drivers/power/pmic/muic_max8997.c

   1 /*
   2  *  Copyright (C) 2012 Samsung Electronics
   3  *  Lukasz Majewski <l.majewski@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/max8997_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 char charge_type, charger;
  19
  20         if (pmic_probe(p))
  21                 return CHARGER_NO;
  22
  23         pmic_reg_read(p, MAX8997_MUIC_STATUS2, &val);
  24         charge_type = val & MAX8997_MUIC_CHG_MASK;
  25
  26         switch (charge_type) {
  27         case MAX8997_MUIC_CHG_NO:
  28                 charger = CHARGER_NO;
  29                 break;
  30         case MAX8997_MUIC_CHG_USB:
  31         case MAX8997_MUIC_CHG_USB_D:
  32                 charger = CHARGER_USB;
  33                 break;
  34         case MAX8997_MUIC_CHG_TA:
  35         case MAX8997_MUIC_CHG_TA_1A:
  36                 charger = CHARGER_TA;
  37                 break;
  38         case MAX8997_MUIC_CHG_TA_500:
  39                 charger = CHARGER_TA_500;
  40                 break;
  41         default:
  42                 charger = CHARGER_UNKNOWN;
  43                 break;
  44         }
  45
  46         return charger;
  47 }
  48
  49 static struct power_chrg power_chrg_muic_ops = {
  50         .chrg_type = power_chrg_get_type,
  51 };
  52
  53 int power_muic_init(unsigned int bus)
  54 {
  55         static const char name[] = "MAX8997_MUIC";
  56         struct pmic *p = pmic_alloc();
  57
  58         if (!p) {
  59                 printf("%s: POWER allocation error!\n", __func__);
  60                 return -ENOMEM;
  61         }
  62
  63         debug("Board Micro USB Interface Controller init\n");
  64
  65         p->name = name;
  66         p->interface = PMIC_I2C;
  67         p->number_of_regs = MUIC_NUM_OF_REGS;
  68         p->hw.i2c.addr = MAX8997_MUIC_I2C_ADDR;
  69         p->hw.i2c.tx_num = 1;
  70         p->bus = bus;
  71
  72         p->chrg = &power_chrg_muic_ops;
  73         return 0;
  74 }