drivers/power/mfd/muic_max77693.c

   1 /*
   2  * Copyright (C) 2013 Samsung Electronics
   3  * Piotr Wilczek <p.wilczek@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <power/pmic.h>
  10 #include <power/power_chrg.h>
  11 #include <power/max77693_muic.h>
  12 #include <i2c.h>
  13 #include <errno.h>
  14
  15 static int power_chrg_get_type(struct pmic *p)
  16 {
  17         unsigned int val;
  18         unsigned int charge_type, charger;
  19
  20         /* if probe failed, return cable none */
  21         if (pmic_probe(p))
  22                 return CHARGER_NO;
  23
  24         pmic_reg_read(p, MAX77693_MUIC_STATUS2, &val);
  25
  26         charge_type = val & MAX77693_MUIC_CHG_MASK;
  27
  28         switch (charge_type) {
  29         case MAX77693_MUIC_CHG_NO:
  30                 charger = CHARGER_NO;
  31                 break;
  32         case MAX77693_MUIC_CHG_USB:
  33         case MAX77693_MUIC_CHG_USB_D:
  34                 charger = CHARGER_USB;
  35                 break;
  36         case MAX77693_MUIC_CHG_TA:
  37         case MAX77693_MUIC_CHG_TA_1A:
  38                 charger = CHARGER_TA;
  39                 break;
  40         case MAX77693_MUIC_CHG_TA_500:
  41                 charger = CHARGER_TA_500;
  42                 break;
  43         default:
  44                 charger = CHARGER_UNKNOWN;
  45                 break;
  46         }
  47
  48         return charger;
  49 }
  50
  51 static struct power_chrg power_chrg_muic_ops = {
  52         .chrg_type = power_chrg_get_type,
  53 };
  54
  55 int power_muic_init(unsigned int bus)
  56 {
  57         static const char name[] = "MAX77693_MUIC";
  58         struct pmic *p = pmic_alloc();
  59
  60         if (!p) {
  61                 printf("%s: POWER allocation error!\n", __func__);
  62                 return -ENOMEM;
  63         }
  64
  65         debug("Board Micro USB Interface Controller init\n");
  66
  67         p->name = name;
  68         p->interface = PMIC_I2C;
  69         p->number_of_regs = MUIC_NUM_OF_REGS;
  70         p->hw.i2c.addr = MAX77693_MUIC_I2C_ADDR;
  71         p->hw.i2c.tx_num = 1;
  72         p->bus = bus;
  73
  74         p->chrg = &power_chrg_muic_ops;
  75
  76         return 0;
  77 }