sysfs and debugfs nodes.
Mount debugfs to ensure that the debugfs file system is accessible for the debug nodes.
mount -t debugfs none /sys/kernel/debug
UFS device state commands
| Required UFS device state information | Command |
|---|---|
| Check PA/DL error count | cat /sys/kernel/debug/ufshcd/1d84000.ufshc/stats |
| Read UFS device gating delay, in ms | cat /sys/devices/platform/soc@0/1d84000.ufshc/clkgate_delay_ms |
| Read UFS device clocks current frequency at given point | cat /sys/devices/platform/soc@0/1d84000.ufshc/devfreq/1d84000.ufshc/cur_freq |
| Read UFS device I/O scheduler details | cat /sys/devices/platform/soc@0/1d84000.ufshc/devfreq/1d84000.ufshc/governor |
| Read UFS device min frequency during clock scale down | cat /sys/devices/platform/soc@0/1d84000.ufshc/devfreq/1d84000.ufshc/min_freq |
| Read UFS device max frequency during clock scale up | cat /sys/devices/platform/soc@0/1d84000.ufshc/devfreq/1d84000.ufshc/max_freq |
| Read UFS device state active or sleep | cat /sys/devices/platform/soc@0/1d84000.ufshc/power_info/dev_pm |
| Read UFS device gear information such as HS_GEAR3, HS_GEAR4 | cat /sys/devices/platform/soc@0/1d84000.ufshc/power_info/gear |
| Read UFS device number of lanes | cat /sys/devices/platform/soc@0/1d84000.ufshc/power_info/lane |
| Read UFS device link state, ACTIVE or HIBERN8 | cat /sys/devices/platform/soc@0/1d84000.ufshc/power_info/link_state |
| Read UFS device rate information such as Rate A or B | cat /sys/devices/platform/soc@0/1d84000.ufshc/power_info/rate |
| Read UFS device descriptor information | ls /sys/devices/platform/soc@0/1d84000.ufshc/device_descriptor |
| Read UFS device health descriptor information | ls /sys/devices/platform/soc@0/1d84000.ufshc/health_descriptor |
| Read UFS device runtime status information active or suspended | cat /sys/devices/platform/soc@0/1d84000.ufshc/power/runtime_status |
| Find and/or modify the SPM/RPM level | cat /sys/devices/platform/soc@0/1d84000.ufshc/rpm_lvl cat /sys/devices/platform/soc@0/1d84000.ufshc/spm_lvl |
SD card state commands
| Required SD card state information | Command |
|---|---|
| Read SD card error stats information | cat /sys/kernel/debug/mmc1/err_stats |
| Read SD card latest error state details | cat /sys/kernel/debug/mmc1/err_state |
| Check the current running clock details | cat /sys/kernel/debug/mmc1/clock |
| Read the SD card runtime status information (active or suspended) | cat /sys/devices/platform/soc@0/87c4000.sdhci/power/runtime_status |
| Read SD card auto suspend delay time | cat /sys/devices/platform/soc@0/87c4000.sdhci/power/autosuspend_delay_ms |
| Read SD card runtime active time | cat /sys/devices/platform/soc@0/87c4000.sdhci/power/runtime_active_time |
| Read SD card runtime suspend time | cat /sys/devices/platform/soc@0/87c4000.sdhci/power/runtime_suspended_time |
| Read SD card uevent details | cat /sys/devices/platform/soc@0/87c4000.sdhci/uevent |
NVMe state commands
| Required NVMe card state information | Command |
|---|---|
| View device model name | cat /sys/class/nvme/nvme0/model |
| View device serial number | cat /sys/class/nvme/nvme0/serial |
| View current firmware version | cat /sys/class/nvme/nvme0/firmware_rev |
| View namespace identifier | cat /sys/class/nvme/nvme0/nvme0n1/nsid |
| View namespace size | cat /sys/class/nvme/nvme0/nvme0n1/size |
| View the offset in bytes to align the start of the NVMe namespace to the optimal I/O boundary | cat /sys/class/nvme/nvme0/nvme0n1/alignment_offset |
| View queue depth | cat /sys/class/nvme/nvme0/queue_count |
eMMC node commands
| Description | Command |
|---|---|
| eMMC error stats information | cat /sys/kernel/debug/mmc0/err_stats |
| eMMC latest error state details | cat /sys/kernel/debug/mmc0/err_state |
| Current running clock details of an eMMC | cat /sys/kernel/debug/mmc0/clock |
| eMMC runtime status information | cat /sys/devices/platform/soc@0/<sdhci_addr>.mmc/power/runtime_status |
| eMMC auto suspend delay time | cat /sys/devices/platform/soc@0/<sdhci_addr>.mmc/power/autosuspend_delay_ms |
| eMMC runtime active time | cat /sys/devices/platform/soc@0/<sdhci_addr>.mmc/power/runtime_active_time |
| eMMC runtime suspend time | cat /sys/devices/platform/soc@0/<sdhci_addr>.mmc/power/runtime_suspended_time |
| eMMC uevent details | cat /sys/devices/platform/soc@0/<sdhci_addr>.mmc/uevent |
Update the
<sdhc1_address> values based on the SDHCI physical address of the chip products.Example:- Qualcomm Dragonwing™ IQ-615:
7c4000 - Qualcomm Dragonwing™ IQ-8275:
87c4000 - Qualcomm Dragonwing™ IQ-9075:
7c4000