• Paul Mundt's avatar
    drivers: sh: Generalize runtime PM platform stub. · 750a7eee
    Paul Mundt authored
    The runtime PM platform support stub in use by ARM-based SH/R-Mobile
    platforms contains nothing that's specifically ARM-related and instead of
    wholly generic to anything using the clock framework.
    
    The recent runtime PM changes interact rather badly with the lazy
    disabling of clocks late in the boot process through the clock framework,
    leading to situations where the runtime suspend/resume paths are entered
    without a clock being actively driven due to having been lazily gated
    off.
    
    In order to correct this we can trivially tie in the aforementioned stub
    as a general fallback for all SH platforms that don't presently have
    their own runtime PM implementations (the corner case being SH-based
    SH-Mobile platforms, which have their own stub through the hwblk API --
    which in turn has bitrotted and will be subsequently adapted to use the
    same stub as everyone else), regardless of whether the platforms choose
    to define power domains of their own or not.
    
    This fixes up regressions for clock framework users who also build in
    runtime PM support without any specific power domains of their own, which
    was previously causing the serial console to be lost when warring with
    lazy clock disabling.
    Signed-off-by: default avatarPaul Mundt <lethal@linux-sh.org>
    750a7eee
pm_runtime.c 1.52 KB