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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 v6 15/17] firmware: arm_scmi: Add optional link_supplier() transport op
Date: Mon, 12 Jul 2021 15:18:31 +0100	[thread overview]
Message-ID: <20210712141833.6628-16-cristian.marussi@arm.com> (raw)
In-Reply-To: <20210712141833.6628-1-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 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>
---
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 7a1e84dc191b..e6403ebe59ca 100644
--- a/drivers/firmware/arm_scmi/common.h
+++ b/drivers/firmware/arm_scmi/common.h
@@ -331,6 +331,7 @@ 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
@@ -345,6 +346,7 @@ 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 24039be7599d..1be86ab40be3 100644
--- a/drivers/firmware/arm_scmi/driver.c
+++ b/drivers/firmware/arm_scmi/driver.c
@@ -1810,6 +1810,12 @@ 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


  parent reply	other threads:[~2021-07-12 14:19 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-12 14:18 [PATCH v6 00/17] Introduce SCMI transport based on VirtIO Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 01/17] firmware: arm_scmi: Avoid padding in sensor message structure Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 02/17] firmware: arm_scmi: Fix max pending messages boundary check Cristian Marussi
2021-07-14 16:46   ` Sudeep Holla
2021-07-12 14:18 ` [PATCH v6 03/17] firmware: arm_scmi: Add support for type handling in common functions Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 04/17] firmware: arm_scmi: Remove scmi_dump_header_dbg() helper Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 05/17] firmware: arm_scmi: Add transport optional init/exit support Cristian Marussi
2021-07-28 11:40   ` Sudeep Holla
2021-07-28 12:28     ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 06/17] firmware: arm_scmi: Introduce monotonically increasing tokens Cristian Marussi
2021-07-28 14:17   ` Sudeep Holla
2021-07-28 16:54     ` Cristian Marussi
2021-08-02 10:24       ` Sudeep Holla
2021-08-03 12:52         ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 07/17] firmware: arm_scmi: Handle concurrent and out-of-order messages Cristian Marussi
2021-07-15 16:36   ` Peter Hilber
2021-07-19  9:14     ` Cristian Marussi
2021-07-22  8:32       ` Peter Hilber
2021-07-28  8:31         ` Cristian Marussi
2021-08-02 10:10   ` Sudeep Holla
2021-08-02 10:27     ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 08/17] firmware: arm_scmi: Add priv parameter to scmi_rx_callback Cristian Marussi
2021-07-28 14:26   ` Sudeep Holla
2021-07-28 17:25     ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 09/17] firmware: arm_scmi: Make .clear_channel optional Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 10/17] firmware: arm_scmi: Make polling mode optional Cristian Marussi
2021-07-15 16:36   ` Peter Hilber
2021-07-19  9:15     ` Cristian Marussi
2021-07-28 14:34   ` Sudeep Holla
2021-07-28 17:41     ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 11/17] firmware: arm_scmi: Make SCMI transports configurable Cristian Marussi
2021-07-28 14:50   ` Sudeep Holla
2021-07-29 16:18     ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 12/17] firmware: arm_scmi: Make shmem support optional for transports Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 13/17] firmware: arm_scmi: Add method to override max message number Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 14/17] firmware: arm_scmi: Add message passing abstractions for transports Cristian Marussi
2021-07-15 16:36   ` Peter Hilber
2021-07-19  9:16     ` Cristian Marussi
2021-07-12 14:18 ` Cristian Marussi [this message]
2021-07-28 15:36   ` [PATCH v6 15/17] firmware: arm_scmi: Add optional link_supplier() transport op Sudeep Holla
2021-07-29 16:19     ` Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 16/17] dt-bindings: arm: Add virtio transport for SCMI Cristian Marussi
2021-07-12 14:18 ` [PATCH v6 17/17] firmware: arm_scmi: Add virtio transport Cristian Marussi
2021-07-15 16:35 ` [PATCH v6 00/17] Introduce SCMI transport based on VirtIO Peter Hilber
2021-07-19 11:36   ` Cristian Marussi
2021-07-22  8:30     ` Peter Hilber
2021-08-11  9:31 ` Floris Westermann
2021-08-11 15:26   ` Cristian Marussi

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