Commit 78852812 authored by Peter Hilber's avatar Peter Hilber Committed by Sudeep Holla
Browse files

firmware: arm_scmi: Add optional link_supplier() transport op 

Some transports are also effectively registered with other kernel subsystem
in order to be properly probed and initialized; as a consequence such kind
of transports, and their related devices, might still not have been probed
and initialized at the time the main SCMI core driver is probed.

Add an optional .link_supplier() transport operation which can be used by
the core SCMI stack to dynamically check if the transport is ready and
dynamically link its device to the SCMI platform instance device.

Link: https://lore.kernel.org/r/20210803131024.40280-13-cristian.marussi@arm.com


Signed-off-by: default avatarPeter Hilber <peter.hilber@opensynergy.com>
[ Cristian: reworded commit message ]
Signed-off-by: default avatarCristian Marussi <cristian.marussi@arm.com>
Signed-off-by: default avatarSudeep Holla <sudeep.holla@arm.com>
parent f301bba0

drivers/firmware/arm_scmi/common.h

+2 −0
Original line number Diff line number Diff line
@@ -348,6 +348,7 @@ struct scmi_chan_info { 
/**

 * struct scmi_transport_ops - Structure representing a SCMI transport ops

 *

 * @link_supplier: Optional callback to add link to a supplier device

 * @chan_available: Callback to check if channel is available or not

 * @chan_setup: Callback to allocate and setup a channel

 * @chan_free: Callback to free a channel
@@ -362,6 +363,7 @@ struct scmi_chan_info { 
 * @poll_done: Callback to poll transfer status

 */

struct scmi_transport_ops {

	int (*link_supplier)(struct device *dev);

	bool (*chan_available)(struct device *dev, int idx);

	int (*chan_setup)(struct scmi_chan_info *cinfo, struct device *dev,

			  bool tx);

drivers/firmware/arm_scmi/driver.c

+6 −0
Original line number Diff line number Diff line
@@ -1814,6 +1814,12 @@ static int scmi_probe(struct platform_device *pdev) 
	handle->devm_protocol_get = scmi_devm_protocol_get;

	handle->devm_protocol_put = scmi_devm_protocol_put;



	if (desc->ops->link_supplier) {

		ret = desc->ops->link_supplier(dev);

		if (ret)

			return ret;

	}



	ret = scmi_txrx_setup(info, dev, SCMI_PROTOCOL_BASE);

	if (ret)

		return ret;