[PATCH 4/7] firmware: arm_scmi: imx: Support getting silicon info of MISC protocol

Peng Fan
2025-06-27T06:05:57Z

MISC protocol supports getting the silicon information including revision
number, part number and etc. 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 | 34 ++++++++++++++++++++++
include/linux/scmi_imx_protocol.h | 8 +++++
2 files changed, 42 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 8ce4bf92e6535af2f30d72a34717678613b35049..d5b24bc4d4ca6c19f4cddfaea6e9d9b32a4c92f7 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_SI_INFO = 0xB,
SCMI_IMX_MISC_CFG_INFO = 0xC,
SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
};
@@ -79,6 +80,13 @@ struct scmi_imx_misc_cfg_info_out {
u8 cfgname[MISC_MAX_CFGNAME];
};

+struct scmi_imx_misc_si_info_out {
+ __le32 deviceid;
+ __le32 sirev;
+ __le32 partnum;
+ u8 siname[MISC_MAX_SINAME];
+};
+
static int scmi_imx_misc_attributes_get(const struct scmi_protocol_handle *ph,
struct scmi_imx_misc_info *mi)
{
@@ -335,12 +343,38 @@ static int scmi_imx_misc_cfg_info(const struct scmi_protocol_handle *ph,
return ret;
}

+static int scmi_imx_misc_silicon_info(const struct scmi_protocol_handle *ph,
+ struct scmi_imx_misc_system_info *info)
+{
+ struct scmi_imx_misc_si_info_out *out;
+ struct scmi_xfer *t;
+ int ret;
+
+ ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_SI_INFO, 0, sizeof(*out), &t);
+ if (ret)
+ return ret;
+
+ ret = ph->xops->do_xfer(ph, t);
+ if (!ret) {
+ out = t->rx.buf;
+ info->deviceid = le32_to_cpu(out->deviceid);
+ info->sirev = le32_to_cpu(out->sirev);
+ info->partnum = le32_to_cpu(out->partnum);
+ strscpy(info->siname, out->siname, MISC_MAX_SINAME);
+ }
+
+ 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,
.misc_discover_build_info = scmi_imx_discover_build_info,
+ .misc_silicon_info = scmi_imx_misc_silicon_info,
};

static int scmi_imx_misc_protocol_init(const struct scmi_protocol_handle *ph)
diff --git a/include/linux/scmi_imx_protocol.h b/include/linux/scmi_imx_protocol.h
index bb0c35b5d6705acddd6c83c31474482a2667b418..0e639dfb5d16e281e2ccf006a63694b316c431f4 100644
--- a/include/linux/scmi_imx_protocol.h
+++ b/include/linux/scmi_imx_protocol.h
@@ -55,6 +55,7 @@ struct scmi_imx_misc_ctrl_notify_report {
#define MISC_MAX_BUILDDATE 16
#define MISC_MAX_BUILDTIME 16
#define MISC_MAX_CFGNAME 16
+#define MISC_MAX_SINAME 16

struct scmi_imx_misc_system_info {
u32 buildnum;
@@ -63,6 +64,11 @@ struct scmi_imx_misc_system_info {
u8 time[MISC_MAX_BUILDTIME];
u32 msel;
u8 cfgname[MISC_MAX_CFGNAME];
+ /* silicon */
+ u32 deviceid;
+ u32 sirev;
+ u32 partnum;
+ u8 siname[MISC_MAX_SINAME];
};

struct scmi_imx_misc_proto_ops {
@@ -76,6 +82,8 @@ struct scmi_imx_misc_proto_ops {
u32 ctrl_id, u32 evt_id, u32 flags);
int (*misc_discover_build_info)(const struct scmi_protocol_handle *ph,
struct scmi_imx_misc_system_info *info);
+ int (*misc_silicon_info)(const struct scmi_protocol_handle *ph,
+ struct scmi_imx_misc_system_info *info);
};

/* See LMM_ATTRIBUTES in imx95.rst */

--
2.37.1