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

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Message-Id: <20250627-sm-misc-api-v1-v1-6-2b99481fe825@nxp.com>
Date: Fri, 27 Jun 2025 14:03:49 +0800
From: Peng Fan <peng.fan@....com>
To: 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>
Cc: arm-scmi@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH 6/7] firmware: arm_scmi: imx: Support getting board info of
 MISC protocol

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];
 };
 
 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,

-- 
2.37.1