linux-kernel - Re: [PATCH 3/3] i2c-designware: add OF binding support

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Date:	Tue, 23 Aug 2011 22:31:30 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Ben Dooks <ben-linux@...ff.org>
CC:	Grant Likely <grant.likely@...retlab.ca>,
	linux-kernel@...r.kernel.org, linux-i2c@...r.kernel.org,
	devicetree-discuss@...ts.ozlabs.org
Subject: Re: [PATCH 3/3] i2c-designware: add OF binding support

Ben,

On 08/05/2011 04:24 PM, Rob Herring wrote:
> From: Rob Herring <rob.herring@...xeda.com>
> 
> Add of_match_table and DT style i2c registration to designware i2c
> driver.
> 
> Signed-off-by: Rob Herring <rob.herring@...xeda.com>
> Acked-by: Grant Likely <grant.likely@...retlab.ca>
> Cc: devicetree-discuss@...ts.ozlabs.org
> Cc: Ben Dooks <ben-linux@...ff.org>
> Cc: linux-i2c@...r.kernel.org
> ---

Any comments on this? If not, will you apply to your tree?

Rob

>  Documentation/devicetree/bindings/i2c/dw-i2c.txt |   23 ++++++++++++++++++++++
>  drivers/i2c/busses/i2c-designware.c              |    8 +++++++
>  2 files changed, 31 insertions(+), 0 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/i2c/dw-i2c.txt
> 
> diff --git a/Documentation/devicetree/bindings/i2c/dw-i2c.txt b/Documentation/devicetree/bindings/i2c/dw-i2c.txt
> new file mode 100644
> index 0000000..cbcb404
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/i2c/dw-i2c.txt
> @@ -0,0 +1,23 @@
> +* Synopsys DesignWare I2C
> +
> +Required properties :
> +
> + - compatible : should be "snps,designware-i2c"
> + - reg : Offset and length of the register set for the device
> + - interrupts : <IRQ> where IRQ is the interrupt number.
> +
> +Recommended properties :
> +
> + - clock-frequency : desired I2C bus clock frequency in Hz.
> +
> +Example :
> +
> +	i2c@...00 {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +		compatible = "snps,designware-i2c";
> +		reg = <0xf0000 0x1000>;
> +		interrupts = <11>;
> +		clock-frequency = <400000>;
> +	};
> +
> diff --git a/drivers/i2c/busses/i2c-designware.c b/drivers/i2c/busses/i2c-designware.c
> index b7a51c4..0223b98 100644
> --- a/drivers/i2c/busses/i2c-designware.c
> +++ b/drivers/i2c/busses/i2c-designware.c
> @@ -769,6 +769,7 @@ static int __devinit dw_i2c_probe(struct platform_device *pdev)
>  			sizeof(adap->name));
>  	adap->algo = &i2c_dw_algo;
>  	adap->dev.parent = &pdev->dev;
> +	adap->dev.of_node = pdev->dev.of_node;
>  
>  	adap->nr = pdev->id;
>  	r = i2c_add_numbered_adapter(adap);
> @@ -819,6 +820,12 @@ static int __devexit dw_i2c_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static const struct of_device_id dw_i2c_of_match[] = {
> +	{ .compatible = "snps,designware-i2c", },
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, dw_i2c_of_match);
> +
>  /* work with hotplug and coldplug */
>  MODULE_ALIAS("platform:i2c_designware");
>  
> @@ -827,6 +834,7 @@ static struct platform_driver dw_i2c_driver = {
>  	.driver		= {
>  		.name	= "i2c_designware",
>  		.owner	= THIS_MODULE,
> +		.of_match_table = dw_i2c_of_match,
>  	},
>  };
>  

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