[CELL] cbe_cpufreq: fix minor issues

Minor issues have been fixed:
* added a missing call to of_node_put()
* signedness of a function parameter
* added some line breaks
* changed global pmi_frequency_limit to a
  per node pmi_slow_mode_limit array

Signed-off-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>

1 files changed, 40 insertions, 18 deletions

diff --git a/arch/powerpc/platforms/cell/cbe_cpufreq.c b/arch/powerpc/platforms/cell/cbe_cpufreq.c
index 3a26b3c115b9..a62562ee1461 100644
--- a/arch/powerpc/platforms/cell/cbe_cpufreq.c
+++ b/arch/powerpc/platforms/cell/cbe_cpufreq.c
@@ -67,7 +67,7 @@ static u64 MIC_Slow_Next_Timer_table[] = {
         0x00003FC000000000ull,
 };
 
-static unsigned int pmi_frequency_limit = 0;
+static u8 pmi_slow_mode_limit[MAX_BE];
 
 /*
  * hardware specific functions
@@ -169,35 +169,50 @@ static int set_pmode_reg(int cpu, unsigned int pmode)
 
 static int set_pmode(int cpu, unsigned int slow_mode)
 {
+        int rc;
 #ifdef CONFIG_PPC_PMI
         if (cbe_cpufreq_has_pmi)
-                return set_pmode_pmi(cpu, slow_mode);
+                rc = set_pmode_pmi(cpu, slow_mode);
+        else
 #endif
-        return set_pmode_reg(cpu, slow_mode);
+                rc = set_pmode_reg(cpu, slow_mode);
+
+        pr_debug("register contains slow mode %d\n", get_pmode(cpu));
+
+        return rc;
 }
 
 static void cbe_cpufreq_handle_pmi(pmi_message_t pmi_msg)
 {
-        u8 cpu;
-        u8 cbe_pmode_new;
+        u8 node; slow_mode;
 
         BUG_ON(pmi_msg.type != PMI_TYPE_FREQ_CHANGE);
 
-        cpu = cbe_node_to_cpu(pmi_msg.data1);
-        cbe_pmode_new = pmi_msg.data2;
+        node = pmi_msg.data1;
+        slow_mode = pmi_msg.data2;
 
-        pmi_frequency_limit = cbe_freqs[cbe_pmode_new].frequency;
+        pmi_slow_mode_limit[node] = slow_mode;
 
-        pr_debug("cbe_handle_pmi: max freq=%d\n", pmi_frequency_limit);
+        pr_debug("cbe_handle_pmi: node: %d, max slow_mode=%d\n", slow_mode);
 }
 
 static int pmi_notifier(struct notifier_block *nb,
                                        unsigned long event, void *data)
 {
         struct cpufreq_policy *policy = data;
+        u8 node;
+
+        node = cbe_cpu_to_node(policy->cpu);
+
+        pr_debug("got notified, event=%lu, node=%u\n", event, node);
 
-        if (pmi_frequency_limit)
-                cpufreq_verify_within_limits(policy, 0, pmi_frequency_limit);
+        if (pmi_slow_mode_limit[node] != 0) {
+                pr_debug("limiting node %d to slow mode %d\n",
+                         node, pmi_slow_mode_limit[node]);
+
+                cpufreq_verify_within_limits(policy, 0,
+                         cbe_freqs[pmi_slow_mode_limit[node]].frequency);
+        }
 
         return 0;
 }
@@ -232,6 +247,8 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
         max_freqp = of_get_property(cpu, "clock-frequency", NULL);
 
+        of_node_put(cpu);
+
         if (!max_freqp)
                 return -EINVAL;
 
@@ -248,7 +265,9 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
         }
 
         policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-        /* if DEBUG is enabled set_pmode() measures the correct latency of a transition */
+
+        /* if DEBUG is enabled set_pmode() measures the latency
+         * of a transition */
         policy->cpuinfo.transition_latency = 25000;
 
         cur_pmode = get_pmode(policy->cpu);
@@ -262,8 +281,8 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
         cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu);
 
-
-        /* this ensures that policy->cpuinfo_min and policy->cpuinfo_max are set correctly */
+        /* this ensures that policy->cpuinfo_min
+         * and policy->cpuinfo_max are set correctly */
         return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs);
 }
 
@@ -279,12 +298,13 @@ static int cbe_cpufreq_verify(struct cpufreq_policy *policy)
 }
 
 
-static int cbe_cpufreq_target(struct cpufreq_policy *policy, unsigned int target_freq,
-                            unsigned int relation)
+static int cbe_cpufreq_target(struct cpufreq_policy *policy,
+                              unsigned int target_freq,
+                              unsigned int relation)
 {
         int rc;
         struct cpufreq_freqs freqs;
-        int cbe_pmode_new;
+        unsigned int cbe_pmode_new;
 
         cpufreq_frequency_table_target(policy,
                                        cbe_freqs,
@@ -299,12 +319,14 @@ static int cbe_cpufreq_target(struct cpufreq_policy *policy, unsigned int target
         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",
+        pr_debug("setting frequency for cpu %d to %d kHz, " \
+                 "1/%d of max frequency\n",
                  policy->cpu,
                  cbe_freqs[cbe_pmode_new].frequency,
                  cbe_freqs[cbe_pmode_new].index);
 
         rc = set_pmode(policy->cpu, cbe_pmode_new);
+
         cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
         mutex_unlock(&cbe_switch_mutex);