netdev - Re: [PATCH 2/3] net/fec: add device tree support

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Message-ID: <4DFDDFF4.8000305@snapgear.com>
Date:	Sun, 19 Jun 2011 21:39:32 +1000
From:	Greg Ungerer <gerg@...pgear.com>
To:	Shawn Guo <shawn.guo@...aro.org>
CC:	<linux-arm-kernel@...ts.infradead.org>, <patches@...aro.org>,
	<netdev@...r.kernel.org>, <devicetree-discuss@...ts.ozlabs.org>,
	Jason Liu <jason.hui@...aro.org>,
	<linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 2/3] net/fec: add device tree support


Hi Shawn,

On 06/19/2011 01:19 AM, Shawn Guo wrote:
> It adds device tree data parsing support for fec driver.
>
> Signed-off-by: Jason Liu<jason.hui@...aro.org>
> Signed-off-by: Shawn Guo<shawn.guo@...aro.org>
> Cc: David S. Miller<davem@...emloft.net>
> ---
>   Documentation/devicetree/bindings/net/fsl-fec.txt |   14 ++++++++++
>   drivers/net/fec.c                                 |   28 +++++++++++++++++++++
>   2 files changed, 42 insertions(+), 0 deletions(-)
>   create mode 100644 Documentation/devicetree/bindings/net/fsl-fec.txt
>
> diff --git a/Documentation/devicetree/bindings/net/fsl-fec.txt b/Documentation/devicetree/bindings/net/fsl-fec.txt
> new file mode 100644
> index 0000000..705111d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/fsl-fec.txt
> @@ -0,0 +1,14 @@
> +* Freescale Fast Ethernet Controller (FEC)
> +
> +Required properties:
> +- compatible : should be "fsl,<soc>-fec", "fsl,fec"
> +- reg : address and length of the register set for the device
> +- interrupts : should contain fec interrupt
> +
> +Example:
> +
> +fec@...ec000 {
> +	compatible = "fsl,imx51-fec", "fsl,fec";
> +	reg =<0x83fec000 0x4000>;
> +	interrupts =<87>;
> +};
> diff --git a/drivers/net/fec.c b/drivers/net/fec.c
> index 885d8ba..ef3d175 100644
> --- a/drivers/net/fec.c
> +++ b/drivers/net/fec.c
> @@ -44,6 +44,8 @@
>   #include<linux/platform_device.h>
>   #include<linux/phy.h>
>   #include<linux/fec.h>
> +#include<linux/of.h>
> +#include<linux/of_device.h>
>
>   #include<asm/cacheflush.h>
>
> @@ -78,6 +80,26 @@ static struct platform_device_id fec_devtype[] = {
>   	{ }
>   };
>
> +#ifdef CONFIG_OF
> +static const struct of_device_id fec_dt_ids[] = {
> +	{ .compatible = "fsl,fec", .data =&fec_devtype[0], },
> +	{},
> +};
> +
> +static const struct of_device_id *
> +fec_get_of_device_id(struct platform_device *pdev)
> +{
> +	return of_match_device(fec_dt_ids,&pdev->dev);
> +}
> +#else
> +#define fec_dt_ids NULL
> +static inline struct of_device_id *
> +fec_get_of_device_id(struct platform_device *pdev)
> +{
> +	return NULL;
> +}
> +#endif
> +
>   static unsigned char macaddr[ETH_ALEN];
>   module_param_array(macaddr, byte, NULL, 0);
>   MODULE_PARM_DESC(macaddr, "FEC Ethernet MAC address");
> @@ -1363,6 +1385,11 @@ fec_probe(struct platform_device *pdev)
>   	struct net_device *ndev;
>   	int i, irq, ret = 0;
>   	struct resource *r;
> +	const struct of_device_id *of_id;
> +
> +	of_id = fec_get_of_device_id(pdev);

fec_get_of_device_id() is defined inside of "#ifdef CONFIG_OF". This
use of it will break compilation when this is not defined.

Regards
Greg



> +	if (of_id)
> +		pdev->id_entry = (struct platform_device_id *) of_id->data;
>
>   	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>   	if (!r)
> @@ -1531,6 +1558,7 @@ static struct platform_driver fec_driver = {
>   #ifdef CONFIG_PM
>   		.pm	=&fec_pm_ops,
>   #endif
> +		.of_match_table = fec_dt_ids,
>   	},
>   	.id_table = fec_devtype,
>   	.probe	= fec_probe,


-- 
------------------------------------------------------------------------
Greg Ungerer  --  Principal Engineer        EMAIL:     gerg@...pgear.com
SnapGear Group, McAfee                      PHONE:       +61 7 3435 2888
8 Gardner Close,                            FAX:         +61 7 3891 3630
Milton, QLD, 4064, Australia                WEB: http://www.SnapGear.com
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