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