diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/regulator/core.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index ca2efca00734..dbdebed660bf 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -912,8 +912,12 @@ static int set_machine_constraints(struct regulator_dev *rdev, int ret = 0; struct regulator_ops *ops = rdev->desc->ops; - rdev->constraints = kmemdup(constraints, sizeof(*constraints), - GFP_KERNEL); + if (constraints) + rdev->constraints = kmemdup(constraints, sizeof(*constraints), + GFP_KERNEL); + else + rdev->constraints = kzalloc(sizeof(*constraints), + GFP_KERNEL); if (!rdev->constraints) return -ENOMEM; @@ -922,7 +926,7 @@ static int set_machine_constraints(struct regulator_dev *rdev, goto out; /* do we need to setup our suspend state */ - if (constraints->initial_state) { + if (rdev->constraints->initial_state) { ret = suspend_prepare(rdev, rdev->constraints->initial_state); if (ret < 0) { rdev_err(rdev, "failed to set suspend state\n"); @@ -930,7 +934,7 @@ static int set_machine_constraints(struct regulator_dev *rdev, } } - if (constraints->initial_mode) { + if (rdev->constraints->initial_mode) { if (!ops->set_mode) { rdev_err(rdev, "no set_mode operation\n"); ret = -EINVAL; @@ -2697,6 +2701,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, struct device *dev, const struct regulator_init_data *init_data, void *driver_data, struct device_node *of_node) { + const struct regulation_constraints *constraints = NULL; static atomic_t regulator_no = ATOMIC_INIT(0); struct regulator_dev *rdev; int ret, i; @@ -2712,9 +2717,6 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, regulator_desc->type != REGULATOR_CURRENT) return ERR_PTR(-EINVAL); - if (!init_data) - return ERR_PTR(-EINVAL); - /* Only one of each should be implemented */ WARN_ON(regulator_desc->ops->get_voltage && regulator_desc->ops->get_voltage_sel); @@ -2747,7 +2749,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, INIT_DELAYED_WORK(&rdev->disable_work, regulator_disable_work); /* preform any regulator specific init */ - if (init_data->regulator_init) { + if (init_data && init_data->regulator_init) { ret = init_data->regulator_init(rdev->reg_data); if (ret < 0) goto clean; @@ -2768,7 +2770,10 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, dev_set_drvdata(&rdev->dev, rdev); /* set regulator constraints */ - ret = set_machine_constraints(rdev, &init_data->constraints); + if (init_data) + constraints = &init_data->constraints; + + ret = set_machine_constraints(rdev, constraints); if (ret < 0) goto scrub; @@ -2777,7 +2782,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, if (ret < 0) goto scrub; - if (init_data->supply_regulator) + if (init_data && init_data->supply_regulator) supply = init_data->supply_regulator; else if (regulator_desc->supply_name) supply = regulator_desc->supply_name; @@ -2799,15 +2804,17 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc, } /* add consumers devices */ - for (i = 0; i < init_data->num_consumer_supplies; i++) { - ret = set_consumer_device_supply(rdev, - init_data->consumer_supplies[i].dev, - init_data->consumer_supplies[i].dev_name, - init_data->consumer_supplies[i].supply); - if (ret < 0) { - dev_err(dev, "Failed to set supply %s\n", + if (init_data) { + for (i = 0; i < init_data->num_consumer_supplies; i++) { + ret = set_consumer_device_supply(rdev, + init_data->consumer_supplies[i].dev, + init_data->consumer_supplies[i].dev_name, init_data->consumer_supplies[i].supply); - goto unset_supplies; + if (ret < 0) { + dev_err(dev, "Failed to set supply %s\n", + init_data->consumer_supplies[i].supply); + goto unset_supplies; + } } } |
