From cffc9592fde309deafce12362e0a285108cfa3c8 Mon Sep 17 00:00:00 2001 From: Axel Lin Date: Sun, 20 May 2012 10:30:21 +0800 Subject: regulator: core: Allow drivers to set voltage mapping table in regulator_desc Some regulator hardware use table based mapping can set volt_table in regulator_desc and use regulator_list_voltage_table() for their list_voltage callback. Signed-off-by: Axel Lin Acked-by: Liam Girdwood Signed-off-by: Mark Brown --- drivers/regulator/core.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers/regulator') diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index 7584a74eec8a..333b7ebe7cae 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1882,6 +1882,31 @@ int regulator_list_voltage_linear(struct regulator_dev *rdev, } EXPORT_SYMBOL_GPL(regulator_list_voltage_linear); +/** + * 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_list_voltage - enumerate supported voltages * @regulator: regulator source -- cgit v1.2.3