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firmware: scmi: use a protocol's own channel if assigned

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SCMI specification allows any protocol to have its own channel for
the transport. While the current SCMI driver may assign its channel
from a device tree, the core function, devm_scmi_process_msg(), doesn't
use a protocol's channel, but always use an agent's channel.

With this commit, devm_scmi_process_msg() tries to find and use
a protocol's channel. If it doesn't exist, use an agent's.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
AKASHI Takahiro
2023-10-11 19:06:55 +09:00
committed by Tom Rini
parent c6230cd842
commit 689204be97
5 changed files with 18 additions and 12 deletions
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8
include/scmi_agent-uclass.h
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@@ -16,16 +16,18 @@ struct scmi_agent_ops {
/*
* of_get_channel - Get SCMI channel from SCMI agent device tree node
*
* @dev: SCMI protocol device using the transport
* @dev: SCMI agent device using the transport
* @protocol: SCMI protocol device using the transport
* @channel: Output reference to SCMI channel upon success
* Return 0 upon success and a negative errno on failure
*/
int (*of_get_channel)(struct udevice *dev, struct scmi_channel **channel);
int (*of_get_channel)(struct udevice *dev, struct udevice *protocol,
struct scmi_channel **channel);
/*
* process_msg - Request transport to get the SCMI message processed
*
* @dev: SCMI protocol device using the transport
* @dev: SCMI agent device using the transport
* @msg: SCMI message to be transmitted
*/
int (*process_msg)(struct udevice *dev, struct scmi_channel *channel,