(no subject)

[Sascha Hauer]

The following adds devicetree support to the i2c core and
the fsl i2c driver.

Sascha

----------------------------------------------------------------
Sascha Hauer (5):
      i2c: Add missing result check
      i2c: remove dead code
      i2c: Add support for dynamic i2c bus numbers
      i2c: Add devicetree support
      i2c: fsl: Add devicetree probe support

 drivers/i2c/busses/i2c-imx.c | 10 ++++++
 drivers/i2c/i2c.c            | 76 ++++++++++++++++++++++++++++++++++----------
 include/i2c/i2c.h            |  1 +
 3 files changed, 70 insertions(+), 17 deletions(-)

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[PATCH 1/5] i2c: Add missing result check

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/i2c/i2c.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
index 4862df3..488b636 100644
--- a/drivers/i2c/i2c.c
+++ b/drivers/i2c/i2c.c
@@ -260,6 +260,10 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
 	client->dev.parent = &adapter->dev;
 
 	status = register_device(&client->dev);
+	if (status) {
+		free(client);
+		return NULL;
+	}
 
 #if 0
 	/* drivers may modify this initial i/o setup */
-- 
1.8.2.rc2


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[PATCH 2/5] i2c: remove dead code

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/i2c/i2c.c | 16 ----------------
 1 file changed, 16 deletions(-)

diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
index 488b636..53a11fe 100644
--- a/drivers/i2c/i2c.c
+++ b/drivers/i2c/i2c.c
@@ -265,23 +265,7 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
 		return NULL;
 	}
 
-#if 0
-	/* drivers may modify this initial i/o setup */
-	status = master->setup(client);
-	if (status < 0) {
-		printf("can't setup %s, status %d\n",
-		       client->dev.name, status);
-		goto fail;
-	}
-#endif
-
 	return client;
-
-#if 0
- fail:
-	free(proxy);
-	return NULL;
-#endif
 }
 EXPORT_SYMBOL(i2c_new_device);
 
-- 
1.8.2.rc2


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[PATCH 3/5] i2c: Add support for dynamic i2c bus numbers

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/i2c/i2c.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
index 53a11fe..ddf0082 100644
--- a/drivers/i2c/i2c.c
+++ b/drivers/i2c/i2c.c
@@ -384,8 +384,17 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
 {
 	int ret;
 
-	if (i2c_get_adapter(adapter->nr))
-		return -EBUSY;
+	if (adapter->nr < 0) {
+		int nr;
+
+		for (nr = 0;; nr++)
+			if (!i2c_get_adapter(nr))
+				break;
+		adapter->nr = nr;
+	} else {
+		if (i2c_get_adapter(adapter->nr))
+			return -EBUSY;
+	}
 
 	adapter->dev.id = adapter->nr;
 	strcpy(adapter->dev.name, "i2c");
-- 
1.8.2.rc2


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[PATCH 4/5] i2c: Add devicetree support

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/i2c/i2c.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 include/i2c/i2c.h |  1 +
 2 files changed, 46 insertions(+)

diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
index ddf0082..067224b 100644
--- a/drivers/i2c/i2c.c
+++ b/drivers/i2c/i2c.c
@@ -254,6 +254,7 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
 	client->dev.platform_data = chip->platform_data;
 	client->dev.id = DEVICE_ID_DYNAMIC;
 	client->dev.bus = &i2c_bus;
+	client->dev.device_node = chip->of_node;
 	client->adapter = adapter;
 	client->addr = chip->addr;
 
@@ -269,6 +270,44 @@ struct i2c_client *i2c_new_device(struct i2c_adapter *adapter,
 }
 EXPORT_SYMBOL(i2c_new_device);
 
+void of_i2c_register_devices(struct i2c_adapter *adap)
+{
+	struct device_node *n;
+
+	/* Only register child devices if the adapter has a node pointer set */
+	if (!IS_ENABLED(CONFIG_OFDEVICE) || !adap->dev.device_node)
+		return;
+
+	device_node_for_nach_child(adap->dev.device_node, n) {
+		struct i2c_board_info info = {};
+		struct i2c_client *result;
+		const __be32 *addr;
+		int len;
+
+		strcpy(info.type, n->name);
+		info.of_node = n;
+
+		addr = of_get_property(n, "reg", &len);
+		if (!addr || (len < sizeof(int))) {
+			dev_err(&adap->dev, "of_i2c: invalid reg on %s\n",
+				n->full_name);
+			continue;
+		}
+
+		info.addr = be32_to_cpup(addr);
+		if (info.addr > (1 << 10) - 1) {
+			dev_err(&adap->dev, "of_i2c: invalid addr=%x on %s\n",
+				info.addr, n->full_name);
+			continue;
+		}
+
+		result = i2c_new_device(adap, &info);
+		if (!result)
+			dev_err(&adap->dev, "of_i2c: Failure registering %s\n",
+			        n->full_name);
+	}
+}
+
 /**
  * i2c_new_dummy - return a new i2c device bound to a dummy driver
  * @adapter: the adapter managing the device
@@ -408,6 +447,8 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
 	/* populate children from any i2c device tables */
 	scan_boardinfo(adapter);
 
+	of_i2c_register_devices(adapter);
+
 	return 0;
 }
 EXPORT_SYMBOL(i2c_add_numbered_adapter);
@@ -417,6 +458,10 @@ static int i2c_match(struct device_d *dev, struct driver_d *drv)
 	if (!strcmp(dev->name, drv->name))
 		return 0;
 
+	if (IS_ENABLED(CONFIG_OFDEVICE) && dev->device_node &&
+			drv->of_compatible)
+		return of_match(dev, drv);
+
 	if (drv->id_table) {
 		struct platform_device_id *id = drv->id_table;
 
diff --git a/include/i2c/i2c.h b/include/i2c/i2c.h
index 7b59a51..3b4be45 100644
--- a/include/i2c/i2c.h
+++ b/include/i2c/i2c.h
@@ -102,6 +102,7 @@ struct i2c_board_info {
 	char		type[I2C_NAME_SIZE];	/**< name of device */
 	unsigned short	addr;			/**< stored in i2c_client.addr */
 	void		*platform_data;		/**< platform data for device */
+	struct device_node *of_node;
 };
 
 /**
-- 
1.8.2.rc2


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[PATCH 5/5] i2c: fsl: Add devicetree probe support

[Sascha Hauer]

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/i2c/busses/i2c-imx.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/i2c/busses/i2c-imx.c b/drivers/i2c/busses/i2c-imx.c
index 9fcfd5c..c607bcb 100644
--- a/drivers/i2c/busses/i2c-imx.c
+++ b/drivers/i2c/busses/i2c-imx.c
@@ -545,6 +545,7 @@ static int __init i2c_fsl_probe(struct device_d *pdev)
 	i2c_fsl->adapter.master_xfer = i2c_fsl_xfer;
 	i2c_fsl->adapter.nr = pdev->id;
 	i2c_fsl->adapter.dev.parent = pdev;
+	i2c_fsl->adapter.dev.device_node = pdev->device_node;
 	i2c_fsl->base = dev_request_mem_region(pdev, 0);
 	i2c_fsl->dfsrr = -1;
 
@@ -572,8 +573,17 @@ fail:
 	return ret;
 }
 
+static __maybe_unused struct of_device_id imx_i2c_dt_ids[] = {
+	{
+		.compatible = "fsl,imx21-i2c",
+	}, {
+		/* sentinel */
+	}
+};
+
 static struct driver_d i2c_fsl_driver = {
 	.probe	= i2c_fsl_probe,
 	.name	= DRIVER_NAME,
+	.of_compatible = DRV_OF_COMPAT(imx_i2c_dt_ids),
 };
 device_platform_driver(i2c_fsl_driver);
-- 
1.8.2.rc2


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Re: [SPAM] [PATCH 3/5] i2c: Add support for dynamic i2c bus numbers

[Jean-Christophe PLAGNIOL-VILLARD]

On 22:11 Mon 20 May     , Sascha Hauer wrote:
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  drivers/i2c/i2c.c | 13 +++++++++++--
>  1 file changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
> index 53a11fe..ddf0082 100644
> --- a/drivers/i2c/i2c.c
> +++ b/drivers/i2c/i2c.c
> @@ -384,8 +384,17 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
>  {
>  	int ret;
>  
> -	if (i2c_get_adapter(adapter->nr))
> -		return -EBUSY;
> +	if (adapter->nr < 0) {
> +		int nr;
> +
> +		for (nr = 0;; nr++)
> +			if (!i2c_get_adapter(nr))
> +				break;
> +		adapter->nr = nr;
> +	} else {
> +		if (i2c_get_adapter(adapter->nr))
> +			return -EBUSY;
> +	}

I send a patch exactly the same on spi and you refuse it

Best Regards,
J.

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Re: [SPAM] [PATCH 3/5] i2c: Add support for dynamic i2c bus numbers

[Sascha Hauer]

On Tue, May 21, 2013 at 12:27:47AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> On 22:11 Mon 20 May     , Sascha Hauer wrote:
> > Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> > ---
> >  drivers/i2c/i2c.c | 13 +++++++++++--
> >  1 file changed, 11 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/i2c/i2c.c b/drivers/i2c/i2c.c
> > index 53a11fe..ddf0082 100644
> > --- a/drivers/i2c/i2c.c
> > +++ b/drivers/i2c/i2c.c
> > @@ -384,8 +384,17 @@ int i2c_add_numbered_adapter(struct i2c_adapter *adapter)
> >  {
> >  	int ret;
> >  
> > -	if (i2c_get_adapter(adapter->nr))
> > -		return -EBUSY;
> > +	if (adapter->nr < 0) {
> > +		int nr;
> > +
> > +		for (nr = 0;; nr++)
> > +			if (!i2c_get_adapter(nr))
> > +				break;
> > +		adapter->nr = nr;
> > +	} else {
> > +		if (i2c_get_adapter(adapter->nr))
> > +			return -EBUSY;
> > +	}
> 
> I send a patch exactly the same on spi and you refuse it

The time you sent it we talked about platform devices and I still think
that it's not a good idea to register the SPI masters with dynamic bus
numbers and to have statically assigned numbers in the spi_board_info.

Sascha

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