[PATCH] w1: add ds28ec20 eeprom support

[Sascha Hauer]

On Sun, Jan 20, 2013 at 01:45:18PM +0100, Jean-Christophe PLAGNIOL-VILLARD wrote:
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj at jcrosoft.com>

Applied, thanks

Sascha

> ---
>  drivers/w1/slaves/Kconfig     |    4 ++--
>  drivers/w1/slaves/w1_ds2433.c |   43 ++++++++++++++++++++++++++++++-----------
>  2 files changed, 34 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
> index 946a0b3..19942ad 100644
> --- a/drivers/w1/slaves/Kconfig
> +++ b/drivers/w1/slaves/Kconfig
> @@ -15,10 +15,10 @@ config W1_SLAVE_DS2431_WRITE
>  	depends on W1_SLAVE_DS2431
>  
>  config W1_SLAVE_DS2433
> -	bool "4kb EEPROM family support (DS2433)"
> +	bool "EEPROM family support (DS2433 4Kb or DS28EC20 20kb)"
>  	help
>  	  Say Y here if you want to use a 1-wire
> -	  4kb EEPROM family device (DS2433).
> +	  EEPROM family device (DS2433 4Kb or DS28EC20 20kb).
>  
>  config W1_SLAVE_DS2433_WRITE
>  	bool "write support"
> diff --git a/drivers/w1/slaves/w1_ds2433.c b/drivers/w1/slaves/w1_ds2433.c
> index 51279fb..a840d9a 100644
> --- a/drivers/w1/slaves/w1_ds2433.c
> +++ b/drivers/w1/slaves/w1_ds2433.c
> @@ -10,8 +10,6 @@
>  #include <init.h>
>  #include "../w1.h"
>  
> -#define W1_EEPROM_SIZE		512
> -#define W1_PAGE_COUNT		16
>  #define W1_PAGE_SIZE		32
>  #define W1_PAGE_BITS		5
>  #define W1_PAGE_MASK		0x1F
> @@ -23,9 +21,8 @@
>  #define W1_F23_READ_SCRATCH	0xAA
>  #define W1_F23_COPY_SCRATCH	0x55
>  
> -#define DRIVERNAME	"ds2433"
> -
>  static int ds2433_count = 0;
> +static int ds28ec20_count = 0;
>  
>  /**
>   * Check the file size bounds and adjusts count as needed.
> @@ -49,7 +46,7 @@ static ssize_t ds2433_cdev_read(struct cdev *cdev, void *buf, size_t count,
>  	struct w1_bus *bus = dev->bus;
>  	u8 wrbuf[3];
>  
> -	if ((count = ds2433_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
> +	if ((count = ds2433_fix_count(off, count, cdev->size)) == 0)
>  		return 0;
>  
>  	/* read directly from the EEPROM */
> @@ -134,7 +131,7 @@ static ssize_t ds2433_cdev_write(struct cdev *cdev, const void *buf, size_t coun
>  	int addr, len, idx;
>  	const u8 *buf8 = buf;
>  
> -	if ((count = ds2433_fix_count(off, count, W1_EEPROM_SIZE)) == 0)
> +	if ((count = ds2433_fix_count(off, count, cdev->size)) == 0)
>  		return 0;
>  
>  	/* Can only write data to one page at a time */
> @@ -165,7 +162,7 @@ static struct file_operations ds2433_ops = {
>  	.lseek	= dev_lseek_default,
>  };
>  
> -static int ds2433_probe(struct w1_device *dev)
> +static int ds2433_cdev_create(struct w1_device *dev, int size, int id)
>  {
>  	struct cdev *cdev;
>  
> @@ -173,24 +170,48 @@ static int ds2433_probe(struct w1_device *dev)
>  	cdev->dev	= &dev->dev;
>  	cdev->priv	= dev;
>  	cdev->ops	= &ds2433_ops;
> -	cdev->size	= W1_EEPROM_SIZE;
> -	cdev->name	= asprintf(DRIVERNAME"%d", ds2433_count++);
> +	cdev->size	= size;
> +	cdev->name	= asprintf("%s%d", dev->dev.driver->name, id);
>  	if (cdev->name == NULL)
>  		return -ENOMEM;
>  
>  	return devfs_create(cdev);
>  }
>  
> +static int ds2433_probe(struct w1_device *dev)
> +{
> +	return ds2433_cdev_create(dev, 512, ds2433_count++);
> +}
> +
> +static int ds28ec20_probe(struct w1_device *dev)
> +{
> +	return ds2433_cdev_create(dev, 2560, ds28ec20_count++);
> +}
> +
>  struct w1_driver ds2433_driver = {
>  	.drv = {
> -		.name = DRIVERNAME,
> +		.name = "ds2433",
>  	},
>  	.probe		= ds2433_probe,
>  	.fid		= 0x23,
>  };
>  
> +struct w1_driver ds28ec20_driver = {
> +	.drv = {
> +		.name = "ds28ec20",
> +	},
> +	.probe		= ds28ec20_probe,
> +	.fid		= 0x43,
> +};
> +
>  static int w1_ds2433_init(void)
>  {
> -	return w1_driver_register(&ds2433_driver);
> +	int ret;
> +
> +	ret = w1_driver_register(&ds2433_driver);
> +	if (ret)
> +		return ret;
> +
> +	return w1_driver_register(&ds28ec20_driver);
>  }
>  device_initcall(w1_ds2433_init);
> -- 
> 1.7.10.4
> 
> 
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