mirror of
https://github.com/AsahiLinux/u-boot
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107 lines
2.3 KiB
C
107 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2012 Samsung Electronics
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* Lukasz Majewski <l.majewski@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/max8997_pmic.h>
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#include <i2c.h>
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#include <errno.h>
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unsigned char max8997_reg_ldo(int uV)
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{
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unsigned char ret;
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if (uV <= 800000)
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return 0;
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if (uV >= 3950000)
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return MAX8997_LDO_MAX_VAL;
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ret = (uV - 800000) / 50000;
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if (ret > MAX8997_LDO_MAX_VAL) {
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printf("MAX8997 LDO SETTING ERROR (%duV) -> %u\n", uV, ret);
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ret = MAX8997_LDO_MAX_VAL;
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}
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return ret;
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}
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static int pmic_charger_state(struct pmic *p, int state, int current)
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{
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unsigned char fc;
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u32 val = 0;
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if (pmic_probe(p))
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return -ENODEV;
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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, MAX8997_REG_MBCCTRL2, &val);
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val &= ~(MBCHOSTEN | VCHGR_FC);
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pmic_reg_write(p, MAX8997_REG_MBCCTRL2, 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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fc = (current - CHARGER_MIN_CURRENT) / CHARGER_CURRENT_RESOLUTION;
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fc = fc & 0xf; /* up to 950 mA */
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printf("Enable the charger @ %d [mA]\n", fc * CHARGER_CURRENT_RESOLUTION
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+ CHARGER_MIN_CURRENT);
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val = fc | MBCICHFCSET;
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pmic_reg_write(p, MAX8997_REG_MBCCTRL4, val);
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pmic_reg_read(p, MAX8997_REG_MBCCTRL2, &val);
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val = MBCHOSTEN | VCHGR_FC; /* enable charger & fast charge */
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pmic_reg_write(p, MAX8997_REG_MBCCTRL2, val);
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return 0;
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}
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static int pmic_charger_bat_present(struct pmic *p)
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{
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u32 val;
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if (pmic_probe(p))
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return -ENODEV;
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pmic_reg_read(p, MAX8997_REG_STATUS4, &val);
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return !(val & DETBAT);
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}
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static struct power_chrg power_chrg_pmic_ops = {
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.chrg_bat_present = pmic_charger_bat_present,
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.chrg_state = pmic_charger_state,
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};
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int pmic_init(unsigned char bus)
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{
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static const char name[] = "MAX8997_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 = MAX8997_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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