Commit ded7fc7b authored by Ashish Jangam's avatar Ashish Jangam Committed by Anton Vorontsov
Browse files

power_supply: Add DA9052 battery driver 



Driver for DA9052 battery charger. This driver depends on DA9052 MFD core
dirver for definitions and methods.

This patch is functionally tested on Samsung SMDKV6410.

Signed-off-by: default avatarDavid Dajun Chen <dchen@diasemi.com>
Signed-off-by: default avatarAshish Jangam <ashish.jangam@kpitcummins.com>
Signed-off-by: default avatarAnton Vorontsov <cbouatmailru@gmail.com>
parent c934502d

drivers/power/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -150,6 +150,13 @@ config BATTERY_DA9030 
	  Say Y here to enable support for batteries charger integrated into

	  DA9030 PMIC.



config BATTERY_DA9052

	tristate "Dialog DA9052 Battery"

	depends on PMIC_DA9052

	help

	  Say Y here to enable support for batteries charger integrated into

	  DA9052 PMIC.



config BATTERY_MAX17040

	tristate "Maxim MAX17040 Fuel Gauge"

	depends on I2C

drivers/power/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o 
obj-$(CONFIG_BATTERY_SBS)	+= sbs-battery.o

obj-$(CONFIG_BATTERY_BQ27x00)	+= bq27x00_battery.o

obj-$(CONFIG_BATTERY_DA9030)	+= da9030_battery.o

obj-$(CONFIG_BATTERY_DA9052)	+= da9052-battery.o

obj-$(CONFIG_BATTERY_MAX17040)	+= max17040_battery.o

obj-$(CONFIG_BATTERY_MAX17042)	+= max17042_battery.o

obj-$(CONFIG_BATTERY_Z2)	+= z2_battery.o

drivers/power/da9052-battery.c

0 → 100644
+664 −0
Original line number Diff line number Diff line 
/*

 * Batttery Driver for Dialog DA9052 PMICs

 *

 * Copyright(c) 2011 Dialog Semiconductor Ltd.

 *

 * Author: David Dajun Chen <dchen@diasemi.com>

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 */



#include <linux/delay.h>

#include <linux/freezer.h>

#include <linux/fs.h>

#include <linux/jiffies.h>

#include <linux/module.h>

#include <linux/timer.h>

#include <linux/uaccess.h>

#include <linux/platform_device.h>

#include <linux/power_supply.h>



#include <linux/mfd/da9052/da9052.h>

#include <linux/mfd/da9052/pdata.h>

#include <linux/mfd/da9052/reg.h>



/* STATIC CONFIGURATION */

#define DA9052_BAT_CUTOFF_VOLT		2800

#define DA9052_BAT_TSH			62000

#define DA9052_BAT_LOW_CAP		4

#define DA9052_AVG_SZ			4

#define DA9052_VC_TBL_SZ		68

#define DA9052_VC_TBL_REF_SZ		3



#define DA9052_ISET_USB_MASK		0x0F

#define DA9052_CHG_USB_ILIM_MASK	0x40

#define DA9052_CHG_LIM_COLS		16



#define DA9052_MEAN(x, y)		((x + y) / 2)



enum charger_type_enum {

	DA9052_NOCHARGER = 1,

	DA9052_CHARGER,

};



static const u16 da9052_chg_current_lim[2][DA9052_CHG_LIM_COLS] = {

	{70,  80,  90,  100, 110, 120, 400,  450,

	 500, 550, 600, 650, 700, 900, 1100, 1300},

	{80,  90,  100, 110,  120,  400,  450,  500,

	 550, 600, 800, 1000, 1200, 1400, 1600, 1800},

};



static const u16 vc_tbl_ref[3] = {10, 25, 40};

/* Lookup table for voltage vs capacity */

static u32 const vc_tbl[3][68][2] = {

	/* For temperature 10 degree Celsius */

	{

	{4082, 100}, {4036, 98},

	{4020, 96}, {4008, 95},

	{3997, 93}, {3983, 91},

	{3964, 90}, {3943, 88},

	{3926, 87}, {3912, 85},

	{3900, 84}, {3890, 82},

	{3881, 80}, {3873, 79},

	{3865, 77}, {3857, 76},

	{3848, 74}, {3839, 73},

	{3829, 71}, {3820, 70},

	{3811, 68}, {3802, 67},

	{3794, 65}, {3785, 64},

	{3778, 62}, {3770, 61},

	{3763, 59}, {3756, 58},

	{3750, 56}, {3744, 55},

	{3738, 53}, {3732, 52},

	{3727, 50}, {3722, 49},

	{3717, 47}, {3712, 46},

	{3708, 44}, {3703, 43},

	{3700, 41}, {3696, 40},

	{3693, 38}, {3691, 37},

	{3688, 35}, {3686, 34},

	{3683, 32}, {3681, 31},

	{3678, 29}, {3675, 28},

	{3672, 26}, {3669, 25},

	{3665, 23}, {3661, 22},

	{3656, 21}, {3651, 19},

	{3645, 18}, {3639, 16},

	{3631, 15}, {3622, 13},

	{3611, 12}, {3600, 10},

	{3587, 9}, {3572, 7},

	{3548, 6}, {3503, 5},

	{3420, 3}, {3268, 2},

	{2992, 1}, {2746, 0}

	},

	/* For temperature 25 degree Celsius */

	{

	{4102, 100}, {4065, 98},

	{4048, 96}, {4034, 95},

	{4021, 93}, {4011, 92},

	{4001, 90}, {3986, 88},

	{3968, 87}, {3952, 85},

	{3938, 84}, {3926, 82},

	{3916, 81}, {3908, 79},

	{3900, 77}, {3892, 76},

	{3883, 74}, {3874, 73},

	{3864, 71}, {3855, 70},

	{3846, 68}, {3836, 67},

	{3827, 65}, {3819, 64},

	{3810, 62}, {3801, 61},

	{3793, 59}, {3786, 58},

	{3778, 56}, {3772, 55},

	{3765, 53}, {3759, 52},

	{3754, 50}, {3748, 49},

	{3743, 47}, {3738, 46},

	{3733, 44}, {3728, 43},

	{3724, 41}, {3720, 40},

	{3716, 38}, {3712, 37},

	{3709, 35}, {3706, 34},

	{3703, 33}, {3701, 31},

	{3698, 30}, {3696, 28},

	{3693, 27}, {3690, 25},

	{3687, 24}, {3683, 22},

	{3680, 21}, {3675, 19},

	{3671, 18}, {3666, 17},

	{3660, 15}, {3654, 14},

	{3647, 12}, {3639, 11},

	{3630, 9}, {3621, 8},

	{3613, 6}, {3606, 5},

	{3597, 4}, {3582, 2},

	{3546, 1}, {2747, 0}

	},

	/* For temperature 40 degree Celsius */

	{

	{4114, 100}, {4081, 98},

	{4065, 96}, {4050, 95},

	{4036, 93}, {4024, 92},

	{4013, 90}, {4002, 88},

	{3990, 87}, {3976, 85},

	{3962, 84}, {3950, 82},

	{3939, 81}, {3930, 79},

	{3921, 77}, {3912, 76},

	{3902, 74}, {3893, 73},

	{3883, 71}, {3874, 70},

	{3865, 68}, {3856, 67},

	{3847, 65}, {3838, 64},

	{3829, 62}, {3820, 61},

	{3812, 59}, {3803, 58},

	{3795, 56}, {3787, 55},

	{3780, 53}, {3773, 52},

	{3767, 50}, {3761, 49},

	{3756, 47}, {3751, 46},

	{3746, 44}, {3741, 43},

	{3736, 41}, {3732, 40},

	{3728, 38}, {3724, 37},

	{3720, 35}, {3716, 34},

	{3713, 33}, {3710, 31},

	{3707, 30}, {3704, 28},

	{3701, 27}, {3698, 25},

	{3695, 24}, {3691, 22},

	{3686, 21}, {3681, 19},

	{3676, 18}, {3671, 17},

	{3666, 15}, {3661, 14},

	{3655, 12}, {3648, 11},

	{3640, 9}, {3632, 8},

	{3622, 6}, {3616, 5},

	{3611, 4}, {3604, 2},

	{3594, 1}, {2747, 0}

	}

};



struct da9052_battery {

	struct da9052 *da9052;

	struct power_supply psy;

	struct notifier_block nb;

	int charger_type;

	int status;

	int health;

};



static inline int volt_reg_to_mV(int value)

{

	return ((value * 1000) / 512) + 2500;

}



static inline int ichg_reg_to_mA(int value)

{

	return (value * 3900) / 1000;

}



static int da9052_read_chgend_current(struct da9052_battery *bat,

				       int *current_mA)

{

	int ret;



	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)

		return -EINVAL;



	ret = da9052_reg_read(bat->da9052, DA9052_ICHG_END_REG);

	if (ret < 0)

		return ret;



	*current_mA = ichg_reg_to_mA(ret & DA9052_ICHGEND_ICHGEND);



	return 0;

}



static int da9052_read_chg_current(struct da9052_battery *bat, int *current_mA)

{

	int ret;



	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)

		return -EINVAL;



	ret = da9052_reg_read(bat->da9052, DA9052_ICHG_AV_REG);

	if (ret < 0)

		return ret;



	*current_mA = ichg_reg_to_mA(ret & DA9052_ICHGAV_ICHGAV);



	return 0;

}



static int da9052_bat_check_status(struct da9052_battery *bat, int *status)

{

	u8 v[2] = {0, 0};

	u8 bat_status;

	u8 chg_end;

	int ret;

	int chg_current;

	int chg_end_current;

	bool dcinsel;

	bool dcindet;

	bool vbussel;

	bool vbusdet;

	bool dc;

	bool vbus;



	ret = da9052_group_read(bat->da9052, DA9052_STATUS_A_REG, 2, v);

	if (ret < 0)

		return ret;



	bat_status = v[0];

	chg_end = v[1];



	dcinsel = bat_status & DA9052_STATUSA_DCINSEL;

	dcindet = bat_status & DA9052_STATUSA_DCINDET;

	vbussel = bat_status & DA9052_STATUSA_VBUSSEL;

	vbusdet = bat_status & DA9052_STATUSA_VBUSDET;

	dc = dcinsel && dcindet;

	vbus = vbussel && vbusdet;



	/* Preference to WALL(DCIN) charger unit */

	if (dc || vbus) {

		bat->charger_type = DA9052_CHARGER;



		/* If charging end flag is set and Charging current is greater

		 * than charging end limit then battery is charging

		*/

		if ((chg_end & DA9052_STATUSB_CHGEND) != 0) {

			ret = da9052_read_chg_current(bat, &chg_current);

			if (ret < 0)

				return ret;

			ret = da9052_read_chgend_current(bat, &chg_end_current);

			if (ret < 0)

				return ret;



			if (chg_current >= chg_end_current)

				bat->status = POWER_SUPPLY_STATUS_CHARGING;

			else

				bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;

		} else {

			/* If Charging end flag is cleared then battery is

			 * charging

			*/

			bat->status = POWER_SUPPLY_STATUS_CHARGING;

		}

	} else if (dcindet || vbusdet) {

			bat->charger_type = DA9052_CHARGER;

			bat->status = POWER_SUPPLY_STATUS_NOT_CHARGING;

	} else {

		bat->charger_type = DA9052_NOCHARGER;

		bat->status = POWER_SUPPLY_STATUS_DISCHARGING;

	}



	if (status != NULL)

		*status = bat->status;

	return 0;

}



static int da9052_bat_read_volt(struct da9052_battery *bat, int *volt_mV)

{

	int volt;



	volt = da9052_adc_manual_read(bat->da9052, DA9052_ADC_MAN_MUXSEL_VBAT);

	if (volt < 0)

		return volt;



	*volt_mV = volt_reg_to_mV(volt);



	return 0;

}



static int da9052_bat_check_presence(struct da9052_battery *bat, int *illegal)

{

	int bat_temp;



	bat_temp = da9052_adc_read_temp(bat->da9052);

	if (bat_temp < 0)

		return bat_temp;



	if (bat_temp > DA9052_BAT_TSH)

		*illegal = 1;

	else

		*illegal = 0;



	return 0;

}



static int da9052_bat_interpolate(int vbat_lower, int  vbat_upper,

				   int level_lower, int level_upper,

				   int bat_voltage)

{

	int tmp;



	tmp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower);

	tmp = level_lower + (((bat_voltage - vbat_lower) * tmp) / 1000);



	return tmp;

}



unsigned char da9052_determine_vc_tbl_index(unsigned char adc_temp)

{

	int i;



	if (adc_temp <= vc_tbl_ref[0])

		return 0;



	if (adc_temp > vc_tbl_ref[DA9052_VC_TBL_REF_SZ - 1])

		return DA9052_VC_TBL_REF_SZ - 1;



	for (i = 0; i < DA9052_VC_TBL_REF_SZ; i++) {

		if ((adc_temp > vc_tbl_ref[i]) &&

		    (adc_temp <= DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1])))

				return i;

		if ((adc_temp > DA9052_MEAN(vc_tbl_ref[i], vc_tbl_ref[i + 1]))

		     && (adc_temp <= vc_tbl_ref[i]))

				return i + 1;

	}

}



static int da9052_bat_read_capacity(struct da9052_battery *bat, int *capacity)

{

	int adc_temp;

	int bat_voltage;

	int vbat_lower;

	int vbat_upper;

	int level_upper;

	int level_lower;

	int ret;

	int flag;

	int i = 0;

	int j;



	ret = da9052_bat_read_volt(bat, &bat_voltage);

	if (ret < 0)

		return ret;



	adc_temp = da9052_adc_read_temp(bat->da9052);

	if (adc_temp < 0)

		return adc_temp;



	i = da9052_determine_vc_tbl_index(adc_temp);



	if (bat_voltage >= vc_tbl[i][0][0]) {

		*capacity = 100;

		return 0;

	}

	if (bat_voltage <= vc_tbl[i][DA9052_VC_TBL_SZ - 1][0]) {

		*capacity = 0;

		return 0;

	}

	flag = 0;



	for (j = 0; j < (DA9052_VC_TBL_SZ-1); j++) {

		if ((bat_voltage <= vc_tbl[i][j][0]) &&

		    (bat_voltage >= vc_tbl[i][j + 1][0])) {

			vbat_upper = vc_tbl[i][j][0];

			vbat_lower = vc_tbl[i][j + 1][0];

			level_upper = vc_tbl[i][j][1];

			level_lower = vc_tbl[i][j + 1][1];

			flag = 1;

			break;

		}

	}

	if (!flag)

		return -EIO;



	*capacity = da9052_bat_interpolate(vbat_lower, vbat_upper, level_lower,

					   level_upper, bat_voltage);



	return 0;

}



static int da9052_bat_check_health(struct da9052_battery *bat, int *health)

{

	int ret;

	int bat_illegal;

	int capacity;



	ret = da9052_bat_check_presence(bat, &bat_illegal);

	if (ret < 0)

		return ret;



	if (bat_illegal) {

		bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;

		return 0;

	}



	if (bat->health != POWER_SUPPLY_HEALTH_OVERHEAT) {

		ret = da9052_bat_read_capacity(bat, &capacity);

		if (ret < 0)

			return ret;

		if (capacity < DA9052_BAT_LOW_CAP)

			bat->health = POWER_SUPPLY_HEALTH_DEAD;

		else

			bat->health = POWER_SUPPLY_HEALTH_GOOD;

	}



	*health = bat->health;



	return 0;

}



static irqreturn_t da9052_bat_irq(int irq, void *data)

{

	struct da9052_battery *bat = data;



	irq -= bat->da9052->irq_base;



	if (irq == DA9052_IRQ_CHGEND)

		bat->status = POWER_SUPPLY_STATUS_FULL;

	else

		da9052_bat_check_status(bat, NULL);



	if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN ||

	    irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) {

		power_supply_changed(&bat->psy);

	}



	return IRQ_HANDLED;

}



static int da9052_USB_current_notifier(struct notifier_block *nb,

					unsigned long events, void *data)

{

	u8 row;

	u8 col;

	int *current_mA = data;

	int ret;

	struct da9052_battery *bat = container_of(nb, struct da9052_battery,

						  nb);



	if (bat->status == POWER_SUPPLY_STATUS_DISCHARGING)

		return -EPERM;



	ret = da9052_reg_read(bat->da9052, DA9052_CHGBUCK_REG);

	if (ret & DA9052_CHG_USB_ILIM_MASK)

		return -EPERM;



	if (bat->da9052->chip_id == DA9052)

		row = 0;

	else

		row = 1;



	if (*current_mA < da9052_chg_current_lim[row][0] ||

	    *current_mA > da9052_chg_current_lim[row][DA9052_CHG_LIM_COLS - 1])

		return -EINVAL;



	for (col = 0; col <= DA9052_CHG_LIM_COLS - 1 ; col++) {

		if (*current_mA <= da9052_chg_current_lim[row][col])

			break;

	}



	return da9052_reg_update(bat->da9052, DA9052_ISET_REG,

				 DA9052_ISET_USB_MASK, col);

}



static int da9052_bat_get_property(struct power_supply *psy,

				    enum power_supply_property psp,

				    union power_supply_propval *val)

{

	int ret;

	int illegal;

	struct da9052_battery *bat = container_of(psy, struct da9052_battery,

						  psy);



	ret = da9052_bat_check_presence(bat, &illegal);

	if (ret < 0)

		return ret;



	if (illegal && psp != POWER_SUPPLY_PROP_PRESENT)

		return -ENODEV;



	switch (psp) {

	case POWER_SUPPLY_PROP_STATUS:

		ret = da9052_bat_check_status(bat, &val->intval);

		break;

	case POWER_SUPPLY_PROP_ONLINE:

		val->intval =

			(bat->charger_type == DA9052_NOCHARGER) ? 0 : 1;

		break;

	case POWER_SUPPLY_PROP_PRESENT:

		ret = da9052_bat_check_presence(bat, &val->intval);

		break;

	case POWER_SUPPLY_PROP_HEALTH:

		ret = da9052_bat_check_health(bat, &val->intval);

		break;

	case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:

		val->intval = DA9052_BAT_CUTOFF_VOLT * 1000;

		break;

	case POWER_SUPPLY_PROP_VOLTAGE_AVG:

		ret = da9052_bat_read_volt(bat, &val->intval);

		break;

	case POWER_SUPPLY_PROP_CURRENT_AVG:

		ret = da9052_read_chg_current(bat, &val->intval);

		break;

	case POWER_SUPPLY_PROP_CAPACITY:

		ret = da9052_bat_read_capacity(bat, &val->intval);

		break;

	case POWER_SUPPLY_PROP_TEMP:

		val->intval = da9052_adc_read_temp(bat->da9052);

		ret = val->intval;

		break;

	case POWER_SUPPLY_PROP_TECHNOLOGY:

		val->intval = POWER_SUPPLY_TECHNOLOGY_LION;

		break;

	default:

		return -EINVAL;

	}

	return ret;

}



static enum power_supply_property da9052_bat_props[] = {

	POWER_SUPPLY_PROP_STATUS,

	POWER_SUPPLY_PROP_ONLINE,

	POWER_SUPPLY_PROP_PRESENT,

	POWER_SUPPLY_PROP_HEALTH,

	POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,

	POWER_SUPPLY_PROP_VOLTAGE_AVG,

	POWER_SUPPLY_PROP_CURRENT_AVG,

	POWER_SUPPLY_PROP_CAPACITY,

	POWER_SUPPLY_PROP_TEMP,

	POWER_SUPPLY_PROP_TECHNOLOGY,

};



static struct power_supply template_battery = {

	.name		= "da9052-bat",

	.type		= POWER_SUPPLY_TYPE_BATTERY,

	.properties	= da9052_bat_props,

	.num_properties	= ARRAY_SIZE(da9052_bat_props),

	.get_property	= da9052_bat_get_property,

};



static const char *const da9052_bat_irqs[] = {

	"BATT TEMP",

	"DCIN DET",

	"DCIN REM",

	"VBUS DET",

	"VBUS REM",

	"CHG END",

};



static s32 __devinit da9052_bat_probe(struct platform_device *pdev)

{

	struct da9052_pdata *pdata;

	struct da9052_battery *bat;

	int ret;

	int irq;

	int i;



	bat = kzalloc(sizeof(struct da9052_battery), GFP_KERNEL);

	if (!bat)

		return -ENOMEM;



	bat->da9052 = dev_get_drvdata(pdev->dev.parent);

	bat->psy = template_battery;

	bat->charger_type = DA9052_NOCHARGER;

	bat->status = POWER_SUPPLY_STATUS_UNKNOWN;

	bat->health = POWER_SUPPLY_HEALTH_UNKNOWN;

	bat->nb.notifier_call = da9052_USB_current_notifier;



	pdata = bat->da9052->dev->platform_data;

	if (pdata != NULL && pdata->use_for_apm)

		bat->psy.use_for_apm = pdata->use_for_apm;

	else

		bat->psy.use_for_apm = 1;



	for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) {

		irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]);

		ret = request_threaded_irq(bat->da9052->irq_base + irq,

					   NULL, da9052_bat_irq,

					   IRQF_TRIGGER_LOW | IRQF_ONESHOT,

					   da9052_bat_irqs[i], bat);

		if (ret != 0) {

			dev_err(bat->da9052->dev,

				"DA9052 failed to request %s IRQ %d: %d\n",

				da9052_bat_irqs[i], irq, ret);

			goto err;

		}

	}



	ret = power_supply_register(&pdev->dev, &bat->psy);

	 if (ret)

		goto err;



	return 0;



err:

	for (; i >= 0; i--) {

		irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]);

		free_irq(bat->da9052->irq_base + irq, bat);

	}

	kfree(bat);

	return ret;

}

static int __devexit da9052_bat_remove(struct platform_device *pdev)

{

	int i;

	int irq;

	struct da9052_battery *bat = platform_get_drvdata(pdev);



	for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) {

		irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]);

		free_irq(bat->da9052->irq_base + irq, bat);

	}

	power_supply_unregister(&bat->psy);



	return 0;

}



static struct platform_driver da9052_bat_driver = {

	.probe = da9052_bat_probe,

	.remove = __devexit_p(da9052_bat_remove),

	.driver = {

		.name = "da9052-bat",

		.owner = THIS_MODULE,

	},

};



static int __init da9052_bat_init(void)

{

	return platform_driver_register(&da9052_bat_driver);

}

module_init(da9052_bat_init);



static void __exit da9052_bat_exit(void)

{

	platform_driver_unregister(&da9052_bat_driver);

}

module_exit(da9052_bat_exit);



MODULE_DESCRIPTION("DA9052 BAT Device Driver");

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");

MODULE_LICENSE("GPL");

MODULE_ALIAS("platform:da9052-bat");