linux-kernel - Re: [PATCH] i2c-gpio: Add support for new-style clients

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Date:	Fri, 15 Jun 2007 17:59:42 +0200
From:	Jean Delvare <khali@...ux-fr.org>
To:	Atsushi Nemoto <anemo@....ocn.ne.jp>
Cc:	hskinnemoen@...el.com, linux-kernel@...r.kernel.org,
	i2c@...sensors.org
Subject: Re: [PATCH] i2c-gpio: Add support for new-style clients

On Thu, 14 Jun 2007 15:40:46 +0900 (JST), Atsushi Nemoto wrote:
> On Thu, 14 Jun 2007 08:24:17 +0200, Jean Delvare <khali@...ux-fr.org> wrote:
> > > +	if (pdev->id == -1)
> > > +		ret = i2c_bit_add_bus(adap);
> > > +	else
> > > +		ret = i2c_bit_add_numbered_bus(adap);
> > >  	if (ret)
> > >  		goto err_add_bus;
> > >  
> > 
> > This isn't sufficient. Before you call i2c_bit_add_numbered_bus(adap),
> > you are supposed to set adap->nr to the desired i2c adapter number.
> 
> Oh, indeed.  That worked for me just I only used bus number 0.
> Here is a revised patch.
> 
> 
> Subject: [PATCH] i2c-gpio: Add support for new-style clients (take 2)
> 
> Use i2c_bit_add_numbered_bus() if platform_device id specified, so
> that the i2c-gpio adapter works well with new-style pre-declared
> devices.
> 
> Signed-off-by: Atsushi Nemoto <anemo@....ocn.ne.jp>
> ---
> diff --git a/drivers/i2c/busses/i2c-gpio.c b/drivers/i2c/busses/i2c-gpio.c
> index a7dd546..88c5735 100644
> --- a/drivers/i2c/busses/i2c-gpio.c
> +++ b/drivers/i2c/busses/i2c-gpio.c
> @@ -142,7 +142,12 @@ static int __init i2c_gpio_probe(struct platform_device *pdev)
>  	adap->algo_data = bit_data;
>  	adap->dev.parent = &pdev->dev;
>  
> -	ret = i2c_bit_add_bus(adap);
> +	if (pdev->id == -1)
> +		ret = i2c_bit_add_bus(adap);
> +	else {
> +		adap->nr = pdev->id;
> +		ret = i2c_bit_add_numbered_bus(adap);
> +	}
>  	if (ret)
>  		goto err_add_bus;
>  

That's better. Patch applied, thanks.

-- 
Jean Delvare
-
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