From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: Fri, 26 Feb 2016 15:54:31 +0000 (+0100)
Subject: clk: Ignore disabled DT clock providers
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=3e5dd6f6e690048d0fd1c913397506648724474e;p=openwrt%2Fstaging%2Fblogic.git

clk: Ignore disabled DT clock providers

of_clk_init() uses for_each_matching_node_and_match() to find clock
providers, which returns all matching device nodes, whether they are
enabled or not. Hence clock providers that are disabled explicitly in DT
using e.g.

	"status = "disabled";

are still activated.

Add a check to ignore device nodes that are not enabled, like
of_irq_init() does.

Reported-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 437eebf89fcf..b775c88ac36d 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3138,6 +3138,9 @@ void __init of_clk_init(const struct of_device_id *matches)
 	for_each_matching_node_and_match(np, matches, &match) {
 		struct clock_provider *parent;
 
+		if (!of_device_is_available(np))
+			continue;
+
 		parent = kzalloc(sizeof(*parent), GFP_KERNEL);
 		if (!parent) {
 			list_for_each_entry_safe(clk_provider, next,