firmware: scmi: add a version check against base protocol
In SCMI base protocol version 2 (0x20000), new interfaces,
BASE_SET_DEVICE_PERMISSIONS/BASE_SET_PROTOCOL_PERMISSIONS/
BASE_RESET_AGENT_CONFIGURATION, were added. Moreover, the api of
BASE_DISCOVER_AGENT was changed to support self-agent discovery.
So the driver expects SCMI firmware support version 2 of base protocol.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
diff --git a/drivers/firmware/scmi/base.c b/drivers/firmware/scmi/base.c
index ee84e26..1d41a8a 100644
--- a/drivers/firmware/scmi/base.c
+++ b/drivers/firmware/scmi/base.c
@@ -481,6 +481,7 @@
*/
static int scmi_base_probe(struct udevice *dev)
{
+ u32 version;
int ret;
ret = devm_scmi_of_get_channel(dev);
@@ -488,6 +489,13 @@
dev_err(dev, "get_channel failed\n");
return ret;
}
+ ret = scmi_base_protocol_version_int(dev, &version);
+ if (ret) {
+ dev_err(dev, "getting protocol version failed\n");
+ return ret;
+ }
+ if (version < SCMI_BASE_PROTOCOL_VERSION)
+ return -EINVAL;
return ret;
}