linux-kernel - Re: [PATCH 1/2] power_supply: get_by_name and set

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Message-ID: <4A70249C.6060705@f2s.com>
Date:	Wed, 29 Jul 2009 11:29:48 +0100
From:	Ian molton <spyro@....com>
To:	Daniel Mack <daniel@...aq.de>
CC:	linux-kernel@...r.kernel.org, Anton Vorontsov <cbou@...l.ru>,
	Matt Reimer <mreimer@...p.net>
Subject: Re: [PATCH 1/2] power_supply: get_by_name and set_charged	functionality

Daniel Mack wrote:
> ping?

Looks ok. the only comment I have right now is that the comment doesnt 
quite match the patch - it suggests that the patch doesnt include the 
power_supply_set_battery_charged() function, when it does in fact.

> 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@...aq.de>
>> Cc: Ian Molton <spyro@....com>
>> Cc: Anton Vorontsov <cbou@...l.ru>
>> Cc: Matt Reimer <mreimer@...p.net>
>> ---
>>  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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