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Viewing changes to roms/u-boot/drivers/power/mfd/pmic_max77693.c

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/u-boot/drivers/power/mfd/pmic_max77693.c
 
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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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 * SPDX-License-Identifier:     GPL-2.0+
 
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 */
 
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#include <common.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 -1;
 
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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 == 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 -1;
 
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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 -1;
 
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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 -1;
 
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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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}