Re: [PATCH 1/2] power_supply: get_by_name and set_chargedfunctionality

From: Daniel Mack
Date: Tue Jul 28 2009 - 18:06:49 EST


ping?

On Thu, Jul 23, 2009 at 08:35:53PM +0200, Daniel Mack wrote:
> This adds a function to get a power_supply device from the class of
> registered devices by name reference. It can be used to find a specific
> battery to call power_supply_set_battery_charged() on.
>
> Some battery drivers might need that information to calibrate
> themselves.
>
> Signed-off-by: Daniel Mack <daniel@xxxxxxxx>
> Cc: Ian Molton <spyro@xxxxxxx>
> Cc: Anton Vorontsov <cbou@xxxxxxx>
> Cc: Matt Reimer <mreimer@xxxxxxxx>
> ---
> drivers/power/power_supply_core.c | 28 ++++++++++++++++++++++++++++
> include/linux/power_supply.h | 3 +++
> 2 files changed, 31 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
> index 58f10ac..ddb4800 100644
> --- a/drivers/power/power_supply_core.c
> +++ b/drivers/power/power_supply_core.c
> @@ -117,6 +117,34 @@ int power_supply_is_system_supplied(void)
> }
> EXPORT_SYMBOL_GPL(power_supply_is_system_supplied);
>
> +int power_supply_set_battery_charged(struct power_supply *psy)
> +{
> + if (psy->type == POWER_SUPPLY_TYPE_BATTERY && psy->set_charged) {
> + psy->set_charged(psy);
> + return 0;
> + }
> +
> + return -EINVAL;
> +}
> +EXPORT_SYMBOL_GPL(power_supply_set_battery_charged);
> +
> +static int power_supply_match_device_by_name(struct device *dev, void *data)
> +{
> + const char *name = data;
> + struct power_supply *psy = dev_get_drvdata(dev);
> +
> + return strcmp(psy->name, name) == 0;
> +}
> +
> +struct power_supply *power_supply_get_by_name(char *name)
> +{
> + struct device *dev = class_find_device(power_supply_class, NULL, name,
> + power_supply_match_device_by_name);
> +
> + return dev ? dev_get_drvdata(dev) : NULL;
> +}
> +EXPORT_SYMBOL_GPL(power_supply_get_by_name);
> +
> int power_supply_register(struct device *parent, struct power_supply *psy)
> {
> int rc = 0;
> diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
> index 594c494..49f3296 100644
> --- a/include/linux/power_supply.h
> +++ b/include/linux/power_supply.h
> @@ -126,6 +126,7 @@ struct power_supply {
> enum power_supply_property psp,
> union power_supply_propval *val);
> void (*external_power_changed)(struct power_supply *psy);
> + void (*set_charged)(struct power_supply *psy);
>
> /* For APM emulation, think legacy userspace. */
> int use_for_apm;
> @@ -165,8 +166,10 @@ struct power_supply_info {
> int use_for_apm;
> };
>
> +extern struct power_supply *power_supply_get_by_name(char *name);
> extern void power_supply_changed(struct power_supply *psy);
> extern int power_supply_am_i_supplied(struct power_supply *psy);
> +extern int power_supply_set_battery_charged(struct power_supply *psy);
>
> #if defined(CONFIG_POWER_SUPPLY) || defined(CONFIG_POWER_SUPPLY_MODULE)
> extern int power_supply_is_system_supplied(void);
> --
> 1.6.3.1
>
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