board/freescale/common/pfuze.c

   1 /*
   2  * Copyright 2014 Freescale Semiconductor, Inc.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <power/pmic.h>
   9 #include <power/pfuze100_pmic.h>
  10
  11 struct pmic *pfuze_common_init(unsigned char i2cbus)
  12 {
  13         struct pmic *p;
  14         int ret;
  15         unsigned int reg;
  16
  17         ret = power_pfuze100_init(i2cbus);
  18         if (ret)
  19                 return NULL;
  20
  21         p = pmic_get("PFUZE100");
  22         ret = pmic_probe(p);
  23         if (ret)
  24                 return NULL;
  25
  26         pmic_reg_read(p, PFUZE100_DEVICEID, &reg);
  27         printf("PMIC:  PFUZE100 ID=0x%02x\n", reg);
  28
  29         /* Set SW1AB stanby volage to 0.975V */
  30         pmic_reg_read(p, PFUZE100_SW1ABSTBY, &reg);
  31         reg &= ~SW1x_STBY_MASK;
  32         reg |= SW1x_0_975V;
  33         pmic_reg_write(p, PFUZE100_SW1ABSTBY, reg);
  34
  35         /* Set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
  36         pmic_reg_read(p, PUZE_100_SW1ABCONF, &reg);
  37         reg &= ~SW1xCONF_DVSSPEED_MASK;
  38         reg |= SW1xCONF_DVSSPEED_4US;
  39         pmic_reg_write(p, PUZE_100_SW1ABCONF, reg);
  40
  41         /* Set SW1C standby voltage to 0.975V */
  42         pmic_reg_read(p, PFUZE100_SW1CSTBY, &reg);
  43         reg &= ~SW1x_STBY_MASK;
  44         reg |= SW1x_0_975V;
  45         pmic_reg_write(p, PFUZE100_SW1CSTBY, reg);
  46
  47         /* Set SW1C/VDDSOC step ramp up time from 16us to 4us/25mV */
  48         pmic_reg_read(p, PFUZE100_SW1CCONF, &reg);
  49         reg &= ~SW1xCONF_DVSSPEED_MASK;
  50         reg |= SW1xCONF_DVSSPEED_4US;
  51         pmic_reg_write(p, PFUZE100_SW1CCONF, reg);
  52
  53         return p;
  54 }