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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>
This commit is contained in:
Ulf Hansson 2014-09-19 20:27:42 +02:00 committed by Rafael J. Wysocki
parent 676e7c257a
commit 207f1a2d29
1 changed files with 10 additions and 2 deletions
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12
drivers/amba/bus.c
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@ -182,10 +182,16 @@ static int amba_probe(struct device *dev)
int ret;
do {
ret = amba_get_enable_pclk(pcdev);
if (ret)
ret = dev_pm_domain_attach(dev, true);
if (ret == -EPROBE_DEFER)
break;
ret = amba_get_enable_pclk(pcdev);
if (ret) {
dev_pm_domain_detach(dev, true);
break;
}
pm_runtime_get_noresume(dev);
pm_runtime_set_active(dev);
pm_runtime_enable(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;
}