Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 39ac5ba5 authored by Tushar Behera's avatar Tushar Behera Committed by Rafael J. Wysocki
Browse files

PM / domains: Add pd_ignore_unused to keep power domains enabled 



Keep all power-domains already enabled by bootloader on, even if no
driver has claimed them. This is useful for debug and development, but
should not be needed on a platform with proper driver support.

Signed-off-by: default avatarTushar Behera <tushar.behera@linaro.org>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 70f6c087

Documentation/kernel-parameters.txt

+7 −0
Original line number Diff line number Diff line
@@ -2558,6 +2558,13 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 


	pcmv=		[HW,PCMCIA] BadgePAD 4



	pd_ignore_unused

			[PM]

			Keep all power-domains already enabled by bootloader on,

			even if no driver has claimed them. This is useful

			for debug and development, but should not be

			needed on a platform with proper driver support.



	pd.		[PARIDE]

			See Documentation/blockdev/paride.txt.

drivers/base/power/domain.c

+13 −0
Original line number Diff line number Diff line
@@ -705,6 +705,14 @@ static int pm_genpd_runtime_resume(struct device *dev) 
	return 0;

}



static bool pd_ignore_unused;

static int __init pd_ignore_unused_setup(char *__unused)

{

	pd_ignore_unused = true;

	return 1;

}

__setup("pd_ignore_unused", pd_ignore_unused_setup);



/**

 * pm_genpd_poweroff_unused - Power off all PM domains with no devices in use.

 */
@@ -712,6 +720,11 @@ void pm_genpd_poweroff_unused(void) 
{

	struct generic_pm_domain *genpd;



	if (pd_ignore_unused) {

		pr_warn("genpd: Not disabling unused power domains\n");

		return;

	}



	mutex_lock(&gpd_list_lock);



	list_for_each_entry(genpd, &gpd_list, gpd_list_node)