regulator: Fixes for v5.10

An addition to MAINTAINERS plus a fix for a nasty bootstrapping problem
 which caused problems when we need to read the voltage of a regulator
 that is not yet available during initialization, we were not correctly
 distinguishing between this case and the case where a regulator is put
 into a bypass mode.
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Merge tag 'regulator-fix-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "An addition to MAINTAINERS plus a fix for a nasty bootstrapping
  problem which caused problems when we need to read the voltage of a
  regulator that is not yet available during initialization, we were not
  correctly distinguishing between this case and the case where a
  regulator is put into a bypass mode"

* tag 'regulator-fix-v5.10-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: defer probe when trying to get voltage from unresolved supply
  MAINTAINERS: Add entry for Qualcomm IPQ4019 VQMMC regulator

MAINTAINERS

@@ -14527,6 +14527,14 @@ F:	Documentation/devicetree/bindings/mailbox/qcom-ipcc.yaml
 F:	drivers/mailbox/qcom-ipcc.c
 F:	include/dt-bindings/mailbox/qcom-ipcc.h
 
+QUALCOMM IPQ4019 VQMMC REGULATOR DRIVER
+M:	Robert Marko <robert.marko@sartura.hr>
+M:	Luka Perkov <luka.perkov@sartura.hr>
+L:	linux-arm-msm@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/regulator/vqmmc-ipq4019-regulator.yaml
+F:	drivers/regulator/vqmmc-ipq4019-regulator.c
+
 QUALCOMM RMNET DRIVER
 M:	Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
 M:	Sean Tranchetti <stranche@codeaurora.org>

drivers/regulator/core.c

@@ -4165,6 +4165,8 @@ int regulator_get_voltage_rdev(struct regulator_dev *rdev)
 		ret = rdev->desc->fixed_uV;
 	} else if (rdev->supply) {
 		ret = regulator_get_voltage_rdev(rdev->supply->rdev);
+	} else if (rdev->supply_name) {
+		return -EPROBE_DEFER;
 	} else {
 		return -EINVAL;
 	}