[POWERPC] cell: cbe_cpufreq cleanup and crash fix
cbe_cpufreq cleanups:
* comment format
* whitespace
* don't init on non-cell platforms
Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/cell/cbe_cpufreq.c b/arch/powerpc/platforms/cell/cbe_cpufreq.c
index 4495973..f9ac3fe 100644
--- a/arch/powerpc/platforms/cell/cbe_cpufreq.c
+++ b/arch/powerpc/platforms/cell/cbe_cpufreq.c
@@ -25,6 +25,7 @@
#include <asm/hw_irq.h>
#include <asm/io.h>
+#include <asm/machdep.h>
#include <asm/processor.h>
#include <asm/prom.h>
#include <asm/time.h>
@@ -155,7 +156,7 @@
}
static int set_pmode(int cpu, unsigned int slow_mode) {
- if(pmi_dev)
+ if (pmi_dev)
return set_pmode_pmi(cpu, slow_mode);
else
return set_pmode_reg(cpu, slow_mode);
@@ -167,7 +168,7 @@
u8 cpu;
u8 cbe_pmode_new;
- BUG_ON (pmi_msg.type != PMI_TYPE_FREQ_CHANGE);
+ BUG_ON(pmi_msg.type != PMI_TYPE_FREQ_CHANGE);
cpu = cbe_node_to_cpu(pmi_msg.data1);
cbe_pmode_new = pmi_msg.data2;
@@ -191,7 +192,7 @@
* cpufreq functions
*/
-static int cbe_cpufreq_cpu_init (struct cpufreq_policy *policy)
+static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
const u32 *max_freqp;
u32 max_freq;
@@ -200,7 +201,7 @@
cpu = of_get_cpu_node(policy->cpu, NULL);
- if(!cpu)
+ if (!cpu)
return -ENODEV;
pr_debug("init cpufreq on CPU %d\n", policy->cpu);
@@ -210,13 +211,13 @@
if (!max_freqp)
return -EINVAL;
- // we need the freq in kHz
+ /* we need the freq in kHz */
max_freq = *max_freqp / 1000;
pr_debug("max clock-frequency is at %u kHz\n", max_freq);
pr_debug("initializing frequency table\n");
- // initialize frequency table
+ /* initialize frequency table */
for (i=0; cbe_freqs[i].frequency!=CPUFREQ_TABLE_END; i++) {
cbe_freqs[i].frequency = max_freq / cbe_freqs[i].index;
pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
@@ -235,10 +236,10 @@
policy->cpus = cpu_sibling_map[policy->cpu];
#endif
- cpufreq_frequency_table_get_attr (cbe_freqs, policy->cpu);
+ cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu);
/* this ensures that policy->cpuinfo_min and policy->cpuinfo_max are set correctly */
- return cpufreq_frequency_table_cpuinfo (policy, cbe_freqs);
+ return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs);
}
static int cbe_cpufreq_cpu_exit(struct cpufreq_policy *policy)
@@ -270,7 +271,7 @@
freqs.new = cbe_freqs[cbe_pmode_new].frequency;
freqs.cpu = policy->cpu;
- mutex_lock (&cbe_switch_mutex);
+ mutex_lock(&cbe_switch_mutex);
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
pr_debug("setting frequency for cpu %d to %d kHz, 1/%d of max frequency\n",
@@ -303,6 +304,9 @@
{
struct device_node *np;
+ if (!machine_is(cell))
+ return -ENODEV;
+
np = of_find_node_by_type(NULL, "ibm,pmi");
pmi_dev = of_find_device_by_node(np);
@@ -315,7 +319,7 @@
static void __exit cbe_cpufreq_exit(void)
{
- if(pmi_dev)
+ if (pmi_dev)
pmi_unregister_handler(pmi_dev, &cbe_pmi_handler);
cpufreq_unregister_driver(&cbe_cpufreq_driver);