Commit 3d5d6e84 authored by Cristian Marussi's avatar Cristian Marussi Committed by Sudeep Holla
Browse files

firmware: arm_scmi: Add helper to access protocol revision/version 

Add an helper to access from a protocol handle, the SCMI version data
which is exposed on sysfs. Such helper will be needed by SCMI base
protocol initialization once it will be moved to new protocol handles
scheme.

Link: https://lore.kernel.org/r/20210316124903.35011-10-cristian.marussi@arm.com


Tested-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarCristian Marussi <cristian.marussi@arm.com>
Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent a4a20b09

drivers/firmware/arm_scmi/common.h

+2 −0
Original line number Diff line number Diff line
@@ -215,6 +215,8 @@ struct scmi_xfer_ops { 
			 struct scmi_xfer *xfer);

};



struct scmi_revision_info *

scmi_revision_area_get(const struct scmi_protocol_handle *ph);

int scmi_handle_put(const struct scmi_handle *handle);

struct scmi_handle *scmi_handle_get(struct device *dev);

void scmi_set_handle(struct scmi_device *scmi_dev);

drivers/firmware/arm_scmi/driver.c

+19 −0
Original line number Diff line number Diff line
@@ -698,6 +698,25 @@ static const struct scmi_xfer_ops xfer_ops = { 
	.xfer_put = xfer_put,

};



/**

 * scmi_revision_area_get  - Retrieve version memory area.

 *

 * @ph: A reference to the protocol handle.

 *

 * A helper to grab the version memory area reference during SCMI Base protocol

 * initialization.

 *

 * Return: A reference to the version memory area associated to the SCMI

 *	   instance underlying this protocol handle.

 */

struct scmi_revision_info *

scmi_revision_area_get(const struct scmi_protocol_handle *ph)

{

	const struct scmi_protocol_instance *pi = ph_to_pi(ph);



	return pi->handle->version;

}



/**

 * scmi_alloc_init_protocol_instance  - Allocate and initialize a protocol

 * instance descriptor.