pmdomain: core: Default to use of_genpd_sync_state() for genpd providers

Unless the typical platform driver that act as genpd provider, has its own
->sync_state() callback implemented let's default to use
of_genpd_sync_state().

More precisely, while adding a genpd OF provider let's assign the
->sync_state() callback, in case the fwnode has a device and its driver
doesn't have the ->sync_state() set already. In this way the typical
platform driver doesn't need to assign ->sync_state(), unless it has some
additional things to manage beyond genpds.

Suggested-by: Saravana Kannan <saravanak@google.com>
Tested-by: Hiago De Franco <hiago.franco@toradex.com> # Colibri iMX8X
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> # TI AM62A,Xilinx ZynqMP ZCU106
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Link: https://lore.kernel.org/r/20250701114733.636510-21-ulf.hansson@linaro.org

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index ca47f91b9e91f59d78b280c8c4c31d5ccac6cca9..5cef6de60c72a18526dc7ecd5c455b7a0482409a 100644 (file)
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -2600,6 +2600,11 @@ static bool genpd_present(const struct generic_pm_domain *genpd)
        return ret;
 }
 
+static void genpd_sync_state(struct device *dev)
+{
+       return of_genpd_sync_state(dev->of_node);
+}
+
 /**
  * of_genpd_add_provider_simple() - Register a simple PM domain provider
  * @np: Device node pointer associated with the PM domain provider.
@@ -2628,6 +2633,8 @@ int of_genpd_add_provider_simple(struct device_node *np,
        if (!dev && !genpd_is_no_sync_state(genpd)) {
                genpd->sync_state = GENPD_SYNC_STATE_SIMPLE;
                device_set_node(&genpd->dev, fwnode);
+       } else {
+               dev_set_drv_sync_state(dev, genpd_sync_state);
        }
 
        put_device(dev);
@@ -2700,6 +2707,8 @@ int of_genpd_add_provider_onecell(struct device_node *np,
        dev = get_dev_from_fwnode(fwnode);
        if (!dev)
                sync_state = true;
+       else
+               dev_set_drv_sync_state(dev, genpd_sync_state);
 
        put_device(dev);