cpu_pm: call notifiers during suspend
Implements syscore_ops in cpu_pm to call the cpu and cpu cluster notifiers during suspend and resume, allowing drivers receiving the notifications to avoid implementing syscore_ops. Signed-off-by: Colin Cross <ccross@android.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Tested-and-Acked-by: Shawn Guo <shawn.guo@linaro.org> Tested-by: Vishwanath BS <vishwanath.bs@ti.com>
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@ -20,6 +20,7 @@
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/notifier.h>
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#include <linux/notifier.h>
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#include <linux/spinlock.h>
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#include <linux/spinlock.h>
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#include <linux/syscore_ops.h>
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static DEFINE_RWLOCK(cpu_pm_notifier_lock);
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static DEFINE_RWLOCK(cpu_pm_notifier_lock);
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static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain);
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static RAW_NOTIFIER_HEAD(cpu_pm_notifier_chain);
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@ -198,3 +199,35 @@ int cpu_cluster_pm_exit(void)
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return ret;
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return ret;
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}
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}
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EXPORT_SYMBOL_GPL(cpu_cluster_pm_exit);
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EXPORT_SYMBOL_GPL(cpu_cluster_pm_exit);
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#ifdef CONFIG_PM
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static int cpu_pm_suspend(void)
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{
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int ret;
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ret = cpu_pm_enter();
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if (ret)
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return ret;
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ret = cpu_cluster_pm_enter();
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return ret;
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}
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static void cpu_pm_resume(void)
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{
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cpu_cluster_pm_exit();
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cpu_pm_exit();
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}
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static struct syscore_ops cpu_pm_syscore_ops = {
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.suspend = cpu_pm_suspend,
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.resume = cpu_pm_resume,
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};
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static int cpu_pm_init(void)
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{
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register_syscore_ops(&cpu_pm_syscore_ops);
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return 0;
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}
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core_initcall(cpu_pm_init);
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#endif
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