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power: supply: qti_battery_charger: add support to set fake SOC for battery

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Setting a fake battery SOC (state of charge) is useful to test
different mitigation levels. Add support for it by exposing
fake_soc under qcom-battery class which can be set only when
CONFIG_QTI_PMIC_GLINK_CLIENT_DEBUG is enabled.

To set fake_soc of 50%,

 echo 50 > /sys/class/qcom-battery/fake_soc

To clear fake_soc so that actual battery SOC can be displayed,
any value other than 0-100 can be set to fake_soc.

 echo -1 > /sys/class/qcom-battery/fake_soc

Change-Id: Ibff337fb4da9d4e9aadbe148f3eecca9e2d69604
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2020-03-13 12:02:27 -07:00
commit 2a9286f089
1 changed files with 32 additions and 0 deletions
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32
drivers/power/supply/qti_battery_charger.c
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@ -150,6 +150,7 @@ struct battery_chg_dev {
int num_thermal_levels;
atomic_t state;
struct work_struct subsys_up_work;
int fake_soc;
};
static const int battery_prop_map[BATT_PROP_MAX] = {
@ -722,6 +723,9 @@ static int battery_psy_get_prop(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_CAPACITY:
pval->intval = DIV_ROUND_CLOSEST(pst->prop[prop_id], 100);
if (IS_ENABLED(CONFIG_QTI_PMIC_GLINK_CLIENT_DEBUG) &&
(bcdev->fake_soc >= 0 && bcdev->fake_soc <= 100))
pval->intval = bcdev->fake_soc;
break;
case POWER_SUPPLY_PROP_TEMP:
pval->intval = DIV_ROUND_CLOSEST((int)pst->prop[prop_id], 10);
@ -839,6 +843,32 @@ static int battery_chg_init_psy(struct battery_chg_dev *bcdev)
return 0;
}
static ssize_t fake_soc_store(struct class *c, struct class_attribute *attr,
const char *buf, size_t count)
{
struct battery_chg_dev *bcdev = container_of(c, struct battery_chg_dev,
battery_class);
int val;
if (kstrtoint(buf, 0, &val))
return -EINVAL;
bcdev->fake_soc = val;
pr_debug("Set fake soc to %d\n", val);
return count;
}
static ssize_t fake_soc_show(struct class *c, struct class_attribute *attr,
char *buf)
{
struct battery_chg_dev *bcdev = container_of(c, struct battery_chg_dev,
battery_class);
return scnprintf(buf, PAGE_SIZE, "%d\n", bcdev->fake_soc);
}
static CLASS_ATTR_RW(fake_soc);
static ssize_t wireless_boost_en_store(struct class *c,
struct class_attribute *attr,
const char *buf, size_t count)
@ -967,6 +997,7 @@ static struct attribute *battery_class_attrs[] = {
&class_attr_moisture_detection_status.attr,
&class_attr_moisture_detection_en.attr,
&class_attr_wireless_boost_en.attr,
&class_attr_fake_soc.attr,
NULL,
};
ATTRIBUTE_GROUPS(battery_class);
@ -1081,6 +1112,7 @@ static int battery_chg_probe(struct platform_device *pdev)
goto error;
platform_set_drvdata(pdev, bcdev);
bcdev->fake_soc = -EINVAL;
rc = battery_chg_init_psy(bcdev);
if (rc < 0)
goto error;