pm_domains: Enable explicitly when we have power-domain providers

Many SoCs provide power-domains in their device trees. In barebox
we most of the time do not have drivers for the power-domains. This
is no problem for most of the time as the necessary power domains
are either default on or enabled during early SoC init.
With multi-arch support it can happen that we compile in SoCs for
which we do not have power-domain drivers and other SoCs where we
need a power-domain driver. The example I stumbled upon is the
i.MX7 on the one hand which has a driver and OMAP on the other hand
which has power-domains described in the device tree for which
we do not have (and do not currently need) a driver.

To be able to handle both situations let's enable pm_domain support
explicitly on SoCs we know we have a driver for.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/pm_domain.h b/include/pm_domain.h
index fac7f99227..d297053531 100644
--- a/include/pm_domain.h
+++ b/include/pm_domain.h
@@ -23,6 +23,8 @@ typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
 
 #ifdef CONFIG_PM_GENERIC_DOMAINS
 
+void genpd_activate(void);
+
 int genpd_dev_pm_attach(struct device *dev);
 
 /**
@@ -58,6 +60,10 @@ void pm_genpd_print(void);
 
 #else
 
+static inline void genpd_activate(void)
+{
+}
+
 static inline int pm_genpd_init(struct generic_pm_domain *genpd,
 				void *gov, bool is_off)
 {