linux-kernel - Re: [PATCH] ti_tscadc: Match mfd sub devices to regmap interface

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Date:	Tue, 30 Oct 2012 19:21:37 +0100
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Pantelis Antoniou <panto@...oniou-consulting.com>
CC:	Jonathan Cameron <jic23@....ac.uk>,
	"Patil, Rachna" <rachna@...com>, linux-iio@...r.kernel.org,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Koen Kooi <koen@...inion.thruhere.net>,
	Matt Porter <mporter@...com>, Russ Dill <Russ.Dill@...com>,
	linux-omap@...r.kernel.org
Subject: Re: [PATCH] ti_tscadc: Match mfd sub devices to regmap interface

On 10/31/2012 04:55 PM, Pantelis Antoniou wrote:
> The MFD parent device now uses a regmap, instead of direct
> memory access. Use the same method in the sub devices to avoid
> nasty surprises.
> 
> Also rework the channel initialization of tiadc a bit.

Those two bits are not even closely related, they should really go into
separate patches.

> 
> Signed-off-by: Pantelis Antoniou <panto@...oniou-consulting.com>
> ---
>  drivers/iio/adc/ti_am335x_adc.c           | 27 +++++++++++++++++++--------
>  drivers/input/touchscreen/ti_am335x_tsc.c | 16 +++++++++++++---
>  drivers/mfd/ti_am335x_tscadc.c            |  7 +++++--
>  3 files changed, 37 insertions(+), 13 deletions(-)
> 
[...]
>  
> @@ -213,6 +222,8 @@ static int __devinit tiadc_probe(struct platform_device *pdev)
>  
>  	platform_set_drvdata(pdev, indio_dev);
>  
> +	dev_info(&pdev->dev, "Initialized\n");

That's just noise, please don't add it. Imagine every driver did this you'd
end up with a lot of noise your debug log.

> +
>  	return 0;
>  
>  err_free_channels:
> diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c
> index 7a26810..d09e1a7 100644
> --- a/drivers/input/touchscreen/ti_am335x_tsc.c
> +++ b/drivers/input/touchscreen/ti_am335x_tsc.c
> @@ -26,6 +26,7 @@
[...]
>  /*
> @@ -455,10 +460,15 @@ static int __devinit titsc_probe(struct platform_device *pdev)
>  
>  	/* register to the input system */
>  	err = input_register_device(input_dev);
> -	if (err)
> +	if (err) {
> +		dev_err(&pdev->dev, "Failed to register input device\n");
>  		goto err_free_irq;
> +	}
>  
>  	platform_set_drvdata(pdev, ts_dev);
> +
> +	dev_info(&pdev->dev, "Initialized OK\n");

Same here


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