_discovery_id {
+	SCMI_PROTOCOL_VERSION = 0x0,
+	SCMI_PROTOCOL_ATTRIBUTES = 0x1,
+	SCMI_PROTOCOL_MESSAGE_ATTRIBUTES = 0x2,
+};
+
+/*
  * SCMI Clock Protocol
  */
 
 enum scmi_clock_message_id {
+	SCMI_CLOCK_ATTRIBUTES = 0x3,
 	SCMI_CLOCK_RATE_SET = 0x5,
 	SCMI_CLOCK_RATE_GET = 0x6,
 	SCMI_CLOCK_CONFIG_SET = 0x7,
 };
 
+#define SCMI_CLK_PROTO_ATTR_COUNT_MASK	GENMASK(15, 0)
 #define SCMI_CLK_RATE_ASYNC_NOTIFY	BIT(0)
 #define SCMI_CLK_RATE_ASYNC_NORESP	(BIT(0) | BIT(1))
 #define SCMI_CLK_RATE_ROUND_DOWN	0
 #define SCMI_CLK_RATE_ROUND_UP		BIT(2)
 #define SCMI_CLK_RATE_ROUND_CLOSEST	BIT(3)
 
+#define SCMI_CLOCK_NAME_LENGTH_MAX 16
+
+/**
+ * struct scmi_clk_get_nb_out - Response for SCMI_PROTOCOL_ATTRIBUTES command
+ * @status:	SCMI command status
+ * @attributes:	Attributes of the clock protocol, mainly number of clocks exposed
+ */
+struct scmi_clk_protocol_attr_out {
+	s32 status;
+	u32 attributes;
+};
+
+/**
+ * struct scmi_clk_attribute_in - Message payload for SCMI_CLOCK_ATTRIBUTES command
+ * @clock_id:	SCMI clock ID
+ */
+struct scmi_clk_attribute_in {
+	u32 clock_id;
+};
+
+/**
+ * struct scmi_clk_get_nb_out - Response payload for SCMI_CLOCK_ATTRIBUTES command
+ * @status:	SCMI command status
+ * @attributes:	clock attributes
+ * @clock_name:	name of the clock
+ */
+struct scmi_clk_attribute_out {
+	s32 status;
+	u32 attributes;
+	char clock_name[SCMI_CLOCK_NAME_LENGTH_MAX];
+};
+
 /**
  * struct scmi_clk_state_in - Message payload for CLOCK_CONFIG_SET command
  * @clock_id:	SCMI clock ID