linux-kernel - Re: [PATCH] regulator: gpio-regulator: Set the smallest voltage/current in the specified range

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Date:	Thu, 22 Mar 2012 10:08:58 +0100
From:	Heiko Stübner <heiko@...ech.de>
To:	Axel Lin <axel.lin@...il.com>
Cc:	linux-kernel@...r.kernel.org, Liam Girdwood <lrg@...com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Subject: Re: [PATCH] regulator: gpio-regulator: Set the smallest voltage/current in the specified range

Am Donnerstag, 22. März 2012, 07:08:04 schrieb Axel Lin:
> Do not assume the gpio regulator states map is sorted in any order.
> This patch ensures we always set the smallest voltage/current that falls
> within the specified range.
> 
> Signed-off-by: Axel Lin <axel.lin@...il.com>

nice addition, thanks

Acked-by: Heiko Stuebner <heiko@...ech.de>

> ---
>  drivers/regulator/gpio-regulator.c |    8 ++++----
>  1 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/regulator/gpio-regulator.c
> b/drivers/regulator/gpio-regulator.c index 42e1cb1..b728b36 100644
> --- a/drivers/regulator/gpio-regulator.c
> +++ b/drivers/regulator/gpio-regulator.c
> @@ -105,15 +105,15 @@ static int gpio_regulator_set_value(struct
> regulator_dev *dev, int min, int max)
>  {
>  	struct gpio_regulator_data *data = rdev_get_drvdata(dev);
> -	int ptr, target, state;
> +	int ptr, target, state, best_val = INT_MAX;
> 
> -	target = -1;
>  	for (ptr = 0; ptr < data->nr_states; ptr++)
> -		if (data->states[ptr].value >= min &&
> +		if (data->states[ptr].value < best_val &&
> +		    data->states[ptr].value >= min &&
>  		    data->states[ptr].value <= max)
>  			target = data->states[ptr].gpios;
> 
> -	if (target < 0)
> +	if (best_val == INT_MAX)
>  		return -EINVAL;
> 
>  	for (ptr = 0; ptr < data->nr_gpios; ptr++) {

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