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bus: ti-sysc: Add suspend and resume handling

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

Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Tony Lindgren 2018-02-22 13:59:44 -08:00
parent 2c355ff6b6
commit 62020f2312
1 changed files with 34 additions and 0 deletions
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34
drivers/bus/ti-sysc.c
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@ -58,6 +58,7 @@ static const char * const clock_names[] = { "fck", "ick", };
* @cfg: interconnect target module configuration
* @name: name if available
* @revision: interconnect target module revision
* @needs_resume: runtime resume needed on resume from suspend
*/
struct sysc {
struct device *dev;
@ -71,6 +72,8 @@ struct sysc {
struct sysc_config cfg;
const char *name;
u32 revision;
bool enabled;
bool needs_resume;
};
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;
}
#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 = {
SET_SYSTEM_SLEEP_PM_OPS(sysc_suspend, sysc_resume)
SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
sysc_runtime_resume,
NULL)