[PATCH 7/7] firmware: imx: sm-misc: Dump syslog and system info

Peng Fan
2025-06-27T06:06:12Z

Add sysfs interface to read System Manager syslog and system info

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/firmware/imx/sm-misc.c | 97 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 97 insertions(+)

diff --git a/drivers/firmware/imx/sm-misc.c b/drivers/firmware/imx/sm-misc.c
index fc3ee12c2be878e0285183e3381c9514a63d5142..55485a3c4a5c615102a377f41025a6911d746770 100644
--- a/drivers/firmware/imx/sm-misc.c
+++ b/drivers/firmware/imx/sm-misc.c
@@ -44,6 +44,100 @@ static int scmi_imx_misc_ctrl_notifier(struct notifier_block *nb,
return 0;
}

+static ssize_t syslog_show(struct device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct scmi_imx_misc_sys_sleep_rec *rec;
+ struct scmi_imx_misc_syslog *syslog;
+ int ret;
+ size_t len = 0;
+
+ if (!ph)
+ return 0;
+
+ syslog = kmalloc(sizeof(*syslog), GFP_KERNEL);
+ if (!syslog)
+ return -ENOMEM;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, sizeof(*syslog), syslog);
+ if (ret) {
+ kfree(syslog);
+ return ret;
+ }
+
+ rec = &syslog->syssleeprecord;
+
+ len += sysfs_emit_at(buf, len, "Wake Vector = %u\n", rec->wakesource);
+ len += sysfs_emit_at(buf, len, "Sys sleep mode = %u\n", rec->syssleepmode);
+ len += sysfs_emit_at(buf, len, "Sys sleep flags = 0x%08x\n", rec->syssleepflags);
+ len += sysfs_emit_at(buf, len, "MIX power status = 0x%08x\n", rec->mixpwrstat);
+ len += sysfs_emit_at(buf, len, "MEM power status = 0x%08x\n", rec->mempwrstat);
+ len += sysfs_emit_at(buf, len, "PLL power status = 0x%08x\n", rec->pllpwrstat);
+ len += sysfs_emit_at(buf, len, "Sleep latency = %u\n", rec->sleepentryusec);
+ len += sysfs_emit_at(buf, len, "Wake latency = %u\n", rec->sleepexitusec);
+ len += sysfs_emit_at(buf, len, "Sleep count = %u\n", rec->sleepcnt);
+
+ kfree(syslog);
+
+ return len;
+}
+
+static DEVICE_ATTR_RO(syslog);
+
+static ssize_t system_info_show(struct device *device, struct device_attribute *attr,
+ char *buf)
+{
+ struct scmi_imx_misc_system_info *info;
+ int len = 0;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ info = kmalloc(sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ ret = imx_misc_ctrl_ops->misc_discover_build_info(ph, info);
+ if (ret)
+ goto err;
+
+ ret = imx_misc_ctrl_ops->misc_cfg_info(ph, info);
+ if (ret)
+ goto err;
+
+ ret = imx_misc_ctrl_ops->misc_silicon_info(ph, info);
+ if (ret)
+ goto err;
+
+ ret = imx_misc_ctrl_ops->misc_board_info(ph, info);
+ if (ret)
+ goto err;
+
+ len += sysfs_emit_at(buf, len, "SM Version = Build %u, Commit 08%x\n",
+ info->buildnum, info->buildcommit);
+ len += sysfs_emit_at(buf, len, "SM Config = %s, mSel=%u\n",
+ info->cfgname, info->msel);
+ len += sysfs_emit_at(buf, len, "Silicon = %s\n", info->siname);
+ len += sysfs_emit_at(buf, len, "Board = %s, attr=0x%08x\n",
+ info->brdname, info->brd_attributes);
+
+ ret = len;
+err:
+ kfree(info);
+ return ret;
+}
+
+static DEVICE_ATTR_RO(system_info);
+
+static struct attribute *sm_misc_attrs[] = {
+ &dev_attr_syslog.attr,
+ &dev_attr_system_info.attr,
+ NULL,
+};
+
+ATTRIBUTE_GROUPS(sm_misc);
+
static int scmi_imx_misc_ctrl_probe(struct scmi_device *sdev)
{
const struct scmi_handle *handle = sdev->handle;
@@ -108,6 +202,9 @@ static const struct scmi_device_id scmi_id_table[] = {
MODULE_DEVICE_TABLE(scmi, scmi_id_table);

static struct scmi_driver scmi_imx_misc_ctrl_driver = {
+ .driver = {
+ .dev_groups = sm_misc_groups,
+ },
.name = "scmi-imx-misc-ctrl",
.probe = scmi_imx_misc_ctrl_probe,
.id_table = scmi_id_table,

--
2.37.1