drivers/power/axp818.c

   1 /*
   2  * AXP818 driver based on AXP221 driver
   3  *
   4  *
   5  * (C) Copyright 2015 Vishnu Patekar <vishnuptekar0510@gmail.com>
   6  *
   7  * Based on axp221.c
   8  * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
   9  * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
  10  *
  11  * SPDX-License-Identifier:     GPL-2.0+
  12  */
  13
  14 #include <common.h>
  15 #include <errno.h>
  16 #include <asm/arch/gpio.h>
  17 #include <asm/arch/pmic_bus.h>
  18 #include <axp_pmic.h>
  19
  20 static u8 axp818_mvolt_to_cfg(int mvolt, int min, int max, int div)
  21 {
  22         if (mvolt < min)
  23                 mvolt = min;
  24         else if (mvolt > max)
  25                 mvolt = max;
  26
  27         return  (mvolt - min) / div;
  28 }
  29
  30 int axp_set_dcdc1(unsigned int mvolt)
  31 {
  32         int ret;
  33         u8 cfg = axp818_mvolt_to_cfg(mvolt, 1600, 3400, 100);
  34
  35         if (mvolt == 0)
  36                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
  37                                         AXP818_OUTPUT_CTRL1_DCDC1_EN);
  38
  39         ret = pmic_bus_write(AXP818_DCDC1_CTRL, cfg);
  40         if (ret)
  41                 return ret;
  42
  43         return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
  44                                 AXP818_OUTPUT_CTRL1_DCDC1_EN);
  45 }
  46
  47 int axp_set_dcdc2(unsigned int mvolt)
  48 {
  49         int ret;
  50         u8 cfg;
  51
  52         if (mvolt >= 1220)
  53                 cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20);
  54         else
  55                 cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10);
  56
  57         if (mvolt == 0)
  58                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
  59                                         AXP818_OUTPUT_CTRL1_DCDC2_EN);
  60
  61         ret = pmic_bus_write(AXP818_DCDC2_CTRL, cfg);
  62         if (ret)
  63                 return ret;
  64
  65         return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
  66                                 AXP818_OUTPUT_CTRL1_DCDC2_EN);
  67 }
  68
  69 int axp_set_dcdc3(unsigned int mvolt)
  70 {
  71         int ret;
  72         u8 cfg;
  73
  74         if (mvolt >= 1220)
  75                 cfg = 70 + axp818_mvolt_to_cfg(mvolt, 1220, 1300, 20);
  76         else
  77                 cfg = axp818_mvolt_to_cfg(mvolt, 500, 1200, 10);
  78
  79         if (mvolt == 0)
  80                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
  81                                         AXP818_OUTPUT_CTRL1_DCDC3_EN);
  82
  83         ret = pmic_bus_write(AXP818_DCDC3_CTRL, cfg);
  84         if (ret)
  85                 return ret;
  86
  87         return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
  88                                 AXP818_OUTPUT_CTRL1_DCDC3_EN);
  89 }
  90
  91 int axp_set_dcdc5(unsigned int mvolt)
  92 {
  93         int ret;
  94         u8 cfg;
  95
  96         if (mvolt >= 1140)
  97                 cfg = 32 + axp818_mvolt_to_cfg(mvolt, 1140, 1840, 20);
  98         else
  99                 cfg = axp818_mvolt_to_cfg(mvolt, 800, 1120, 10);
 100
 101         if (mvolt == 0)
 102                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL1,
 103                                         AXP818_OUTPUT_CTRL1_DCDC5_EN);
 104
 105         ret = pmic_bus_write(AXP818_DCDC5_CTRL, cfg);
 106         if (ret)
 107                 return ret;
 108
 109         return pmic_bus_setbits(AXP818_OUTPUT_CTRL1,
 110                                 AXP818_OUTPUT_CTRL1_DCDC5_EN);
 111 }
 112
 113 int axp_set_aldo(int aldo_num, unsigned int mvolt)
 114 {
 115         int ret;
 116         u8 cfg;
 117
 118         if (aldo_num < 1 || aldo_num > 3)
 119                 return -EINVAL;
 120
 121         if (mvolt == 0)
 122                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL3,
 123                                 AXP818_OUTPUT_CTRL3_ALDO1_EN << (aldo_num - 1));
 124
 125         cfg = axp818_mvolt_to_cfg(mvolt, 700, 3300, 100);
 126         ret = pmic_bus_write(AXP818_ALDO1_CTRL + (aldo_num - 1), cfg);
 127         if (ret)
 128                 return ret;
 129
 130         return pmic_bus_setbits(AXP818_OUTPUT_CTRL3,
 131                                 AXP818_OUTPUT_CTRL3_ALDO1_EN << (aldo_num - 1));
 132 }
 133
 134 /* TODO: re-work other AXP drivers to consolidate ALDO functions. */
 135 int axp_set_aldo1(unsigned int mvolt)
 136 {
 137         return axp_set_aldo(1, mvolt);
 138 }
 139
 140 int axp_set_aldo2(unsigned int mvolt)
 141 {
 142         return axp_set_aldo(2, mvolt);
 143 }
 144
 145 int axp_set_aldo3(unsigned int mvolt)
 146 {
 147         return axp_set_aldo(3, mvolt);
 148 }
 149
 150 int axp_set_dldo(int dldo_num, unsigned int mvolt)
 151 {
 152         int ret;
 153         u8 cfg;
 154
 155         if (dldo_num < 1 || dldo_num > 4)
 156                 return -EINVAL;
 157
 158         if (mvolt == 0)
 159                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
 160                                 AXP818_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
 161
 162         cfg = axp818_mvolt_to_cfg(mvolt, 700, 3300, 100);
 163         if (dldo_num == 2 && mvolt > 3300)
 164                 cfg += 1 + axp818_mvolt_to_cfg(mvolt, 3400, 4200, 200);
 165         ret = pmic_bus_write(AXP818_ELDO1_CTRL + (dldo_num - 1), cfg);
 166         if (ret)
 167                 return ret;
 168
 169         return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
 170                                 AXP818_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
 171 }
 172
 173 int axp_set_eldo(int eldo_num, unsigned int mvolt)
 174 {
 175         int ret;
 176         u8 cfg;
 177
 178         if (eldo_num < 1 || eldo_num > 3)
 179                 return -EINVAL;
 180
 181         if (mvolt == 0)
 182                 return pmic_bus_clrbits(AXP818_OUTPUT_CTRL2,
 183                                 AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
 184
 185         cfg = axp818_mvolt_to_cfg(mvolt, 700, 1900, 50);
 186         ret = pmic_bus_write(AXP818_ELDO1_CTRL + (eldo_num - 1), cfg);
 187         if (ret)
 188                 return ret;
 189
 190         return pmic_bus_setbits(AXP818_OUTPUT_CTRL2,
 191                                 AXP818_OUTPUT_CTRL2_ELDO1_EN << (eldo_num - 1));
 192 }
 193
 194 int axp_init(void)
 195 {
 196         u8 axp_chip_id;
 197         int ret;
 198
 199         ret = pmic_bus_init();
 200         if (ret)
 201                 return ret;
 202
 203         ret = pmic_bus_read(AXP818_CHIP_ID, &axp_chip_id);
 204         if (ret)
 205                 return ret;
 206
 207         if (!(axp_chip_id == 0x51))
 208                 return -ENODEV;
 209         else
 210                 return ret;
 211
 212         return 0;
 213 }