Skip to content

Commit

Permalink
clk: renesas: mstp: Keep wakeup sources active during system suspend
Browse files Browse the repository at this point in the history
If a device is part of the CPG/MSTP Clock Domain and to be used as a
wakeup source, it must be kept active during system suspend.

Currently this is handled in device-specific drivers by explicitly
increasing the use count of the module clock when the device is
configured as a wakeup source.  However, the proper way to prevent the
device from being stopped is to inform this requirement to the genpd
core, by setting the GENPD_FLAG_ACTIVE_WAKEUP flag.

Note that this will only affect devices configured as wakeup sources.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
  • Loading branch information
Geert Uytterhoeven committed Dec 14, 2017
1 parent 6408256 commit 744dddc
Showing 1 changed file with 1 addition and 1 deletion.
2 changes: 1 addition & 1 deletion drivers/clk/renesas/clk-mstp.c
Original file line number Diff line number Diff line change
Expand Up @@ -341,7 +341,7 @@ void __init cpg_mstp_add_clk_domain(struct device_node *np)
return;

pd->name = np->name;
pd->flags = GENPD_FLAG_PM_CLK;
pd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ACTIVE_WAKEUP;
pd->attach_dev = cpg_mstp_attach_dev;
pd->detach_dev = cpg_mstp_detach_dev;
pm_genpd_init(pd, &pm_domain_always_on_gov, false);
Expand Down

0 comments on commit 744dddc

Please sign in to comment.