From ecbef17adbbbe89eb6b3e4d4e5b756d63041319c Mon Sep 17 00:00:00 2001
From: Paul Mundt <lethal@linux-sh.org>
Date: Fri, 27 Jan 2012 19:44:49 +0900
Subject: sh: cpufreq: struct device lookup from CPU topology.

The struct device pointer associated with the CPU we're on can be fetched
via the topology information. Tie this in to localize the CPU clock
lookup. While we're at it, tidy up some of the debug/info printing
notices too.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
---
 arch/sh/kernel/cpufreq.c | 27 +++++++++++++++++----------
 1 file changed, 17 insertions(+), 10 deletions(-)

(limited to 'arch/sh')

diff --git a/arch/sh/kernel/cpufreq.c b/arch/sh/kernel/cpufreq.c
index 8203865e16b7..66dbb74546c3 100644
--- a/arch/sh/kernel/cpufreq.c
+++ b/arch/sh/kernel/cpufreq.c
@@ -14,6 +14,8 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  */
+#define pr_fmt(fmt) "cpufreq: " fmt
+
 #include <linux/types.h>
 #include <linux/cpufreq.h>
 #include <linux/kernel.h>
@@ -21,6 +23,7 @@
 #include <linux/init.h>
 #include <linux/err.h>
 #include <linux/cpumask.h>
+#include <linux/cpu.h>
 #include <linux/smp.h>
 #include <linux/sched.h>	/* set_cpus_allowed() */
 #include <linux/clk.h>
@@ -45,6 +48,7 @@ static int sh_cpufreq_target(struct cpufreq_policy *policy,
 	struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
 	cpumask_t cpus_allowed;
 	struct cpufreq_freqs freqs;
+	struct device *dev;
 	long freq;
 
 	if (!cpu_online(cpu))
@@ -55,13 +59,15 @@ static int sh_cpufreq_target(struct cpufreq_policy *policy,
 
 	BUG_ON(smp_processor_id() != cpu);
 
+	dev = get_cpu_device(cpu);
+
 	/* Convert target_freq from kHz to Hz */
 	freq = clk_round_rate(cpuclk, target_freq * 1000);
 
 	if (freq < (policy->min * 1000) || freq > (policy->max * 1000))
 		return -EINVAL;
 
-	pr_debug("cpufreq: requested frequency %u Hz\n", target_freq * 1000);
+	dev_dbg(dev, "requested frequency %u Hz\n", target_freq * 1000);
 
 	freqs.cpu	= cpu;
 	freqs.old	= sh_cpufreq_get(cpu);
@@ -73,7 +79,7 @@ static int sh_cpufreq_target(struct cpufreq_policy *policy,
 	clk_set_rate(cpuclk, freq);
 	cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
 
-	pr_debug("cpufreq: set frequency %lu Hz\n", freq);
+	dev_dbg(dev, "set frequency %lu Hz\n", freq);
 
 	return 0;
 }
@@ -82,13 +88,16 @@ static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
 	unsigned int cpu = policy->cpu;
 	struct clk *cpuclk = &per_cpu(sh_cpuclk, cpu);
+	struct device *dev;
 
 	if (!cpu_online(cpu))
 		return -ENODEV;
 
-	cpuclk = clk_get(NULL, "cpu_clk");
+	dev = get_cpu_device(cpu);
+
+	cpuclk = clk_get(dev, "cpu_clk");
 	if (IS_ERR(cpuclk)) {
-		printk(KERN_ERR "cpufreq: couldn't get CPU#%d clk\n", cpu);
+		dev_err(dev, "couldn't get CPU clk\n");
 		return PTR_ERR(cpuclk);
 	}
 
@@ -106,16 +115,14 @@ static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
 	 * properly to support scaling.
 	 */
 	if (unlikely(policy->min == policy->max)) {
-		printk(KERN_ERR "cpufreq: clock framework rate rounding "
-		       "not supported on CPU#%d.\n", cpu);
-
+		dev_err(dev, "rate rounding not supported on this CPU.\n");
 		clk_put(cpuclk);
 		return -EINVAL;
 	}
 
-	printk(KERN_INFO "cpufreq: CPU#%d Frequencies - Minimum %u.%03u MHz, "
+	dev_info(dev, "CPU Frequencies - Minimum %u.%03u MHz, "
 	       "Maximum %u.%03u MHz.\n",
-	       cpu, policy->min / 1000, policy->min % 1000,
+	       policy->min / 1000, policy->min % 1000,
 	       policy->max / 1000, policy->max % 1000);
 
 	return 0;
@@ -147,7 +154,7 @@ static struct cpufreq_driver sh_cpufreq_driver = {
 
 static int __init sh_cpufreq_module_init(void)
 {
-	printk(KERN_INFO "cpufreq: SuperH CPU frequency driver.\n");
+	pr_notice("SuperH CPU frequency driver.\n");
 	return cpufreq_register_driver(&sh_cpufreq_driver);
 }
 
-- 
cgit v1.2.3