drivers/scmi-msg: support for clock protocol
Adds SCMI clock protocol support in the SCMI message drivers as
defined in SCMI specification v2.0 [1] for clock protocol messages.
Platform can provide one of the plat_scmi_clock_*() handler for the
supported operations set/get state/rate and others.
scmi_msg_get_clock_handler() sanitizes the message_id value
against any speculative use of clock ID as a index since by
SCMI specification, IDs are indices.
This implementation is based on the OP-TEE project implementation [2]
itself based on the SCP-firmware implementation [3] of the SCMI
protocol server side.
Link: [1] http://infocenter.arm.com/help/topic/com.arm.doc.den0056a/DEN0056A_System_Control_and_Management_Interface.pdf
Link: [2] https://github.com/OP-TEE/optee_os/commit/a7a9e3ba71dd908aafdc4c5ed9b29b15faa9692d
Link: [3] https://github.com/ARM-software/SCP-firmware.git
Change-Id: Ib56e096512042d4f7b9563d1e4181554eb8ed02c
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/drivers/st/scmi-msg/common.h b/drivers/st/scmi-msg/common.h
index 4777dbe..63b92aa 100644
--- a/drivers/st/scmi-msg/common.h
+++ b/drivers/st/scmi-msg/common.h
@@ -12,6 +12,7 @@
#include <string.h>
#include "base.h"
+#include "clock.h"
#define SCMI_VERSION 0x20000U
#define SCMI_IMPL_VERSION 0U
@@ -95,6 +96,13 @@
scmi_msg_handler_t scmi_msg_get_base_handler(struct scmi_msg *msg);
/*
+ * scmi_msg_get_clock_handler - Return a handler for a clock message
+ * @msg - message to process
+ * Return a function handler for the message or NULL
+ */
+scmi_msg_handler_t scmi_msg_get_clock_handler(struct scmi_msg *msg);
+
+/*
* Process Read, process and write response for input SCMI message
*
* @msg: SCMI message context