linux-kernel - [RFC 7/8] arm/clkdev: lookup clocks from OF clock providers

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Message-Id: <1320801583-12774-8-git-send-email-grant.likely@secretlab.ca>
Date:	Tue,  8 Nov 2011 18:19:42 -0700
From:	Grant Likely <grant.likely@...retlab.ca>
To:	devicetree-discuss@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org,
	Sascha Hauer <kernel@...gutronix.de>,
	Rob Herring <rob.herring@...xeda.com>
Cc:	linux-kernel@...r.kernel.org,
	Jeremy Kerr <jeremy.kerr@...onical.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: [RFC 7/8] arm/clkdev: lookup clocks from OF clock providers

From: Jeremy Kerr <jeremy.kerr@...onical.com>

Hook the OF clock provider infrastructure to clk_get.

Signed-off-by: Jeremy Kerr <jeremy.kerr@...onical.com>
Signed-off-by: Grant Likely <grant.likely@...retlab.ca>
---
 drivers/clk/clkdev.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index 6db161f..63f81c9 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -19,6 +19,8 @@
 #include <linux/mutex.h>
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/of.h>
+#include <linux/of_clk.h>
 
 static LIST_HEAD(clocks);
 static DEFINE_MUTEX(clocks_mutex);
@@ -78,6 +80,11 @@ EXPORT_SYMBOL(clk_get_sys);
 struct clk *clk_get(struct device *dev, const char *con_id)
 {
 	const char *dev_id = dev ? dev_name(dev) : NULL;
+	struct clk *clk;
+
+	clk = of_clk_get_by_name(dev->of_node, con_id);
+	if (clk && __clk_get(clk))
+		return clk;
 
 	return clk_get_sys(dev_id, con_id);
 }
-- 
1.7.5.4

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