linux-kernel - Re: [PATCH 6/7] firmware: arm_scmi: imx: Support getting board info of MISC protocol

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Message-ID: <aF6gi9ejloRphvgI@pluto>
Date: Fri, 27 Jun 2025 14:45:47 +0100
From: Cristian Marussi <cristian.marussi@....com>
To: Peng Fan <peng.fan@....com>
Cc: Sudeep Holla <sudeep.holla@....com>,
	Cristian Marussi <cristian.marussi@....com>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, arm-scmi@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 6/7] firmware: arm_scmi: imx: Support getting board info
 of MISC protocol

On Fri, Jun 27, 2025 at 02:03:49PM +0800, Peng Fan wrote:
> MISC protocol supports getting board information. Add the API for user
> to retrieve the information from SM
> 
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>  .../firmware/arm_scmi/vendors/imx/imx-sm-misc.c    | 30 ++++++++++++++++++++++
>  include/linux/scmi_imx_protocol.h                  |  5 ++++
>  2 files changed, 35 insertions(+)
> 
> diff --git a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
> index 1a6d75357b76ce6bb7d06461999b368c27f1fa43..35c63e7cb189475807ed1e6723dbcb61ab66800a 100644
> --- a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
> +++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
> @@ -29,6 +29,7 @@ enum scmi_imx_misc_protocol_cmd {
>  	SCMI_IMX_MISC_SI_INFO = 0xB,
>  	SCMI_IMX_MISC_CFG_INFO = 0xC,
>  	SCMI_IMX_MISC_SYSLOG = 0xD,
> +	SCMI_IMX_MISC_BOARD_INFO = 0xE,
>  	SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
>  };
>  
> @@ -76,6 +77,11 @@ struct scmi_imx_misc_buildinfo_out {
>  	u8 buildtime[MISC_MAX_BUILDTIME];
>  };
>  
> +struct scmi_imx_misc_board_info_out {
> +	__le32 attributes;
> +	u8 brdname[MISC_MAX_BRDNAME];
> +};
> +
>  struct scmi_imx_misc_cfg_info_out {
>  	__le32 msel;
>  	u8 cfgname[MISC_MAX_CFGNAME];
> @@ -334,6 +340,29 @@ static int scmi_imx_discover_build_info(const struct scmi_protocol_handle *ph,
>  	return ret;
>  }
>  
> +static int scmi_imx_misc_board_info(const struct scmi_protocol_handle *ph,
> +				    struct scmi_imx_misc_system_info *info)
> +{
> +	struct scmi_imx_misc_board_info_out *out;
> +	struct scmi_xfer *t;
> +	int ret;
> +
> +	ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_BOARD_INFO, 0, sizeof(*out), &t);
> +	if (ret)
> +		return ret;
> +
> +	ret = ph->xops->do_xfer(ph, t);
> +	if (!ret) {
> +		out = t->rx.buf;
> +		info->brd_attributes = le32_to_cpu(out->attributes);
> +		strscpy(info->brdname, out->brdname, MISC_MAX_BRDNAME);
> +	}
> +
> +	ph->xops->xfer_put(ph, t);
> +
> +	return ret;
> +}
> +
>  static int scmi_imx_misc_cfg_info(const struct scmi_protocol_handle *ph,
>  				  struct scmi_imx_misc_system_info *info)
>  {
> @@ -446,6 +475,7 @@ static int scmi_imx_misc_syslog(const struct scmi_protocol_handle *ph, u16 size,
>  }
>  
>  static const struct scmi_imx_misc_proto_ops scmi_imx_misc_proto_ops = {
> +	.misc_board_info = scmi_imx_misc_board_info,
>  	.misc_cfg_info = scmi_imx_misc_cfg_info,
>  	.misc_ctrl_set = scmi_imx_misc_ctrl_set,
>  	.misc_ctrl_get = scmi_imx_misc_ctrl_get,
> diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_protocol.h
> index ff34d974046aa982fa9f5d46fc673412e01a532d..4950cd6f50aa7b3038bd519a7287e805f70e1cf5 100644
> --- a/include/linux/scmi_imx_protocol.h
> +++ b/include/linux/scmi_imx_protocol.h
> @@ -56,6 +56,7 @@ struct scmi_imx_misc_ctrl_notify_report {
>  #define MISC_MAX_BUILDTIME	16
>  #define MISC_MAX_CFGNAME	16
>  #define MISC_MAX_SINAME		16
> +#define MISC_MAX_BRDNAME	16
>  
>  struct scmi_imx_misc_system_info {
>  	u32 buildnum;
> @@ -69,6 +70,8 @@ struct scmi_imx_misc_system_info {
>  	u32 sirev;
>  	u32 partnum;
>  	u8 siname[MISC_MAX_SINAME];
> +	u32 brd_attributes;
> +	u8 brdname[MISC_MAX_BRDNAME];
>  };

Same comment here as before...

>  
>  struct scmi_imx_misc_sys_sleep_rec {
> @@ -89,6 +92,8 @@ struct scmi_imx_misc_syslog {
>  };
>  
>  struct scmi_imx_misc_proto_ops {
> +	int (*misc_board_info)(const struct scmi_protocol_handle *ph,
> +			       struct scmi_imx_misc_system_info *info);
>  	int (*misc_cfg_info)(const struct scmi_protocol_handle *ph,
>  			     struct scmi_imx_misc_system_info *info);
>  	int (*misc_ctrl_set)(const struct scmi_protocol_handle *ph, u32 id,
>

Anyway, LGTM.
Reviewed-by: Cristian Marussi <cristian.marussi@....com>
 
Thanks,
Cristian