From 7885281260f9b952dc66b67182a2218b01e7859f Mon Sep 17 00:00:00 2001 From: Peter Hilber Date: Tue, 3 Aug 2021 14:10:21 +0100 Subject: [PATCH] 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: Peter Hilber [ Cristian: reworded commit message ] Signed-off-by: Cristian Marussi Signed-off-by: Sudeep Holla --- drivers/firmware/arm_scmi/common.h | 2 ++ drivers/firmware/arm_scmi/driver.c | 6 ++++++ 2 files changed, 8 insertions(+) diff --git a/drivers/firmware/arm_scmi/common.h b/drivers/firmware/arm_scmi/common.h index 4da6cec..024d97f 100644 --- a/drivers/firmware/arm_scmi/common.h +++ b/drivers/firmware/arm_scmi/common.h @@ -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); diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index a907f3f..7ae4ec8 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -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; -- 2.7.4