[PATCH RFC 3/3] Update current cpu power when cpu freq change for exynos.

[Konstantin Krivyakin]

Signed-off-by: Konstantin Krivyakin <k.krivya...@samsung.com>
---
 drivers/cpufreq/exynos-cpufreq.c     |    2 ++
 drivers/cpufreq/exynos-cpufreq.h     |    1 +
 drivers/cpufreq/exynos4x12-cpufreq.c |   19 ++++++++++++++++++-
 3 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 0d32f02..02f17bc 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -178,6 +178,8 @@ static int exynos_target(struct cpufreq_policy *policy,
        }
 
        new_freq = freq_table[index].frequency;
+       if (exynos_info->power_table)
+               policy->current_power = exynos_info->power_table[index];
 
        ret = exynos_cpufreq_scale(new_freq);
 
diff --git a/drivers/cpufreq/exynos-cpufreq.h b/drivers/cpufreq/exynos-cpufreq.h
index 92b852e..64f964f 100644
--- a/drivers/cpufreq/exynos-cpufreq.h
+++ b/drivers/cpufreq/exynos-cpufreq.h
@@ -38,6 +38,7 @@ struct exynos_dvfs_info {
        unsigned int    pll_safe_idx;
        struct clk      *cpu_clk;
        unsigned int    *volt_table;
+       u64             *power_table;
        struct cpufreq_frequency_table  *freq_table;
        void (*set_freq)(unsigned int, unsigned int);
        bool (*need_apll_change)(unsigned int, unsigned int);
diff --git a/drivers/cpufreq/exynos4x12-cpufreq.c 
b/drivers/cpufreq/exynos4x12-cpufreq.c
index 08b7477..8905f9b 100644
--- a/drivers/cpufreq/exynos4x12-cpufreq.c
+++ b/drivers/cpufreq/exynos4x12-cpufreq.c
@@ -219,6 +219,7 @@ static void exynos4x12_set_frequency(unsigned int old_index,
 int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
 {
        unsigned long rate;
+       int freq_count;
 
        cpu_clk = clk_get(NULL, "armclk");
        if (IS_ERR(cpu_clk))
@@ -252,8 +253,24 @@ int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
        info->set_freq = exynos4x12_set_frequency;
        info->need_apll_change = exynos4x12_pms_change;
 
-       return 0;
+       freq_count = sizeof(exynos4x12_freq_table) /
+               sizeof(struct cpufreq_frequency_table);
+       info->power_table = kzalloc(sizeof(u64) * freq_count, GFP_KERNEL);
+       if (!info->power_table)
+               goto err_power_table;
+
+       for (i = 0; i <= freq_count; ++i) {
+               u64 freq = info->freq_table[i].frequency;
+               u64 volt = info->volt_table[i];
 
+               do_div(freq, 1000);
+               do_div(volt, 1000);
+               info->power_table[i] = freq * volt * volt;
+       }
+
+       return 0;
+err_power_table:
+       clk_put(mout_appl);
 err_mout_apll:
        clk_put(mout_mpll);
 err_mout_mpll:
-- 
1.7.9.5

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