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rk30:sdk: store clock request frequency and auto scale frequency when limit clock frequency

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This commit is contained in:
chenxing
2012-07-06 15:09:02 +08:00
parent 33212cdac1
commit f0a1404739
2 changed files with 35 additions and 4 deletions
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32
arch/arm/mach-rk30/dvfs.c
View File

@@ -102,25 +102,52 @@ struct regulator* dvfs_get_regulator(char *regulator_name)
return NULL;
}
int dvfs_clk_enable_limit(struct clk *clk, unsigned int min_rate, unsigned max_rate)
int dvfs_clk_enable_limit(struct clk *clk, unsigned int min_rate, unsigned int max_rate)
{
struct clk_node* dvfs_clk;
if (!clk->dvfs_info) {
DVFS_ERR("%s bad dvfs clock\n", __func__);
return -1;
}
dvfs_clk = clk->dvfs_info;
dvfs_clk->freq_limit_en = 1;
dvfs_clk->min_rate = min_rate;
dvfs_clk->max_rate = max_rate;
if (!dvfs_clk->enable_dvfs) {
DVFS_ERR("%s dvfs not enable yet\n", __func__);
return -1;
}
if (dvfs_clk->req_freq != 0)
dvfs_set_rate(clk, dvfs_clk->req_freq);
else
dvfs_set_rate(clk, dvfs_clk->set_freq);
return 0;
}
int dvfs_clk_disable_limit(struct clk *clk)
{
struct clk_node* dvfs_clk;
if (!clk->dvfs_info) {
DVFS_ERR("%s bad dvfs clock\n", __func__);
return -1;
}
dvfs_clk = clk->dvfs_info;
dvfs_clk->freq_limit_en = 0;
if (!dvfs_clk->enable_dvfs) {
DVFS_ERR("%s dvfs not enable yet\n", __func__);
return -1;
}
if (dvfs_clk->req_freq != 0)
dvfs_set_rate(clk, dvfs_clk->req_freq);
else
dvfs_set_rate(clk, dvfs_clk->set_freq);
return 0;
}
@@ -543,6 +570,7 @@ static int rk_regist_clk(struct clk_node *dvfs_clk)
return -1;
mutex_lock(&mutex);
dvfs_clk->enable_dvfs = 0;
dvfs_clk->req_freq = 0;
dvfs_clk->vd = dvfs_clk->pds[0].pd->vd;
for (i = 0; dvfs_clk->pds[i].pd != NULL; i++) {
child = &(dvfs_clk->pds[i].clk_list);
@@ -728,6 +756,7 @@ int dvfs_target_core(struct clk *clk, unsigned long rate_hz)
return -1;
}
dvfs_clk->req_freq = rate_hz;
/* Check limit rate */
if (dvfs_clk->freq_limit_en) {
if (rate_hz < dvfs_clk->min_rate) {
@@ -874,6 +903,7 @@ int dvfs_target_cpu(struct clk *clk, unsigned long rate_hz)
return -1;
}
dvfs_clk->req_freq = rate_hz;
/* Check limit rate */
if (dvfs_clk->freq_limit_en) {
if (rate_hz < dvfs_clk->min_rate) {

7
arch/arm/mach-rk30/include/mach/dvfs.h
View File

@@ -116,7 +116,8 @@ struct depend_lookup {
*/
struct clk_node {
char *name;
int set_freq; //KHZ
int req_freq; //KHZ, frequency request
int set_freq; //KHZ, frequency be set
int set_volt; //MV
int enable_dvfs;
int freq_limit_en; //sign if use limit frequency
@@ -151,7 +152,7 @@ int dvfs_set_freq_volt_table(struct clk *clk, struct cpufreq_frequency_table *ta
int dvfs_set_depend_table(struct clk *clk, char *vd_name, struct cpufreq_frequency_table *table);
int dvfs_set_arm_logic_volt(struct dvfs_arm_table *dvfs_cpu_logic_table, struct cpufreq_frequency_table *cpu_dvfs_table, struct cpufreq_frequency_table *dep_cpu2core_table);
struct regulator* dvfs_get_regulator(char *regulator_name);
int dvfs_clk_enable_limit(struct clk *clk, unsigned int min_rate, unsigned max_rate);
int dvfs_clk_enable_limit(struct clk *clk, unsigned int min_rate, unsigned int max_rate);
int dvfs_clk_disable_limit(struct clk *clk);
void avs_init(void);
@@ -170,7 +171,7 @@ static inline int dvfs_set_freq_volt_table(struct clk *clk, struct cpufreq_frequ
static inline int dvfs_set_depend_table(struct clk *clk, char *vd_name, struct cpufreq_frequency_table *table) {return 0;}
static inline int dvfs_set_arm_logic_volt(struct dvfs_arm_table *dvfs_cpu_logic_table, struct cpufreq_frequency_table *cpu_dvfs_table, struct cpufreq_frequency_table *dep_cpu2core_table){ return 0; }
static inline struct regulator* dvfs_get_regulator(char *regulator_name){ return NULL; }
static inline int dvfs_clk_enable_limit(struct clk *clk, unsigned int min_rate, unsigned max_rate){ return 0; }
static inline int dvfs_clk_enable_limit(struct clk *clk, unsigned int min_rate, unsigned int max_rate){ return 0; }
static inline int dvfs_clk_disable_limit(struct clk *clk){ return 0; };
static inline void avs_init(void){};