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authorTony Lindgren <tony@atomide.com>2018-02-22 13:59:44 -0800
committerTony Lindgren <tony@atomide.com>2018-02-26 14:16:10 -0800
commit62020f231232215df73ca54669e38fe3f1d1b29a (patch)
tree07ec3b8d3a6981dc06e5678e6f3b885905fccfec /drivers/bus
parent2c355ff6b6ca6e0153cc6845aa004b9f5212d81e (diff)
downloadlinux-62020f231232215df73ca54669e38fe3f1d1b29a.tar.bz2
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.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
index 3ffe5446ff34..2bb0d0061624 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)