linux-kernel - Re: [PATCH 07/12] mfd: syscon: Consider platform data a regmap config name

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Message-ID: <20140211172440.GG15081@lee--X1>
Date:	Tue, 11 Feb 2014 17:24:40 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Pawel Moll <pawel.moll@....com>
Cc:	arm@...nel.org, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org, Samuel Ortiz <sameo@...ux.intel.com>
Subject: Re: [PATCH 07/12] mfd: syscon: Consider platform data a regmap
 config name

> Use the device platform data as a regmap config
> name. This is particularly useful in the regmap
> debugfs when there is more than one syscon device
> registered, to distinguish the register blocks.
> 
> Cc: Samuel Ortiz <sameo@...ux.intel.com>
> Cc: Lee Jones <lee.jones@...aro.org>
> Signed-off-by: Pawel Moll <pawel.moll@....com>
> ---
> Alternatively I could define a syscon platform data structure,
> something like this:
> 
> struct syscon_platform_data {
> 	const char *label;
> };
> 
>  drivers/mfd/syscon.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/mfd/syscon.c b/drivers/mfd/syscon.c
> index 71841f9..ea1770b 100644
> --- a/drivers/mfd/syscon.c
> +++ b/drivers/mfd/syscon.c
> @@ -143,6 +143,7 @@ static int syscon_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	syscon_regmap_config.max_register = res->end - res->start - 3;
> +	syscon_regmap_config.name = dev_get_platdata(&pdev->dev);

Perhaps the answer is waiting for me in the other set, but ...

Isn't this going to be NULL most of the time?

>  	syscon->regmap = devm_regmap_init_mmio(dev, base,
>  					&syscon_regmap_config);
>  	if (IS_ERR(syscon->regmap)) {

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