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Commit d5303c22 authored by Vikram Mulukutla's avatar Vikram Mulukutla Committed by Anirudh Ghayal
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clk: qcom: clock-cpu-8939: Keep clocks prepared across suspend/resume 



Keep clocks prepared across suspend/resume since
regulator requests may fail when clocks are unprepared
during suspend, since regulator devices may be suspended.

Change-Id: Ica18a8bb535ea8af7684b0cc63ba3c38e6648085
Signed-off-by: default avatarVikram Mulukutla <markivx@codeaurora.org>
parent de4cd7bb

drivers/clk/qcom/clock-cpu-8939.c

+28 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ 
#include <linux/regulator/consumer.h>

#include <linux/of.h>

#include <linux/clk/msm-clock-generic.h>

#include <linux/suspend.h>

#include <soc/qcom/clock-local2.h>



#include <dt-bindings/clock/msm-cpu-clocks-8939.h>
@@ -293,6 +294,32 @@ static void config_pll(int mux_id) 
	return;

}



static int clock_8939_pm_event(struct notifier_block *this,

				unsigned long event, void *ptr)

{

	switch (event) {

	case PM_POST_HIBERNATION:

	case PM_POST_SUSPEND:

		clk_unprepare(&a53ssmux_lc.c);

		clk_unprepare(&a53ssmux_bc.c);

		clk_unprepare(&a53ssmux_cci.c);

		break;

	case PM_HIBERNATION_PREPARE:

	case PM_SUSPEND_PREPARE:

		clk_prepare(&a53ssmux_lc.c);

		clk_prepare(&a53ssmux_bc.c);

		clk_prepare(&a53ssmux_cci.c);

		break;

	default:

		break;

	}

	return NOTIFY_DONE;

}



static struct notifier_block clock_8939_pm_notifier = {

	.notifier_call = clock_8939_pm_event,

};



static int clock_a53_probe(struct platform_device *pdev)

{

	int speed_bin, version, rc, cpu, mux_id, rate;
@@ -358,6 +385,7 @@ static int clock_a53_probe(struct platform_device *pdev) 
		clk_prepare_enable(&a53ssmux_cci.c);

	}

	put_online_cpus();

	register_pm_notifier(&clock_8939_pm_notifier);

	return 0;

}