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power: supply: cpcap-battery: Keep track of state for capacity reporting

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Save the battery empty and full states so we can use those to estimate
the battery capacity in the following patches.

If the user provides us with charge_full value (which it could save in a
permanent storage between reboots), initialize low and high counter_uah
with calculated values.

If we hit battery low once, we should stick on reporting it until the
charger is connected. This way low->counter_uah will be updated
properly, and that will allow us to get more accurate charge_full value.

Based on an earlier patch by Tony Lindgren with charge_full usage and
other improvments done by Arthur Demchenkov.

Cc: Arthur Demchenkov <spinal.by@gmail.com>
Cc: Carl Philipp Klemm <philipp@uvos.xyz>
Cc: Merlijn Wajer <merlijn@wizzup.org>
Cc: Pavel Machek <pavel@ucw.cz>
Co-developed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Arthur Demchenkov <spinal.by@gmail.com>
[tony@atomide.com: combined earlier patches, updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Arthur Demchenkov 2021-01-10 21:54:00 +02:00 committed by Sebastian Reichel
parent 4fb0357c6d
commit faf6e90081
1 changed files with 55 additions and 1 deletions
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56
drivers/power/supply/cpcap-battery.c
View File

@ -111,6 +111,8 @@ struct cpcap_coulomb_counter_data {
enum cpcap_battery_state {
CPCAP_BATTERY_STATE_PREVIOUS,
CPCAP_BATTERY_STATE_LATEST,
CPCAP_BATTERY_STATE_EMPTY,
CPCAP_BATTERY_STATE_FULL,
CPCAP_BATTERY_STATE_NR,
};
@ -166,6 +168,18 @@ cpcap_battery_previous(struct cpcap_battery_ddata *ddata)
return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_PREVIOUS);
}
static struct cpcap_battery_state_data *
cpcap_battery_get_empty(struct cpcap_battery_ddata *ddata)
{
return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_EMPTY);
}
static struct cpcap_battery_state_data *
cpcap_battery_get_full(struct cpcap_battery_ddata *ddata)
{
return cpcap_battery_get_state(ddata, CPCAP_BATTERY_STATE_FULL);
}
static int cpcap_charger_battery_temperature(struct cpcap_battery_ddata *ddata,
int *value)
{
@ -431,9 +445,23 @@ static bool cpcap_battery_full(struct cpcap_battery_ddata *ddata)
return ddata->is_full;
}
static bool cpcap_battery_low(struct cpcap_battery_ddata *ddata)
{
struct cpcap_battery_state_data *state = cpcap_battery_latest(ddata);
static bool is_low;
if (state->current_ua > 0 && (state->voltage <= 3350000 || is_low))
is_low = true;
else
is_low = false;
return is_low;
}
static int cpcap_battery_update_status(struct cpcap_battery_ddata *ddata)
{
struct cpcap_battery_state_data state, *latest, *previous;
struct cpcap_battery_state_data state, *latest, *previous,
*empty, *full;
ktime_t now;
int error;
@ -462,6 +490,32 @@ static int cpcap_battery_update_status(struct cpcap_battery_ddata *ddata)
memcpy(previous, latest, sizeof(*previous));
memcpy(latest, &state, sizeof(*latest));
if (cpcap_battery_full(ddata)) {
full = cpcap_battery_get_full(ddata);
memcpy(full, latest, sizeof(*full));
empty = cpcap_battery_get_empty(ddata);
if (empty->voltage && empty->voltage != -1) {
empty->voltage = -1;
ddata->charge_full =
empty->counter_uah - full->counter_uah;
} else if (ddata->charge_full) {
empty->voltage = -1;
empty->counter_uah =
full->counter_uah + ddata->charge_full;
}
} else if (cpcap_battery_low(ddata)) {
empty = cpcap_battery_get_empty(ddata);
memcpy(empty, latest, sizeof(*empty));
full = cpcap_battery_get_full(ddata);
if (full->voltage) {
full->voltage = 0;
ddata->charge_full =
empty->counter_uah - full->counter_uah;
}
}
return 0;
}