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SubjectRe: [PATCH v3 2/3] regulator: add regulator_desc_list_voltage_linear_range
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On 2019-02-14 01:38, Matti Vaittinen wrote:
> Add regulator_desc_list_voltage_linear_range which can be used
> by drivers for getting the voltages before regulator is registered.
> This may be useful for drivers which need to fetch the voltage
> selectors at device-tree parsing callback.
>
> Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
> Acked-by: Mark Brown <broonie@kernel.org>

Tested-by: Angus Ainslie <angus@akkea.ca>
Reviewed-by: Angus Ainslie <angus@akkea.ca>

> ---
>
> Mark, I converted your:
> "This seems fine." from RFC patch v1 into acked-by. This should
> be unchanged. Please let me know if that's not Ok.
>
> drivers/regulator/helpers.c | 39
> +++++++++++++++++++++++++++++----------
> include/linux/regulator/driver.h | 6 ++++++
> 2 files changed, 35 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
> index 5686a1335bd3..68ac6017ef28 100644
> --- a/drivers/regulator/helpers.c
> +++ b/drivers/regulator/helpers.c
> @@ -594,28 +594,30 @@ int
> regulator_list_voltage_pickable_linear_range(struct regulator_dev
> *rdev,
> EXPORT_SYMBOL_GPL(regulator_list_voltage_pickable_linear_range);
>
> /**
> - * regulator_list_voltage_linear_range - List voltages for linear
> ranges
> + * regulator_desc_list_voltage_linear_range - List voltages for linear
> ranges
> *
> - * @rdev: Regulator device
> + * @desc: Regulator desc for regulator which volatges are to be listed
> * @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,
> + * and selectors who have set linear_ranges in the regulator
> descriptor
> + * can use this function prior regulator registration to list
> voltages.
> + * This is useful when voltages need to be listed during device-tree
> + * parsing.
> */
> -int regulator_list_voltage_linear_range(struct regulator_dev *rdev,
> - unsigned int selector)
> +int regulator_desc_list_voltage_linear_range(const struct
> regulator_desc *desc,
> + unsigned int selector)
> {
> const struct regulator_linear_range *range;
> int i;
>
> - if (!rdev->desc->n_linear_ranges) {
> - BUG_ON(!rdev->desc->n_linear_ranges);
> + if (!desc->n_linear_ranges) {
> + BUG_ON(!desc->n_linear_ranges);
> return -EINVAL;
> }
>
> - for (i = 0; i < rdev->desc->n_linear_ranges; i++) {
> - range = &rdev->desc->linear_ranges[i];
> + for (i = 0; i < desc->n_linear_ranges; i++) {
> + range = &desc->linear_ranges[i];
>
> if (!(selector >= range->min_sel &&
> selector <= range->max_sel))
> @@ -628,6 +630,23 @@ int regulator_list_voltage_linear_range(struct
> regulator_dev *rdev,
>
> return -EINVAL;
> }
> +EXPORT_SYMBOL_GPL(regulator_desc_list_voltage_linear_range);
> +
> +/**
> + * 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)
> +{
> + return regulator_desc_list_voltage_linear_range(rdev->desc,
> selector);
> +}
> EXPORT_SYMBOL_GPL(regulator_list_voltage_linear_range);
>
> /**
> diff --git a/include/linux/regulator/driver.h
> b/include/linux/regulator/driver.h
> index 7f8345bff4e1..05efe2b057c1 100644
> --- a/include/linux/regulator/driver.h
> +++ b/include/linux/regulator/driver.h
> @@ -539,4 +539,10 @@ void *regulator_get_init_drvdata(struct
> regulator_init_data *reg_init_data);
> void regulator_lock(struct regulator_dev *rdev);
> void regulator_unlock(struct regulator_dev *rdev);
>
> +/*
> + * Helper functions intended to be used by regulator drivers prior
> registering
> + * their regulators.
> + */
> +int regulator_desc_list_voltage_linear_range(const struct
> regulator_desc *desc,
> + unsigned int selector);
> #endif
> --
> 2.14.3

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