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ds2760_battery: Make charge_now and charge_full writeable

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For userspace tools and daemons, it might be necessary to adjust
the charge_now and charge_full properties of the ds2760 battery monitor,
for example for unavoidable corrections due to aging batteries.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Matt Reimer <mreimer@vpop.net>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Cc: Tejun Heo <tj@kernel.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Alexey Starikovskiy <astarikovskiy@suse.de>
Cc: Len Brown <len.brown@intel.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Daniel Mack 2010-05-18 21:49:53 +02:00 committed by Anton Vorontsov
parent 0011d2d4a5
commit bd52ca555e
1 changed files with 64 additions and 0 deletions
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64
drivers/power/ds2760_battery.c
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@ -304,6 +304,28 @@ static void ds2760_battery_write_rated_capacity(struct ds2760_device_info *di,
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK1);
}
static void ds2760_battery_write_active_full(struct ds2760_device_info *di,
int active_full)
{
unsigned char tmp[2] = {
active_full >> 8,
active_full & 0xff
};
if (tmp[0] == di->raw[DS2760_ACTIVE_FULL] &&
tmp[1] == di->raw[DS2760_ACTIVE_FULL + 1])
return;
w1_ds2760_write(di->w1_dev, tmp, DS2760_ACTIVE_FULL, sizeof(tmp));
w1_ds2760_store_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK0);
w1_ds2760_recall_eeprom(di->w1_dev, DS2760_EEPROM_BLOCK0);
/* Write to the di->raw[] buffer directly - the DS2760_ACTIVE_FULL
* values won't be read back by ds2760_battery_read_status() */
di->raw[DS2760_ACTIVE_FULL] = tmp[0];
di->raw[DS2760_ACTIVE_FULL + 1] = tmp[1];
}
static void ds2760_battery_work(struct work_struct *work)
{
struct ds2760_device_info *di = container_of(work,
@ -426,6 +448,45 @@ static int ds2760_battery_get_property(struct power_supply *psy,
return 0;
}
static int ds2760_battery_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct ds2760_device_info *di = to_ds2760_device_info(psy);
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
/* the interface counts in uAh, convert the value */
ds2760_battery_write_active_full(di, val->intval / 1000L);
break;
case POWER_SUPPLY_PROP_CHARGE_NOW:
/* ds2760_battery_set_current_accum() does the conversion */
ds2760_battery_set_current_accum(di, val->intval);
break;
default:
return -EPERM;
}
return 0;
}
static int ds2760_battery_property_is_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
switch (psp) {
case POWER_SUPPLY_PROP_CHARGE_FULL:
case POWER_SUPPLY_PROP_CHARGE_NOW:
return 1;
default:
break;
}
return 0;
}
static enum power_supply_property ds2760_battery_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
@ -460,6 +521,9 @@ static int ds2760_battery_probe(struct platform_device *pdev)
di->bat.properties = ds2760_battery_props;
di->bat.num_properties = ARRAY_SIZE(ds2760_battery_props);
di->bat.get_property = ds2760_battery_get_property;
di->bat.set_property = ds2760_battery_set_property;
di->bat.property_is_writeable =
ds2760_battery_property_is_writeable;
di->bat.set_charged = ds2760_battery_set_charged;
di->bat.external_power_changed =
ds2760_battery_external_power_changed;