[PATCH 1/4] power: regulator: Trigger probe of regulators which are always-on or boot-on

In case a regulator DT node contains regulator-always-on or regulator-boot-on
property, make sure the regulator gets correctly configured by U-Boot on start
up. Unconditionally probe such regulator drivers. This is a preparatory patch
for introduction of .regulator_post_probe() which would trigger the regulator
configuration.

Parsing of regulator-always-on and regulator-boot-on DT property has been
moved to regulator_post_bind() as the information is required early, the
rest of the DT parsing has been kept in regulator_pre_probe() to avoid
slowing down the boot process.

Signed-off-by: Marek Vasut <[email protected]>
---
Cc: Ben Wolsieffer <[email protected]>
Cc: Caleb Connolly <[email protected]>
Cc: Chris Morgan <[email protected]>
Cc: Dragan Simic <[email protected]>
Cc: Eugen Hristev <[email protected]>
Cc: Francesco Dolcini <[email protected]>
Cc: Heinrich Schuchardt <[email protected]>
Cc: Jaehoon Chung <[email protected]>
Cc: Jagan Teki <[email protected]>
Cc: Jonas Karlman <[email protected]>
Cc: Kever Yang <[email protected]>
Cc: Kostya Porotchkin <[email protected]>
Cc: Matteo Lisi <[email protected]>
Cc: Mattijs Korpershoek <[email protected]>
Cc: Max Krummenacher <[email protected]>
Cc: Neil Armstrong <[email protected]>
Cc: Patrice Chotard <[email protected]>
Cc: Patrick Delaunay <[email protected]>
Cc: Philipp Tomsich <[email protected]>
Cc: Quentin Schulz <[email protected]>
Cc: Sam Day <[email protected]>
Cc: Simon Glass <[email protected]>
Cc: Sumit Garg <[email protected]>
Cc: Svyatoslav Ryhel <[email protected]>
Cc: Thierry Reding <[email protected]>
Cc: Tom Rini <[email protected]>
Cc: Volodymyr Babchuk <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
---
 drivers/power/regulator/regulator-uclass.c | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/drivers/power/regulator/regulator-uclass.c b/drivers/power/regulator/regulator-uclass.c
index 66fd531da04..ccc4ef33d83 100644
--- a/drivers/power/regulator/regulator-uclass.c
+++ b/drivers/power/regulator/regulator-uclass.c
@@ -433,6 +433,8 @@ static int regulator_post_bind(struct udevice *dev)
 	const char *property = "regulator-name";
 
 	uc_pdata = dev_get_uclass_plat(dev);
+	uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
+	uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
 
 	/* Regulator's mandatory constraint */
 	uc_pdata->name = dev_read_string(dev, property);
@@ -444,13 +446,21 @@ static int regulator_post_bind(struct udevice *dev)
 			return -EINVAL;
 	}
 
-	if (regulator_name_is_unique(dev, uc_pdata->name))
-		return 0;
+	if (!regulator_name_is_unique(dev, uc_pdata->name)) {
+		debug("'%s' of dev: '%s', has nonunique value: '%s\n",
+		      property, dev->name, uc_pdata->name);
+		return -EINVAL;
+	}
 
-	debug("'%s' of dev: '%s', has nonunique value: '%s\n",
-	      property, dev->name, uc_pdata->name);
+	/*
+	 * In case the regulator has regulator-always-on or
+	 * regulator-boot-on DT property, trigger probe() to
+	 * configure its default state during startup.
+	 */
+	if (uc_pdata->always_on && uc_pdata->boot_on)
+		dev_or_flags(dev, DM_FLAG_PROBE_AFTER_BIND);
 
-	return -EINVAL;
+	return 0;
 }
 
 static int regulator_pre_probe(struct udevice *dev)
@@ -473,8 +483,6 @@ static int regulator_pre_probe(struct udevice *dev)
 						-ENODATA);
 	uc_pdata->max_uA = dev_read_u32_default(dev, "regulator-max-microamp",
 						-ENODATA);
-	uc_pdata->always_on = dev_read_bool(dev, "regulator-always-on");
-	uc_pdata->boot_on = dev_read_bool(dev, "regulator-boot-on");
 	uc_pdata->ramp_delay = dev_read_u32_default(dev, "regulator-ramp-delay",
 						    0);
 	uc_pdata->force_off = dev_read_bool(dev, "regulator-force-boot-off");
-- 
2.43.0