On R-Car H3, some power areas (e.g. A3VP) contain I/O devices, which are
also part of the CPG/MSSR Clock Domain. Hook up the CPG/MSSR Clock
Domain attach/detach callbacks to enable power management using module
clocks.
This also allows to support the Clock Domain for devices in the
"always-on" power area.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Cc: Michael Turquette <mturquette@xxxxxxxxxxxx>
Cc: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
---
v3:
- Hook up the CPG/MSSR Clock Domain attach/detach callbacks instead of
using our own copies,
v2:
- New.
---
drivers/soc/renesas/rcar-sysc.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/soc/renesas/rcar-sysc.c b/drivers/soc/renesas/rcar-sysc.c
index 28af0b704fc008d2..2d6fbeb481883be7 100644
--- a/drivers/soc/renesas/rcar-sysc.c
+++ b/drivers/soc/renesas/rcar-sysc.c
@@ -9,6 +9,7 @@
* for more details.
*/
+#include <linux/clk/renesas.h>
#include <linux/delay.h>
#include <linux/err.h>
#include <linux/mm.h>
@@ -251,6 +252,15 @@ static void __init rcar_sysc_pd_setup(struct device_node *np,
gov = &pm_domain_always_on_gov;
}
+#ifdef CONFIG_ARCH_R8A7795
+ if (!(pd->flags & (PD_CPU | PD_SCU))) {
+ /* Enable Clock Domain for I/O devices */
+ genpd->flags = GENPD_FLAG_PM_CLK;
+ genpd->attach_dev = cpg_mssr_attach_dev;
+ genpd->detach_dev = cpg_mssr_detach_dev;
+ }
+#endif
+
pm_genpd_init(genpd, gov, false);
genpd->dev_ops.active_wakeup = rcar_sysc_active_wakeup;
genpd->power_off = rcar_sysc_pd_power_off;
--
1.9.1
