linux-kernel - [RFC PATCH 09/11] cpufreq: spear-cpufreq: remove device tree parsing for cpu nodes

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Message-Id: <1373883732-26303-10-git-send-email-Sudeep.KarkadaNagesha@arm.com>
Date:	Mon, 15 Jul 2013 11:22:10 +0100
From:	Sudeep.KarkadaNagesha@....com
To:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Cc:	cpufreq@...r.kernel.org, arnd@...db.de, olof@...om.net,
	lorenzo.pieralisi@....com, rob.herring@...xeda.com,
	grant.likely@...aro.org, rjw@...k.pl, viresh.kumar@...aro.org,
	gregkh@...uxfoundation.org, gregory.clement@...e-electrons.com,
	kernel@...gutronix.de, shawn.guo@...aro.org,
	linux@....linux.org.uk,
	Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>
Subject: [RFC PATCH 09/11] cpufreq: spear-cpufreq: remove device tree parsing for cpu nodes

From: Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>

Now that the cpu device registration initialises the of_node(if available)
appropriately for all the cpus, parsing here is redundant.

This patch removes all DT parsing and uses cpu->of_node instead.

Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@....com>
---
 drivers/cpufreq/spear-cpufreq.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c
index c3efa7f..eb73c47 100644
--- a/drivers/cpufreq/spear-cpufreq.c
+++ b/drivers/cpufreq/spear-cpufreq.c
@@ -14,6 +14,7 @@
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/clk.h>
+#include <linux/cpu.h>
 #include <linux/cpufreq.h>
 #include <linux/err.h>
 #include <linux/init.h>
@@ -218,12 +219,19 @@ static struct cpufreq_driver spear_cpufreq_driver = {
 static int spear_cpufreq_driver_init(void)
 {
 	struct device_node *np;
+	struct device *cpu_dev;
 	const struct property *prop;
 	struct cpufreq_frequency_table *freq_tbl;
 	const __be32 *val;
 	int cnt, i, ret;
 
-	np = of_find_node_by_path("/cpus/cpu@0");
+	cpu_dev = get_cpu_device(0);
+	if (!cpu_dev) {
+		pr_err("failed to get cpu device\n");
+		return -ENODEV;
+	}
+
+	np = of_node_get(cpu_dev->of_node);
 	if (!np) {
 		pr_err("No cpu node found");
 		return -ENODEV;
-- 
1.8.1.2


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