In the next patch, SCMI_PROTOCOL_VERSION support is added on the existing
SCMI protocols and the version check will be introduced.
To finish "ut dm scmi_[clocks|resets|voltage_domains]" tests, sandbox SCMI
agent should also implement/mimic this command.

Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
---
 drivers/firmware/scmi/sandbox-scmi_agent.c | 80 ++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/drivers/firmware/scmi/sandbox-scmi_agent.c 
b/drivers/firmware/scmi/sandbox-scmi_agent.c
index ab8afb01de40..a99fcb0ad4a9 100644
--- a/drivers/firmware/scmi/sandbox-scmi_agent.c
+++ b/drivers/firmware/scmi/sandbox-scmi_agent.c
@@ -43,6 +43,10 @@
 #define SANDBOX_SCMI_AGENT_NAME "OSPM"
 #define SANDBOX_SCMI_PLATFORM_NAME "platform"
 
+#define SANDBOX_SCMI_CLOCK_PROTOCOL_VERSION SCMI_CLOCK_PROTOCOL_VERSION
+#define SANDBOX_SCMI_RD_PROTOCOL_VERSION SCMI_RESETDOM_PROTOCOL_VERSION
+#define SANDBOX_SCMI_VOLTD_PROTOCOL_VERSION SCMI_VOLTDOM_PROTOCOL_VERSION
+
 static u8 protocols[] = {
        SCMI_PROTOCOL_ID_CLOCK,
        SCMI_PROTOCOL_ID_RESET_DOMAIN,
@@ -440,6 +444,28 @@ static int 
sandbox_scmi_base_reset_agent_configuration(struct udevice *dev,
 
 /* Clock Protocol */
 
+/**
+ * sandbox_scmi_clock_protocol_version - implement SCMI_PROTOCOL_VERSION
+ * @udevice:   SCMI device
+ * @msg:       SCMI message
+ *
+ * Implement SCMI_PROTOCOL_VERSION command.
+ */
+static int sandbox_scmi_clock_protocol_version(struct udevice *dev,
+                                              struct scmi_msg *msg)
+{
+       struct scmi_protocol_version_out *out = NULL;
+
+       if (!msg->out_msg || msg->out_msg_sz < sizeof(*out))
+               return -EINVAL;
+
+       out = (struct scmi_protocol_version_out *)msg->out_msg;
+       out->version = SANDBOX_SCMI_CLOCK_PROTOCOL_VERSION;
+       out->status = SCMI_SUCCESS;
+
+       return 0;
+}
+
 static int sandbox_scmi_clock_protocol_attribs(struct udevice *dev,
                                               struct scmi_msg *msg)
 {
@@ -577,6 +603,30 @@ static int sandbox_scmi_clock_gate(struct udevice *dev, 
struct scmi_msg *msg)
        return 0;
 }
 
+/* Reset Domain Protocol */
+
+/**
+ * sandbox_scmi_rd_protocol_version - implement SCMI_PROTOCOL_VERSION
+ * @udevice:   SCMI device
+ * @msg:       SCMI message
+ *
+ * Implement SCMI_PROTOCOL_VERSION command.
+ */
+static int sandbox_scmi_rd_protocol_version(struct udevice *dev,
+                                           struct scmi_msg *msg)
+{
+       struct scmi_protocol_version_out *out = NULL;
+
+       if (!msg->out_msg || msg->out_msg_sz < sizeof(*out))
+               return -EINVAL;
+
+       out = (struct scmi_protocol_version_out *)msg->out_msg;
+       out->version = SANDBOX_SCMI_RD_PROTOCOL_VERSION;
+       out->status = SCMI_SUCCESS;
+
+       return 0;
+}
+
 static int sandbox_scmi_rd_attribs(struct udevice *dev, struct scmi_msg *msg)
 {
        struct scmi_rd_attr_in *in = NULL;
@@ -647,6 +697,30 @@ static int sandbox_scmi_rd_reset(struct udevice *dev, 
struct scmi_msg *msg)
        return 0;
 }
 
+/* Voltage Domain Protocol */
+
+/**
+ * sandbox_scmi_voltd_protocol_version - implement SCMI_PROTOCOL_VERSION
+ * @udevice:   SCMI device
+ * @msg:       SCMI message
+ *
+ * Implement SCMI_PROTOCOL_VERSION command.
+ */
+static int sandbox_scmi_voltd_protocol_version(struct udevice *dev,
+                                              struct scmi_msg *msg)
+{
+       struct scmi_protocol_version_out *out = NULL;
+
+       if (!msg->out_msg || msg->out_msg_sz < sizeof(*out))
+               return -EINVAL;
+
+       out = (struct scmi_protocol_version_out *)msg->out_msg;
+       out->version = SANDBOX_SCMI_VOLTD_PROTOCOL_VERSION;
+       out->status = SCMI_SUCCESS;
+
+       return 0;
+}
+
 static int sandbox_scmi_voltd_attribs(struct udevice *dev, struct scmi_msg 
*msg)
 {
        struct scmi_voltd_attr_in *in = NULL;
@@ -833,6 +907,8 @@ static int sandbox_scmi_test_process_msg(struct udevice 
*dev,
                break;
        case SCMI_PROTOCOL_ID_CLOCK:
                switch (msg->message_id) {
+               case SCMI_PROTOCOL_VERSION:
+                       return sandbox_scmi_clock_protocol_version(dev, msg);
                case SCMI_PROTOCOL_ATTRIBUTES:
                        return sandbox_scmi_clock_protocol_attribs(dev, msg);
                case SCMI_CLOCK_ATTRIBUTES:
@@ -849,6 +925,8 @@ static int sandbox_scmi_test_process_msg(struct udevice 
*dev,
                break;
        case SCMI_PROTOCOL_ID_RESET_DOMAIN:
                switch (msg->message_id) {
+               case SCMI_PROTOCOL_VERSION:
+                       return sandbox_scmi_rd_protocol_version(dev, msg);
                case SCMI_RESET_DOMAIN_ATTRIBUTES:
                        return sandbox_scmi_rd_attribs(dev, msg);
                case SCMI_RESET_DOMAIN_RESET:
@@ -859,6 +937,8 @@ static int sandbox_scmi_test_process_msg(struct udevice 
*dev,
                break;
        case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN:
                switch (msg->message_id) {
+               case SCMI_PROTOCOL_VERSION:
+                       return sandbox_scmi_voltd_protocol_version(dev, msg);
                case SCMI_VOLTAGE_DOMAIN_ATTRIBUTES:
                        return sandbox_scmi_voltd_attribs(dev, msg);
                case SCMI_VOLTAGE_DOMAIN_CONFIG_SET:
-- 
2.41.0

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