power: pm8921-charger: Use ccadc api's
When BMS is not configured the charger needs to get the current
from the ccadc. Also it needs to calculate state of charge based on
the voltage.
Change-Id: I501253f1d16f970ec4ade0a3f4ad90198b410f3d
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
diff --git a/drivers/power/pm8921-charger.c b/drivers/power/pm8921-charger.c
index af44f45..e517146 100644
--- a/drivers/power/pm8921-charger.c
+++ b/drivers/power/pm8921-charger.c
@@ -19,6 +19,7 @@
#include <linux/mfd/pm8xxx/pm8921-charger.h>
#include <linux/mfd/pm8xxx/pm8921-bms.h>
#include <linux/mfd/pm8xxx/pm8921-adc.h>
+#include <linux/mfd/pm8xxx/ccadc.h>
#include <linux/mfd/pm8xxx/core.h>
#include <linux/interrupt.h>
#include <linux/power_supply.h>
@@ -937,10 +938,28 @@
return (int)result.physical;
}
+static unsigned int voltage_based_capacity(struct pm8921_chg_chip *chip)
+{
+ unsigned int current_voltage = get_prop_battery_mvolts(chip);
+ unsigned int low_voltage = chip->min_voltage;
+ unsigned int high_voltage = chip->max_voltage;
+
+ if (current_voltage <= low_voltage)
+ return 0;
+ else if (current_voltage >= high_voltage)
+ return 100;
+ else
+ return (current_voltage - low_voltage) * 100
+ / (high_voltage - low_voltage);
+}
+
static int get_prop_batt_capacity(struct pm8921_chg_chip *chip)
{
int percent_soc = pm8921_bms_get_percent_charge();
+ if (percent_soc == -ENXIO)
+ percent_soc = voltage_based_capacity(chip);
+
if (percent_soc <= 10)
pr_warn("low battery charge = %d%%\n", percent_soc);
@@ -952,6 +971,10 @@
int result_ma, rc;
rc = pm8921_bms_get_battery_current(&result_ma);
+ if (rc == -ENXIO) {
+ rc = pm8xxx_ccadc_get_battery_current(&result_ma);
+ }
+
if (rc) {
pr_err("unable to get batt current rc = %d\n", rc);
return rc;