power_supply: Add voltage_ocv property and use it for max17042 driver
This adds a new sysfs file called 'voltage_ocv' which gives the Open Circuit Voltage of the battery. This property can be used for platform shutdown policies and can be useful for initial capacity estimations. Note: This patch is generated against linux-next branch. Signed-off-by: Ramakrishna Pallala <ramakrishna.pallala@intel.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
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@ -84,6 +84,8 @@ are already charged or discharging, 'n/a' can be displayed (or
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HEALTH - represents health of the battery, values corresponds to
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POWER_SUPPLY_HEALTH_*, defined in battery.h.
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VOLTAGE_OCV - open circuit voltage of the battery.
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VOLTAGE_MAX_DESIGN, VOLTAGE_MIN_DESIGN - design values for maximal and
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minimal power supply voltages. Maximal/minimal means values of voltages
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when battery considered "full"/"empty" at normal conditions. Yes, there is
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@ -106,6 +106,7 @@ static enum power_supply_property max17042_battery_props[] = {
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_AVG,
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POWER_SUPPLY_PROP_VOLTAGE_OCV,
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POWER_SUPPLY_PROP_CAPACITY,
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POWER_SUPPLY_PROP_CHARGE_FULL,
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POWER_SUPPLY_PROP_TEMP,
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@ -170,6 +171,13 @@ static int max17042_get_property(struct power_supply *psy,
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if (ret < 0)
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return ret;
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val->intval = ret * 625 / 8;
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break;
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case POWER_SUPPLY_PROP_VOLTAGE_OCV:
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ret = max17042_read_reg(chip->client, MAX17042_OCVInternal);
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if (ret < 0)
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return ret;
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val->intval = ret * 625 / 8;
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break;
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case POWER_SUPPLY_PROP_CAPACITY:
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@ -146,6 +146,7 @@ static struct device_attribute power_supply_attrs[] = {
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POWER_SUPPLY_ATTR(voltage_min_design),
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POWER_SUPPLY_ATTR(voltage_now),
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POWER_SUPPLY_ATTR(voltage_avg),
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POWER_SUPPLY_ATTR(voltage_ocv),
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POWER_SUPPLY_ATTR(current_max),
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POWER_SUPPLY_ATTR(current_now),
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POWER_SUPPLY_ATTR(current_avg),
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@ -96,6 +96,7 @@ enum power_supply_property {
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POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
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POWER_SUPPLY_PROP_VOLTAGE_NOW,
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POWER_SUPPLY_PROP_VOLTAGE_AVG,
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POWER_SUPPLY_PROP_VOLTAGE_OCV,
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POWER_SUPPLY_PROP_CURRENT_MAX,
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POWER_SUPPLY_PROP_CURRENT_NOW,
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POWER_SUPPLY_PROP_CURRENT_AVG,
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@ -261,6 +262,7 @@ static inline bool power_supply_is_watt_property(enum power_supply_property psp)
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case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
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case POWER_SUPPLY_PROP_VOLTAGE_NOW:
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case POWER_SUPPLY_PROP_VOLTAGE_AVG:
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case POWER_SUPPLY_PROP_VOLTAGE_OCV:
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case POWER_SUPPLY_PROP_POWER_NOW:
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return 1;
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default:
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