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Commit 849ac80a authored by Subbaraman Narayanamurthy's avatar Subbaraman Narayanamurthy
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power: qpnp-smbcharger: support enable/disable safety timers 



Currently, pre-charge and total charge safety timers are enabled
by default if the safety timer timeouts are configured. Add support
to disable/enable them through POWER_SUPPLY_PROP_SAFETY_TIMER_ENABLE
property.

CRs-Fixed: 773772
Change-Id: Iff7d66b3bf391c2c7b5bdabfdf2147d3fce9065d
Signed-off-by: default avatarSubbaraman Narayanamurthy <subbaram@codeaurora.org>
parent 1b801a47

drivers/power/qpnp-smbcharger.c

+49 −7
Original line number Diff line number Diff line
@@ -148,6 +148,7 @@ struct smbchg_chip { 
	ktime_t				otg_enable_time;

	bool				aicl_deglitch_on;

	bool				sw_esr_pulse_en;

	bool				safety_timer_en;



	/* jeita and temperature */

	bool				batt_hot;
@@ -628,6 +629,7 @@ static enum power_supply_property smbchg_battery_properties[] = { 
	POWER_SUPPLY_PROP_CURRENT_NOW,

	POWER_SUPPLY_PROP_TEMP,

	POWER_SUPPLY_PROP_VOLTAGE_NOW,

	POWER_SUPPLY_PROP_SAFETY_TIMER_ENABLE,

};



#define CHGR_STS			0x0E
@@ -2290,6 +2292,38 @@ static int smbchg_float_voltage_get(struct smbchg_chip *chip) 
	return chip->vfloat_mv;

}



#define SFT_CFG				0xFD

#define SFT_EN_MASK			SMB_MASK(5, 4)

#define SFT_TO_MASK			SMB_MASK(3, 2)

#define PRECHG_SFT_TO_MASK		SMB_MASK(1, 0)

#define SFT_TIMER_DISABLE_BIT		BIT(5)

#define PRECHG_SFT_TIMER_DISABLE_BIT	BIT(4)

#define SAFETY_TIME_MINUTES_SHIFT	2

static int smbchg_safety_timer_enable(struct smbchg_chip *chip, bool enable)

{

	int rc;

	u8 reg;



	if (enable == chip->safety_timer_en)

		return 0;



	if (enable)

		reg = 0;

	else

		reg = SFT_TIMER_DISABLE_BIT | PRECHG_SFT_TIMER_DISABLE_BIT;



	rc = smbchg_sec_masked_write(chip, chip->chgr_base + SFT_CFG,

			SFT_EN_MASK, reg);

	if (rc < 0) {

		dev_err(chip->dev,

			"Couldn't %s safety timer rc = %d\n",

			enable ? "enable" : "disable", rc);

		return rc;

	}

	chip->safety_timer_en = enable;

	return 0;

}



static int smbchg_battery_set_property(struct power_supply *psy,

				       enum power_supply_property prop,

				       const union power_supply_propval *val)
@@ -2318,6 +2352,9 @@ static int smbchg_battery_set_property(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_VOLTAGE_MAX:

		rc = smbchg_float_voltage_set(chip, val->intval);

		break;

	case POWER_SUPPLY_PROP_SAFETY_TIMER_ENABLE:

		rc = smbchg_safety_timer_enable(chip, val->intval);

		break;

	default:

		return -EINVAL;

	}
@@ -2336,6 +2373,7 @@ static int smbchg_battery_is_writeable(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_SYSTEM_TEMP_LEVEL:

	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:

	case POWER_SUPPLY_PROP_VOLTAGE_MAX:

	case POWER_SUPPLY_PROP_SAFETY_TIMER_ENABLE:

		rc = 1;

		break;

	default:
@@ -2399,6 +2437,9 @@ static int smbchg_battery_get_property(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:

		val->intval = get_prop_batt_voltage_max_design(chip);

		break;

	case POWER_SUPPLY_PROP_SAFETY_TIMER_ENABLE:

		val->intval = chip->safety_timer_en;

		break;

	default:

		return -EINVAL;

	}
@@ -3763,15 +3804,8 @@ static inline int get_bpd(const char *name) 
#define CHG_ITERM_MASK			SMB_MASK(2, 0)

#define USB51_COMMAND_POL		BIT(2)

#define USB51AC_CTRL			BIT(1)

#define SFT_CFG				0xFD

#define TR_8OR32B			0xFE

#define BUCK_8_16_FREQ_BIT		BIT(0)

#define SFT_EN_MASK			SMB_MASK(5, 4)

#define SFT_TO_MASK			SMB_MASK(3, 2)

#define PRECHG_SFT_TO_MASK		SMB_MASK(1, 0)

#define SFT_TIMER_DISABLE_BIT		BIT(5)

#define PRECHG_SFT_TIMER_DISABLE_BIT	BIT(4)

#define SAFETY_TIME_MINUTES_SHIFT	2

#define BM_CFG				0xF3

#define BATT_MISSING_ALGO_BIT		BIT(2)

#define BMD_PIN_SRC_MASK		SMB_MASK(1, 0)
@@ -3992,6 +4026,14 @@ static int smbchg_hw_init(struct smbchg_chip *chip) 
				rc);

			return rc;

		}

		chip->safety_timer_en = true;

	} else {

		rc = smbchg_read(chip, &reg, chip->chgr_base + SFT_CFG, 1);

		if (rc < 0)

			dev_err(chip->dev, "Unable to read SFT_CFG rc = %d\n",

				rc);

		else if (!(reg & SFT_EN_MASK))

			chip->safety_timer_en = true;

	}



	/* make the buck switch faster to prevent some vbus oscillation */