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Commit 408a908b authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
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power: qpnp-fg: Support configuring battery soc via charge_full property 



Add support for POWER_SUPPLY_PROP_CHARGE_FULL property in fuel gauge
so that the charger can implement the workaround to prevent the
internal representation of battery soc from reaching 100% so that the
pulse is not prevented.

CRs-Fixed: 745467
Change-Id: If0fc441bec4876e099b5e5ce56cdd722d92b3466
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent e94ba28a

drivers/power/qpnp-fg.c

+76 −0
Original line number Diff line number Diff line
@@ -811,6 +811,71 @@ close_time: 
	return rc;

}



#define COUNTER_IMPTR_REG	0X558

#define COUNTER_PULSE_REG	0X55C

#define SOC_FULL_REG		0x564

#define BATTERY_SOC_REG		0x56C

#define COUNTER_IMPTR_OFFSET	2

#define COUNTER_PULSE_OFFSET	0

#define SOC_FULL_OFFSET		3

#define BATTERY_SOC_OFFSET	1

#define ESR_PULSE_RECONFIG_SOC	0x7FDF3B



static int fg_configure_soc(struct fg_chip *chip)

{

	u32 batt_soc;

	u8 reg[3], cntr[2] = {0, 0};

	int rc = 0;



	mutex_lock(&chip->rw_lock);

	atomic_add_return(1, &chip->memif_user_cnt);

	mutex_unlock(&chip->rw_lock);



	/* Read Battery SOC */

	rc = fg_mem_read(chip, reg, BATTERY_SOC_REG, 3, BATTERY_SOC_OFFSET, 1);

	if (rc) {

		pr_err("Failed to read battery soc\n");

		goto out;

	}



	batt_soc = reg[0] | reg[1] << 8 | reg[2] << 16;



	if (batt_soc > ESR_PULSE_RECONFIG_SOC) {

		if (fg_debug_mask & FG_POWER_SUPPLY)

			pr_info("Configuring soc registers batt_soc: %x\n",

				batt_soc);

		batt_soc = ESR_PULSE_RECONFIG_SOC;

		rc = fg_mem_write(chip, (u8 *)&batt_soc, BATTERY_SOC_REG, 3,

				BATTERY_SOC_OFFSET, 1);

		if (rc) {

			pr_err("failed to write BATT_SOC rc=%d\n", rc);

			goto out;

		}



		rc = fg_mem_write(chip, (u8 *)&batt_soc, SOC_FULL_REG, 3,

				SOC_FULL_OFFSET, 1);

		if (rc) {

			pr_err("failed to write SOC_FULL rc=%d\n", rc);

			goto out;

		}



		rc = fg_mem_write(chip, cntr, COUNTER_IMPTR_REG, 2,

				COUNTER_IMPTR_OFFSET, 1);

		if (rc) {

			pr_err("failed to write COUNTER_IMPTR rc=%d\n", rc);

			goto out;

		}



		rc = fg_mem_write(chip, cntr, COUNTER_PULSE_REG, 2,

				COUNTER_PULSE_OFFSET, 0);

		if (rc)

			pr_err("failed to write COUNTER_IMPTR rc=%d\n", rc);

	}

out:

	fg_release_access_if_necessary(chip);

	return rc;

}



#define DEFAULT_CAPACITY 50

#define MISSING_CAPACITY 100

static int get_prop_capacity(struct fg_chip *chip)
@@ -1221,6 +1286,7 @@ static enum power_supply_property fg_power_props[] = { 
	POWER_SUPPLY_PROP_RESISTANCE_ID,

	POWER_SUPPLY_PROP_BATTERY_TYPE,

	POWER_SUPPLY_PROP_UPDATE_NOW,

	POWER_SUPPLY_PROP_CHARGE_FULL,

};



static int fg_power_get_property(struct power_supply *psy,
@@ -1266,6 +1332,12 @@ static int fg_power_get_property(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_UPDATE_NOW:

		val->intval = 0;

		break;

	case POWER_SUPPLY_PROP_CHARGE_FULL:

		if (get_prop_capacity(chip) == 100)

			val->intval = 1;

		else

			val->intval = 0;

		break;

	default:

		return -EINVAL;

	}
@@ -1291,6 +1363,10 @@ static int fg_power_set_property(struct power_supply *psy, 
		if (val->intval)

			update_sram_data(chip, &unused);

		break;

	case POWER_SUPPLY_PROP_CHARGE_FULL:

		if (val->intval)

			rc = fg_configure_soc(chip);

		break;

	default:

		return -EINVAL;

	};