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Date: Sun, 20 May 2012 10:30:21 +0800 From: Axel Lin <axel.lin@...il.com> To: linux-kernel@...r.kernel.org Cc: Lee Jones <lee.jones@...aro.org>, Linus Walleij <linus.walleij@...ricsson.com>, Mark Brown <broonie@...nsource.wolfsonmicro.com>, Liam Girdwood <lrg@...com>, Anuj Aggarwal <anuj.aggarwal@...com>, Marek Szyprowski <m.szyprowski@...sung.com> Subject: [PATCH RFC/RFT 1/7] 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 <axel.lin@...il.com> --- drivers/regulator/core.c | 25 +++++++++++++++++++++++++ include/linux/regulator/driver.h | 5 +++++ 2 files changed, 30 insertions(+), 0 deletions(-) diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index faa0532..0b15587 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1880,6 +1880,31 @@ 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 * @selector: identify voltage to list diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h index b0432cc..8022638 100644 --- a/include/linux/regulator/driver.h +++ b/include/linux/regulator/driver.h @@ -170,6 +170,7 @@ enum regulator_type { * * @min_uV: Voltage given by the lowest selector (if linear mapping) * @uV_step: Voltage increase with each selector (if linear mapping) + * @volt_table: Voltage mapping table (if table based mapping) * * @vsel_reg: Register for selector when using regulator_regmap_X_voltage_ * @vsel_mask: Mask for register bitfield used for selector @@ -189,6 +190,8 @@ struct regulator_desc { unsigned int min_uV; unsigned int uV_step; + const unsigned int *volt_table; + unsigned int vsel_reg; unsigned int vsel_mask; unsigned int enable_reg; @@ -271,6 +274,8 @@ int regulator_mode_to_status(unsigned int); int regulator_list_voltage_linear(struct regulator_dev *rdev, unsigned int selector); +int regulator_list_voltage_table(struct regulator_dev *rdev, + unsigned int selector); int regulator_map_voltage_linear(struct regulator_dev *rdev, int min_uV, int max_uV); int regulator_map_voltage_iterate(struct regulator_dev *rdev, -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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