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

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Message-Id: <20070614.154046.96688009.nemoto@toshiba-tops.co.jp>
Date:	Thu, 14 Jun 2007 15:40:46 +0900 (JST)
From:	Atsushi Nemoto <anemo@....ocn.ne.jp>
To:	khali@...ux-fr.org
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 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;
 
-
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