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

Peng Fan
2025-07-04T09:17:20Z

On Wed, Jul 02, 2025 at 04:22:47PM +0100, Sudeep Holla wrote:
>On Fri, Jun 27, 2025 at 02:03:50PM +0800, Peng Fan wrote:
>> 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);
>> +
>
>Why can't this be individual files and values ?

The System manager firmware provides a command "syslog" to dump
all the information, I just follow same.

With individual files, some values may not be consistent, because
system behaviour may change during reading two files.

Regards,
Peng

>
>--
>Regards,
>Sudeep