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cpufreq: rockchip: change the frequency of cci400 dynamically

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when the frequency of big cluster and little cluster are bigger then
600MHz, set the frequency of cci400 to 576MHz, otherwise set the
frequency of cci400 to 288MHz.

Change-Id: I9e28b51bfdfcaf62464b8511c731fa2cd0ed5d9d
Signed-off-by: Xiao Feng <xf@rock-chips.com>
This commit is contained in:
Xiao Feng
2015-08-27 12:03:55 +08:00
committed by Gerrit Code Review
parent 34987d9cf3
commit 6f24014f96
1 changed files with 64 additions and 0 deletions
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64
drivers/cpufreq/rockchip_big_little.c
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@@ -68,6 +68,9 @@ static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS];
#define DISABLE_FURTHER_CPUFREQ 0x10
#define ENABLE_FURTHER_CPUFREQ 0x20
#define MASK_FURTHER_CPUFREQ 0x30
#define CPU_LOW_FREQ 600000 /* KHz */
#define CCI_LOW_RATE 288000000 /* Hz */
#define CCI_HIGH_RATE 576000000 /* Hz */
/* With 0x00(NOCHANGE), it depends on the previous "further" status */
#define CPUFREQ_PRIVATE 0x100
static unsigned int no_cpufreq_access[MAX_CLUSTERS] = { 0 };
@@ -82,6 +85,9 @@ static struct dvfs_node *clk_cpu_dvfs_node[MAX_CLUSTERS];
static struct dvfs_node *clk_gpu_dvfs_node;
static struct dvfs_node *clk_ddr_dvfs_node;
static cpumask_var_t cluster_policy_mask[MAX_CLUSTERS];
static struct clk *aclk_cci;
static unsigned long cci_rate;
static unsigned int cpu_bl_freq[MAX_CLUSTERS];
#ifdef CONFIG_ROCKCHIP_CPUQUIET
static void rockchip_bl_balanced_cpufreq_transition(unsigned int cluster,
@@ -163,6 +169,51 @@ static struct notifier_block notifier_policy_block = {
.notifier_call = rockchip_bl_cpufreq_notifier_policy
};
static int rockchip_bl_cpufreq_notifier_trans(struct notifier_block *nb,
unsigned long val, void *data)
{
struct cpufreq_freqs *freq = data;
unsigned int cluster = cpu_to_cluster(freq->cpu);
int ret;
cpu_bl_freq[cluster] = freq->new;
switch (val) {
case CPUFREQ_PRECHANGE:
if (cpu_bl_freq[B_CLUSTER] > CPU_LOW_FREQ ||
cpu_bl_freq[L_CLUSTER] > CPU_LOW_FREQ) {
if (cci_rate != CCI_HIGH_RATE) {
ret = clk_set_rate(aclk_cci, CCI_HIGH_RATE);
if (ret)
break;
pr_debug("ccirate %ld-->%d Hz\n",
cci_rate, CCI_HIGH_RATE);
cci_rate = CCI_HIGH_RATE;
}
}
break;
case CPUFREQ_POSTCHANGE:
if (cpu_bl_freq[B_CLUSTER] <= CPU_LOW_FREQ &&
cpu_bl_freq[L_CLUSTER] <= CPU_LOW_FREQ) {
if (cci_rate != CCI_LOW_RATE) {
ret = clk_set_rate(aclk_cci, CCI_LOW_RATE);
if (ret)
break;
pr_debug("ccirate %ld-->%d Hz\n",
cci_rate, CCI_LOW_RATE);
cci_rate = CCI_LOW_RATE;
}
}
break;
}
return 0;
}
static struct notifier_block notifier_trans_block = {
.notifier_call = rockchip_bl_cpufreq_notifier_trans,
};
static int rockchip_bl_cpufreq_verify(struct cpufreq_policy *policy)
{
u32 cur_cluster = cpu_to_cluster(policy->cpu);
@@ -275,6 +326,19 @@ static int rockchip_bl_cpufreq_init_cpu0(struct cpufreq_policy *policy)
cpufreq_register_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
aclk_cci = clk_get(NULL, "aclk_cci");
if (!IS_ERR(aclk_cci)) {
cci_rate = clk_get_rate(aclk_cci);
if (clk_cpu_dvfs_node[L_CLUSTER])
cpu_bl_freq[L_CLUSTER] =
clk_get_rate(clk_cpu_dvfs_node[L_CLUSTER]->clk) / 1000;
if (clk_cpu_dvfs_node[B_CLUSTER])
cpu_bl_freq[B_CLUSTER] =
clk_get_rate(clk_cpu_dvfs_node[B_CLUSTER]->clk) / 1000;
cpufreq_register_notifier(&notifier_trans_block,
CPUFREQ_TRANSITION_NOTIFIER);
}
pr_info("version " VERSION ", suspend freq %d %d MHz\n",
suspend_freq[0] / 1000, suspend_freq[1] / 1000);
return 0;