linux-kernel - Re: [PATCHv7 10/11] regulator: expose regulator_find_closest

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Date:   Thu, 16 Mar 2023 02:34:53 +0100
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Mark Brown <broonie@...nel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-kernel@...r.kernel.org
Cc:     Lee Jones <lee@...nel.org>
Subject: Re: [PATCHv7 10/11] regulator: expose regulator_find_closest_bigger

Hi Mark and Liam,

On Tue, Mar 07, 2023 at 04:36:16PM +0100, Sebastian Reichel wrote:
> Expose and document the table lookup logic used by
> regulator_set_ramp_delay_regmap, so that it can be
> reused for devices that cannot be configured via
> regulator_set_ramp_delay_regmap.
> 
> Signed-off-by: Sebastian Reichel <sebastian.reichel@...labora.com>
> ---

Can you please Ack and the following patch?
(they needs to go through MFD tree)

Thanks,

-- Sebastian

>  drivers/regulator/helpers.c      | 22 ++++++++++++++++++----
>  include/linux/regulator/driver.h |  2 ++
>  2 files changed, 20 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/regulator/helpers.c b/drivers/regulator/helpers.c
> index ad2237a95572..586f42e378ee 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;
> @@ -933,6 +946,7 @@ 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
> @@ -951,8 +965,8 @@ 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),
> diff --git a/include/linux/regulator/driver.h b/include/linux/regulator/driver.h
> index d3b4a3d4514a..c6ef7d68eb9a 100644
> --- a/include/linux/regulator/driver.h
> +++ b/include/linux/regulator/driver.h
> @@ -758,6 +758,8 @@ int regulator_set_current_limit_regmap(struct regulator_dev *rdev,
>  				       int min_uA, int max_uA);
>  int regulator_get_current_limit_regmap(struct regulator_dev *rdev);
>  void *regulator_get_init_drvdata(struct regulator_init_data *reg_init_data);
> +int regulator_find_closest_bigger(unsigned int target, const unsigned int *table,
> +				  unsigned int num_sel, unsigned int *sel);
>  int regulator_set_ramp_delay_regmap(struct regulator_dev *rdev, int ramp_delay);
>  int regulator_sync_voltage_rdev(struct regulator_dev *rdev);
>  
> -- 
> 2.39.2
> 
> 
> -- 
> To unsubscribe, send mail to kernel-unsubscribe@...ts.collabora.co.uk.

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