Commit ef55f821 authored by Tony Lindgren's avatar Tony Lindgren

bus: ti-sysc: Improve suspend and resume handling

Based on testing with more devices I noticed that some devices
don't suspend or resume properly. We need to PM runtime suspend
and resume devices if we have ddata->needs_resume set.

Let's also improve the error handling and add few debug statements
to make it easier to notice suspend and resume related issues if
DEBUG is set.
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent e7420c2d
......@@ -662,6 +662,7 @@ static int __maybe_unused sysc_runtime_resume(struct device *dev)
static int sysc_suspend(struct device *dev)
{
struct sysc *ddata;
int error;
ddata = dev_get_drvdata(dev);
......@@ -672,14 +673,27 @@ static int sysc_suspend(struct device *dev)
if (!ddata->enabled)
return 0;
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
error = pm_runtime_put_sync_suspend(dev);
if (error < 0) {
dev_warn(ddata->dev, "%s not idle %i %s\n",
__func__, error,
ddata->name ? ddata->name : "");
return 0;
}
ddata->needs_resume = true;
return sysc_runtime_suspend(dev);
return 0;
}
static int sysc_resume(struct device *dev)
{
struct sysc *ddata;
int error;
ddata = dev_get_drvdata(dev);
......@@ -691,9 +705,16 @@ static int sysc_resume(struct device *dev)
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
ddata->needs_resume = false;
error = pm_runtime_get_sync(dev);
if (error < 0) {
dev_err(ddata->dev, "%s error %i %s\n",
__func__, error,
ddata->name ? ddata->name : "");
return sysc_runtime_resume(dev);
return error;
}
ddata->needs_resume = false;
}
return 0;
......@@ -735,6 +756,9 @@ static int sysc_noirq_resume(struct device *dev)
return 0;
if (ddata->needs_resume) {
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
ddata->needs_resume = false;
return sysc_runtime_resume(dev);
......@@ -1069,18 +1093,33 @@ static int sysc_child_suspend_noirq(struct device *dev)
ddata = sysc_child_to_parent(dev);
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
error = pm_generic_suspend_noirq(dev);
if (error)
if (error) {
dev_err(dev, "%s error at %i: %i\n",
__func__, __LINE__, error);
return error;
}
if (!pm_runtime_status_suspended(dev)) {
error = pm_generic_runtime_suspend(dev);
if (error)
if (error) {
dev_err(dev, "%s error at %i: %i\n",
__func__, __LINE__, error);
return error;
}
error = sysc_runtime_suspend(ddata->dev);
if (error)
if (error) {
dev_err(dev, "%s error at %i: %i\n",
__func__, __LINE__, error);
return error;
}
ddata->child_needs_resume = true;
}
......@@ -1095,6 +1134,9 @@ static int sysc_child_resume_noirq(struct device *dev)
ddata = sysc_child_to_parent(dev);
dev_dbg(ddata->dev, "%s %s\n", __func__,
ddata->name ? ddata->name : "");
if (ddata->child_needs_resume) {
ddata->child_needs_resume = false;
......
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