linux-kernel - Re: [PATCH 2/3] w1: ds2760: add support for EEPROM read and write

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Message-ID: <20090428150109.GA14209@oksana.dev.rtsoft.ru>
Date:	Tue, 28 Apr 2009 19:01:09 +0400
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Evgeniy Polyakov <zbr@...emap.net>, Daniel Mack <daniel@...aq.de>
Cc:	linux-kernel@...r.kernel.org,
	Szabolcs Gyurko <szabolcs.gyurko@....hu>,
	Matt Reimer <mreimer@...p.net>, Anton Vorontsov <cbou@...l.ru>
Subject: Re: [PATCH 2/3] w1: ds2760: add support for EEPROM read and write

On Tue, Apr 28, 2009 at 10:55:01AM +0200, Daniel Mack wrote:
> In order to modify the DS2762's status registers and to add support for
> sleep mode, there is need for functions to write the internal EEPROM.
> 
> Cc: Szabolcs Gyurko <szabolcs.gyurko@....hu>
> Cc: Matt Reimer <mreimer@...p.net>
> Cc: Anton Vorontsov <cbou@...l.ru>
> Signed-off-by: Daniel Mack <daniel@...aq.de>
> ---

Evgeniy, don't mind if I take it via battery-2.6.git tree?

>  drivers/w1/slaves/w1_ds2760.c |   28 ++++++++++++++++++++++++++++
>  drivers/w1/slaves/w1_ds2760.h |    2 ++
>  2 files changed, 30 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/w1/slaves/w1_ds2760.c b/drivers/w1/slaves/w1_ds2760.c
> index 1f09d4e..5ad7a0b 100644
> --- a/drivers/w1/slaves/w1_ds2760.c
> +++ b/drivers/w1/slaves/w1_ds2760.c
> @@ -68,6 +68,34 @@ int w1_ds2760_write(struct device *dev, char *buf, int addr, size_t count)
>  	return w1_ds2760_io(dev, buf, addr, count, 1);
>  }
>  
> +static int w1_ds2760_eeprom_cmd(struct device *dev, int addr, int cmd)
> +{
> +	struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
> +
> +	if (!dev)
> +		return -EINVAL;
> +
> +	mutex_lock(&sl->master->mutex);
> +
> +	if (w1_reset_select_slave(sl) == 0) {
> +		w1_write_8(sl->master, cmd);
> +		w1_write_8(sl->master, addr);
> +	}
> +
> +	mutex_unlock(&sl->master->mutex);
> +	return 0;
> +}
> +
> +int w1_ds2760_store_eeprom(struct device *dev, int addr)
> +{
> +	return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_COPY_DATA);
> +}
> +
> +int w1_ds2760_recall_eeprom(struct device *dev, int addr)
> +{
> +	return w1_ds2760_eeprom_cmd(dev, addr, W1_DS2760_RECALL_DATA);
> +}
> +
>  static ssize_t w1_ds2760_read_bin(struct kobject *kobj,
>  				  struct bin_attribute *bin_attr,
>  				  char *buf, loff_t off, size_t count)
> diff --git a/drivers/w1/slaves/w1_ds2760.h b/drivers/w1/slaves/w1_ds2760.h
> index f130242..ea39419 100644
> --- a/drivers/w1/slaves/w1_ds2760.h
> +++ b/drivers/w1/slaves/w1_ds2760.h
> @@ -46,5 +46,7 @@ extern int w1_ds2760_read(struct device *dev, char *buf, int addr,
>  			  size_t count);
>  extern int w1_ds2760_write(struct device *dev, char *buf, int addr,
>  			   size_t count);
> +extern int w1_ds2760_store_eeprom(struct device *dev, int addr);
> +extern int w1_ds2760_recall_eeprom(struct device *dev, int addr);
>  
>  #endif /* !__w1_ds2760_h__ */
> -- 
> 1.6.2.1
> 

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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