evie/android_kernel_oneplus_msm8998
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

qpnp-fg-gen3: Show a fake SOC and voltage when battery is missing

Browse source 
During battery hotswap, a strong charger will be supplying enough
current to keep the device up and running. Currently, FG driver
shows up the monotonic SOC and voltage as-is (which is zero) to
the battery power supply and hence to the userspace.

Show a fake battery SOC (50%) and fake battery voltage (3.7 V)
when the battery is missing. If a strong charger is not present,
then the device will be powered down anyways.

Change-Id: Ia2c85d1e75bbf0c937a7e36e786362c473c7f7cd
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2017-01-24 18:45:14 -08:00
parent 336e245503
commit 7e3256e251
1 changed files with 16 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

21
drivers/power/supply/qcom/qpnp-fg-gen3.c
View file

@ -773,6 +773,7 @@ static bool is_debug_batt_id(struct fg_chip *chip)
#define FULL_CAPACITY 100
#define FULL_SOC_RAW 255
#define DEBUG_BATT_SOC 67
#define BATT_MISS_SOC 50
#define EMPTY_SOC 0
static int fg_get_prop_capacity(struct fg_chip *chip, int *val)
{
@ -783,6 +784,16 @@ static int fg_get_prop_capacity(struct fg_chip *chip, int *val)
return 0;
}
if (chip->fg_restarting) {
*val = chip->last_soc;
return 0;
}
if (chip->battery_missing) {
*val = BATT_MISS_SOC;
return 0;
}
if (is_batt_empty(chip)) {
*val = EMPTY_SOC;
return 0;
@ -2490,13 +2501,13 @@ static int fg_psy_get_property(struct power_supply *psy,
switch (psp) {
case POWER_SUPPLY_PROP_CAPACITY:
if (chip->fg_restarting)
pval->intval = chip->last_soc;
else
rc = fg_get_prop_capacity(chip, &pval->intval);
rc = fg_get_prop_capacity(chip, &pval->intval);
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
rc = fg_get_battery_voltage(chip, &pval->intval);
if (chip->battery_missing)
pval->intval = 3700000;
else
rc = fg_get_battery_voltage(chip, &pval->intval);
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
rc = fg_get_battery_current(chip, &pval->intval);