From 55de62baa1119e8a88e9bfc78705ebff498b0e88 Mon Sep 17 00:00:00 2001
From: AKASHI Takahiro <takahiro.akashi@linaro.org>
Date: Wed, 11 Oct 2023 19:06:58 +0900
Subject: firmware: scmi: framework for installing additional protocols

This framework allows SCMI protocols to be installed and bound to the agent
so that the agent can manage and utilize them later.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
---
 include/scmi_agent-uclass.h | 15 ++++++++++++++-
 include/scmi_agent.h        | 14 ++++++++++++++
 2 files changed, 28 insertions(+), 1 deletion(-)

(limited to 'include')

diff --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h
index eee46c880a5..258aa0f3759 100644
--- a/include/scmi_agent-uclass.h
+++ b/include/scmi_agent-uclass.h
@@ -5,10 +5,23 @@
 #ifndef _SCMI_AGENT_UCLASS_H
 #define _SCMI_AGENT_UCLASS_H
 
-struct udevice;
+#include <dm/device.h>
+
 struct scmi_msg;
 struct scmi_channel;
 
+/**
+ * struct scmi_agent_priv - private data maintained by agent instance
+ * @clock_dev:		SCMI clock protocol device
+ * @resetdom_dev:	SCMI reset domain protocol device
+ * @voltagedom_dev:	SCMI voltage domain protocol device
+ */
+struct scmi_agent_priv {
+	struct udevice *clock_dev;
+	struct udevice *resetdom_dev;
+	struct udevice *voltagedom_dev;
+};
+
 /**
  * struct scmi_transport_ops - The functions that a SCMI transport layer must implement.
  */
diff --git a/include/scmi_agent.h b/include/scmi_agent.h
index 577892029ff..755986d6c42 100644
--- a/include/scmi_agent.h
+++ b/include/scmi_agent.h
@@ -10,6 +10,7 @@
 #ifndef SCMI_AGENT_H
 #define SCMI_AGENT_H
 
+#include <scmi_protocols.h>
 #include <asm/types.h>
 
 struct udevice;
@@ -74,6 +75,19 @@ int devm_scmi_of_get_channel(struct udevice *dev);
  */
 int devm_scmi_process_msg(struct udevice *dev, struct scmi_msg *msg);
 
+/**
+ * scmi_get_protocol() - get protocol instance
+ *
+ * @dev:	SCMI agent device
+ * @id:		SCMI protocol ID
+ *
+ * Obtain the device instance for given protocol ID, @id.
+ *
+ * Return:	Pointer to the device if found, null otherwise
+ */
+struct udevice *scmi_get_protocol(struct udevice *dev,
+				  enum scmi_std_protocol id);
+
 /**
  * scmi_to_linux_errno() - Convert an SCMI error code into a Linux errno code
  *
-- 
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