[thirdparty/u-boot.git] / drivers / power / mfd / fg_max77693.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2013 Samsung Electronics
 * Piotr Wilczek <p.wilczek@samsung.com>
 */

#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);

	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;
}
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
04750447 PW	2	/*
	3	* Copyright (C) 2013 Samsung Electronics
	4	* Piotr Wilczek <p.wilczek@samsung.com>
04750447 PW	5	*/
	6
	7	#include <common.h>
	8	#include <power/pmic.h>
	9	#include <power/max77693_fg.h>
	10	#include <i2c.h>
	11	#include <power/power_chrg.h>
	12	#include <power/battery.h>
	13	#include <power/fg_battery_cell_params.h>
	14	#include <errno.h>
	15
	16	static int max77693_get_vcell(u32 *vcell)
	17	{
	18	u16 value;
	19	u8 ret;
	20
	21	ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VCELL, 1,
	22	(u8 *)&value, 2);
	23	if (ret)
	24	return ret;
	25
	26	*vcell = (u32)(value >> 3);
	27	vcell = vcell * 625;
	28
	29	return 0;
	30	}
	31
	32	static int max77693_get_soc(u32 *soc)
	33	{
	34	u16 value;
	35	u8 ret;
	36
	37	ret = i2c_read(MAX77693_FUEL_I2C_ADDR, MAX77693_VFSOC, 1,
	38	(u8 *)&value, 2);
	39	if (ret)
	40	return ret;
	41
	42	*soc = (u32)(value >> 8);
	43
	44	return 0;
	45	}
	46
	47	static int power_update_battery(struct pmic p, struct pmic bat)
	48	{
	49	struct power_battery *pb = bat->pbat;
	50	int ret;
	51
	52	if (pmic_probe(p)) {
	53	puts("Can't find max77693 fuel gauge\n");
505cf475	54	return -ENODEV;
04750447 PW	55	}
	56
	57	ret = max77693_get_soc(&pb->bat->state_of_chrg);
	58	if (ret)
	59	return ret;
	60
	61	max77693_get_vcell(&pb->bat->voltage_uV);
04750447 PW	62
	63	return 0;
	64	}
	65
	66	static int power_check_battery(struct pmic p, struct pmic bat)
	67	{
	68	struct power_battery *pb = bat->pbat;
	69	unsigned int val;
	70	int ret = 0;
	71
	72	if (pmic_probe(p)) {
	73	puts("Can't find max77693 fuel gauge\n");
505cf475	74	return -ENODEV;
04750447 PW	75	}
	76
	77	ret = pmic_reg_read(p, MAX77693_STATUS, &val);
	78	if (ret)
	79	return ret;
	80	debug("fg status: 0x%x\n", val);
	81
	82	ret = pmic_reg_read(p, MAX77693_VERSION, &pb->bat->version);
	83	if (ret)
	84	return ret;
	85
	86	ret = power_update_battery(p, bat);
	87	if (ret)
	88	return ret;
	89	debug("fg ver: 0x%x\n", pb->bat->version);
	90	printf("BAT: state_of_charge(SOC):%d%%\n",
	91	pb->bat->state_of_chrg);
	92
	93	printf(" voltage: %d.%6.6d [V] (expected to be %d [mAh])\n",
	94	pb->bat->voltage_uV / 1000000,
	95	pb->bat->voltage_uV % 1000000,
	96	pb->bat->capacity);
	97
	98	if (pb->bat->voltage_uV > 3850000)
	99	pb->bat->state = EXT_SOURCE;
	100	else if (pb->bat->voltage_uV < 3600000 \|\| pb->bat->state_of_chrg < 5)
	101	pb->bat->state = CHARGE;
	102	else
	103	pb->bat->state = NORMAL;
	104
	105	return 0;
	106	}
	107
	108	static struct power_fg power_fg_ops = {
	109	.fg_battery_check = power_check_battery,
	110	.fg_battery_update = power_update_battery,
	111	};
	112
	113	int power_fg_init(unsigned char bus)
	114	{
	115	static const char name[] = "MAX77693_FG";
	116	struct pmic *p = pmic_alloc();
	117
	118	if (!p) {
	119	printf("%s: POWER allocation error!\n", __func__);
	120	return -ENOMEM;
	121	}
	122
	123	debug("Board Fuel Gauge init\n");
	124
	125	p->name = name;
	126	p->interface = PMIC_I2C;
	127	p->number_of_regs = FG_NUM_OF_REGS;
	128	p->hw.i2c.addr = MAX77693_FUEL_I2C_ADDR;
	129	p->hw.i2c.tx_num = 2;
	130	p->sensor_byte_order = PMIC_SENSOR_BYTE_ORDER_BIG;
	131	p->bus = bus;
	132
	133	p->fg = &power_fg_ops;
	134
	135	return 0;
	136	}