Commit 1e21fd5a authored by Christian Krafft's avatar Christian Krafft Committed by Arnd Bergmann

[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: default avatarChristian Krafft <krafft@de.ibm.com>
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
parent e5ecc871
...@@ -67,7 +67,7 @@ static u64 MIC_Slow_Next_Timer_table[] = { ...@@ -67,7 +67,7 @@ static u64 MIC_Slow_Next_Timer_table[] = {
0x00003FC000000000ull, 0x00003FC000000000ull,
}; };
static unsigned int pmi_frequency_limit = 0; static u8 pmi_slow_mode_limit[MAX_BE];
/* /*
* hardware specific functions * hardware specific functions
...@@ -169,35 +169,50 @@ static int set_pmode_reg(int cpu, unsigned int pmode) ...@@ -169,35 +169,50 @@ static int set_pmode_reg(int cpu, unsigned int pmode)
static int set_pmode(int cpu, unsigned int slow_mode) static int set_pmode(int cpu, unsigned int slow_mode)
{ {
int rc;
#ifdef CONFIG_PPC_PMI #ifdef CONFIG_PPC_PMI
if (cbe_cpufreq_has_pmi) if (cbe_cpufreq_has_pmi)
return set_pmode_pmi(cpu, slow_mode); rc = set_pmode_pmi(cpu, slow_mode);
else
#endif #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) static void cbe_cpufreq_handle_pmi(pmi_message_t pmi_msg)
{ {
u8 cpu; u8 node; slow_mode;
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); node = pmi_msg.data1;
cbe_pmode_new = pmi_msg.data2; 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, static int pmi_notifier(struct notifier_block *nb,
unsigned long event, void *data) unsigned long event, void *data)
{ {
struct cpufreq_policy *policy = 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) if (pmi_slow_mode_limit[node] != 0) {
cpufreq_verify_within_limits(policy, 0, pmi_frequency_limit); 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; return 0;
} }
...@@ -232,6 +247,8 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) ...@@ -232,6 +247,8 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
max_freqp = of_get_property(cpu, "clock-frequency", NULL); max_freqp = of_get_property(cpu, "clock-frequency", NULL);
of_node_put(cpu);
if (!max_freqp) if (!max_freqp)
return -EINVAL; return -EINVAL;
...@@ -248,7 +265,9 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) ...@@ -248,7 +265,9 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
} }
policy->governor = CPUFREQ_DEFAULT_GOVERNOR; 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; policy->cpuinfo.transition_latency = 25000;
cur_pmode = get_pmode(policy->cpu); cur_pmode = get_pmode(policy->cpu);
...@@ -262,8 +281,8 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy) ...@@ -262,8 +281,8 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu); cpufreq_frequency_table_get_attr(cbe_freqs, policy->cpu);
/* this ensures that policy->cpuinfo_min
/* this ensures that policy->cpuinfo_min and policy->cpuinfo_max are set correctly */ * and policy->cpuinfo_max are set correctly */
return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs); return cpufreq_frequency_table_cpuinfo(policy, cbe_freqs);
} }
...@@ -279,12 +298,13 @@ static int cbe_cpufreq_verify(struct cpufreq_policy *policy) ...@@ -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, static int cbe_cpufreq_target(struct cpufreq_policy *policy,
unsigned int relation) unsigned int target_freq,
unsigned int relation)
{ {
int rc; int rc;
struct cpufreq_freqs freqs; struct cpufreq_freqs freqs;
int cbe_pmode_new; unsigned int cbe_pmode_new;
cpufreq_frequency_table_target(policy, cpufreq_frequency_table_target(policy,
cbe_freqs, cbe_freqs,
...@@ -299,12 +319,14 @@ static int cbe_cpufreq_target(struct cpufreq_policy *policy, unsigned int target ...@@ -299,12 +319,14 @@ static int cbe_cpufreq_target(struct cpufreq_policy *policy, unsigned int target
mutex_lock(&cbe_switch_mutex); mutex_lock(&cbe_switch_mutex);
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); 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, policy->cpu,
cbe_freqs[cbe_pmode_new].frequency, cbe_freqs[cbe_pmode_new].frequency,
cbe_freqs[cbe_pmode_new].index); cbe_freqs[cbe_pmode_new].index);
rc = set_pmode(policy->cpu, cbe_pmode_new); rc = set_pmode(policy->cpu, cbe_pmode_new);
cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
mutex_unlock(&cbe_switch_mutex); mutex_unlock(&cbe_switch_mutex);
......
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