From: Mark Brown <broonie@xxxxxxxxxx> This patch has been added to the 3.18 stable tree. If you have any objections, please let us know. =============== [ Upstream commit 609ca5f3cb32c2d11fd8cabe293ff3689e7d2613 ] The regulator_list has exactly the same contents as the list that the driver core maintains of regulator_class members so is redundant. As a first step in converting over to use the class device list convert our iteration in late_initcall() to use the class device iterator. Signed-off-by: Mark Brown <broonie@xxxxxxxxxx> Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx> --- drivers/regulator/core.c | 106 ++++++++++++++++++++++++----------------------- 1 file changed, 55 insertions(+), 51 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index bc3d80f..872e53f 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -110,6 +110,11 @@ static struct regulator *create_regulator(struct regulator_dev *rdev, struct device *dev, const char *supply_name); +static struct regulator_dev *dev_to_rdev(struct device *dev) +{ + return container_of(dev, struct regulator_dev, dev); +} + static const char *rdev_get_name(struct regulator_dev *rdev) { if (rdev->constraints && rdev->constraints->name) @@ -3994,13 +3999,57 @@ static int __init regulator_init(void) /* init early to allow our consumers to complete system booting */ core_initcall(regulator_init); -static int __init regulator_init_complete(void) +static int __init regulator_late_cleanup(struct device *dev, void *data) { - struct regulator_dev *rdev; - const struct regulator_ops *ops; - struct regulation_constraints *c; + struct regulator_dev *rdev = dev_to_rdev(dev); + const struct regulator_ops *ops = rdev->desc->ops; + struct regulation_constraints *c = rdev->constraints; int enabled, ret; + if (c && c->always_on) + return 0; + + if (c && !(c->valid_ops_mask & REGULATOR_CHANGE_STATUS)) + return 0; + + mutex_lock(&rdev->mutex); + + if (rdev->use_count) + goto unlock; + + /* If we can't read the status assume it's on. */ + if (ops->is_enabled) + enabled = ops->is_enabled(rdev); + else + enabled = 1; + + if (!enabled) + goto unlock; + + if (have_full_constraints()) { + /* We log since this may kill the system if it goes + * wrong. */ + rdev_info(rdev, "disabling\n"); + ret = _regulator_do_disable(rdev); + if (ret != 0) + rdev_err(rdev, "couldn't disable: %d\n", ret); + } else { + /* The intention is that in future we will + * assume that full constraints are provided + * so warn even if we aren't going to do + * anything here. + */ + rdev_warn(rdev, "incomplete constraints, leaving on\n"); + } + +unlock: + mutex_unlock(&rdev->mutex); + + return 0; +} + +static int __init regulator_init_complete(void) +{ /* * Since DT doesn't provide an idiomatic mechanism for * enabling full constraints and since it's much more natural @@ -4010,58 +4059,13 @@ static int __init regulator_init_complete(void) if (of_have_populated_dt()) has_full_constraints = true; - mutex_lock(®ulator_list_mutex); - /* If we have a full configuration then disable any regulators * we have permission to change the status for and which are * not in use or always_on. This is effectively the default * for DT and ACPI as they have full constraints. */ - list_for_each_entry(rdev, ®ulator_list, list) { - ops = rdev->desc->ops; - c = rdev->constraints; - - if (c && c->always_on) - continue; - - if (c && !(c->valid_ops_mask & REGULATOR_CHANGE_STATUS)) - continue; - - mutex_lock(&rdev->mutex); - - if (rdev->use_count) - goto unlock; - - /* If we can't read the status assume it's on. */ - if (ops->is_enabled) - enabled = ops->is_enabled(rdev); - else - enabled = 1; - - if (!enabled) - goto unlock; - - if (have_full_constraints()) { - /* We log since this may kill the system if it - * goes wrong. */ - rdev_info(rdev, "disabling\n"); - ret = _regulator_do_disable(rdev); - if (ret != 0) - rdev_err(rdev, "couldn't disable: %d\n", ret); - } else { - /* The intention is that in future we will - * assume that full constraints are provided - * so warn even if we aren't going to do - * anything here. - */ - rdev_warn(rdev, "incomplete constraints, leaving on\n"); - } - -unlock: - mutex_unlock(&rdev->mutex); - } - - mutex_unlock(®ulator_list_mutex); + class_for_each_device(®ulator_class, NULL, NULL, + regulator_late_cleanup); return 0; } -- 2.5.0 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html