If a device is part of the 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/clk/renesas/renesas-cpg-mssr.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/clk/renesas/renesas-cpg-mssr.c b/drivers/clk/renesas/renesas-cpg-mssr.c
index e580a5e6346c2533..de534896f596168c 100644
--- a/drivers/clk/renesas/renesas-cpg-mssr.c
+++ b/drivers/clk/renesas/renesas-cpg-mssr.c
@@ -481,6 +481,11 @@ void cpg_mssr_detach_dev(struct generic_pm_domain *unused, struct device *dev)
pm_clk_destroy(dev);
}
+static bool cpg_mssr_active_wakeup(struct device *dev)
+{
+ return true;
+}
+
static int __init cpg_mssr_add_clk_domain(struct device *dev,
const unsigned int *core_pm_clks,
unsigned int num_core_pm_clks)
@@ -501,6 +506,7 @@ static int __init cpg_mssr_add_clk_domain(struct device *dev,
genpd = &pd->genpd;
genpd->name = np->name;
genpd->flags = GENPD_FLAG_PM_CLK;
+ genpd->dev_ops.active_wakeup = cpg_mssr_active_wakeup;
genpd->attach_dev = cpg_mssr_attach_dev;
genpd->detach_dev = cpg_mssr_detach_dev;
pm_genpd_init(genpd, &pm_domain_always_on_gov, false);
--
2.7.4
