If an R-Car SYSC slave device is part of the CPG/MSTP or CPG/MSSR 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.
Hence provide an .active_wakeup() callback that always returns true.
Note that this will only affect devices configured as wakeup sources.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
drivers/soc/renesas/rcar-sysc.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/soc/renesas/rcar-sysc.c b/drivers/soc/renesas/rcar-sysc.c
index c8406e81640f6560..beb8b483a62abaca 100644
--- a/drivers/soc/renesas/rcar-sysc.c
+++ b/drivers/soc/renesas/rcar-sysc.c
@@ -194,6 +194,11 @@ static int rcar_sysc_pd_power_on(struct generic_pm_domain *genpd)
static bool has_cpg_mstp;
+static bool rcar_sysc_pd_active_wakeup(struct device *dev)
+{
+ return true;
+}
+
static void __init rcar_sysc_pd_setup(struct rcar_sysc_pd *pd)
{
struct generic_pm_domain *genpd = &pd->genpd;
@@ -225,6 +230,7 @@ static void __init rcar_sysc_pd_setup(struct rcar_sysc_pd *pd)
if (!(pd->flags & (PD_CPU | PD_SCU))) {
/* Enable Clock Domain for I/O devices */
genpd->flags |= GENPD_FLAG_PM_CLK;
+ genpd->dev_ops.active_wakeup = rcar_sysc_pd_active_wakeup;
if (has_cpg_mstp) {
genpd->attach_dev = cpg_mstp_attach_dev;
genpd->detach_dev = cpg_mstp_detach_dev;
--
2.7.4
