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regulator: core: Decouple regulators on regulator_unregister() 

Regulators shall be uncoupled if one of the couples disappear.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Dmitry Osipenko 2018-10-05 18:36:36 +03:00 committed by Mark Brown
parent 85254bcf39
commit 6303f3e78b
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GPG Key ID: 24D68B725D5487D0
1 changed files with 38 additions and 0 deletions
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38
drivers/regulator/core.c
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@ -4518,6 +4518,43 @@ static void regulator_resolve_coupling(struct regulator_dev *rdev)
}
}
static void regulator_remove_coupling(struct regulator_dev *rdev)
{
struct coupling_desc *__c_desc, *c_desc = &rdev->coupling_desc;
struct regulator_dev *__c_rdev, *c_rdev;
unsigned int __n_coupled, n_coupled;
int i, k;
n_coupled = c_desc->n_coupled;
for (i = 1; i < n_coupled; i++) {
c_rdev = c_desc->coupled_rdevs[i];
if (!c_rdev)
continue;
regulator_lock(c_rdev);
__c_desc = &c_rdev->coupling_desc;
__n_coupled = __c_desc->n_coupled;
for (k = 1; k < __n_coupled; k++) {
__c_rdev = __c_desc->coupled_rdevs[k];
if (__c_rdev == rdev) {
__c_desc->coupled_rdevs[k] = NULL;
__c_desc->n_resolved--;
break;
}
}
regulator_unlock(c_rdev);
c_desc->coupled_rdevs[i] = NULL;
c_desc->n_resolved--;
}
}
static int regulator_init_coupling(struct regulator_dev *rdev)
{
int n_phandles;
@ -4776,6 +4813,7 @@ void regulator_unregister(struct regulator_dev *rdev)
debugfs_remove_recursive(rdev->debugfs);
flush_work(&rdev->disable_work.work);
WARN_ON(rdev->open_count);
regulator_remove_coupling(rdev);
unset_regulator_supplies(rdev);
list_del(&rdev->list);
regulator_ena_gpio_free(rdev);