| /* |
| * Copyright (C) 2013 Samsung Electronics |
| * Piotr Wilczek <p.wilczek@samsung.com> |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <power/pmic.h> |
| #include <power/max77693_fg.h> |
| #include <i2c.h> |
| #include <power/power_chrg.h> |
| #include <power/battery.h> |
| #include <power/fg_battery_cell_params.h> |
| #include <errno.h> |
| |
| static int max77693_get_vcell(u32 *vcell) |
| { |
| u16 value; |
| u8 ret; |
| |
| ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VCELL, 1, |
| (u8 *)&value, 2); |
| if (ret) |
| return ret; |
| |
| *vcell = (u32)(value >> 3); |
| *vcell = *vcell * 625; |
| |
| return 0; |
| } |
| |
| static int max77693_get_soc(u32 *soc) |
| { |
| u16 value; |
| u8 ret; |
| |
| ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VFSOC, 1, |
| (u8 *)&value, 2); |
| if (ret) |
| return ret; |
| |
| *soc = (u32)(value >> 8); |
| |
| return 0; |
| } |
| |
| static int power_update_battery(struct pmic *p, struct pmic *bat) |
| { |
| struct power_battery *pb = bat->pbat; |
| int ret; |
| |
| if (pmic_probe(p)) { |
| puts("Can't find max77693 fuel gauge\n"); |
| return -ENODEV; |
| } |
| |
| ret = max77693_get_soc(&pb->bat->state_of_chrg); |
| if (ret) |
| return ret; |
| |
| max77693_get_vcell(&pb->bat->voltage_uV); |
| if (ret) |
| return ret; |
| |
| return 0; |
| } |
| |
| static int power_check_battery(struct pmic *p, struct pmic *bat) |
| { |
| struct power_battery *pb = bat->pbat; |
| unsigned int val; |
| int ret = 0; |
| |
| if (pmic_probe(p)) { |
| puts("Can't find max77693 fuel gauge\n"); |
| return -ENODEV; |
| } |
| |
| ret = pmic_reg_read(p, MAX77693_STATUS, &val); |
| if (ret) |
| return ret; |
| debug("fg status: 0x%x\n", val); |
| |
| ret = pmic_reg_read(p, MAX77693_VERSION, &pb->bat->version); |
| if (ret) |
| return ret; |
| |
| ret = power_update_battery(p, bat); |
| if (ret) |
| return ret; |
| debug("fg ver: 0x%x\n", pb->bat->version); |
| printf("BAT: state_of_charge(SOC):%d%%\n", |
| pb->bat->state_of_chrg); |
| |
| printf(" voltage: %d.%6.6d [V] (expected to be %d [mAh])\n", |
| pb->bat->voltage_uV / 1000000, |
| pb->bat->voltage_uV % 1000000, |
| pb->bat->capacity); |
| |
| if (pb->bat->voltage_uV > 3850000) |
| pb->bat->state = EXT_SOURCE; |
| else if (pb->bat->voltage_uV < 3600000 || pb->bat->state_of_chrg < 5) |
| pb->bat->state = CHARGE; |
| else |
| pb->bat->state = NORMAL; |
| |
| return 0; |
| } |
| |
| static struct power_fg power_fg_ops = { |
| .fg_battery_check = power_check_battery, |
| .fg_battery_update = power_update_battery, |
| }; |
| |
| int power_fg_init(unsigned char bus) |
| { |
| static const char name[] = "MAX77693_FG"; |
| struct pmic *p = pmic_alloc(); |
| |
| if (!p) { |
| printf("%s: POWER allocation error!\n", __func__); |
| return -ENOMEM; |
| } |
| |
| debug("Board Fuel Gauge init\n"); |
| |
| p->name = name; |
| p->interface = PMIC_I2C; |
| p->number_of_regs = FG_NUM_OF_REGS; |
| p->hw.i2c.addr = MAX77693_FUEL_I2C_ADDR; |
| p->hw.i2c.tx_num = 2; |
| p->sensor_byte_order = PMIC_SENSOR_BYTE_ORDER_BIG; |
| p->bus = bus; |
| |
| p->fg = &power_fg_ops; |
| |
| return 0; |
| } |