On Sun, Apr 14, 2024 at 12:30:23PM -0700, Elliot Berman wrote: > The PSCI SYSTEM_RESET2 call allows vendor firmware to define additional > reset types which could be mapped to the reboot argument. > > Setting up reboot on Qualcomm devices can be inconsistent from chipset > to chipset. That doesn't sound good. Do you mean PSCI SYSTEM_RESET doesn't work as expected ? Does it mean it is not conformant to the specification ? > Generally, there is a PMIC register that gets written to > decide the reboot type. There is also sometimes a cookie that can be > written to indicate that the bootloader should behave differently than a > regular boot. These knobs evolve over product generations and require > more drivers. Qualcomm firmwares are beginning to expose vendor > SYSTEM_RESET2 types to simplify driver requirements from Linux. > Why can't this be fully userspace driven ? What is the need to keep the cookie in the DT ? -- Regards, Sudeep
