Re: [PATCH v11 6/7] power: reset: add PSCR NVMEM Driver for Recording Power State Change Reasons

[Faruque Ansari]

Hi Oleksij,

On 18-Jun-25 5:32 PM, Oleksij Rempel wrote:
> This driver utilizes the Power State Change Reasons Recording (PSCRR)
> framework to store specific power state change information, such as
> shutdown or reboot reasons, into a designated non-volatile memory
> (NVMEM) cell.
>
> Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
> ---
> changes v6:
> - rename pscr_reason to psc_reason
> changes v5:
> - avoid a build against NVMEM=m
> changes v4:
> - remove devicetree dependencies
> ---
>   drivers/power/reset/Kconfig       |  22 +++
>   drivers/power/reset/Makefile      |   1 +
>   drivers/power/reset/pscrr-nvmem.c | 254 ++++++++++++++++++++++++++++++
>   3 files changed, 277 insertions(+)
>   create mode 100644 drivers/power/reset/pscrr-nvmem.c

Tested-by: Faruque Ansari <faruque.ansari@xxxxxxxxxxxxxxxx>

I have tested this on Qualcomm's lemans-evk and monaco-evk platforms.

The testing was performed across the following scenarios:

Userspace sys node to set reboot parameter
- Tested the userspace node interface used to configure the reboot
  parameter confirmed that the parameter is applied correctly and
  visible post reboot by reading back the sysfs node.

Overtemperature shutdown
- Simulated fake over-temperature condition and verified that
  proper reason is being reflected in the sysfs node post reboot.

I did not observe any functional issues during testing on either of 
platforms.

Thanks for this patch - it is helpful for us as well.

Best regards,
Faruque Ansari <faruque.ansari@xxxxxxxxxxxxxxxx>