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

Anton Vorontsov
2009-04-28T15:01:26Z

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@tlt.hu>
> Cc: Matt Reimer <mreimer@vpop.net>
> Cc: Anton Vorontsov <cbou@mail.ru>
> Signed-off-by: Daniel Mack <daniel@caiaq.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@gmail.com
irc://irc.freenode.net/bd2