diff options
| author | Tony Lindgren <tony@atomide.com> | 2018-02-22 13:59:44 -0800 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2018-02-26 14:16:10 -0800 |
| commit | 62020f231232215df73ca54669e38fe3f1d1b29a (patch) | |
| tree | 07ec3b8d3a6981dc06e5678e6f3b885905fccfec /drivers/bus | |
| parent | 2c355ff6b6ca6e0153cc6845aa004b9f5212d81e (diff) | |
| download | linux-0-day-62020f231232215df73ca54669e38fe3f1d1b29a.tar.gz linux-0-day-62020f231232215df73ca54669e38fe3f1d1b29a.tar.xz | |
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: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/ti-sysc.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c index 3ffe5446ff345..2bb0d0061624d 100644 --- a/drivers/bus/ti-sysc.c +++ b/drivers/bus/ti-sysc.c @@ -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) |