[PATCH 3/7] firmware: arm_scmi: imx: Support getting cfg info of MISC protocol

Peng Fan
2025-06-27T06:05:53Z

MISC protocol supports getting the System Manager(SM) mode selection
and configuration name. Add the API for user to retrieve the information
from SM.

Signed-off-by: Peng Fan <peng.fan@nxp.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 1b24d070c6f4856b92f515fcdba5836fd6498ce6..8ce4bf92e6535af2f30d72a34717678613b35049 100644
--- a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
+++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
@@ -26,6 +26,7 @@ enum scmi_imx_misc_protocol_cmd {
SCMI_IMX_MISC_CTRL_SET = 0x3,
SCMI_IMX_MISC_CTRL_GET = 0x4,
SCMI_IMX_MISC_DISCOVER_BUILDINFO = 0x6,
+ SCMI_IMX_MISC_CFG_INFO = 0xC,
SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
};

@@ -73,6 +74,11 @@ struct scmi_imx_misc_buildinfo_out {
u8 buildtime[MISC_MAX_BUILDTIME];
};

+struct scmi_imx_misc_cfg_info_out {
+ __le32 msel;
+ u8 cfgname[MISC_MAX_CFGNAME];
+};
+
static int scmi_imx_misc_attributes_get(const struct scmi_protocol_handle *ph,
struct scmi_imx_misc_info *mi)
{
@@ -306,7 +312,31 @@ static int scmi_imx_discover_build_info(const struct scmi_protocol_handle *ph,
return ret;
}

+static int scmi_imx_misc_cfg_info(const struct scmi_protocol_handle *ph,
+ struct scmi_imx_misc_system_info *info)
+{
+ struct scmi_imx_misc_cfg_info_out *out;
+ struct scmi_xfer *t;
+ int ret;
+
+ ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_CFG_INFO, 0, sizeof(*out), &t);
+ if (ret)
+ return ret;
+
+ ret = ph->xops->do_xfer(ph, t);
+ if (!ret) {
+ out = t->rx.buf;
+ info->msel = le32_to_cpu(out->msel);
+ strscpy(info->cfgname, out->cfgname, MISC_MAX_CFGNAME);
+ }
+
+ ph->xops->xfer_put(ph, t);
+
+ return ret;
+}
+
static const struct scmi_imx_misc_proto_ops scmi_imx_misc_proto_ops = {
+ .misc_cfg_info = scmi_imx_misc_cfg_info,
.misc_ctrl_set = scmi_imx_misc_ctrl_set,
.misc_ctrl_get = scmi_imx_misc_ctrl_get,
.misc_ctrl_req_notify = scmi_imx_misc_ctrl_notify,
diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_protocol.h
index 826402dfe6f4d3b9e6d2e93868d6699f989e9bcc..bb0c35b5d6705acddd6c83c31474482a2667b418 100644
--- a/include/linux/scmi_imx_protocol.h
+++ b/include/linux/scmi_imx_protocol.h
@@ -54,15 +54,20 @@ struct scmi_imx_misc_ctrl_notify_report {

#define MISC_MAX_BUILDDATE 16
#define MISC_MAX_BUILDTIME 16
+#define MISC_MAX_CFGNAME 16

struct scmi_imx_misc_system_info {
u32 buildnum;
u32 buildcommit;
u8 date[MISC_MAX_BUILDDATE];
u8 time[MISC_MAX_BUILDTIME];
+ u32 msel;
+ u8 cfgname[MISC_MAX_CFGNAME];
};

struct scmi_imx_misc_proto_ops {
+ 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,
u32 num, u32 *val);
int (*misc_ctrl_get)(const struct scmi_protocol_handle *ph, u32 id,

--
2.37.1