max1720x_battery: support for fade rate
keep the definition of the history data within the gauge driver.
Requires google_battery to export GBMS_TAG_HCNT.
Bug: 223759710
Signed-off-by: AleX Pelosi <[email protected]>
Change-Id: Ia02e5edd994f59df778f652ab8ab52ca1eeacf56
diff --git a/max1720x_battery.c b/max1720x_battery.c
index b7997d1..e44e252 100644
--- a/max1720x_battery.c
+++ b/max1720x_battery.c
@@ -2005,6 +2005,37 @@
return (timerh * 32) / 10;
}
+static int max1720x_get_fade_rate(struct max1720x_chip *chip)
+{
+ const int fcn_count = 10;
+ struct max17x0x_eeprom_history hist = { 0 };
+ int idx, i, ret, fcn_sum = 0;
+ u16 hist_idx;
+
+ ret = gbms_storage_read(GBMS_TAG_HCNT, &hist_idx, sizeof(hist_idx));
+ if (ret < 0) {
+ pr_err("failed to get history index (%d)\n", ret);
+ return -EIO;
+ }
+
+ idx = hist_idx - fcn_count + 1;
+ if (hist_idx < 0 || idx < 0)
+ return -ENODATA;
+
+ for (i = 0; i < fcn_count; i++, idx++) {
+ const int cnt = gbms_storage_read_data(GBMS_TAG_HIST, &hist,
+ sizeof(hist), idx);
+ if (cnt <= 0 || hist.fullcapnom == 0x3FF)
+ return -EINVAL;
+
+ fcn_sum += hist.fullcapnom;
+ }
+
+ /* convert hist.fullcapnom from max17x0x_eeprom_history to percent */
+ return fcn_sum / (fcn_count * 8);
+}
+
+
static int max1720x_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
@@ -2207,9 +2238,12 @@
case GBMS_PROP_BATTERY_AGE:
val->intval = max1720x_get_age(chip);
break;
- case GBMS_PROP_CAPACITY_AVG:
+ case GBMS_PROP_CHARGE_FULL_ESTIMATE:
val->intval = batt_ce_full_estimate(&chip->cap_estimate);
break;
+ case GBMS_PROP_CAPACITY_FADE_RATE:
+ val->intval = max1720x_get_fade_rate(chip);
+ break;
default:
err = -EINVAL;
break;
