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Commit 207f1a2d authored by Ulf Hansson's avatar Ulf Hansson Committed by Rafael J. Wysocki
Browse files

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: default avatarUlf Hansson <ulf.hansson@linaro.org>
Reviewed-by: default avatarKevin Hilman <khilman@linaro.org>
Reviewed-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 676e7c25

drivers/amba/bus.c

+9 −1
Original line number Original line Diff line number Diff line
@@ -182,9 +182,15 @@ static int amba_probe(struct device *dev) 
	int ret;

	int ret;





	do {

	do {

		ret = dev_pm_domain_attach(dev, true);

		if (ret == -EPROBE_DEFER)

			break;



		ret = amba_get_enable_pclk(pcdev);

		ret = amba_get_enable_pclk(pcdev);

		if (ret)

		if (ret) {

			dev_pm_domain_detach(dev, true);

			break;

			break;

		}





		pm_runtime_get_noresume(dev);

		pm_runtime_get_noresume(dev);

		pm_runtime_set_active(dev);

		pm_runtime_set_active(dev);
@@ -199,6 +205,7 @@ static int amba_probe(struct device *dev) 
		pm_runtime_put_noidle(dev);

		pm_runtime_put_noidle(dev);





		amba_put_disable_pclk(pcdev);

		amba_put_disable_pclk(pcdev);

		dev_pm_domain_detach(dev, true);

	} while (0);

	} while (0);





	return ret;

	return ret;
@@ -220,6 +227,7 @@ static int amba_remove(struct device *dev) 
	pm_runtime_put_noidle(dev);

	pm_runtime_put_noidle(dev);





	amba_put_disable_pclk(pcdev);

	amba_put_disable_pclk(pcdev);

	dev_pm_domain_detach(dev, true);





	return ret;

	return ret;

}

}