[PATCH] Convert pfc8563 i2c driver from old style to new style

[PATCH] Convert pfc8563 i2c driver from old style to new style

[Jon Smirl]

Convert pfc8563 i2c driver from old style to new style.

Signed-off-by: Jon Smirl <jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---

 drivers/rtc/rtc-pcf8563.c |  107 +++++++++++----------------------------------
 1 files changed, 27 insertions(+), 80 deletions(-)


diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index b3317fc..8eff549 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -25,10 +25,6 @@
  * located at 0x51 will pass the validation routine due to
  * the way the registers are implemented.
  */
-static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
-
-/* Module parameters */
-I2C_CLIENT_INSMOD;
 
 #define PCF8563_REG_ST1		0x00 /* status */
 #define PCF8563_REG_ST2		0x01
@@ -72,9 +68,6 @@ struct pcf8563 {
 	int c_polarity;	/* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
 };
 
-static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
-static int pcf8563_detach(struct i2c_client *client);
-
 /*
  * In the routines that deal directly with the pcf8563 hardware, we use
  * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
@@ -257,98 +250,52 @@ static const struct rtc_class_ops pcf8563_rtc_ops = {
 	.set_time	= pcf8563_rtc_set_time,
 };
 
-static int pcf8563_attach(struct i2c_adapter *adapter)
+static int pcf8563_remove(struct i2c_client *client)
 {
-	return i2c_probe(adapter, &addr_data, pcf8563_probe);
+	struct rtc_device *rtc = i2c_get_clientdata(client);
+
+	if (rtc)
+		rtc_device_unregister(rtc);
+
+	return 0;
 }
 
+static struct i2c_device_id pcf8563_id[] = {
+	{"pcf8563", 0},
+	{"rtc8564", 0},
+	{},
+};
+MODULE_DEVICE_TABLE(i2c, pcf8563_id);
+
+static int pcf8563_probe(struct i2c_client *client, const struct i2c_device_id *id);
+
 static struct i2c_driver pcf8563_driver = {
 	.driver		= {
-		.name	= "pcf8563",
+		.name	= "rtc-pcf8563",
 	},
 	.id		= I2C_DRIVERID_PCF8563,
-	.attach_adapter = &pcf8563_attach,
-	.detach_client	= &pcf8563_detach,
+	.probe = &pcf8563_probe,
+	.remove = &pcf8563_remove,
+	.id_table	= pcf8563_id,
 };
 
-static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
+static int pcf8563_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
-	struct pcf8563 *pcf8563;
-	struct i2c_client *client;
+	int result;
 	struct rtc_device *rtc;
 
-	int err = 0;
-
-	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
-
-	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
-		err = -ENODEV;
-		goto exit;
-	}
-
-	if (!(pcf8563 = kzalloc(sizeof(struct pcf8563), GFP_KERNEL))) {
-		err = -ENOMEM;
-		goto exit;
-	}
-
-	client = &pcf8563->client;
-	client->addr = address;
-	client->driver = &pcf8563_driver;
-	client->adapter	= adapter;
-
-	strlcpy(client->name, pcf8563_driver.driver.name, I2C_NAME_SIZE);
-
-	/* Verify the chip is really an PCF8563 */
-	if (kind < 0) {
-		if (pcf8563_validate_client(client) < 0) {
-			err = -ENODEV;
-			goto exit_kfree;
-		}
-	}
-
-	/* Inform the i2c layer */
-	if ((err = i2c_attach_client(client)))
-		goto exit_kfree;
-
-	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
+	result = pcf8563_validate_client(client);
+	if (result)
+		return result;
 
 	rtc = rtc_device_register(pcf8563_driver.driver.name, &client->dev,
 				&pcf8563_rtc_ops, THIS_MODULE);
-
-	if (IS_ERR(rtc)) {
-		err = PTR_ERR(rtc);
-		goto exit_detach;
-	}
+	if (IS_ERR(rtc))
+		return PTR_ERR(rtc);
 
 	i2c_set_clientdata(client, rtc);
 
 	return 0;
-
-exit_detach:
-	i2c_detach_client(client);
-
-exit_kfree:
-	kfree(pcf8563);
-
-exit:
-	return err;
-}
-
-static int pcf8563_detach(struct i2c_client *client)
-{
-	struct pcf8563 *pcf8563 = container_of(client, struct pcf8563, client);
-	int err;
-	struct rtc_device *rtc = i2c_get_clientdata(client);
-
-	if (rtc)
-		rtc_device_unregister(rtc);
-
-	if ((err = i2c_detach_client(client)))
-		return err;
-
-	kfree(pcf8563);
-
-	return 0;
 }
 
 static int __init pcf8563_init(void)


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Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Jon Smirl]

Any final objections to this patch? Jean can you pick it up?

On 1/21/08, Jon Smirl <jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> Convert pfc8563 i2c driver from old style to new style.
>
> Signed-off-by: Jon Smirl <jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>
>  drivers/rtc/rtc-pcf8563.c |  107 +++++++++++----------------------------------
>  1 files changed, 27 insertions(+), 80 deletions(-)
>
>
> diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
> index b3317fc..8eff549 100644
> --- a/drivers/rtc/rtc-pcf8563.c
> +++ b/drivers/rtc/rtc-pcf8563.c
> @@ -25,10 +25,6 @@
>   * located at 0x51 will pass the validation routine due to
>   * the way the registers are implemented.
>   */
> -static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
> -
> -/* Module parameters */
> -I2C_CLIENT_INSMOD;
>
>  #define PCF8563_REG_ST1                0x00 /* status */
>  #define PCF8563_REG_ST2                0x01
> @@ -72,9 +68,6 @@ struct pcf8563 {
>         int c_polarity; /* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
>  };
>
> -static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
> -static int pcf8563_detach(struct i2c_client *client);
> -
>  /*
>   * In the routines that deal directly with the pcf8563 hardware, we use
>   * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
> @@ -257,98 +250,52 @@ static const struct rtc_class_ops pcf8563_rtc_ops = {
>         .set_time       = pcf8563_rtc_set_time,
>  };
>
> -static int pcf8563_attach(struct i2c_adapter *adapter)
> +static int pcf8563_remove(struct i2c_client *client)
>  {
> -       return i2c_probe(adapter, &addr_data, pcf8563_probe);
> +       struct rtc_device *rtc = i2c_get_clientdata(client);
> +
> +       if (rtc)
> +               rtc_device_unregister(rtc);
> +
> +       return 0;
>  }
>
> +static struct i2c_device_id pcf8563_id[] = {
> +       {"pcf8563", 0},
> +       {"rtc8564", 0},
> +       {},
> +};
> +MODULE_DEVICE_TABLE(i2c, pcf8563_id);
> +
> +static int pcf8563_probe(struct i2c_client *client, const struct i2c_device_id *id);
> +
>  static struct i2c_driver pcf8563_driver = {
>         .driver         = {
> -               .name   = "pcf8563",
> +               .name   = "rtc-pcf8563",
>         },
>         .id             = I2C_DRIVERID_PCF8563,
> -       .attach_adapter = &pcf8563_attach,
> -       .detach_client  = &pcf8563_detach,
> +       .probe = &pcf8563_probe,
> +       .remove = &pcf8563_remove,
> +       .id_table       = pcf8563_id,
>  };
>
> -static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
> +static int pcf8563_probe(struct i2c_client *client, const struct i2c_device_id *id)
>  {
> -       struct pcf8563 *pcf8563;
> -       struct i2c_client *client;
> +       int result;
>         struct rtc_device *rtc;
>
> -       int err = 0;
> -
> -       dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
> -
> -       if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
> -               err = -ENODEV;
> -               goto exit;
> -       }
> -
> -       if (!(pcf8563 = kzalloc(sizeof(struct pcf8563), GFP_KERNEL))) {
> -               err = -ENOMEM;
> -               goto exit;
> -       }
> -
> -       client = &pcf8563->client;
> -       client->addr = address;
> -       client->driver = &pcf8563_driver;
> -       client->adapter = adapter;
> -
> -       strlcpy(client->name, pcf8563_driver.driver.name, I2C_NAME_SIZE);
> -
> -       /* Verify the chip is really an PCF8563 */
> -       if (kind < 0) {
> -               if (pcf8563_validate_client(client) < 0) {
> -                       err = -ENODEV;
> -                       goto exit_kfree;
> -               }
> -       }
> -
> -       /* Inform the i2c layer */
> -       if ((err = i2c_attach_client(client)))
> -               goto exit_kfree;
> -
> -       dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
> +       result = pcf8563_validate_client(client);
> +       if (result)
> +               return result;
>
>         rtc = rtc_device_register(pcf8563_driver.driver.name, &client->dev,
>                                 &pcf8563_rtc_ops, THIS_MODULE);
> -
> -       if (IS_ERR(rtc)) {
> -               err = PTR_ERR(rtc);
> -               goto exit_detach;
> -       }
> +       if (IS_ERR(rtc))
> +               return PTR_ERR(rtc);
>
>         i2c_set_clientdata(client, rtc);
>
>         return 0;
> -
> -exit_detach:
> -       i2c_detach_client(client);
> -
> -exit_kfree:
> -       kfree(pcf8563);
> -
> -exit:
> -       return err;
> -}
> -
> -static int pcf8563_detach(struct i2c_client *client)
> -{
> -       struct pcf8563 *pcf8563 = container_of(client, struct pcf8563, client);
> -       int err;
> -       struct rtc_device *rtc = i2c_get_clientdata(client);
> -
> -       if (rtc)
> -               rtc_device_unregister(rtc);
> -
> -       if ((err = i2c_detach_client(client)))
> -               return err;
> -
> -       kfree(pcf8563);
> -
> -       return 0;
>  }
>
>  static int __init pcf8563_init(void)
>
>
> _______________________________________________
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> i2c-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org
> http://lists.lm-sensors.org/mailman/listinfo/i2c
>


-- 
Jon Smirl
jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

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Re: [i2c] [PATCH] Convert pfc8563 i2c driver from old style to new style

[Jean Delvare]

Hi Jon,

On Fri, 25 Jan 2008 12:16:46 -0500, Jon Smirl wrote:
> Any final objections to this patch? Jean can you pick it up?

Sorry for the delay, I'll review your patch right now. Note that the
driver is really named pcf8563 not pfc8563.

-- 
Jean Delvare

Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Jean Delvare]

Hi Jon,

On Mon, 21 Jan 2008 15:09:01 -0500, Jon Smirl wrote:
> Convert pfc8563 i2c driver from old style to new style.
> 
> Signed-off-by: Jon Smirl <jonsmirl@gmail.com>
> ---
> 
>  drivers/rtc/rtc-pcf8563.c |  107 +++++++++++----------------------------------
>  1 files changed, 27 insertions(+), 80 deletions(-)

Preliminary note: this driver belongs to the RTC subsystem, so it will
be up to Alessandro Zummo (Cc'd) to push this patch upstream... when it
is ready to go there.

I am also adding Clemens Koller to Cc. Clemens, as you sent patches to
the pcf8563 driver, I guess that you are using this driver. Please let
us know on which architecture and whether the platform code was already
updated to instantiate the pcf8563 (or rtc8564) device. Right now it
seems that only two ixp4xx platforms have been updated to do so
(dsmg600 and nas100d). I am worried that the conversion to a new-style
driver could break some systems, although that should be fairly easy to
fix.

Review:

> diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
> index b3317fc..8eff549 100644
> --- a/drivers/rtc/rtc-pcf8563.c
> +++ b/drivers/rtc/rtc-pcf8563.c
> @@ -25,10 +25,6 @@
>   * located at 0x51 will pass the validation routine due to
>   * the way the registers are implemented.
>   */
> -static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
> -
> -/* Module parameters */
> -I2C_CLIENT_INSMOD;

The comment above can probably go away as well now, it no longer makes
sense without the normal_i2c declaration.

>  
>  #define PCF8563_REG_ST1		0x00 /* status */
>  #define PCF8563_REG_ST2		0x01
> @@ -72,9 +68,6 @@ struct pcf8563 {
>  	int c_polarity;	/* 0: MO_C=1 means 19xx, otherwise MO_C=1 means 20xx */
>  };
>  
> -static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind);
> -static int pcf8563_detach(struct i2c_client *client);
> -
>  /*
>   * In the routines that deal directly with the pcf8563 hardware, we use
>   * rtc_time -- month 0-11, hour 0-23, yr = calendar year-epoch.
> @@ -257,98 +250,52 @@ static const struct rtc_class_ops pcf8563_rtc_ops = {
>  	.set_time	= pcf8563_rtc_set_time,
>  };
>  
> -static int pcf8563_attach(struct i2c_adapter *adapter)
> +static int pcf8563_remove(struct i2c_client *client)
>  {
> -	return i2c_probe(adapter, &addr_data, pcf8563_probe);
> +	struct rtc_device *rtc = i2c_get_clientdata(client);
> +
> +	if (rtc)
> +		rtc_device_unregister(rtc);
> +
> +	return 0;
>  }

Moving this function where pcf8563_detach() was would result in a
smaller, more readable patch.

>  
> +static struct i2c_device_id pcf8563_id[] = {

This structure and all the surrounding infrastructure don't exist yet,
so you can't use this. This part of the code will be added later to all
the new-style i2c device drivers at once, you don't have to worry about
this.

> +	{"pcf8563", 0},
> +	{"rtc8564", 0},
> +	{},
> +};
> +MODULE_DEVICE_TABLE(i2c, pcf8563_id);
> +
> +static int pcf8563_probe(struct i2c_client *client, const struct i2c_device_id *id);
> +
>  static struct i2c_driver pcf8563_driver = {
>  	.driver		= {
> -		.name	= "pcf8563",
> +		.name	= "rtc-pcf8563",
>  	},
>  	.id		= I2C_DRIVERID_PCF8563,

It's probably the right time to get rid of I2C_DRIVERID_PCF8563 (here
and in <include/i2c-id.h>).

> -	.attach_adapter = &pcf8563_attach,
> -	.detach_client	= &pcf8563_detach,
> +	.probe = &pcf8563_probe,
> +	.remove = &pcf8563_remove,

Use tabs before the equal sign to be consistent with the rest of the
structure declaration.

> +	.id_table	= pcf8563_id,
>  };
>  
> -static int pcf8563_probe(struct i2c_adapter *adapter, int address, int kind)
> +static int pcf8563_probe(struct i2c_client *client, const struct i2c_device_id *id)
>  {
> -	struct pcf8563 *pcf8563;
> -	struct i2c_client *client;
> +	int result;
>  	struct rtc_device *rtc;
>  
> -	int err = 0;
> -
> -	dev_dbg(&adapter->dev, "%s\n", __FUNCTION__);
> -
> -	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C)) {
> -		err = -ENODEV;
> -		goto exit;
> -	}
> -
> -	if (!(pcf8563 = kzalloc(sizeof(struct pcf8563), GFP_KERNEL))) {
> -		err = -ENOMEM;
> -		goto exit;
> -	}

So you no longer allocate a struct pcf8563. How are
pcf8563_get_datetime() and pcf8563_set_datetime() supposed to work?
Both do:
	struct pcf8563 *pcf8563 = container_of(client, struct pcf8563, client);

While I agree that struct pcf8563 must no longer contain a struct
i2c_client for a new-style driver, there's still c_polarity which needs
to be carried around and handled.

You did not actually test your patch, did you?

I think that you will have to add a
	struct rtc_device *rtc;
to struct pcf8563, as you can't set the client data to both the struct
rtc_device address and the struct pcf8563 address. This is what the
pcf8583 driver does for example.

> -
> -	client = &pcf8563->client;
> -	client->addr = address;
> -	client->driver = &pcf8563_driver;
> -	client->adapter	= adapter;
> -
> -	strlcpy(client->name, pcf8563_driver.driver.name, I2C_NAME_SIZE);
> -
> -	/* Verify the chip is really an PCF8563 */
> -	if (kind < 0) {
> -		if (pcf8563_validate_client(client) < 0) {
> -			err = -ENODEV;
> -			goto exit_kfree;
> -		}
> -	}
> -
> -	/* Inform the i2c layer */
> -	if ((err = i2c_attach_client(client)))
> -		goto exit_kfree;
> -
> -	dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
> +	result = pcf8563_validate_client(client);
> +	if (result)
> +		return result;

The pcf8563_validate_client() function could probably go away for a
smaller driver and shorter initialization time. New-style i2c drivers
don't really need to detect what chip they are attaching to, they
should be able to trust the platform code.

>  
>  	rtc = rtc_device_register(pcf8563_driver.driver.name, &client->dev,
>  				&pcf8563_rtc_ops, THIS_MODULE);
> -
> -	if (IS_ERR(rtc)) {
> -		err = PTR_ERR(rtc);
> -		goto exit_detach;
> -	}
> +	if (IS_ERR(rtc))
> +		return PTR_ERR(rtc);
>  
>  	i2c_set_clientdata(client, rtc);
>  
>  	return 0;
> -
> -exit_detach:
> -	i2c_detach_client(client);
> -
> -exit_kfree:
> -	kfree(pcf8563);
> -
> -exit:
> -	return err;
> -}
> -
> -static int pcf8563_detach(struct i2c_client *client)
> -{
> -	struct pcf8563 *pcf8563 = container_of(client, struct pcf8563, client);
> -	int err;
> -	struct rtc_device *rtc = i2c_get_clientdata(client);
> -
> -	if (rtc)
> -		rtc_device_unregister(rtc);
> -
> -	if ((err = i2c_detach_client(client)))
> -		return err;
> -
> -	kfree(pcf8563);
> -
> -	return 0;
>  }
>  
>  static int __init pcf8563_init(void)

-- 
Jean Delvare

Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Jon Smirl]

On 2/19/08, Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org> wrote:
> Hi Jon,
>
> On Mon, 21 Jan 2008 15:09:01 -0500, Jon Smirl wrote:
> > Convert pfc8563 i2c driver from old style to new style.

Let's just forget about this patch until the dynamic module loading
support goes into the base.

The Phytec PCM030 mpc5200 board uses this chip. They are staying out
of tree because they've integrated real-time support which is not in
mainline yet.

-- 
Jon Smirl
jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org

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Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Jean Delvare]

On Tue, 19 Feb 2008 10:17:43 -0500, Jon Smirl wrote:
> On 2/19/08, Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org> wrote:
> > Hi Jon,
> >
> > On Mon, 21 Jan 2008 15:09:01 -0500, Jon Smirl wrote:
> > > Convert pfc8563 i2c driver from old style to new style.
> 
> Let's just forget about this patch until the dynamic module loading
> support goes into the base.

Why? I don't see the rationale. New-style drivers are good even without
dynamic module loading.

> The Phytec PCM030 mpc5200 board uses this chip. They are staying out
> of tree because they've integrated real-time support which is not in
> mainline yet.


-- 
Jean Delvare

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Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Alessandro Zummo]

On Tue, 19 Feb 2008 16:10:20 +0100
Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org> wrote:

> Hi Jon,
> 
> On Mon, 21 Jan 2008 15:09:01 -0500, Jon Smirl wrote:
> > Convert pfc8563 i2c driver from old style to new style.
> > 
> > Signed-off-by: Jon Smirl <jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > ---
> > 
> >  drivers/rtc/rtc-pcf8563.c |  107 +++++++++++----------------------------------
> >  1 files changed, 27 insertions(+), 80 deletions(-)
> 
> Preliminary note: this driver belongs to the RTC subsystem, so it will
> be up to Alessandro Zummo (Cc'd) to push this patch upstream... when it
> is ready to go there.

 A conversion to new style for this driver has already been
 pushed upstream. Adapting platforms to instantiate the device
 should be fairly easy, especially when you use the dts.

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it


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Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Jean Delvare]

On Tue, 19 Feb 2008 17:24:50 +0100, Alessandro Zummo wrote:
> On Tue, 19 Feb 2008 16:10:20 +0100
> Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org> wrote:
> 
> > Hi Jon,
> > 
> > On Mon, 21 Jan 2008 15:09:01 -0500, Jon Smirl wrote:
> > > Convert pfc8563 i2c driver from old style to new style.
> > > 
> > > Signed-off-by: Jon Smirl <jonsmirl-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > > ---
> > > 
> > >  drivers/rtc/rtc-pcf8563.c |  107 +++++++++++----------------------------------
> > >  1 files changed, 27 insertions(+), 80 deletions(-)
> > 
> > Preliminary note: this driver belongs to the RTC subsystem, so it will
> > be up to Alessandro Zummo (Cc'd) to push this patch upstream... when it
> > is ready to go there.
> 
>  A conversion to new style for this driver has already been
>  pushed upstream. Adapting platforms to instantiate the device
>  should be fairly easy, especially when you use the dts.

Ah, excellent. I didn't know, thanks for pointing it out. I'm glad I
added you to Cc :)

-- 
Jean Delvare

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Re: [PATCH] Convert pfc8563 i2c driver from old style to new style

[Alessandro Zummo]

On Tue, 19 Feb 2008 17:37:00 +0100
Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org> wrote:

> > 
> >  A conversion to new style for this driver has already been
> >  pushed upstream. Adapting platforms to instantiate the device
> >  should be fairly easy, especially when you use the dts.
> 
> Ah, excellent. I didn't know, thanks for pointing it out. I'm glad I
> added you to Cc :)

 I forgot to add you on the patch :) But I know you like those
 kind of conversions.. I have preserver the polarity field tough :)

-- 

 Best regards,

 Alessandro Zummo,
  Tower Technologies - Torino, Italy

  http://www.towertech.it


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