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From: Cristian Marussi <cristian.marussi@arm.com>
To: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	virtualization@lists.linux-foundation.org,
	virtio-dev@lists.oasis-open.org
Cc: sudeep.holla@arm.com, james.quinlan@broadcom.com,
	Jonathan.Cameron@Huawei.com, f.fainelli@gmail.com,
	etienne.carriere@linaro.org, vincent.guittot@linaro.org,
	souvik.chakravarty@arm.com, cristian.marussi@arm.com,
	igor.skalkin@opensynergy.com, peter.hilber@opensynergy.com,
	alex.bennee@linaro.org, jean-philippe@linaro.org,
	mikhail.golubev@opensynergy.com, anton.yakovlev@opensynergy.com,
	Vasyl.Vavrychuk@opensynergy.com,
	Andriy.Tryshnivskyy@opensynergy.com
Subject: [PATCH v7 12/15] firmware: arm_scmi: Add optional link_supplier() transport op
Date: Tue,  3 Aug 2021 14:10:21 +0100	[thread overview]
Message-ID: <20210803131024.40280-13-cristian.marussi@arm.com> (raw)
In-Reply-To: <20210803131024.40280-1-cristian.marussi@arm.com>

From: Peter Hilber <peter.hilber@opensynergy.com>

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.

Signed-off-by: Peter Hilber <peter.hilber@opensynergy.com>
[ Cristian: reworded commit message ]
Signed-off-by: Cristian Marussi <cristian.marussi@arm.com>
---
v6 --> v7
- fixed commit message
v5 --> v6
- reworded commit message
---
 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 4da6cecc0a1c..024d97fbf97b 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 a907f3fe4c08..7ae4ec8f8d1f 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;
-- 
2.17.1


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  parent reply	other threads:[~2021-08-03 13:29 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03 13:10 [PATCH v7 00/15] Introduce SCMI transport based on VirtIO Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 01/15] firmware: arm_scmi: Add support for type handling in common functions Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 02/15] firmware: arm_scmi: Remove scmi_dump_header_dbg() helper Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 03/15] firmware: arm_scmi: Add optional transport_init/exit support Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 04/15] firmware: arm_scmi: Introduce monotonically increasing tokens Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 05/15] firmware: arm_scmi: Handle concurrent and out-of-order messages Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 06/15] firmware: arm_scmi: Make .clear_channel optional Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 07/15] firmware: arm_scmi: Make polling mode optional Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 08/15] firmware: arm_scmi: Make SCMI transports configurable Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 09/15] firmware: arm_scmi: Make shmem support optional for transports Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 10/15] firmware: arm_scmi: Add method to override max message number Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 11/15] firmware: arm_scmi: Add message passing abstractions for transports Cristian Marussi
2021-08-03 13:10 ` Cristian Marussi [this message]
2021-08-03 13:10 ` [PATCH v7 13/15] dt-bindings: arm: Add virtio transport for SCMI Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 14/15] firmware: arm_scmi: Add priv parameter to scmi_rx_callback Cristian Marussi
2021-08-03 13:10 ` [PATCH v7 15/15] firmware: arm_scmi: Add virtio transport Cristian Marussi
2021-09-04 13:03   ` [virtio-dev] " Michael S. Tsirkin
2021-09-05  7:14     ` Cristian Marussi
2021-08-09  4:57 ` [PATCH v7 00/15] Introduce SCMI transport based on VirtIO Sudeep Holla

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