@@ -5,6 +5,7 @@
#include <linux/bitfield.h>
#include <linux/cpufreq.h>
+#include <linux/energy_model.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
@@ -17,9 +18,10 @@
#define LUT_ROW_SIZE 0x4
enum {
- REG_LUT_TABLE,
- REG_ENABLE,
- REG_PERF_STATE,
+ REG_FREQ_LUT_TABLE,
+ REG_FREQ_ENABLE,
+ REG_FREQ_PERF_STATE,
+ REG_EM_POWER_TBL,
REG_ARRAY_SIZE,
};
@@ -27,23 +29,44 @@ enum {
struct cpufreq_mtk {
struct cpufreq_frequency_table *table;
void __iomem *reg_bases[REG_ARRAY_SIZE];
+ int nr_opp;
cpumask_t related_cpus;
};
static const u16 cpufreq_mtk_offsets[REG_ARRAY_SIZE] = {
- [REG_LUT_TABLE] = 0x0,
- [REG_ENABLE] = 0x84,
- [REG_PERF_STATE] = 0x88,
+ [REG_FREQ_LUT_TABLE] = 0x0,
+ [REG_FREQ_ENABLE] = 0x84,
+ [REG_FREQ_PERF_STATE] = 0x88,
+ [REG_EM_POWER_TBL] = 0x3D0,
};
static struct cpufreq_mtk *mtk_freq_domain_map[NR_CPUS];
+static int mtk_cpufreq_get_cpu_power(unsigned long *mW,
+ unsigned long *KHz, struct device *cpu_dev)
+{
+ struct cpufreq_mtk *c = mtk_freq_domain_map[cpu_dev->id];
+ int i;
+
+ for (i = 0; i < c->nr_opp; i++) {
+ if (c->table[i].frequency < *KHz)
+ break;
+ }
+ i--;
+
+ *KHz = c->table[i].frequency;
+ *mW = readl_relaxed(c->reg_bases[REG_EM_POWER_TBL] +
+ i * LUT_ROW_SIZE) / 1000;
+
+ return 0;
+}
+
static int mtk_cpufreq_hw_target_index(struct cpufreq_policy *policy,
unsigned int index)
{
struct cpufreq_mtk *c = policy->driver_data;
- writel_relaxed(index, c->reg_bases[REG_PERF_STATE]);
+ writel_relaxed(index, c->reg_bases[REG_FREQ_PERF_STATE]);
return 0;
}
@@ -55,7 +78,7 @@ static unsigned int mtk_cpufreq_hw_get(unsigned int cpu)
c = mtk_freq_domain_map[cpu];
- index = readl_relaxed(c->reg_bases[REG_PERF_STATE]);
+ index = readl_relaxed(c->reg_bases[REG_FREQ_PERF_STATE]);
index = min(index, LUT_MAX_ENTRIES - 1);
return c->table[index].frequency;
@@ -64,6 +87,14 @@ static unsigned int mtk_cpufreq_hw_get(unsigned int cpu)
static int mtk_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
{
struct cpufreq_mtk *c;
+ struct device *cpu_dev;
+ struct em_data_callback em_cb = EM_DATA_CB(mtk_cpufreq_get_cpu_power);
+
+ cpu_dev = get_cpu_device(policy->cpu);
+ if (!cpu_dev) {
+ pr_err("failed to get cpu%d device\n", policy->cpu);
+ return -ENODEV;
+ }
c = mtk_freq_domain_map[policy->cpu];
if (!c) {
@@ -77,7 +108,9 @@ static int mtk_cpufreq_hw_cpu_init(struct cpufreq_policy *policy)
policy->driver_data = c;
/* HW should be in enabled state to proceed now */
- writel_relaxed(0x1, c->reg_bases[REG_ENABLE]);
+ writel_relaxed(0x1, c->reg_bases[REG_FREQ_ENABLE]);
+
+ em_dev_register_perf_domain(cpu_dev, c->nr_opp, &em_cb, policy->cpus);
return 0;
}
@@ -93,7 +126,7 @@ static int mtk_cpufreq_hw_cpu_exit(struct cpufreq_policy *policy)
}
/* HW should be in paused state now */
- writel_relaxed(0x0, c->reg_bases[REG_ENABLE]);
+ writel_relaxed(0x0, c->reg_bases[REG_FREQ_ENABLE]);
return 0;
}
@@ -122,7 +155,7 @@ static int mtk_cpu_create_freq_table(struct platform_device *pdev,
if (!c->table)
return -ENOMEM;
- base_table = c->reg_bases[REG_LUT_TABLE];
+ base_table = c->reg_bases[REG_FREQ_LUT_TABLE];
for (i = 0; i < LUT_MAX_ENTRIES; i++) {
data = readl_relaxed(base_table + (i * LUT_ROW_SIZE));
@@ -140,6 +173,7 @@ static int mtk_cpu_create_freq_table(struct platform_device *pdev,
}
c->table[i].frequency = CPUFREQ_TABLE_END;
+ c->nr_opp = i;
return 0;
}
@@ -191,7 +225,7 @@ static int mtk_cpu_resources_init(struct platform_device *pdev,
if (IS_ERR(base))
return PTR_ERR(base);
- for (i = REG_LUT_TABLE; i < REG_ARRAY_SIZE; i++)
+ for (i = REG_FREQ_LUT_TABLE; i < REG_ARRAY_SIZE; i++)
c->reg_bases[i] = base + offsets[i];
ret = mtk_get_related_cpus(index, c);