[3/5] soc: renesas: rcar-sysc: Make rcar_sysc_init() init the PM domains

Commit Message

Simon Horman June 30, 2016, 2:16 p.m. UTC

From: Geert Uytterhoeven <[e-mail]>

Let rcar_sysc_init() trigger initialization of the SYSC PM domains from
DT if called before the early_initcall.
On failure, it falls back to mapping the passed register block, as
before.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Signed-off-by: Simon Horman <[e-mail]>
---
 drivers/soc/renesas/rcar-sysc.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

Patch

diff --git a/drivers/soc/renesas/rcar-sysc.c b/drivers/soc/renesas/rcar-sysc.c
index 59a8152681a5..68d6856c9d3c 100644
--- a/drivers/soc/renesas/rcar-sysc.c
+++ b/drivers/soc/renesas/rcar-sysc.c
@@ -164,15 +164,6 @@  static bool rcar_sysc_power_is_off(const struct rcar_sysc_ch *sysc_ch)
 	return false;
 }
 
-void __iomem *rcar_sysc_init(phys_addr_t base)
-{
-	rcar_sysc_base = ioremap_nocache(base, PAGE_SIZE);
-	if (!rcar_sysc_base)
-		panic("unable to ioremap R-Car SYSC hardware block\n");
-
-	return rcar_sysc_base;
-}
-
 struct rcar_sysc_pd {
 	struct generic_pm_domain genpd;
 	struct rcar_sysc_ch ch;
@@ -328,6 +319,9 @@  static int __init rcar_sysc_pd_init(void)
 	unsigned int i;
 	int error;
 
+	if (rcar_sysc_base)
+		return 0;
+
 	np = of_find_matching_node_and_match(NULL, rcar_sysc_matches, &match);
 	if (!np)
 		return -ENODEV;
@@ -405,3 +399,11 @@  out_put:
 	return error;
 }
 early_initcall(rcar_sysc_pd_init);
+
+void __iomem * __init rcar_sysc_init(phys_addr_t base)
+{
+	if (rcar_sysc_pd_init())
+		rcar_sysc_base = ioremap_nocache(base, PAGE_SIZE);
+
+	return rcar_sysc_base;
+}