firmware: arm_scmi: Cleanup legacy protocol init code

Now that all protocols and drivers have been ported to the new interface
based on protocol handles and get/put operations, remove all the legacy
transient initialization code.

Link: https://lore.kernel.org/r/20210316124903.35011-33-cristian.marussi@arm.comTested-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

drivers/firmware/arm_scmi/bus.c

@@ -66,27 +66,11 @@ const struct scmi_protocol *scmi_protocol_get(int protocol_id)
 	return proto;
 }
 
-static int scmi_protocol_init(int protocol_id, struct scmi_handle *handle)
-{
-	const struct scmi_protocol *proto;
-
-	proto = scmi_protocol_get(protocol_id);
-	if (!proto)
-		return -EINVAL;
-	return proto->init(handle);
-}
-
-static int scmi_protocol_dummy_init(struct scmi_handle *handle)
-{
-	return 0;
-}
-
 static int scmi_dev_probe(struct device *dev)
 {
 	struct scmi_driver *scmi_drv = to_scmi_driver(dev->driver);
 	struct scmi_device *scmi_dev = to_scmi_dev(dev);
 	const struct scmi_device_id *id;
-	int ret;
 
 	id = scmi_dev_match_id(scmi_dev, scmi_drv);
 	if (!id)
@@ -95,14 +79,6 @@ static int scmi_dev_probe(struct device *dev)
 	if (!scmi_dev->handle)
 		return -EPROBE_DEFER;
 
-	ret = scmi_protocol_init(scmi_dev->protocol_id, scmi_dev->handle);
-	if (ret)
-		return ret;
-
-	/* Skip protocol initialisation for additional devices */
-	idr_replace(&scmi_protocols, &scmi_protocol_dummy_init,
-		    scmi_dev->protocol_id);
-
 	return scmi_drv->probe(scmi_dev);
 }
 
@@ -219,7 +195,7 @@ int scmi_protocol_register(const struct scmi_protocol *proto)
 		return -EINVAL;
 	}
 
-	if (!proto->init && !proto->instance_init) {
+	if (!proto->instance_init) {
 		pr_err("missing init for protocol 0x%x\n", proto->id);
 		return -EINVAL;
 	}

drivers/firmware/arm_scmi/common.h

@@ -224,14 +224,12 @@ int scmi_version_get(const struct scmi_handle *h, u8 protocol, u32 *version);
 void scmi_setup_protocol_implemented(const struct scmi_protocol_handle *ph,
 				     u8 *prot_imp);
 
-typedef int (*scmi_prot_init_fn_t)(struct scmi_handle *);
 typedef int (*scmi_prot_init_ph_fn_t)(const struct scmi_protocol_handle *);
 
 /**
  * struct scmi_protocol  - Protocol descriptor
  * @id: Protocol ID.
- * @init: Mandatory protocol initialization function.
- * @instance_init: Optional protocol instance initialization function.
+ * @instance_init: Mandatory protocol initialization function.
  * @instance_deinit: Optional protocol de-initialization function.
  * @ops: Optional reference to the operations provided by the protocol and
  *	 exposed in scmi_protocol.h.
@@ -239,7 +237,6 @@ typedef int (*scmi_prot_init_ph_fn_t)(const struct scmi_protocol_handle *);
  */
 struct scmi_protocol {
 	const u8				id;
-	const scmi_prot_init_fn_t		init;
 	const scmi_prot_init_ph_fn_t		instance_init;
 	const scmi_prot_init_ph_fn_t		instance_deinit;
 	const void				*ops;