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[8/9] amba: Add support for attach/detach of power domains

Message ID 1409054837-5667-9-git-send-email-ulf.hansson@linaro.org (mailing list archive)
State Not Applicable, archived
Headers show

Commit Message

Ulf Hansson Aug. 26, 2014, 12:07 p.m. UTC 
AMBA devices may on some SoCs resides in power domains. To be able to
manage these devices from there, let's try to attach devices to their
corresponding power domain during the probe phase.

To reverse these actions at the remove phase, we try to detach the
device from it's power domain.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---
 drivers/amba/bus.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/amba/bus.c b/drivers/amba/bus.c
index 3cf61a1..8f52393 100644
--- a/drivers/amba/bus.c
+++ b/drivers/amba/bus.c
@@ -182,9 +182,15 @@  static int amba_probe(struct device *dev)
 	int ret;
 
 	do {
+		ret = dev_pm_domain_attach(dev, true);
+		if (ret == -EPROBE_DEFER)
+			break;
+
 		ret = amba_get_enable_pclk(pcdev);
-		if (ret)
+		if (ret) {
+			dev_pm_domain_detach(dev, true);
 			break;
+		}
 
 		pm_runtime_get_noresume(dev);
 		pm_runtime_set_active(dev);
@@ -199,6 +205,7 @@  static int amba_probe(struct device *dev)
 		pm_runtime_put_noidle(dev);
 
 		amba_put_disable_pclk(pcdev);
+		dev_pm_domain_detach(dev, true);
 	} while (0);
 
 	return ret;
@@ -220,6 +227,7 @@  static int amba_remove(struct device *dev)
 	pm_runtime_put_noidle(dev);
 
 	amba_put_disable_pclk(pcdev);
+	dev_pm_domain_detach(dev, true);
 
 	return ret;
 }