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>

diff --git a/arch/arm/mach-tegra/cpu-tegra.c b/arch/arm/mach-tegra/cpu-tegra.c
index a74d3c7d2e26836beac265f15db1c3c69b1575c7..85d4a23bba039e1ce18372dcb283eea1a53f964c 100644 (file)
--- a/arch/arm/mach-tegra/cpu-tegra.c
+++ b/arch/arm/mach-tegra/cpu-tegra.c
@@ -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);
 }