[PATCH 3/7] ARM: davinci: don't setup pm_clk if we're using genpd

[Bartosz Golaszewski <brgl@bgdev.pl>]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

As the first step in switching to using the genpd driver in DT mode,
check if a relevant genpd node exists and don't setup the clock pm in
this case.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 arch/arm/mach-davinci/pm_domain.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arch/arm/mach-davinci/pm_domain.c b/arch/arm/mach-davinci/pm_domain.c
index 78eac2c0c146..98a4f3fcba50 100644
--- a/arch/arm/mach-davinci/pm_domain.c
+++ b/arch/arm/mach-davinci/pm_domain.c
@@ -13,6 +13,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/pm_clock.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
 
 static struct dev_pm_domain davinci_pm_domain = {
 	.ops = {
@@ -28,7 +29,13 @@ static struct pm_clk_notifier_block platform_bus_notifier = {
 
 static int __init davinci_pm_runtime_init(void)
 {
-	pm_clk_add_notifier(&platform_bus_type, &platform_bus_notifier);
+	struct device_node *np;
+
+	/* Use pm_clk as fallback if we're not using genpd. */
+	np = of_find_compatible_node(NULL, NULL, "ti,davinci-pm-domains");
+	if (!np)
+		pm_clk_add_notifier(&platform_bus_type,
+				    &platform_bus_notifier);
 
 	return 0;
 }
-- 
2.16.1