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Subject[PATCH RFC 3/3] Update current cpu power when cpu freq change for exynos.
Date
Signed-off-by: Konstantin Krivyakin <k.krivyakin@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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