i2c-ocores changes

i2c-ocores changes

[Jonas Bonn]

Here are a couple of patches that fix up the initialization path of
the i2c-cores driver:

i)  Support for device tree configuration of i2c devices
ii) Use devres routines in the resource reservation paths for device
initialization

This has been tested on an OpenRISC 1200 board; the OpenRISC Linux port
depends on device trees for device enumeration.

/Jonas

[PATCH 1/2] i2c-ocores: Adapt for device tree

[Jonas Bonn]

This patch adapts the i2c-ocores driver for being defined and configured via
a device tree description.

The device tree bits need to be protected by CONFIG_OF guards as this is
still an optional feature.

Signed-off-by: Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org>
---
 drivers/i2c/busses/i2c-ocores.c |   63 ++++++++++++++++++++++++++++++++++-----
 1 files changed, 55 insertions(+), 8 deletions(-)

diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index 0070371..86a536c 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -210,6 +210,31 @@ static struct i2c_adapter ocores_adapter = {
 	.algo		= &ocores_algorithm,
 };
 
+#ifdef CONFIG_OF
+static int ocores_i2c_of_probe(struct platform_device* pdev,
+				struct ocores_i2c* i2c)
+{
+	int* val;
+
+	val = (int*) of_get_property(pdev->dev.of_node, "regstep", NULL);
+	if (!val) {
+		dev_err(&pdev->dev, "Missing required paramter 'regstep'");
+		return -ENODEV;
+	}
+
+	i2c->regstep = *val;
+	val = (int*) of_get_property(pdev->dev.of_node, "clock_khz", NULL);
+	if (!val) {
+		dev_err(&pdev->dev, "Missing required paramter 'clock_khz'");
+		return -ENODEV;
+	}
+	i2c->clock_khz = *val;
+
+	return 0;
+}
+#else
+#define ocores_i2c_of_probe(pdev,i2c) -ENODEV
+#endif
 
 static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 {
@@ -227,10 +252,6 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	if (!res2)
 		return -ENODEV;
 
-	pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;
-	if (!pdata)
-		return -ENODEV;
-
 	i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
 	if (!i2c)
 		return -ENOMEM;
@@ -249,8 +270,16 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 		goto map_failed;
 	}
 
-	i2c->regstep = pdata->regstep;
-	i2c->clock_khz = pdata->clock_khz;
+	pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;
+	if (pdata) {
+		i2c->regstep = pdata->regstep;
+		i2c->clock_khz = pdata->clock_khz;
+	} else {
+		ret = ocores_i2c_of_probe(pdev, i2c);
+		if (ret)
+			return ret;
+	}
+
 	ocores_init(i2c);
 
 	init_waitqueue_head(&i2c->wait);
@@ -265,6 +294,9 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	i2c->adap = ocores_adapter;
 	i2c_set_adapdata(&i2c->adap, i2c);
 	i2c->adap.dev.parent = &pdev->dev;
+#ifdef CONFIG_OF
+	i2c->adap.dev.of_node = pdev->dev.of_node;
+#endif
 
 	/* add i2c adapter to i2c tree */
 	ret = i2c_add_adapter(&i2c->adap);
@@ -274,8 +306,10 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	}
 
 	/* add in known devices to the bus */
-	for (i = 0; i < pdata->num_devices; i++)
-		i2c_new_device(&i2c->adap, pdata->devices + i);
+	if (pdata) {
+		for (i = 0; i < pdata->num_devices; i++)
+			i2c_new_device(&i2c->adap, pdata->devices + i);
+	}
 
 	return 0;
 
@@ -344,6 +378,16 @@ static int ocores_i2c_resume(struct platform_device *pdev)
 #define ocores_i2c_resume	NULL
 #endif
 
+#ifdef CONFIG_OF
+static struct of_device_id ocores_i2c_match[] = {
+        {
+                .compatible = "opencores,i2c-ocores",
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, ocores_i2c_match);
+#endif
+
 /* work with hotplug and coldplug */
 MODULE_ALIAS("platform:ocores-i2c");
 
@@ -355,6 +399,9 @@ static struct platform_driver ocores_i2c_driver = {
 	.driver  = {
 		.owner = THIS_MODULE,
 		.name = "ocores-i2c",
+#ifdef CONFIG_OF
+                .of_match_table = ocores_i2c_match,
+#endif
 	},
 };
 
-- 
1.7.1

[PATCH 2/2] i2c-ocores: Use devres for resource allocation

[Jonas Bonn]

This patch converts the i2c-cores driver to use devres routines for
resource allocation.

Signed-off-by: Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org>
---
 drivers/i2c/busses/i2c-ocores.c |   46 +++++++++-----------------------------
 1 files changed, 11 insertions(+), 35 deletions(-)

diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
index 86a536c..d10c51a 100644
--- a/drivers/i2c/busses/i2c-ocores.c
+++ b/drivers/i2c/busses/i2c-ocores.c
@@ -252,22 +252,21 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	if (!res2)
 		return -ENODEV;
 
-	i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
+	i2c = devm_kzalloc(&pdev->dev, sizeof(*i2c), GFP_KERNEL);
 	if (!i2c)
 		return -ENOMEM;
 
-	if (!request_mem_region(res->start, resource_size(res),
-				pdev->name)) {
+	if (!devm_request_mem_region(&pdev->dev, res->start,
+				     resource_size(res), pdev->name)) {
 		dev_err(&pdev->dev, "Memory region busy\n");
-		ret = -EBUSY;
-		goto request_mem_failed;
+		return -EBUSY;
 	}
 
-	i2c->base = ioremap(res->start, resource_size(res));
+	i2c->base = devm_ioremap_nocache(&pdev->dev, res->start,
+					 resource_size(res));
 	if (!i2c->base) {
 		dev_err(&pdev->dev, "Unable to map registers\n");
-		ret = -EIO;
-		goto map_failed;
+		return -EIO;
 	}
 
 	pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;
@@ -283,10 +282,11 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	ocores_init(i2c);
 
 	init_waitqueue_head(&i2c->wait);
-	ret = request_irq(res2->start, ocores_isr, 0, pdev->name, i2c);
+	ret = devm_request_irq(&pdev->dev, res2->start, ocores_isr, 0,
+			       pdev->name, i2c);
 	if (ret) {
 		dev_err(&pdev->dev, "Cannot claim IRQ\n");
-		goto request_irq_failed;
+		return ret;
 	}
 
 	/* hook up driver to tree */
@@ -302,7 +302,7 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	ret = i2c_add_adapter(&i2c->adap);
 	if (ret) {
 		dev_err(&pdev->dev, "Failed to add adapter\n");
-		goto add_adapter_failed;
+		return ret;
 	}
 
 	/* add in known devices to the bus */
@@ -312,23 +312,11 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
 	}
 
 	return 0;
-
-add_adapter_failed:
-	free_irq(res2->start, i2c);
-request_irq_failed:
-	iounmap(i2c->base);
-map_failed:
-	release_mem_region(res->start, resource_size(res));
-request_mem_failed:
-	kfree(i2c);
-
-	return ret;
 }
 
 static int __devexit ocores_i2c_remove(struct platform_device* pdev)
 {
 	struct ocores_i2c *i2c = platform_get_drvdata(pdev);
-	struct resource *res;
 
 	/* disable i2c logic */
 	oc_setreg(i2c, OCI2C_CONTROL, oc_getreg(i2c, OCI2C_CONTROL)
@@ -338,18 +326,6 @@ static int __devexit ocores_i2c_remove(struct platform_device* pdev)
 	i2c_del_adapter(&i2c->adap);
 	platform_set_drvdata(pdev, NULL);
 
-	res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
-	if (res)
-		free_irq(res->start, i2c);
-
-	iounmap(i2c->base);
-
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res)
-		release_mem_region(res->start, resource_size(res));
-
-	kfree(i2c);
-
 	return 0;
 }
 
-- 
1.7.1

Re: [PATCH 1/2] i2c-ocores: Adapt for device tree

[Wolfram Sang]

[-- Attachment #1: Type: text/plain, Size: 4717 bytes --]

Hi,

quick review (hopefully not too quick)...

On Wed, Nov 24, 2010 at 03:09:48PM +0100, Jonas Bonn wrote:
> This patch adapts the i2c-ocores driver for being defined and configured via
> a device tree description.
> 
> The device tree bits need to be protected by CONFIG_OF guards as this is
> still an optional feature.
> 
> Signed-off-by: Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org>
> ---
>  drivers/i2c/busses/i2c-ocores.c |   63 ++++++++++++++++++++++++++++++++++-----
>  1 files changed, 55 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
> index 0070371..86a536c 100644
> --- a/drivers/i2c/busses/i2c-ocores.c
> +++ b/drivers/i2c/busses/i2c-ocores.c
> @@ -210,6 +210,31 @@ static struct i2c_adapter ocores_adapter = {
>  	.algo		= &ocores_algorithm,
>  };
>  
> +#ifdef CONFIG_OF
> +static int ocores_i2c_of_probe(struct platform_device* pdev,
> +				struct ocores_i2c* i2c)
> +{
> +	int* val;
> +
> +	val = (int*) of_get_property(pdev->dev.of_node, "regstep", NULL);
> +	if (!val) {
> +		dev_err(&pdev->dev, "Missing required paramter 'regstep'");
> +		return -ENODEV;
> +	}

New properties need to be documented (e.g. like here¹). What is regstep?

¹ http://lists.ozlabs.org/pipermail/devicetree-discuss/2010-November/003569.html

> +
> +	i2c->regstep = *val;
> +	val = (int*) of_get_property(pdev->dev.of_node, "clock_khz", NULL);
> +	if (!val) {
> +		dev_err(&pdev->dev, "Missing required paramter 'clock_khz'");
> +		return -ENODEV;
> +	}

Other i2c-drivers use "clock-frequency", you should as well.

> +	i2c->clock_khz = *val;
> +
> +	return 0;
> +}
> +#else
> +#define ocores_i2c_of_probe(pdev,i2c) -ENODEV
> +#endif
>  
>  static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  {
> @@ -227,10 +252,6 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  	if (!res2)
>  		return -ENODEV;
>  
> -	pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;
> -	if (!pdata)
> -		return -ENODEV;
> -
>  	i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
>  	if (!i2c)
>  		return -ENOMEM;
> @@ -249,8 +270,16 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  		goto map_failed;
>  	}
>  
> -	i2c->regstep = pdata->regstep;
> -	i2c->clock_khz = pdata->clock_khz;
> +	pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;

The cast can be dropped.

> +	if (pdata) {
> +		i2c->regstep = pdata->regstep;
> +		i2c->clock_khz = pdata->clock_khz;
> +	} else {
> +		ret = ocores_i2c_of_probe(pdev, i2c);
> +		if (ret)
> +			return ret;
> +	}
> +
>  	ocores_init(i2c);
>  
>  	init_waitqueue_head(&i2c->wait);
> @@ -265,6 +294,9 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  	i2c->adap = ocores_adapter;
>  	i2c_set_adapdata(&i2c->adap, i2c);
>  	i2c->adap.dev.parent = &pdev->dev;
> +#ifdef CONFIG_OF
> +	i2c->adap.dev.of_node = pdev->dev.of_node;
> +#endif

No need for the ifdef here.

>  
>  	/* add i2c adapter to i2c tree */
>  	ret = i2c_add_adapter(&i2c->adap);
> @@ -274,8 +306,10 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  	}
>  
>  	/* add in known devices to the bus */
> -	for (i = 0; i < pdata->num_devices; i++)
> -		i2c_new_device(&i2c->adap, pdata->devices + i);
> +	if (pdata) {
> +		for (i = 0; i < pdata->num_devices; i++)
> +			i2c_new_device(&i2c->adap, pdata->devices + i);
> +	}
>  
>  	return 0;
>  
> @@ -344,6 +378,16 @@ static int ocores_i2c_resume(struct platform_device *pdev)
>  #define ocores_i2c_resume	NULL
>  #endif
>  
> +#ifdef CONFIG_OF
> +static struct of_device_id ocores_i2c_match[] = {
> +        {
> +                .compatible = "opencores,i2c-ocores",
> +        },
> +        {},
> +};
> +MODULE_DEVICE_TABLE(of, ocores_i2c_match);
> +#endif

ditto

> +
>  /* work with hotplug and coldplug */
>  MODULE_ALIAS("platform:ocores-i2c");
>  
> @@ -355,6 +399,9 @@ static struct platform_driver ocores_i2c_driver = {
>  	.driver  = {
>  		.owner = THIS_MODULE,
>  		.name = "ocores-i2c",
> +#ifdef CONFIG_OF
> +                .of_match_table = ocores_i2c_match,
> +#endif

ditto

>  	},
>  };
>  
> -- 
> 1.7.1
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-i2c" in
> the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 198 bytes --]

Re: [PATCH 1/2] i2c-ocores: Adapt for device tree

[Grant Likely]

On Wed, Nov 24, 2010 at 7:09 AM, Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org> wrote:
> This patch adapts the i2c-ocores driver for being defined and configured via
> a device tree description.
>
> The device tree bits need to be protected by CONFIG_OF guards as this is
> still an optional feature.
>
> Signed-off-by: Jonas Bonn <jonas-A9uVI2HLR7kOP4wsBPIw7w@public.gmane.org>
> ---
>  drivers/i2c/busses/i2c-ocores.c |   63 ++++++++++++++++++++++++++++++++++-----
>  1 files changed, 55 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-ocores.c b/drivers/i2c/busses/i2c-ocores.c
> index 0070371..86a536c 100644
> --- a/drivers/i2c/busses/i2c-ocores.c
> +++ b/drivers/i2c/busses/i2c-ocores.c
> @@ -210,6 +210,31 @@ static struct i2c_adapter ocores_adapter = {
>        .algo           = &ocores_algorithm,
>  };
>
> +#ifdef CONFIG_OF
> +static int ocores_i2c_of_probe(struct platform_device* pdev,
> +                               struct ocores_i2c* i2c)
> +{
> +       int* val;

__be32 *val;

> +
> +       val = (int*) of_get_property(pdev->dev.of_node, "regstep", NULL);

of_get_property returns a void*.  Drop the unnecessary cast.

> +       if (!val) {
> +               dev_err(&pdev->dev, "Missing required paramter 'regstep'");

spelling: parameter

> +               return -ENODEV;
> +       }
> +
> +       i2c->regstep = *val;

i2c->regstep = be32_to_cpup(val);

> +       val = (int*) of_get_property(pdev->dev.of_node, "clock_khz", NULL);

Drop the cast.  It is also considered bad form to use '_' in property
names.  Use '-' instead.  Traditionally, clock frequencies are
specified in Hz (not kHz), and the property name is something like
'bus-frequency' or 'clock-frequency'.

> +       if (!val) {
> +               dev_err(&pdev->dev, "Missing required paramter 'clock_khz'");
> +               return -ENODEV;
> +       }
> +       i2c->clock_khz = *val;

i2c->clock_khz = be32_to_cpup(val);

> +
> +       return 0;
> +}
> +#else
> +#define ocores_i2c_of_probe(pdev,i2c) -ENODEV
> +#endif
>
>  static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>  {
> @@ -227,10 +252,6 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>        if (!res2)
>                return -ENODEV;
>
> -       pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;
> -       if (!pdata)
> -               return -ENODEV;
> -
>        i2c = kzalloc(sizeof(*i2c), GFP_KERNEL);
>        if (!i2c)
>                return -ENOMEM;
> @@ -249,8 +270,16 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>                goto map_failed;
>        }
>
> -       i2c->regstep = pdata->regstep;
> -       i2c->clock_khz = pdata->clock_khz;
> +       pdata = (struct ocores_i2c_platform_data*) pdev->dev.platform_data;

Drop the unnecessary cast

> +       if (pdata) {
> +               i2c->regstep = pdata->regstep;
> +               i2c->clock_khz = pdata->clock_khz;
> +       } else {
> +               ret = ocores_i2c_of_probe(pdev, i2c);
> +               if (ret)
> +                       return ret;
> +       }
> +
>        ocores_init(i2c);
>
>        init_waitqueue_head(&i2c->wait);
> @@ -265,6 +294,9 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>        i2c->adap = ocores_adapter;
>        i2c_set_adapdata(&i2c->adap, i2c);
>        i2c->adap.dev.parent = &pdev->dev;
> +#ifdef CONFIG_OF
> +       i2c->adap.dev.of_node = pdev->dev.of_node;
> +#endif
>
>        /* add i2c adapter to i2c tree */
>        ret = i2c_add_adapter(&i2c->adap);
> @@ -274,8 +306,10 @@ static int __devinit ocores_i2c_probe(struct platform_device *pdev)
>        }
>
>        /* add in known devices to the bus */
> -       for (i = 0; i < pdata->num_devices; i++)
> -               i2c_new_device(&i2c->adap, pdata->devices + i);
> +       if (pdata) {
> +               for (i = 0; i < pdata->num_devices; i++)
> +                       i2c_new_device(&i2c->adap, pdata->devices + i);
> +       }
>
>        return 0;
>
> @@ -344,6 +378,16 @@ static int ocores_i2c_resume(struct platform_device *pdev)
>  #define ocores_i2c_resume      NULL
>  #endif
>
> +#ifdef CONFIG_OF
> +static struct of_device_id ocores_i2c_match[] = {
> +        {
> +                .compatible = "opencores,i2c-ocores",

Is this binding documented somewhere?  If not, you can use devicetree.org

> +        },
> +        {},
> +};
> +MODULE_DEVICE_TABLE(of, ocores_i2c_match);
> +#endif
> +
>  /* work with hotplug and coldplug */
>  MODULE_ALIAS("platform:ocores-i2c");
>
> @@ -355,6 +399,9 @@ static struct platform_driver ocores_i2c_driver = {
>        .driver  = {
>                .owner = THIS_MODULE,
>                .name = "ocores-i2c",
> +#ifdef CONFIG_OF
> +                .of_match_table = ocores_i2c_match,
> +#endif
>        },
>  };
>
> --
> 1.7.1
>
> _______________________________________________
> devicetree-discuss mailing list
> devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org
> https://lists.ozlabs.org/listinfo/devicetree-discuss
>



-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.

Re: [PATCH 1/2] i2c-ocores: Adapt for device tree

[Jonas Bonn]

On Wed, 2010-11-24 at 15:58 +0100, Wolfram Sang wrote:
> Hi,
> 
> quick review (hopefully not too quick)...
> 

Thanks... see my comments below.

> > +	val = (int*) of_get_property(pdev->dev.of_node, "regstep", NULL);
> > +	if (!val) {
> > +		dev_err(&pdev->dev, "Missing required paramter 'regstep'");
> > +		return -ENODEV;
> > +	}
> 
> New properties need to be documented (e.g. like here¹). What is regstep?
> 
> ¹ http://lists.ozlabs.org/pipermail/devicetree-discuss/2010-November/003569.html
> 

While I agree that these parameters need documentation, I haven't seen
that there is an agreed upon place to put such documentation as of yet.
I followed your link but didn't find the corresponding document in the
kernel tree.  Should I really be putting my documentation in the
Documentation/powerpc directory?

> >  	i2c->adap = ocores_adapter;
> >  	i2c_set_adapdata(&i2c->adap, i2c);
> >  	i2c->adap.dev.parent = &pdev->dev;
> > +#ifdef CONFIG_OF
> > +	i2c->adap.dev.of_node = pdev->dev.of_node;
> > +#endif
> 
> No need for the ifdef here.
> 

Why?  of_node is protected by CONFIG_OF in linux/device.h

> >  
> > +#ifdef CONFIG_OF
> > +static struct of_device_id ocores_i2c_match[] = {
> > +        {
> > +                .compatible = "opencores,i2c-ocores",
> > +        },
> > +        {},
> > +};
> > +MODULE_DEVICE_TABLE(of, ocores_i2c_match);
> > +#endif
> 
> ditto

Dropping the ifdef begets a build warning...

> >  		.name = "ocores-i2c",
> > +#ifdef CONFIG_OF
> > +                .of_match_table = ocores_i2c_match,
> > +#endif
> 
> ditto

Same here, of_match_table is protected by CONFIG_OF.  How is this ifdef
not necessary?

Thanks again for the review.
Cheers,
Jonas

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Re: [PATCH 1/2] i2c-ocores: Adapt for device tree

[Wolfram Sang]

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> While I agree that these parameters need documentation, I haven't seen
> that there is an agreed upon place to put such documentation as of yet.
> I followed your link but didn't find the corresponding document in the
> kernel tree.

Because it has not been applied yet; that was the "template" patch I
could dig up fastest.

> Should I really be putting my documentation in the
> Documentation/powerpc directory?

Not necessarily. You could post a patch moving the generic parts to a
better location, too :)

> > > +#ifdef CONFIG_OF
> > > +	i2c->adap.dev.of_node = pdev->dev.of_node;
> > > +#endif
> > 
> > No need for the ifdef here.
> > 
> 
> Why?  of_node is protected by CONFIG_OF in linux/device.h

Ehrm, seems my mind broke :( Apologies, I probably was mixing it up with
another issue.

Regards,

   Wolfram

-- 
Pengutronix e.K.                           | Wolfram Sang                |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |

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