From d295f7670127eb241d81e96e003b380c77c2b254 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Fri, 9 Aug 2013 15:29:27 +0800 Subject: regulator: core: Move list_voltage_{linear,linear_range,table} to helpers.c Move regulator_list_voltage_{linear,linear_range,table} helper functions to helpers.c. Signed-off-by: Axel Lin Signed-off-by: Mark Brown --- drivers/regulator/helpers.c | 86 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) (limited to 'drivers/regulator/helpers.c') diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c index d13cf8f7fb90..6e30df14714b 100644 --- a/drivers/regulator/helpers.c +++ b/drivers/regulator/helpers.c @@ -319,6 +319,92 @@ int regulator_map_voltage_linear_range(struct regulator_dev *rdev, } EXPORT_SYMBOL_GPL(regulator_map_voltage_linear_range); +/** + * regulator_list_voltage_linear - List voltages with simple calculation + * + * @rdev: Regulator device + * @selector: Selector to convert into a voltage + * + * Regulators with a simple linear mapping between voltages and + * selectors can set min_uV and uV_step in the regulator descriptor + * and then use this function as their list_voltage() operation, + */ +int regulator_list_voltage_linear(struct regulator_dev *rdev, + unsigned int selector) +{ + if (selector >= rdev->desc->n_voltages) + return -EINVAL; + if (selector < rdev->desc->linear_min_sel) + return 0; + + selector -= rdev->desc->linear_min_sel; + + return rdev->desc->min_uV + (rdev->desc->uV_step * selector); +} +EXPORT_SYMBOL_GPL(regulator_list_voltage_linear); + +/** + * regulator_list_voltage_linear_range - List voltages for linear ranges + * + * @rdev: Regulator device + * @selector: Selector to convert into a voltage + * + * Regulators with a series of simple linear mappings between voltages + * and selectors can set linear_ranges in the regulator descriptor and + * then use this function as their list_voltage() operation, + */ +int regulator_list_voltage_linear_range(struct regulator_dev *rdev, + unsigned int selector) +{ + const struct regulator_linear_range *range; + int i; + + if (!rdev->desc->n_linear_ranges) { + BUG_ON(!rdev->desc->n_linear_ranges); + return -EINVAL; + } + + for (i = 0; i < rdev->desc->n_linear_ranges; i++) { + range = &rdev->desc->linear_ranges[i]; + + if (!(selector >= range->min_sel && + selector <= range->max_sel)) + continue; + + selector -= range->min_sel; + + return range->min_uV + (range->uV_step * selector); + } + + return -EINVAL; +} +EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range); + +/** + * regulator_list_voltage_table - List voltages with table based mapping + * + * @rdev: Regulator device + * @selector: Selector to convert into a voltage + * + * Regulators with table based mapping between voltages and + * selectors can set volt_table in the regulator descriptor + * and then use this function as their list_voltage() operation. + */ +int regulator_list_voltage_table(struct regulator_dev *rdev, + unsigned int selector) +{ + if (!rdev->desc->volt_table) { + BUG_ON(!rdev->desc->volt_table); + return -EINVAL; + } + + if (selector >= rdev->desc->n_voltages) + return -EINVAL; + + return rdev->desc->volt_table[selector]; +} +EXPORT_SYMBOL_GPL(regulator_list_voltage_table); + /** * regulator_set_bypass_regmap - Default set_bypass() using regmap * -- cgit v1.2.3