cpufreq: arm_big_little_dt: Instantiate as platform_driver
As multiplatform build is being adopted by more and more ARM platforms, initcall function should be used very carefully. For example, when both arm_big_little_dt and cpufreq-cpu0 drivers are compiled in, arm_big_little_dt driver may try to register even if we had platform device for cpufreq-cpu0 registered. To eliminate this undesired the effect, the patch changes arm_big_little_dt driver to have it instantiated as a platform_driver. Then it will only run on platforms that create the platform_device "arm-bL-cpufreq-dt". Reported-and-tested-by: Rob Herring <robherring2@gmail.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -26,6 +26,7 @@
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/opp.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include "arm_big_little.h"
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@ -95,7 +96,7 @@ static struct cpufreq_arm_bL_ops dt_bL_ops = {
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.init_opp_table = dt_init_opp_table,
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};
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static int generic_bL_init(void)
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static int generic_bL_probe(struct platform_device *pdev)
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{
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struct device_node *np;
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@ -106,13 +107,22 @@ static int generic_bL_init(void)
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of_node_put(np);
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return bL_cpufreq_register(&dt_bL_ops);
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}
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module_init(generic_bL_init);
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static void generic_bL_exit(void)
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static int generic_bL_remove(struct platform_device *pdev)
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{
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return bL_cpufreq_unregister(&dt_bL_ops);
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bL_cpufreq_unregister(&dt_bL_ops);
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return 0;
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}
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module_exit(generic_bL_exit);
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static struct platform_driver generic_bL_platdrv = {
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.driver = {
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.name = "arm-bL-cpufreq-dt",
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.owner = THIS_MODULE,
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},
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.probe = generic_bL_probe,
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.remove = generic_bL_remove,
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};
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module_platform_driver(generic_bL_platdrv);
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MODULE_AUTHOR("Viresh Kumar <viresh.kumar@linaro.org>");
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MODULE_DESCRIPTION("Generic ARM big LITTLE cpufreq driver via DT");
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