[PATCH v2 3/5] pmdomain: warn if deep probe enabled and driver missing

[Ahmad Fatoum <a.fatoum@barebox.org>]

We shall require any deep probe platforms to have a power domain driver,
even if just a dummy. Otherwise a warning will be printed.

Signed-off-by: Ahmad Fatoum <a.fatoum@barebox.org>
---
v1 -> v2:
  - no change
---
 drivers/base/power.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/base/power.c b/drivers/base/power.c
index 0cdece210d94..c291f8657cbb 100644
--- a/drivers/base/power.c
+++ b/drivers/base/power.c
@@ -385,8 +385,18 @@ static int __genpd_dev_pm_attach(struct device *dev,
 		if (ret == -ENOENT)
 			ret = -EPROBE_DEFER;
 
-		if (!have_genpd_providers && ret == -EPROBE_DEFER)
-			return 0;
+		if (ret == -EPROBE_DEFER) {
+			/*
+			 * New platforms should have power domain drivers, even if
+			 * they don't do anything.
+			 */
+			if (deep_probe_is_supported()) {
+				dev_warn(dev, "power domain not found (ignoring)\n");
+				return 0;
+			}
+			if (!have_genpd_providers)
+				return 0;
+		}
 
 		/*
 		 * Assume that missing genpds are unresolved
-- 
2.47.3