drivers/power/axp221.c

   1 /*
   2  * AXP221 and AXP223 driver
   3  *
   4  * IMPORTANT when making changes to this file check that the registers
   5  * used are the same for the axp221 and axp223.
   6  *
   7  * (C) Copyright 2014 Hans de Goede <hdegoede@redhat.com>
   8  * (C) Copyright 2013 Oliver Schinagl <oliver@schinagl.nl>
   9  *
  10  * SPDX-License-Identifier:     GPL-2.0+
  11  */
  12
  13 #include <common.h>
  14 #include <command.h>
  15 #include <errno.h>
  16 #include <asm/arch/pmic_bus.h>
  17 #include <axp_pmic.h>
  18
  19 static u8 axp221_mvolt_to_cfg(int mvolt, int min, int max, int div)
  20 {
  21         if (mvolt < min)
  22                 mvolt = min;
  23         else if (mvolt > max)
  24                 mvolt = max;
  25
  26         return (mvolt - min) / div;
  27 }
  28
  29 int axp_set_dcdc1(unsigned int mvolt)
  30 {
  31         int ret;
  32         u8 cfg = axp221_mvolt_to_cfg(mvolt, 1600, 3400, 100);
  33
  34         if (mvolt == 0)
  35                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
  36                                         AXP221_OUTPUT_CTRL1_DCDC1_EN);
  37
  38         ret = pmic_bus_write(AXP221_DCDC1_CTRL, cfg);
  39         if (ret)
  40                 return ret;
  41
  42         ret = pmic_bus_setbits(AXP221_OUTPUT_CTRL2,
  43                                AXP221_OUTPUT_CTRL2_DCDC1SW_EN);
  44         if (ret)
  45                 return ret;
  46
  47         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
  48                                 AXP221_OUTPUT_CTRL1_DCDC1_EN);
  49 }
  50
  51 int axp_set_dcdc2(unsigned int mvolt)
  52 {
  53         int ret;
  54         u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
  55
  56         if (mvolt == 0)
  57                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
  58                                         AXP221_OUTPUT_CTRL1_DCDC2_EN);
  59
  60         ret = pmic_bus_write(AXP221_DCDC2_CTRL, cfg);
  61         if (ret)
  62                 return ret;
  63
  64         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
  65                                 AXP221_OUTPUT_CTRL1_DCDC2_EN);
  66 }
  67
  68 int axp_set_dcdc3(unsigned int mvolt)
  69 {
  70         int ret;
  71         u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1860, 20);
  72
  73         if (mvolt == 0)
  74                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
  75                                         AXP221_OUTPUT_CTRL1_DCDC3_EN);
  76
  77         ret = pmic_bus_write(AXP221_DCDC3_CTRL, cfg);
  78         if (ret)
  79                 return ret;
  80
  81         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
  82                                 AXP221_OUTPUT_CTRL1_DCDC3_EN);
  83 }
  84
  85 int axp_set_dcdc4(unsigned int mvolt)
  86 {
  87         int ret;
  88         u8 cfg = axp221_mvolt_to_cfg(mvolt, 600, 1540, 20);
  89
  90         if (mvolt == 0)
  91                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
  92                                         AXP221_OUTPUT_CTRL1_DCDC4_EN);
  93
  94         ret = pmic_bus_write(AXP221_DCDC4_CTRL, cfg);
  95         if (ret)
  96                 return ret;
  97
  98         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
  99                                 AXP221_OUTPUT_CTRL1_DCDC4_EN);
 100 }
 101
 102 int axp_set_dcdc5(unsigned int mvolt)
 103 {
 104         int ret;
 105         u8 cfg = axp221_mvolt_to_cfg(mvolt, 1000, 2550, 50);
 106
 107         if (mvolt == 0)
 108                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
 109                                         AXP221_OUTPUT_CTRL1_DCDC5_EN);
 110
 111         ret = pmic_bus_write(AXP221_DCDC5_CTRL, cfg);
 112         if (ret)
 113                 return ret;
 114
 115         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
 116                                 AXP221_OUTPUT_CTRL1_DCDC5_EN);
 117 }
 118
 119 int axp_set_aldo1(unsigned int mvolt)
 120 {
 121         int ret;
 122         u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 123
 124         if (mvolt == 0)
 125                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
 126                                         AXP221_OUTPUT_CTRL1_ALDO1_EN);
 127
 128         ret = pmic_bus_write(AXP221_ALDO1_CTRL, cfg);
 129         if (ret)
 130                 return ret;
 131
 132         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
 133                                 AXP221_OUTPUT_CTRL1_ALDO1_EN);
 134 }
 135
 136 int axp_set_aldo2(unsigned int mvolt)
 137 {
 138         int ret;
 139         u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 140
 141         if (mvolt == 0)
 142                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL1,
 143                                         AXP221_OUTPUT_CTRL1_ALDO2_EN);
 144
 145         ret = pmic_bus_write(AXP221_ALDO2_CTRL, cfg);
 146         if (ret)
 147                 return ret;
 148
 149         return pmic_bus_setbits(AXP221_OUTPUT_CTRL1,
 150                                 AXP221_OUTPUT_CTRL1_ALDO2_EN);
 151 }
 152
 153 int axp_set_aldo3(unsigned int mvolt)
 154 {
 155         int ret;
 156         u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 157
 158         if (mvolt == 0)
 159                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL3,
 160                                         AXP221_OUTPUT_CTRL3_ALDO3_EN);
 161
 162         ret = pmic_bus_write(AXP221_ALDO3_CTRL, cfg);
 163         if (ret)
 164                 return ret;
 165
 166         return pmic_bus_setbits(AXP221_OUTPUT_CTRL3,
 167                                 AXP221_OUTPUT_CTRL3_ALDO3_EN);
 168 }
 169
 170 int axp_set_dldo(int dldo_num, unsigned int mvolt)
 171 {
 172         u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 173         int ret;
 174
 175         if (dldo_num < 1 || dldo_num > 4)
 176                 return -EINVAL;
 177
 178         if (mvolt == 0)
 179                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL2,
 180                                 AXP221_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
 181
 182         ret = pmic_bus_write(AXP221_DLDO1_CTRL + (dldo_num - 1), cfg);
 183         if (ret)
 184                 return ret;
 185
 186         return pmic_bus_setbits(AXP221_OUTPUT_CTRL2,
 187                                 AXP221_OUTPUT_CTRL2_DLDO1_EN << (dldo_num - 1));
 188 }
 189
 190 int axp_set_eldo(int eldo_num, unsigned int mvolt)
 191 {
 192         int ret;
 193         u8 cfg = axp221_mvolt_to_cfg(mvolt, 700, 3300, 100);
 194         u8 addr, bits;
 195
 196         switch (eldo_num) {
 197         case 3:
 198                 addr = AXP221_ELDO3_CTRL;
 199                 bits = AXP221_OUTPUT_CTRL2_ELDO3_EN;
 200                 break;
 201         case 2:
 202                 addr = AXP221_ELDO2_CTRL;
 203                 bits = AXP221_OUTPUT_CTRL2_ELDO2_EN;
 204                 break;
 205         case 1:
 206                 addr = AXP221_ELDO1_CTRL;
 207                 bits = AXP221_OUTPUT_CTRL2_ELDO1_EN;
 208                 break;
 209         default:
 210                 return -EINVAL;
 211         }
 212
 213         if (mvolt == 0)
 214                 return pmic_bus_clrbits(AXP221_OUTPUT_CTRL2, bits);
 215
 216         ret = pmic_bus_write(addr, cfg);
 217         if (ret)
 218                 return ret;
 219
 220         return pmic_bus_setbits(AXP221_OUTPUT_CTRL2, bits);
 221 }
 222
 223 int axp_init(void)
 224 {
 225         u8 axp_chip_id;
 226         int ret;
 227
 228         ret = pmic_bus_init();
 229         if (ret)
 230                 return ret;
 231
 232         ret = pmic_bus_read(AXP221_CHIP_ID, &axp_chip_id);
 233         if (ret)
 234                 return ret;
 235
 236         if (!(axp_chip_id == 0x6 || axp_chip_id == 0x7 || axp_chip_id == 0x17))
 237                 return -ENODEV;
 238
 239         return 0;
 240 }
 241
 242 int axp_get_sid(unsigned int *sid)
 243 {
 244         u8 *dest = (u8 *)sid;
 245         int i, ret;
 246
 247         ret = pmic_bus_init();
 248         if (ret)
 249                 return ret;
 250
 251         ret = pmic_bus_write(AXP221_PAGE, 1);
 252         if (ret)
 253                 return ret;
 254
 255         for (i = 0; i < 16; i++) {
 256                 ret = pmic_bus_read(AXP221_SID + i, &dest[i]);
 257                 if (ret)
 258                         return ret;
 259         }
 260
 261         pmic_bus_write(AXP221_PAGE, 0);
 262
 263         for (i = 0; i < 4; i++)
 264                 sid[i] = be32_to_cpu(sid[i]);
 265
 266         return 0;
 267 }
 268
 269 int do_poweroff(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 270 {
 271         pmic_bus_write(AXP221_SHUTDOWN, AXP221_SHUTDOWN_POWEROFF);
 272
 273         /* infinite loop during shutdown */
 274         while (1) {}
 275
 276         /* not reached */
 277         return 0;
 278 }