diff options
Diffstat (limited to 'drivers/regulator/helpers.c')
| -rw-r--r-- | drivers/regulator/helpers.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c index ad2237a95572..e6c999ba3fa2 100644 --- a/drivers/regulator/helpers.c +++ b/drivers/regulator/helpers.c @@ -902,8 +902,21 @@ bool regulator_is_equal(struct regulator *reg1, struct regulator *reg2) } EXPORT_SYMBOL_GPL(regulator_is_equal); -static int find_closest_bigger(unsigned int target, const unsigned int *table, - unsigned int num_sel, unsigned int *sel) +/** + * regulator_find_closest_bigger - helper to find offset in ramp delay table + * + * @target: targeted ramp_delay + * @table: table with supported ramp delays + * @num_sel: number of entries in the table + * @sel: Pointer to store table offset + * + * This is the internal helper used by regulator_set_ramp_delay_regmap to + * map ramp delay to register value. It should only be used directly if + * regulator_set_ramp_delay_regmap cannot handle a specific device setup + * (e.g. because the value is split over multiple registers). + */ +int regulator_find_closest_bigger(unsigned int target, const unsigned int *table, + unsigned int num_sel, unsigned int *sel) { unsigned int s, tmp, max, maxsel = 0; bool found = false; @@ -933,11 +946,13 @@ static int find_closest_bigger(unsigned int target, const unsigned int *table, return 0; } +EXPORT_SYMBOL_GPL(regulator_find_closest_bigger); /** * regulator_set_ramp_delay_regmap - set_ramp_delay() helper * * @rdev: regulator to operate on + * @ramp_delay: ramp-rate value given in units V/S (uV/uS) * * Regulators that use regmap for their register I/O can set the ramp_reg * and ramp_mask fields in their descriptor and then use this as their @@ -951,8 +966,8 @@ int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay) if (WARN_ON(!rdev->desc->n_ramp_values || !rdev->desc->ramp_delay_table)) return -EINVAL; - ret = find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table, - rdev->desc->n_ramp_values, &sel); + ret = regulator_find_closest_bigger(ramp_delay, rdev->desc->ramp_delay_table, + rdev->desc->n_ramp_values, &sel); if (ret) { dev_warn(rdev_get_dev(rdev), |