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[4/7] PM / mfd: intel-lpss: Use DPM_FLAG_SMART_SUSPEND

Message ID 3548517.xcdEzff6pU@aspire.rjw.lan (mailing list archive)
State New, archived
Delegated to: Bjorn Helgaas
Headers show

Commit Message

Rafael J. Wysocki Jan. 3, 2018, 12:34 a.m. UTC 
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Make the intel-lpss driver set DPM_FLAG_SMART_SUSPEND for its
devices which will allow them to stay in runtime suspend during
system suspend unless they need to be reconfigured for some reason.

Also make it avoid resuming its child devices if they have
DPM_FLAG_SMART_SUSPEND set to allow them to remain in runtime
suspend during system suspend.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-for-MFD-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/mfd/intel-lpss.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox

Patch

Index: linux-pm/drivers/mfd/intel-lpss.c
===================================================================
--- linux-pm.orig/drivers/mfd/intel-lpss.c
+++ linux-pm/drivers/mfd/intel-lpss.c
@@ -450,6 +450,8 @@  int intel_lpss_probe(struct device *dev,
 	if (ret)
 		goto err_remove_ltr;
 
+	dev_pm_set_driver_flags(dev, DPM_FLAG_SMART_SUSPEND);
+
 	return 0;
 
 err_remove_ltr:
@@ -478,7 +480,9 @@  EXPORT_SYMBOL_GPL(intel_lpss_remove);
 
 static int resume_lpss_device(struct device *dev, void *data)
 {
-	pm_runtime_resume(dev);
+	if (!dev_pm_test_driver_flags(dev, DPM_FLAG_SMART_SUSPEND))
+		pm_runtime_resume(dev);
+
 	return 0;
 }