diff options
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index a46be221dbdc..679ad3d2ed23 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1403,7 +1403,9 @@ static int set_machine_constraints(struct regulator_dev *rdev, rdev_err(rdev, "failed to enable\n"); return ret; } - rdev->use_count++; + + if (rdev->constraints->always_on) + rdev->use_count++; } print_constraints(rdev); @@ -1844,6 +1846,7 @@ struct regulator *_regulator_get(struct device *dev, const char *id, struct regulator_dev *rdev; struct regulator *regulator; const char *devname = dev ? dev_name(dev) : "deviceless"; + struct device_link *link; int ret; if (get_type >= MAX_GET_TYPE) { @@ -1951,7 +1954,9 @@ struct regulator *_regulator_get(struct device *dev, const char *id, rdev->use_count = 0; } - device_link_add(dev, &rdev->dev, DL_FLAG_STATELESS); + link = device_link_add(dev, &rdev->dev, DL_FLAG_STATELESS); + if (!IS_ERR_OR_NULL(link)) + regulator->device_link = true; return regulator; } @@ -2046,7 +2051,8 @@ static void _regulator_put(struct regulator *regulator) debugfs_remove_recursive(regulator->debugfs); if (regulator->dev) { - device_link_remove(regulator->dev, &rdev->dev); + if (regulator->device_link) + device_link_remove(regulator->dev, &rdev->dev); /* remove any sysfs entries */ sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name); @@ -4963,6 +4969,12 @@ static int generic_coupler_attach(struct regulator_coupler *coupler, return -EPERM; } + if (!rdev->constraints->always_on) { + rdev_err(rdev, + "Coupling of a non always-on regulator is unimplemented\n"); + return -ENOTSUPP; + } + return 0; } @@ -5198,6 +5210,7 @@ unset_supplies: regulator_remove_coupling(rdev); mutex_unlock(®ulator_list_mutex); wash: + kfree(rdev->coupling_desc.coupled_rdevs); kfree(rdev->constraints); mutex_lock(®ulator_list_mutex); regulator_ena_gpio_free(rdev); |