linux-kernel - [PATCH 3/7] ARM: davinci: don't setup pm

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Date:   Wed,  7 Feb 2018 14:45:49 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        David Lechner <david@...hnology.com>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH 3/7] ARM: davinci: don't setup pm_clk if we're using genpd

From: Bartosz Golaszewski <bgolaszewski@...libre.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@...libre.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