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Commit 29a77faf authored by Jie Cheng's avatar Jie Cheng
Browse files

power: qpnp-linear-charger: Add BMS controlled charging 



Allow the BMS to control the charging by writing the STATUS
property of battery power-supply.

To enable this feature, following DT param needs to be defined:
- qcom,bms-controlled-charging: This enables BMS to control the
recharge.

Change-Id: I84471d083c2d101066c483e9a01376f5d2c992a5
Signed-off-by: default avatarJie Cheng <rockiec@codeaurora.org>
parent 6eae9c61

Documentation/devicetree/bindings/power/qpnp-linear-charger.txt

+4 −0
Original line number Diff line number Diff line
@@ -97,6 +97,10 @@ Parent node optional properties: 
					charger module, it is used to control a

					led which can act as a charger led as well

					as a general notification led.

- qcom,bms-controlled-charging		This property enables BMS to control

					charging. BMS and charger communicates

					with each other via power_supply

					framework.



Sub node required structure:

- A qcom,charger node must be a child of an SPMI node that has specified

drivers/power/qpnp-linear-charger.c

+31 −3
Original line number Diff line number Diff line
@@ -320,6 +320,7 @@ struct qpnp_lbc_chip { 
	bool				fastchg_on;

	bool				cfg_use_external_charger;

	bool				cfg_chgr_led_support;

	bool				cfg_bms_controlled_charging;

	unsigned int			cfg_warm_bat_chg_ma;

	unsigned int			cfg_cool_bat_chg_ma;

	unsigned int			cfg_safe_voltage_mv;
@@ -1214,7 +1215,8 @@ static int get_prop_capacity(struct qpnp_lbc_chip *chip) 
				&& charger_in

				&& !chip->cfg_charging_disabled

				&& chip->cfg_soc_resume_limit

				&& ret.intval <= chip->cfg_soc_resume_limit) {

				&& ret.intval <= chip->cfg_soc_resume_limit

				&& !chip->cfg_bms_controlled_charging) {

			pr_debug("resuming charging at %d%% soc\n",

					ret.intval);

			if (!chip->cfg_disable_vbatdet_based_recharge)
@@ -1489,9 +1491,10 @@ static int qpnp_batt_power_set_property(struct power_supply *psy, 


	switch (psp) {

	case POWER_SUPPLY_PROP_STATUS:

		mutex_lock(&chip->chg_enable_lock);



		if (val->intval == POWER_SUPPLY_STATUS_FULL &&

				!chip->cfg_float_charge) {

			mutex_lock(&chip->chg_enable_lock);



			/* Disable charging */

			rc = qpnp_lbc_charger_enable(chip, SOC, 0);
@@ -1518,8 +1521,29 @@ static int qpnp_batt_power_set_property(struct power_supply *psy, 
						&chip->irqs[CHG_VBAT_DET_LO]);

			}



			mutex_unlock(&chip->chg_enable_lock);

		}



		if (chip->cfg_bms_controlled_charging) {

			switch (val->intval) {

			case POWER_SUPPLY_STATUS_CHARGING:

				chip->chg_done = false;

				pr_debug("resuming charging by bms\n");

				if (!chip->cfg_disable_vbatdet_based_recharge)

					qpnp_lbc_vbatdet_override(chip,

								OVERRIDE_0);

				qpnp_lbc_charger_enable(chip, SOC, 1);

				break;

			case POWER_SUPPLY_STATUS_DISCHARGING:

				chip->chg_done = false;

				pr_debug("status = DISCHARGING chg_done = %d\n",

						chip->chg_done);

				break;

			default:

				break;

			}

		}



		mutex_unlock(&chip->chg_enable_lock);

		break;

	case POWER_SUPPLY_PROP_COOL_TEMP:

		rc = qpnp_lbc_configure_jeita(chip, psp, val->intval);
@@ -2013,6 +2037,10 @@ static int qpnp_charger_read_dt_props(struct qpnp_lbc_chip *chip) 
			of_property_read_bool(chip->spmi->dev.of_node,

					"qcom,chgr-led-support");



	chip->cfg_bms_controlled_charging =

			of_property_read_bool(chip->spmi->dev.of_node,

					"qcom,bms-controlled-charging");



	/* Disable charging when faking battery values */

	if (chip->cfg_use_fake_battery)

		chip->cfg_charging_disabled = true;