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authorUlf Hansson <ulf.hansson@linaro.org>2014-09-19 20:27:42 +0200
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-09-22 15:57:40 +0200
commit207f1a2d294e3781b56d1acecd48aaa3b4b7b2ad (patch)
treee056e2f1e8638fadd81c7b0cca87a7348a3026b3
parent676e7c257a339b44b8a613be145b22b85cf2ffc4 (diff)
downloadop-kernel-dev-207f1a2d294e3781b56d1acecd48aaa3b4b7b2ad.zip
op-kernel-dev-207f1a2d294e3781b56d1acecd48aaa3b4b7b2ad.tar.gz
amba: Add support for attach/detach of PM domains
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> Reviewed-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/amba/bus.c10
1 files changed, 9 insertions, 1 deletions
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;
}
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