clk: scmi: add compatibility with clock protocol 2.0

Since clock protocol 2.0, SCMI specification add an option field
"clock_enable_delay" to CLOCK_ATTRIBUTES command.

scmi_read_resp_from_smt() will return an error ("Buffer too small") as
the message length coming from the SCMI server is not the same as expected.

So implement a condition to SCMI clock protocol version to change the
length of the expected message.

Signed-off-by: Valentin Caron <[email protected]>
Signed-off-by: Patrice Chotard <[email protected]>
Cc: Lukasz Majewski <[email protected]>
Cc: Sean Anderson <[email protected]>
Reviewed-by: Patrick Delaunay <[email protected]>
Reviewed-by: Patrice Chotard <[email protected]>

1 files changed, 15 insertions, 0 deletions

diff --git a/include/scmi_protocols.h b/include/scmi_protocols.h
index 9046de7e3e7..762a1032c37 100644
--- a/include/scmi_protocols.h
+++ b/include/scmi_protocols.h
@@ -783,6 +783,21 @@ struct scmi_clk_attribute_out {
 };
 
 /**
+ * struct scmi_clk_get_nb_out_v2 - Response payload for SCMI_CLOCK_ATTRIBUTES command
+ * Clock management Protocol 2.0
+ * @status:	SCMI command status
+ * @attributes:	clock attributes
+ * @clock_name:	name of the clock
+ * @clock_enable_delay: delay incurred by the platform to enable the clock
+ */
+struct scmi_clk_attribute_out_v2 {
+	s32 status;
+	u32 attributes;
+	char clock_name[SCMI_CLOCK_NAME_LENGTH_MAX];
+	u32 clock_enable_delay;
+};
+
+/**
  * struct scmi_clk_state_in - Message payload for CLOCK_CONFIG_SET command
  * @clock_id:	SCMI clock ID
  * @attributes:	Attributes of the targets clock state