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