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regulator: resolve supply after creating regulator

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[ Upstream commit aea6cb9970 ]

When creating a new regulator its supply cannot create the sysfs link
because the device is not yet published. Remove early supply resolving
since it will be done later anyway. This makes the following error
disappear and the symlinks get created instead.

  DCDC_REG1: supplied by VSYS
  VSYS: could not add device link regulator.3 err -2

Note: It doesn't fix the problem for bypassed regulators, though.

Fixes: 45389c4752 ("regulator: core: Add early supply resolution for regulators")
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Link: https://lore.kernel.org/r/ba09e0a8617ffeeb25cb4affffe6f3149319cef8.1601155770.git.mirq-linux@rere.qmqm.pl
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Michał Mirosław
2020-09-26 23:32:41 +02:00
committed by Greg Kroah-Hartman
parent 0284adc407
commit 3fc99e38fd
1 changed files with 13 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
drivers/regulator/core.c
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@@ -4363,15 +4363,20 @@ regulator_register(const struct regulator_desc *regulator_desc,
else if (regulator_desc->supply_name)
rdev->supply_name = regulator_desc->supply_name;
/*
* Attempt to resolve the regulator supply, if specified,
* but don't return an error if we fail because we will try
* to resolve it again later as more regulators are added.
*/
if (regulator_resolve_supply(rdev))
rdev_dbg(rdev, "unable to resolve supply\n");
ret = set_machine_constraints(rdev, constraints);
if (ret == -EPROBE_DEFER) {
/* Regulator might be in bypass mode and so needs its supply
* to set the constraints */
/* FIXME: this currently triggers a chicken-and-egg problem
* when creating -SUPPLY symlink in sysfs to a regulator
* that is just being created */
ret = regulator_resolve_supply(rdev);
if (!ret)
ret = set_machine_constraints(rdev, constraints);
else
rdev_dbg(rdev, "unable to resolve supply early: %pe\n",
ERR_PTR(ret));
}
if (ret < 0)
goto wash;