linux-kernel - Re: [PATCH 0/7 RFC] Handle I2C GPIO controllers with the OF (was: pca9539 I2C gpio expander)

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Date:	Fri, 17 Oct 2008 12:07:15 -0400
From:	"Steven A. Falco" <sfalco@...ris.com>
To:	avorontsov@...mvista.com
CC:	linux-kernel@...r.kernel.org,
	David Brownell <dbrownell@...rs.sourceforge.net>,
	Grant Likely <grant.likely@...retlab.ca>,
	Jean Delvare <khali@...ux-fr.org>,
	David Miller <davem@...emloft.net>, i2c@...sensors.org,
	linuxppc-dev@...abs.org
Subject: Re: [PATCH 0/7 RFC] Handle I2C GPIO controllers with the OF (was:
 pca9539 I2C gpio expander)

Anton Vorontsov wrote:
> Hi all,
> 
> Recently there was a question about I2C GPIO controllers and how should
> we handle them with the OpenFirmware and such.
> 
> Here is the attempt to "connect" I2C GPIO controllers to the
> "OpenFirmware" device tree, without writing an OF-specific bindings
> for each driver.
> 
> The salt is in these two patches:
> 
> [PATCH 3/7] of: fill the archdata for I2C devices
> ^ Here we're storing the device tree node into the I2C device.
> 
> [PATCH 5/7] of/gpio: implement of_dev_gpiochip_{add,remove} calls
> ^ And here we extracting the the stored node to put the registered
>   of_gpio_chip into that node.
> 
> 
> How does it look?

I've just tested this with a pca9539 chip attached to my Sequoia board,
and it works perfectly for me.  I don't have the mcu_mpc8349emitx.c file
in my tree, so I was not able to apply part 7 of 7, but the rest looks
fine.  Thanks for doing this.

Acked by: Steve Falco <sfalco@...ris.com>
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