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ARM: tegra: cpufreq: move clk_get/put out of function tegra_cpu_init/exit 

tegra_cpu_init/exit will be called every time one cpu core is online or
offline. And all cpu cores share same clocks, redundant clk_get/put
wast time,  so I move them out.

Signed-off-by: Richard Zhao <linuxzsc@gmail.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Richard Zhao 2012-12-21 00:09:55 +00:00 committed by Stephen Warren
parent 45c9e59296
commit c26cefd089
1 changed files with 20 additions and 20 deletions
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40
arch/arm/mach-tegra/cpu-tegra.c
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@ -214,24 +214,6 @@ static int tegra_cpu_init(struct cpufreq_policy *policy)
if (policy->cpu >= NUM_CPUS)
return -EINVAL;
cpu_clk = clk_get_sys(NULL, "cpu");
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
pll_x_clk = clk_get_sys(NULL, "pll_x");
if (IS_ERR(pll_x_clk))
return PTR_ERR(pll_x_clk);
pll_p_clk = clk_get_sys(NULL, "pll_p");
if (IS_ERR(pll_p_clk))
return PTR_ERR(pll_p_clk);
emc_clk = clk_get_sys("cpu", "emc");
if (IS_ERR(emc_clk)) {
clk_put(cpu_clk);
return PTR_ERR(emc_clk);
}
clk_prepare_enable(emc_clk);
clk_prepare_enable(cpu_clk);
@ -256,8 +238,6 @@ static int tegra_cpu_exit(struct cpufreq_policy *policy)
{
cpufreq_frequency_table_cpuinfo(policy, freq_table);
clk_disable_unprepare(emc_clk);
clk_put(emc_clk);
clk_put(cpu_clk);
return 0;
}
@ -278,12 +258,32 @@ static struct cpufreq_driver tegra_cpufreq_driver = {
static int __init tegra_cpufreq_init(void)
{
cpu_clk = clk_get_sys(NULL, "cpu");
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
pll_x_clk = clk_get_sys(NULL, "pll_x");
if (IS_ERR(pll_x_clk))
return PTR_ERR(pll_x_clk);
pll_p_clk = clk_get_sys(NULL, "pll_p");
if (IS_ERR(pll_p_clk))
return PTR_ERR(pll_p_clk);
emc_clk = clk_get_sys("cpu", "emc");
if (IS_ERR(emc_clk)) {
clk_put(cpu_clk);
return PTR_ERR(emc_clk);
}
return cpufreq_register_driver(&tegra_cpufreq_driver);
}
static void __exit tegra_cpufreq_exit(void)
{
cpufreq_unregister_driver(&tegra_cpufreq_driver);
clk_put(emc_clk);
clk_put(cpu_clk);
}