From 39ac5ba51b69a77a30d2e783aed02ec73c9f6d70 Mon Sep 17 00:00:00 2001 From: Tushar Behera Date: Fri, 28 Mar 2014 10:50:21 +0530 Subject: 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: Tushar Behera Signed-off-by: Rafael J. Wysocki --- drivers/base/power/domain.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'drivers/base') diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index 6f54962aae1d..ae098a261fcd 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -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) -- cgit v1.2.3