firmware: arm_scmi: Remove const from transport descriptors

The descriptor structure scmi_desc contains a variety of fields related to
the transport functionalities and it is defined by the transport drivers
themselves; such elements, though, serve varied purposes and have different
lifetime.

In particular, while there are some of those elements that provide a
description of transport features that are supposed to be immutable, on
the other side there are present also some other characteristics that are
instead supposed to be configurable on a per-platform base since they
represent configuration features tied to the specific hardware/firmware
system.

The immutable fields are already qualified as const on the their own; get
rid of the structure-level const qualifier which is not needed, so as to
enable possible runtime customization of the mutable configuration
features.

No functional change.
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Tested-by: Peng Fan <peng.fan@nxp.com>  #i.MX95 19x19 EVK
Message-Id: <20240730144707.1647025-2-cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

drivers/firmware/arm_scmi/common.h

@@ -405,7 +405,7 @@ struct scmi_transport_core_operations {
  */
 struct scmi_transport {
 	struct device *supplier;
-	const struct scmi_desc *desc;
+	struct scmi_desc *desc;
 	struct scmi_transport_core_operations **core_ops;
 };
 

drivers/firmware/arm_scmi/transports/mailbox.c

@@ -355,7 +355,7 @@ static const struct scmi_transport_ops scmi_mailbox_ops = {
 	.poll_done = mailbox_poll_done,
 };
 
-static const struct scmi_desc scmi_mailbox_desc = {
+static struct scmi_desc scmi_mailbox_desc = {
 	.ops = &scmi_mailbox_ops,
 	.max_rx_timeout_ms = 30, /* We may increase this if required */
 	.max_msg = 20, /* Limited by MBOX_TX_QUEUE_LEN */

drivers/firmware/arm_scmi/transports/optee.c

@@ -510,7 +510,7 @@ static int scmi_optee_ctx_match(struct tee_ioctl_version_data *ver, const void *
 	return ver->impl_id == TEE_IMPL_ID_OPTEE;
 }
 
-static const struct scmi_desc scmi_optee_desc = {
+static struct scmi_desc scmi_optee_desc = {
 	.ops = &scmi_optee_ops,
 	.max_rx_timeout_ms = 30,
 	.max_msg = 20,

drivers/firmware/arm_scmi/transports/smc.c

@@ -273,7 +273,7 @@ static const struct scmi_transport_ops scmi_smc_ops = {
 	.fetch_response = smc_fetch_response,
 };
 
-static const struct scmi_desc scmi_smc_desc = {
+static struct scmi_desc scmi_smc_desc = {
 	.ops = &scmi_smc_ops,
 	.max_rx_timeout_ms = 30,
 	.max_msg = 20,

drivers/firmware/arm_scmi/transports/virtio.c

@@ -790,7 +790,7 @@ static const struct scmi_transport_ops scmi_virtio_ops = {
 	.poll_done = virtio_poll_done,
 };
 
-static const struct scmi_desc scmi_virtio_desc = {
+static struct scmi_desc scmi_virtio_desc = {
 	.ops = &scmi_virtio_ops,
 	/* for non-realtime virtio devices */
 	.max_rx_timeout_ms = VIRTIO_MAX_RX_TIMEOUT_MS,