Re: [PATCH RFC 3/3] Update current cpu power when cpu freq change for exynos.
From: Kyungmin Park
Date: Thu Jul 04 2013 - 20:51:19 EST
+ cpufreq maintainers
On Fri, Jul 5, 2013 at 12:17 AM, Konstantin Krivyakin
<k.krivyakin@xxxxxxxxxxx> wrote:
>
Signed-off-by: Konstantin Krivyakin <k.krivyakin@xxxxxxxxxxx>
>
---
>
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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