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Commit c26cefd0 authored by Richard Zhao's avatar Richard Zhao Committed by Stephen Warren
Browse files

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: default avatarRichard Zhao <linuxzsc@gmail.com>
Signed-off-by: default avatarStephen Warren <swarren@nvidia.com>
parent 45c9e592

arch/arm/mach-tegra/cpu-tegra.c

+20 −20
Original line number Diff line number Diff line
@@ -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);

}