[PATCH/RFC 4/6] drivers: firmware: psci: Fix non-PMIC wake-up if SYSTEM_SUSPEND cuts power

Pavel Machek
2017-02-21T11:07:30Z

On Mon 2017-02-20 21:33:27, Geert Uytterhoeven wrote:
> Nothing in the PSCI specification requires the SoC to remain powered and
> to support wake-up sources when suspended using SYSTEM_SUSPEND.
> If the firmware implements the PSCI SYSTEM_SUSPEND operation by cutting
> power to the SoC, the only possibly wake-up sources are thus the ones
> connected to the PMIC.
>
> Document and add support for an "arm,psci-system-suspend-is-power-down"
> DT property, so Linux uses a different suspend method when other wake-up
> sources (e.g. wake on LAN, UART or GPIO) are enabled.

Should we make PSCI return that information? (At least in next
specification version?)

Pavel

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