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Commit 62020f23 authored by Tony Lindgren's avatar Tony Lindgren
Browse files

bus: ti-sysc: Add suspend and resume handling 



This allows us to idle the module on suspend after the children
are suspended.

Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 2c355ff6

drivers/bus/ti-sysc.c

+34 −0
Original line number Original line Diff line number Diff line
@@ -58,6 +58,7 @@ static const char * const clock_names[] = { "fck", "ick", }; 
 * @cfg: interconnect target module configuration

 * @cfg: interconnect target module configuration

 * @name: name if available

 * @name: name if available

 * @revision: interconnect target module revision

 * @revision: interconnect target module revision

 * @needs_resume: runtime resume needed on resume from suspend

 */

 */

struct sysc {

struct sysc {

	struct device *dev;

	struct device *dev;
@@ -71,6 +72,8 @@ struct sysc { 
	struct sysc_config cfg;

	struct sysc_config cfg;

	const char *name;

	const char *name;

	u32 revision;

	u32 revision;

	bool enabled;

	bool needs_resume;

};

};





static u32 sysc_read(struct sysc *ddata, int offset)

static u32 sysc_read(struct sysc *ddata, int offset)
@@ -497,7 +500,38 @@ static int __maybe_unused sysc_runtime_resume(struct device *dev) 
	return 0;

	return 0;

}

}





#ifdef CONFIG_PM_SLEEP

static int sysc_suspend(struct device *dev)

{

	struct sysc *ddata;



	ddata = dev_get_drvdata(dev);



	if (!ddata->enabled)

		return 0;



	ddata->needs_resume = true;



	return sysc_runtime_suspend(dev);

}



static int sysc_resume(struct device *dev)

{

	struct sysc *ddata;



	ddata = dev_get_drvdata(dev);

	if (ddata->needs_resume) {

		ddata->needs_resume = false;



		return sysc_runtime_resume(dev);

	}



	return 0;

}

#endif



static const struct dev_pm_ops sysc_pm_ops = {

static const struct dev_pm_ops sysc_pm_ops = {

	SET_SYSTEM_SLEEP_PM_OPS(sysc_suspend, sysc_resume)

	SET_RUNTIME_PM_OPS(sysc_runtime_suspend,

	SET_RUNTIME_PM_OPS(sysc_runtime_suspend,

			   sysc_runtime_resume,

			   sysc_runtime_resume,

			   NULL)

			   NULL)