linux-kernel - Re: [PATCH] regulator: ab8500-ext: Don't register without initialisation data

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Message-ID: <20130524112333.GW22683@gmail.com>
Date:	Fri, 24 May 2013 12:23:33 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	broonie@...nel.org, linus.walleij@...aro.org
Cc:	arnd@...db.de, linus.walleij@...ricsson.com,
	srinidhi.kasagar@...ricsson.com
Subject: Re: [PATCH] regulator: ab8500-ext: Don't register without
 initialisation data

On Wed, 22 May 2013, Lee Jones wrote:

> This patch fixes a bug introduced in the v3.10 merge window.
> 
> Some platforms will not want external registers. Rather than setting up
> lots of different clauses in the core ab8500 regulator driver not to
> call ab8500-ext init() we just won't pass the initialisation data from
> platform code. This patch checks for it and if it's missing, we won't
> register the external regulators.
> 
> Cc: Mark Brown <broonie@...nel.org>
> Signed-off-by: Lee Jones <lee.jones@...aro.org>
> ---
>  drivers/regulator/ab8500-ext.c |    6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c
> index b4d4547..8421537 100644
> --- a/drivers/regulator/ab8500-ext.c
> +++ b/drivers/regulator/ab8500-ext.c
> @@ -334,6 +334,12 @@ int ab8500_ext_regulator_init(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> +	/* have any external regulators been specified? */
> +	if (pdata->num_ext_regulator == 0) {
> +		dev_warn(&pdev->dev, "Not using external regulators\n");
> +		return 0;
> +	}
> +
>  	/* make sure the platform data has the correct size */
>  	if (pdata->num_ext_regulator != ARRAY_SIZE(ab8500_ext_regulator_info)) {
>  		dev_err(&pdev->dev, "Configuration error: size mismatch.\n");

Okay drop this patch, I have a better solution.

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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