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

Tested on Samsung SMDK6410 board with DA9052-BC and DA9053-BA evaluation boards.

Signed-off-by: David Dajun Chen dchen@diasemi.com Signed-off-by: Ashish Jangam ashish.jangam@kpitcummins.com --- Changes since v3 - Included power_supply.h file - Corrected the definition of DA9052_BAT_THRESHOLD macro - Changed definition of charger_type_enum - Added API da9052_battery_read_end_current - Added API da9052_battery_check_status - Changed the way of handling the interrupts in da9052_bat_irq Changes since v2 - Correct code styling for inline functions - Remove averaging algorithm - Set use_for_apm thru board specific parameter --- drivers/power/Kconfig | 7 + drivers/power/Makefile | 1 + drivers/power/da9052-battery.c | 611 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 619 insertions(+), 0 deletions(-) create mode 100644 drivers/power/da9052-battery.c

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig index 9f88641..9696502 100644 --- a/drivers/power/Kconfig +++ b/drivers/power/Kconfig @@ -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 diff --git a/drivers/power/Makefile b/drivers/power/Makefile index b4af13d..c570e20 100644 --- a/drivers/power/Makefile +++ b/drivers/power/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_BATTERY_WM97XX) += wm97xx_battery.o obj-$(CONFIG_BATTERY_BQ20Z75) += bq20z75.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 diff --git a/drivers/power/da9052-battery.c b/drivers/power/da9052-battery.c new file mode 100644 index 0000000..d9096df --- /dev/null +++ b/drivers/power/da9052-battery.c @@ -0,0 +1,611 @@ +/* + * 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_THRESHOLD 62000 +#define DA9052_BAT_CAPACITY_LIMIT_LOW 4 +#define DA9052_AVERAGE_SIZE 4 +#define DA9052_LOOK_UP_TABLE_SIZE 68 +#define DA9052_NO_OF_LOOKUP_TABLE 3 + +enum charger_type_enum { + DA9052_NOCHARGER = 1, + DA9052_CHARGER, +}; + +static const u16 temperature_lookup_ref[3] = {10, 25, 40}; +static u32 const vbat_vs_capacity_look_up[3][68][2] = { + /* For temperature 10 degree celisus*/ + { + {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 celisus */ + { + {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 celisus*/ + { + {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; + 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_battery_read_end_current(struct da9052_battery *battery, + int *current_mA) +{ + int ret; + + if (battery->status == POWER_SUPPLY_STATUS_DISCHARGING) + return -EINVAL; + + ret = da9052_reg_read(battery->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_battery_read_current(struct da9052_battery *battery, + int *current_mA) +{ + int ret; + + if (battery->status == POWER_SUPPLY_STATUS_DISCHARGING) + return -EINVAL; + + ret = da9052_reg_read(battery->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_battery_check_status(struct da9052_battery *battery, + int *status) +{ + uint8_t v[2] = {0, 0}; + uint8_t bat_status, chg_end; + int ret, chg_current, chg_end_current; + + ret = da9052_group_read(battery->da9052, DA9052_STATUS_A_REG, 2, v); + if (ret < 0) + return ret; + + bat_status = v[0]; + chg_end = v[1]; + + /* Preference to WALL(DCIN) charger unit */ + if (((bat_status & DA9052_STATUSA_DCINSEL) && + (bat_status & DA9052_STATUSA_DCINDET)) + || + ((bat_status & DA9052_STATUSA_VBUSSEL) && + (bat_status & DA9052_STATUSA_VBUSDET)) + ) { + battery->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_battery_read_current(battery, + &chg_current); + if (ret < 0) + return ret; + ret = da9052_battery_read_end_current(battery, + &chg_end_current); + if (ret < 0) + return ret; + + if (chg_current >= chg_end_current) + battery->status = POWER_SUPPLY_STATUS_CHARGING; + else + battery->status = + POWER_SUPPLY_STATUS_NOT_CHARGING; + } + /* If Charging end flag is cleared then battery is charging */ + else + battery->status = POWER_SUPPLY_STATUS_CHARGING; + } else if (bat_status & DA9052_STATUSA_DCINDET || + bat_status & DA9052_STATUSA_VBUSDET) { + battery->charger_type = DA9052_CHARGER; + battery->status = POWER_SUPPLY_STATUS_NOT_CHARGING; + } else { + battery->charger_type = DA9052_NOCHARGER; + battery->status = POWER_SUPPLY_STATUS_DISCHARGING; + } + + if (status != NULL) + *status = battery->status; + return 0; +} + +static int da9052_battery_read_volt(struct da9052_battery *battery, + int *volt_mV) +{ + int voltage; + + voltage = da9052_adc_manual_read(battery->da9052, + DA9052_ADC_MAN_MUXSEL_VBAT); + if (voltage < 0) + return voltage; + + *volt_mV = volt_reg_to_mV(voltage); + + return 0; +} + +static int da9052_battery_check_presence(struct da9052_battery *battery, + int *illegal) +{ + int bat_temp; + + bat_temp = da9052_adc_temperature_read(battery->da9052); + if (bat_temp < 0) + return bat_temp; + + if (bat_temp > DA9052_BAT_THRESHOLD) + *illegal = 1; + else + *illegal = 0; + + return 0; +} + +static int interpolated(int vbat_lower, int vbat_upper, int level_lower, + int level_upper, int bat_voltage) +{ + int temp; + + temp = ((level_upper - level_lower) * 1000) / (vbat_upper - vbat_lower); + temp = level_lower + (((bat_voltage - vbat_lower) * temp) / 1000); + + return temp; +} + +unsigned char select_temperature(unsigned char temp_index, int bat_temperature) +{ + int temp_temperature; + + temp_temperature = (temperature_lookup_ref[temp_index] + + temperature_lookup_ref[temp_index + 1]) / 2; + + if (bat_temperature >= temp_temperature) { + temp_index += 1; + return temp_index; + } else + return temp_index; +} + +static int da9052_battery_read_capacity(struct da9052_battery *battery, + int *capacity) +{ + int bat_temperature, bat_voltage; + int vbat_lower, vbat_upper, level_upper, level_lower; + int ret, flag, index, access_index = 0; + + ret = da9052_battery_read_volt(battery, &bat_voltage); + if (ret < 0) + return ret; + + bat_temperature = da9052_adc_temperature_read(battery->da9052); + if (bat_temperature < 0) + return bat_temperature; + + for (index = 0; index < (DA9052_NO_OF_LOOKUP_TABLE - 1); index++) { + if (bat_temperature <= temperature_lookup_ref[0]) { + access_index = 0; + break; + } else if (bat_temperature > + temperature_lookup_ref[DA9052_NO_OF_LOOKUP_TABLE]) { + access_index = DA9052_NO_OF_LOOKUP_TABLE - 1; + break; + } else if ((bat_temperature >= temperature_lookup_ref[index]) && + (bat_temperature >= temperature_lookup_ref[index + 1] + )) { + access_index = select_temperature(index, + bat_temperature); + break; + } + } + if (bat_voltage >= vbat_vs_capacity_look_up[access_index][0][0]) { + *capacity = 100; + return 0; + } + if (bat_voltage <= vbat_vs_capacity_look_up[access_index] + [DA9052_LOOK_UP_TABLE_SIZE - 1][0]) { + *capacity = 0; + return 0; + } + flag = 0; + + for (index = 0; index < (DA9052_LOOK_UP_TABLE_SIZE-1); index++) { + if ((bat_voltage <= + vbat_vs_capacity_look_up[access_index][index][0]) && + (bat_voltage >= + vbat_vs_capacity_look_up[access_index][index + 1][0])) { + vbat_upper = + vbat_vs_capacity_look_up[access_index][index][0]; + vbat_lower = + vbat_vs_capacity_look_up[access_index][index + 1][0]; + level_upper = + vbat_vs_capacity_look_up[access_index][index][1]; + level_lower = + vbat_vs_capacity_look_up[access_index][index + 1][1]; + flag = 1; + break; + } + } + if (!flag) + return -EIO; + + *capacity = interpolated(vbat_lower, vbat_upper, level_lower, + level_upper, bat_voltage); + + return 0; +} + +static int da9052_battery_check_health(struct da9052_battery *battery, + int *health) +{ + int ret, bat_illegal, capacity; + + ret = da9052_battery_check_presence(battery, &bat_illegal); + if (ret < 0) + return ret; + + if (bat_illegal) { + battery->health = POWER_SUPPLY_HEALTH_UNKNOWN; + return 0; + } + + if (battery->health != POWER_SUPPLY_HEALTH_OVERHEAT) { + ret = da9052_battery_read_capacity(battery, &capacity); + if (ret < 0) + return ret; + if (capacity < DA9052_BAT_CAPACITY_LIMIT_LOW) + battery->health = POWER_SUPPLY_HEALTH_DEAD; + else + battery->health = POWER_SUPPLY_HEALTH_GOOD; + } + + *health = battery->health; + + return 0; +} + +static irqreturn_t da9052_bat_irq(int irq, void *data) +{ + struct da9052_battery *battery = (struct da9052_battery *)data; + + irq -= battery->da9052->irq_base; + + if (irq == DA9052_IRQ_CHGEND) + battery->status = POWER_SUPPLY_STATUS_FULL; + else + da9052_battery_check_status(battery, NULL); + + if (irq == DA9052_IRQ_CHGEND || irq == DA9052_IRQ_DCIN || + irq == DA9052_IRQ_VBUS || irq == DA9052_IRQ_TBAT) { + power_supply_changed(&battery->psy); + } + + return IRQ_HANDLED; +} + +static int da9052_bat_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + int ret, illegal; + struct da9052_battery *battery = container_of(psy, + struct da9052_battery, psy); + + ret = da9052_battery_check_presence(battery, &illegal); + if (ret < 0) + return ret; + + if (illegal && psp != POWER_SUPPLY_PROP_PRESENT) + return -ENODEV; + + switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + ret = da9052_battery_check_status(battery, &val->intval); + break; + case POWER_SUPPLY_PROP_ONLINE: + val->intval = + (battery->charger_type == DA9052_NOCHARGER) ? 0 : 1; + break; + case POWER_SUPPLY_PROP_PRESENT: + ret = da9052_battery_check_presence(battery, &val->intval); + break; + case POWER_SUPPLY_PROP_HEALTH: + ret = da9052_battery_check_health(battery, &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_battery_read_volt(battery, &val->intval); + break; + case POWER_SUPPLY_PROP_CURRENT_AVG: + ret = da9052_battery_read_current(battery, &val->intval); + break; + case POWER_SUPPLY_PROP_CAPACITY: + ret = da9052_battery_read_capacity(battery, &val->intval); + break; + case POWER_SUPPLY_PROP_TEMP: + val->intval = da9052_adc_temperature_read(battery->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 *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 *battery; + int ret, irq, i; + + battery = kzalloc(sizeof(struct da9052_battery), GFP_KERNEL); + if (!battery) + return -ENOMEM; + + battery->da9052 = dev_get_drvdata(pdev->dev.parent); + pdata = battery->da9052->dev->platform_data; + + battery->psy = template_battery; + if (pdata != NULL && pdata->use_for_apm) + battery->psy.use_for_apm = pdata->use_for_apm; + battery->charger_type = DA9052_NOCHARGER; + battery->status = POWER_SUPPLY_STATUS_UNKNOWN; + battery->health = POWER_SUPPLY_HEALTH_UNKNOWN; + + for (i = 0; i < ARRAY_SIZE(da9052_bat_irqs); i++) { + irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]); + ret = request_threaded_irq(battery->da9052->irq_base + irq, + NULL, da9052_bat_irq, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + da9052_bat_irqs[i], battery); + if (ret != 0) { + dev_err(battery->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, &battery->psy); + if (ret) + goto err; + + return 0; + +err: + for (; i >= 0; i--) { + irq = platform_get_irq_byname(pdev, da9052_bat_irqs[i]); + free_irq(irq, battery); + } + kfree(battery); + return ret; +} +static int __devexit da9052_bat_remove(struct platform_device *pdev) +{ + int i, irq; + struct da9052_battery *battery = 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(irq, battery); + } + power_supply_unregister(&battery->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");