回复: [PATCH] firmware: scmi: support to manage SCMI protocol drivers with a linker-genetated array

[Alice Guo (OSS)]

+ Marek Vasut

> -----邮件原件-----
> 发件人: Alice Guo (OSS)
> 发送时间: 2025年4月2日 12:36
> 收件人: trini at konsulko.com; festevam at gmail.com
> 抄送: u-boot at lists.denx.de
> 主题: [PATCH] firmware: scmi: support to manage SCMI protocol drivers with a
> linker-genetated array
> 
> From: Alice Guo <alice.guo at nxp.com>
> 
> U_BOOT_SCMI_PROTO_DRIVER macro is used to add a SCMI protocol driver to
> scmi_proto_driver list. scmi_proto_driver_get() function can be used to match a
> SCMI protocol id and its driver.
> 
> Signed-off-by: Alice Guo <alice.guo at nxp.com>
> ---
>  drivers/firmware/scmi/scmi_agent-uclass.c | 16 ++++++++++++++++
>  include/scmi_agent-uclass.h               | 15 +++++++++++++++
>  2 files changed, 31 insertions(+)
> 
> diff --git a/drivers/firmware/scmi/scmi_agent-uclass.c
> b/drivers/firmware/scmi/scmi_agent-uclass.c
> index e6e43ae936a..ea79cfa0cf2 100644
> --- a/drivers/firmware/scmi/scmi_agent-uclass.c
> +++ b/drivers/firmware/scmi/scmi_agent-uclass.c
> @@ -352,6 +352,22 @@ static int scmi_fill_base_info(struct udevice *agent,
> struct udevice *dev)
>  	return 0;
>  }
> 
> +static struct driver *scmi_proto_driver_get(unsigned int proto_id) {
> +	struct scmi_proto_driver *start, *entry;
> +	int n_ents;
> +
> +	start = ll_entry_start(struct scmi_proto_driver, scmi_proto_driver);
> +	n_ents = ll_entry_count(struct scmi_proto_driver, scmi_proto_driver);
> +
> +	for (entry = start; entry != start + n_ents; entry++) {
> +		if (entry->match->proto_id == proto_id)
> +			return entry->driver;
> +	}
> +
> +	return NULL;
> +}
> +
>  /*
>   * SCMI agent devices binds devices of various uclasses depending on
>   * the FDT description. scmi_bind_protocol() is a generic bind sequence diff
> --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h index
> 33e0e18c30d..842c56858af 100644
> --- a/include/scmi_agent-uclass.h
> +++ b/include/scmi_agent-uclass.h
> @@ -115,4 +115,19 @@ struct scmi_agent_ops {
>  			   struct scmi_msg *msg);
>  };
> 
> +struct scmi_proto_match {
> +	unsigned int proto_id;
> +};
> +
> +struct scmi_proto_driver {
> +	struct driver *driver;
> +	const struct scmi_proto_match *match;
> +};
> +
> +#define U_BOOT_SCMI_PROTO_DRIVER(__name, __match) \
> +	ll_entry_declare(struct scmi_proto_driver, __name, scmi_proto_driver) =
> { \
> +		.driver = llsym(struct driver, __name, driver), \
> +		.match = __match, \
> +	}
> +
>  #endif /* _SCMI_TRANSPORT_UCLASS_H */
> --
> 2.43.0