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Commit 19dd6bcd authored by Ramakrishna Pallala's avatar Ramakrishna Pallala Committed by Anton Vorontsov
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smb347-charger: Add constant charge and current properties 



This patch makes use of the two new properties in smb347 charger driver.

Signed-off-by: default avatarRamakrishna Pallala <ramakrishna.pallala@intel.com>
Signed-off-by: default avatarAnton Vorontsov <cbouatmailru@gmail.com>
parent 3824c477

drivers/power/smb347-charger.c

+117 −6
Original line number Diff line number Diff line
@@ -196,6 +196,14 @@ static const unsigned int ccc_tbl[] = { 
	1200000,

};



/* Convert register value to current using lookup table */

static int hw_to_current(const unsigned int *tbl, size_t size, unsigned int val)

{

	if (val >= size)

		return -EINVAL;

	return tbl[val];

}



/* Convert current to register value using lookup table */

static int current_to_hw(const unsigned int *tbl, size_t size, unsigned int val)

{
@@ -841,22 +849,101 @@ static int smb347_irq_init(struct smb347_charger *smb, 
	return ret;

}



/*

 * Returns the constant charge current programmed

 * into the charger in uA.

 */

static int get_const_charge_current(struct smb347_charger *smb)

{

	int ret, intval;

	unsigned int v;



	if (!smb347_is_ps_online(smb))

		return -ENODATA;



	ret = regmap_read(smb->regmap, STAT_B, &v);

	if (ret < 0)

		return ret;



	/*

	 * The current value is composition of FCC and PCC values

	 * and we can detect which table to use from bit 5.

	 */

	if (v & 0x20) {

		intval = hw_to_current(fcc_tbl, ARRAY_SIZE(fcc_tbl), v & 7);

	} else {

		v >>= 3;

		intval = hw_to_current(pcc_tbl, ARRAY_SIZE(pcc_tbl), v & 7);

	}



	return intval;

}



/*

 * Returns the constant charge voltage programmed

 * into the charger in uV.

 */

static int get_const_charge_voltage(struct smb347_charger *smb)

{

	int ret, intval;

	unsigned int v;



	if (!smb347_is_ps_online(smb))

		return -ENODATA;



	ret = regmap_read(smb->regmap, STAT_A, &v);

	if (ret < 0)

		return ret;



	v &= STAT_A_FLOAT_VOLTAGE_MASK;

	if (v > 0x3d)

		v = 0x3d;



	intval = 3500000 + v * 20000;



	return intval;

}



static int smb347_mains_get_property(struct power_supply *psy,

				     enum power_supply_property prop,

				     union power_supply_propval *val)

{

	struct smb347_charger *smb =

		container_of(psy, struct smb347_charger, mains);

	int ret;



	if (prop == POWER_SUPPLY_PROP_ONLINE) {

	switch (prop) {

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval = smb->mains_online;

		return 0;

	}

		break;



	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:

		ret = get_const_charge_voltage(smb);

		if (ret < 0)

			return ret;

		else

			val->intval = ret;

		break;



	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:

		ret = get_const_charge_current(smb);

		if (ret < 0)

			return ret;

		else

			val->intval = ret;

		break;



	default:

		return -EINVAL;

	}



	return 0;

}



static enum power_supply_property smb347_mains_properties[] = {

	POWER_SUPPLY_PROP_ONLINE,

	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,

	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,

};



static int smb347_usb_get_property(struct power_supply *psy,
@@ -865,16 +952,40 @@ static int smb347_usb_get_property(struct power_supply *psy, 
{

	struct smb347_charger *smb =

		container_of(psy, struct smb347_charger, usb);

	int ret;



	if (prop == POWER_SUPPLY_PROP_ONLINE) {

	switch (prop) {

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval = smb->usb_online;

		return 0;

	}

		break;



	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:

		ret = get_const_charge_voltage(smb);

		if (ret < 0)

			return ret;

		else

			val->intval = ret;

		break;



	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:

		ret = get_const_charge_current(smb);

		if (ret < 0)

			return ret;

		else

			val->intval = ret;

		break;



	default:

		return -EINVAL;

	}



	return 0;

}



static enum power_supply_property smb347_usb_properties[] = {

	POWER_SUPPLY_PROP_ONLINE,

	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,

	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,

};



static int smb347_battery_get_property(struct power_supply *psy,