diff options
| -rw-r--r-- | drivers/firmware/scmi/scmi_agent-uclass.c | 19 | ||||
| -rw-r--r-- | include/scmi_agent-uclass.h | 9 | ||||
| -rw-r--r-- | include/scmi_agent.h | 9 |
3 files changed, 36 insertions, 1 deletions
diff --git a/drivers/firmware/scmi/scmi_agent-uclass.c b/drivers/firmware/scmi/scmi_agent-uclass.c index f7fa5df214c..2b6211c4e6a 100644 --- a/drivers/firmware/scmi/scmi_agent-uclass.c +++ b/drivers/firmware/scmi/scmi_agent-uclass.c @@ -128,6 +128,23 @@ static const struct scmi_agent_ops *transport_dev_ops(struct udevice *dev) return (const struct scmi_agent_ops *)dev->driver->ops; } +int devm_scmi_of_get_channel(struct udevice *dev, struct scmi_channel **channel) +{ + struct udevice *parent; + + parent = find_scmi_transport_device(dev); + if (!parent) + return -ENODEV; + + if (transport_dev_ops(parent)->of_get_channel) + return transport_dev_ops(parent)->of_get_channel(dev, channel); + + /* Drivers without a get_channel operator don't need a channel ref */ + *channel = NULL; + + return 0; +} + int devm_scmi_process_msg(struct udevice *dev, struct scmi_channel *channel, struct scmi_msg *msg) { @@ -141,7 +158,7 @@ int devm_scmi_process_msg(struct udevice *dev, struct scmi_channel *channel, ops = transport_dev_ops(parent); if (ops->process_msg) - return ops->process_msg(parent, NULL, msg); + return ops->process_msg(parent, channel, msg); return -EPROTONOSUPPORT; } diff --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h index 562a4cc99af..b1c93532c0e 100644 --- a/include/scmi_agent-uclass.h +++ b/include/scmi_agent-uclass.h @@ -14,6 +14,15 @@ struct scmi_channel; */ struct scmi_agent_ops { /* + * of_get_channel - Get SCMI channel from SCMI agent device tree node + * + * @dev: 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); + + /* * process_msg - Request transport to get the SCMI message processed * * @dev: SCMI protocol device using the transport diff --git a/include/scmi_agent.h b/include/scmi_agent.h index f4d85cae773..ee6286366df 100644 --- a/include/scmi_agent.h +++ b/include/scmi_agent.h @@ -46,6 +46,15 @@ struct scmi_msg { } /** + * devm_scmi_of_get_channel() - Get SCMI channel handle from SCMI agent DT node + * + * @dev: Device requesting a channel + * @channel: Output reference to the SCMI channel upon success + * @return 0 on success and a negative errno on failure + */ +int devm_scmi_of_get_channel(struct udevice *dev, struct scmi_channel **channel); + +/** * devm_scmi_process_msg() - Send and process an SCMI message * * Send a message to an SCMI server through a target SCMI agent device. |