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power: supply: sc27xx: Add one property to read charge voltage

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Add POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE property to get charge
voltage sampling by ADC controller, which is used to validate if the
charge voltage is in normal range or not in charger manager.

Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Baolin Wang 2019-01-15 18:32:35 +08:00 committed by Sebastian Reichel
parent 257afa58e6
commit 0a4f97a171
1 changed files with 29 additions and 0 deletions
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29
drivers/power/supply/sc27xx_fuel_gauge.c
View file

@ -72,6 +72,7 @@
* @lock: protect the structure
* @gpiod: GPIO for battery detection
* @channel: IIO channel to get battery temperature
* @charge_chan: IIO channel to get charge voltage
* @internal_resist: the battery internal resistance in mOhm
* @total_cap: the total capacity of the battery in mAh
* @init_cap: the initial capacity of the battery in mAh
@ -92,6 +93,7 @@ struct sc27xx_fgu_data {
struct mutex lock;
struct gpio_desc *gpiod;
struct iio_channel *channel;
struct iio_channel *charge_chan;
bool bat_present;
int internal_resist;
int total_cap;
@ -391,6 +393,18 @@ static int sc27xx_fgu_get_vbat_ocv(struct sc27xx_fgu_data *data, int *val)
return 0;
}
static int sc27xx_fgu_get_charge_vol(struct sc27xx_fgu_data *data, int *val)
{
int ret, vol;
ret = iio_read_channel_processed(data->charge_chan, &vol);
if (ret < 0)
return ret;
*val = vol * 1000;
return 0;
}
static int sc27xx_fgu_get_temp(struct sc27xx_fgu_data *data, int *temp)
{
return iio_read_channel_processed(data->channel, temp);
@ -502,6 +516,14 @@ static int sc27xx_fgu_get_property(struct power_supply *psy,
val->intval = value;
break;
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
ret = sc27xx_fgu_get_charge_vol(data, &value);
if (ret)
goto error;
val->intval = value;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_CURRENT_AVG:
ret = sc27xx_fgu_get_current(data, &value);
@ -567,6 +589,7 @@ static enum power_supply_property sc27xx_fgu_props[] = {
POWER_SUPPLY_PROP_VOLTAGE_OCV,
POWER_SUPPLY_PROP_CURRENT_NOW,
POWER_SUPPLY_PROP_CURRENT_AVG,
POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
};
static const struct power_supply_desc sc27xx_fgu_desc = {
@ -907,6 +930,12 @@ static int sc27xx_fgu_probe(struct platform_device *pdev)
return PTR_ERR(data->channel);
}
data->charge_chan = devm_iio_channel_get(&pdev->dev, "charge-vol");
if (IS_ERR(data->charge_chan)) {
dev_err(&pdev->dev, "failed to get charge IIO channel\n");
return PTR_ERR(data->charge_chan);
}
data->gpiod = devm_gpiod_get(&pdev->dev, "bat-detect", GPIOD_IN);
if (IS_ERR(data->gpiod)) {
dev_err(&pdev->dev, "failed to get battery detection GPIO\n");