Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Tue, 21 Feb 2017 17:36:38 +0100 | Subject | Re: [PATCH/RFC 4/6] drivers: firmware: psci: Fix non-PMIC wake-up if SYSTEM_SUSPEND cuts power |
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Hi Pavel,
On Tue, Feb 21, 2017 at 12:07 PM, Pavel Machek <pavel@ucw.cz> wrote: > 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?)
That's a possible solution.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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