[PATCH 2/7] firmware: arm_scmi: imx: Support discovering buildinfo of MISC protocol

[Peng Fan <peng.fan@nxp.com>]

MISC protocol supports discovering the System Manager(SM) build
information including build commit, build time 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    | 35 ++++++++++++++++++++++
 include/linux/scmi_imx_protocol.h                  | 12 ++++++++
 2 files changed, 47 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 a8915d3b4df518719d56bfff38922625ad9b70f6..1b24d070c6f4856b92f515fcdba5836fd6498ce6 100644
--- a/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
+++ b/drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c
@@ -25,6 +25,7 @@
 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_CTRL_NOTIFY = 0x8,
 };
 
@@ -65,6 +66,13 @@ struct scmi_imx_misc_ctrl_get_out {
 	__le32 val[];
 };
 
+struct scmi_imx_misc_buildinfo_out {
+	__le32 buildnum;
+	__le32 buildcommit;
+	u8 builddate[MISC_MAX_BUILDDATE];
+	u8 buildtime[MISC_MAX_BUILDTIME];
+};
+
 static int scmi_imx_misc_attributes_get(const struct scmi_protocol_handle *ph,
 					struct scmi_imx_misc_info *mi)
 {
@@ -272,10 +280,37 @@ static int scmi_imx_misc_ctrl_set(const struct scmi_protocol_handle *ph,
 	return ret;
 }
 
+static int scmi_imx_discover_build_info(const struct scmi_protocol_handle *ph,
+					struct scmi_imx_misc_system_info *info)
+{
+	struct scmi_imx_misc_buildinfo_out *out;
+	struct scmi_xfer *t;
+	int ret;
+
+	ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_DISCOVER_BUILDINFO, 0,
+				      sizeof(*out), &t);
+	if (ret)
+		return ret;
+
+	ret = ph->xops->do_xfer(ph, t);
+	if (!ret) {
+		out = t->rx.buf;
+		info->buildnum = le32_to_cpu(out->buildnum);
+		info->buildcommit = le32_to_cpu(out->buildcommit);
+		strscpy(info->date, out->builddate, MISC_MAX_BUILDDATE);
+		strscpy(info->time, out->buildtime, MISC_MAX_BUILDTIME);
+	}
+
+	ph->xops->xfer_put(ph, t);
+
+	return ret;
+}
+
 static const struct scmi_imx_misc_proto_ops scmi_imx_misc_proto_ops = {
 	.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,
 };
 
 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 27bd372cbfb142b6acb0b1cf4b82f061529d0d45..826402dfe6f4d3b9e6d2e93868d6699f989e9bcc 100644
--- a/include/linux/scmi_imx_protocol.h
+++ b/include/linux/scmi_imx_protocol.h
@@ -52,6 +52,16 @@ struct scmi_imx_misc_ctrl_notify_report {
 	unsigned int		flags;
 };
 
+#define MISC_MAX_BUILDDATE	16
+#define MISC_MAX_BUILDTIME	16
+
+struct scmi_imx_misc_system_info {
+	u32 buildnum;
+	u32 buildcommit;
+	u8 date[MISC_MAX_BUILDDATE];
+	u8 time[MISC_MAX_BUILDTIME];
+};
+
 struct scmi_imx_misc_proto_ops {
 	int (*misc_ctrl_set)(const struct scmi_protocol_handle *ph, u32 id,
 			     u32 num, u32 *val);
@@ -59,6 +69,8 @@ struct scmi_imx_misc_proto_ops {
 			     u32 *num, u32 *val);
 	int (*misc_ctrl_req_notify)(const struct scmi_protocol_handle *ph,
 				    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);
 };
 
 /* See LMM_ATTRIBUTES in imx95.rst */

-- 
2.37.1