On Fri, Jan 19, 2024 at 8:34 PM Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> wrote: > > On Fri, Jan 19, 2024 at 07:34:26PM +0100, Rafael J. Wysocki wrote: > > On Fri, Jan 19, 2024 at 2:25 PM Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx> wrote: > > > > > > Store the state change reason to some black box for later investigation. > > > > Seriously? > > > > What black box, where, how this is useful and who is going to use it, > > pretty please. > > The 'black box' refers to a non-volatile memory (NVMEM) cell used by the > Power State Change Reasons (PSCR) framework. This cell stores reasons > for sudden power state changes, like voltage drops or over-temperature > events. This data is invaluable for post-mortem analysis to understand > system failures or abrupt shutdowns. It's particularly useful for > systems where PMICs or watchdogs cannot record such events. The data can > inform recovery routines in the bootloader or early kernel stages during > subsequent boots, enhancing system reliability and aiding in debugging > and diagnostics. OK, so please add all of the above to the patch changelog.
