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/*
* 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_pmic.h>
#include <i2c.h>
#include <errno.h>
static int max77693_charger_state(struct pmic *p, int state, int current)
{
unsigned int val;
if (pmic_probe(p))
return -ENODEV;
/* unlock write capability */
val = MAX77693_CHG_UNLOCK;
pmic_reg_write(p, MAX77693_CHG_CNFG_06, val);
if (state == PMIC_CHARGER_DISABLE) {
puts("Disable the charger.\n");
pmic_reg_read(p, MAX77693_CHG_CNFG_00, &val);
val &= ~0x01;
pmic_reg_write(p, MAX77693_CHG_CNFG_00, val);
return -ENOTSUPP;
}
if (current < CHARGER_MIN_CURRENT || current > CHARGER_MAX_CURRENT) {
printf("%s: Wrong charge current: %d [mA]\n",
__func__, current);
return -EINVAL;
}
/* set charging current */
pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val);
val &= ~MAX77693_CHG_CC;
val |= current * 10 / 333; /* 0.1A/3 steps */
pmic_reg_write(p, MAX77693_CHG_CNFG_02, val);
/* enable charging */
val = MAX77693_CHG_MODE_ON;
pmic_reg_write(p, MAX77693_CHG_CNFG_00, val);
/* check charging current */
pmic_reg_read(p, MAX77693_CHG_CNFG_02, &val);
val &= 0x3f;
printf("Enable the charger @ %d [mA]\n", val * 333 / 10);
return 0;
}
static int max77693_charger_bat_present(struct pmic *p)
{
unsigned int val;
if (pmic_probe(p))
return -ENODEV;
pmic_reg_read(p, MAX77693_CHG_INT_OK, &val);
return !(val & MAX77693_CHG_DETBAT);
}
static struct power_chrg power_chrg_pmic_ops = {
.chrg_bat_present = max77693_charger_bat_present,
.chrg_state = max77693_charger_state,
};
int pmic_init_max77693(unsigned char bus)
{
static const char name[] = "MAX77693_PMIC";
struct pmic *p = pmic_alloc();
if (!p) {
printf("%s: POWER allocation error!\n", __func__);
return -ENOMEM;
}
debug("Board PMIC init\n");
p->name = name;
p->interface = PMIC_I2C;
p->number_of_regs = PMIC_NUM_OF_REGS;
p->hw.i2c.addr = MAX77693_PMIC_I2C_ADDR;
p->hw.i2c.tx_num = 1;
p->bus = bus;
p->chrg = &power_chrg_pmic_ops;
return 0;
}
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