diff mbox

[v5,09/11] amba: Add support for attach/detach of PM domains

Message ID 1411151264-16245-10-git-send-email-ulf.hansson@linaro.org
State Accepted
Commit 207f1a2d294e3781b56d1acecd48aaa3b4b7b2ad
Headers show

Commit Message

Ulf Hansson Sept. 19, 2014, 6:27 p.m. UTC 
AMBA devices may on some SoCs resides in PM domains. To be able to
manage these devices from there, let's try to attach devices to their
corresponding PM domain during the probe phase.

To reverse these actions at the remove phase, we try to detach the
device from its PM domain.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Kevin Hilman <khilman@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;
 }