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Message-Id: <20250827-sm-misc-api-v1-v3-6-82c982c1815a@nxp.com>
Date: Wed, 27 Aug 2025 12:59:18 +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 v3 6/6] firmware: imx: sm-misc: Dump syslog info
Add sysfs interface to read System Manager syslog info
Reviewed-by: Cristian Marussi <cristian.marussi@....com>
Signed-off-by: Peng Fan <peng.fan@....com>
---
drivers/firmware/imx/sm-misc.c | 232 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 232 insertions(+)
diff --git a/drivers/firmware/imx/sm-misc.c b/drivers/firmware/imx/sm-misc.c
index fc3ee12c2be878e0285183e3381c9514a63d5142..e742a2fff06b44ab7f07e9f97f723ef7ca1ff259 100644
--- a/drivers/firmware/imx/sm-misc.c
+++ b/drivers/firmware/imx/sm-misc.c
@@ -3,6 +3,7 @@
* Copyright 2024 NXP
*/
+#include <linux/device/devres.h>
#include <linux/firmware/imx/sm.h>
#include <linux/module.h>
#include <linux/of.h>
@@ -44,10 +45,232 @@ static int scmi_imx_misc_ctrl_notifier(struct notifier_block *nb,
return 0;
}
+static ssize_t
+wakevector_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, wakesource)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", syslog->syssleeprecord.wakesource);
+}
+static DEVICE_ATTR_RO(wakevector);
+
+static ssize_t
+syssleepmode_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, syssleepmode)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", syslog->syssleeprecord.syssleepmode);
+}
+static DEVICE_ATTR_RO(syssleepmode);
+
+static ssize_t
+syssleepflags_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, syssleepflags)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "0x%08x\n", syslog->syssleeprecord.syssleepflags);
+}
+static DEVICE_ATTR_RO(syssleepflags);
+
+static ssize_t
+mixpwrstat_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, mixpwrstat)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "0x%08x\n", syslog->syssleeprecord.mixpwrstat);
+}
+static DEVICE_ATTR_RO(mixpwrstat);
+
+static ssize_t
+mempwrstat_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, mempwrstat)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "0x%08x\n", syslog->syssleeprecord.mempwrstat);
+}
+static DEVICE_ATTR_RO(mempwrstat);
+
+static ssize_t
+pllpwrstat_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, pllpwrstat)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "0x%08x\n", syslog->syssleeprecord.pllpwrstat);
+}
+static DEVICE_ATTR_RO(pllpwrstat);
+
+static ssize_t
+sleepentryusec_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, sleepentryusec)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", syslog->syssleeprecord.sleepentryusec);
+}
+static DEVICE_ATTR_RO(sleepentryusec);
+
+static ssize_t
+sleepexitusec_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, sleepexitusec)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", syslog->syssleeprecord.sleepexitusec);
+}
+static DEVICE_ATTR_RO(sleepexitusec);
+
+static ssize_t
+sleepcnt_show(struct device *device, struct device_attribute *attr, char *buf)
+{
+ struct scmi_imx_misc_syslog *syslog = dev_get_drvdata(device);
+ u16 size = sizeof(*syslog) / 4;
+ int ret;
+
+ if (!ph)
+ return 0;
+
+ ret = imx_misc_ctrl_ops->misc_syslog(ph, &size, syslog);
+ if (ret)
+ return ret;
+
+ if (size * 4 < offsetofend(struct scmi_imx_misc_sys_sleep_rec, sleepcnt)) {
+ dev_err(device, "%s: returned truncated data\n", __func__);
+ return -EINVAL;
+ }
+
+ return sysfs_emit(buf, "%u\n", syslog->syssleeprecord.sleepcnt);
+}
+static DEVICE_ATTR_RO(sleepcnt);
+
+static struct attribute *sm_misc_attrs[] = {
+ &dev_attr_wakevector.attr,
+ &dev_attr_syssleepmode.attr,
+ &dev_attr_syssleepflags.attr,
+ &dev_attr_mixpwrstat.attr,
+ &dev_attr_mempwrstat.attr,
+ &dev_attr_pllpwrstat.attr,
+ &dev_attr_sleepentryusec.attr,
+ &dev_attr_sleepexitusec.attr,
+ &dev_attr_sleepcnt.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(sm_misc);
+
static int scmi_imx_misc_ctrl_probe(struct scmi_device *sdev)
{
const struct scmi_handle *handle = sdev->handle;
struct device_node *np = sdev->dev.of_node;
+ struct scmi_imx_misc_syslog *syslog;
u32 src_id, flags;
int ret, i, num;
@@ -63,6 +286,12 @@ static int scmi_imx_misc_ctrl_probe(struct scmi_device *sdev)
if (IS_ERR(imx_misc_ctrl_ops))
return PTR_ERR(imx_misc_ctrl_ops);
+ syslog = devm_kzalloc(&sdev->dev, sizeof(*syslog), GFP_KERNEL);
+ if (!syslog)
+ return -ENOMEM;
+
+ dev_set_drvdata(&sdev->dev, syslog);
+
num = of_property_count_u32_elems(np, "nxp,ctrl-ids");
if (num % 2) {
dev_err(&sdev->dev, "Invalid wakeup-sources\n");
@@ -108,6 +337,9 @@ 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
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