drivers/power/power_core.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2011 Samsung Electronics
   4  * Lukasz Majewski <l.majewski@samsung.com>
   5  *
   6  * (C) Copyright 2010
   7  * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   8  *
   9  * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
  10  */
  11
  12 #include <common.h>
  13 #include <command.h>
  14 #include <malloc.h>
  15 #include <linux/types.h>
  16 #include <linux/list.h>
  17 #include <power/pmic.h>
  18
  19 static LIST_HEAD(pmic_list);
  20
  21 int check_reg(struct pmic *p, u32 reg)
  22 {
  23         if (reg >= p->number_of_regs) {
  24                 printf("<reg num> = %d is invalid. Should be less than %d\n",
  25                        reg, p->number_of_regs);
  26                 return -EINVAL;
  27         }
  28
  29         return 0;
  30 }
  31
  32 int pmic_set_output(struct pmic *p, u32 reg, int out, int on)
  33 {
  34         u32 val;
  35
  36         if (pmic_reg_read(p, reg, &val))
  37                 return -ENOTSUPP;
  38
  39         if (on)
  40                 val |= out;
  41         else
  42                 val &= ~out;
  43
  44         if (pmic_reg_write(p, reg, val))
  45                 return -ENOTSUPP;
  46
  47         return 0;
  48 }
  49
  50 struct pmic *pmic_alloc(void)
  51 {
  52         struct pmic *p;
  53
  54         p = calloc(sizeof(*p), 1);
  55         if (!p) {
  56                 printf("%s: No available memory for allocation!\n", __func__);
  57                 return NULL;
  58         }
  59
  60         list_add_tail(&p->list, &pmic_list);
  61
  62         debug("%s: new pmic struct: 0x%p\n", __func__, p);
  63
  64         return p;
  65 }
  66
  67 struct pmic *pmic_get(const char *s)
  68 {
  69         struct pmic *p;
  70
  71         list_for_each_entry(p, &pmic_list, list) {
  72                 if (strcmp(p->name, s) == 0) {
  73                         debug("%s: pmic %s -> 0x%p\n", __func__, p->name, p);
  74                         return p;
  75                 }
  76         }
  77
  78         return NULL;
  79 }
  80
  81 #ifndef CONFIG_SPL_BUILD
  82 static int pmic_dump(struct pmic *p)
  83 {
  84         int i, ret;
  85         u32 val;
  86
  87         if (!p) {
  88                 puts("Wrong PMIC name!\n");
  89                 return -ENODEV;
  90         }
  91
  92         printf("PMIC: %s\n", p->name);
  93         for (i = 0; i < p->number_of_regs; i++) {
  94                 ret = pmic_reg_read(p, i, &val);
  95                 if (ret)
  96                         puts("PMIC: Registers dump failed\n");
  97
  98                 if (!(i % 8))
  99                         printf("\n0x%02x: ", i);
 100
 101                 printf("%08x ", val);
 102         }
 103         puts("\n");
 104         return 0;
 105 }
 106
 107 static const char *power_get_interface(int interface)
 108 {
 109         const char *power_interface[] = {"I2C", "SPI", "|+|-|"};
 110         return power_interface[interface];
 111 }
 112
 113 static void pmic_list_names(void)
 114 {
 115         struct pmic *p;
 116
 117         puts("PMIC devices:\n");
 118         list_for_each_entry(p, &pmic_list, list) {
 119                 printf("name: %s bus: %s_%d\n", p->name,
 120                        power_get_interface(p->interface), p->bus);
 121         }
 122 }
 123
 124 static int do_pmic(struct cmd_tbl *cmdtp, int flag, int argc,
 125                    char *const argv[])
 126 {
 127         u32 ret, reg, val;
 128         char *cmd, *name;
 129         struct pmic *p;
 130
 131         /* at least two arguments please */
 132         if (argc < 2)
 133                 return CMD_RET_USAGE;
 134
 135         if (strcmp(argv[1], "list") == 0) {
 136                 pmic_list_names();
 137                 return CMD_RET_SUCCESS;
 138         }
 139
 140         if (argc < 3)
 141                 return CMD_RET_USAGE;
 142
 143         name = argv[1];
 144         cmd = argv[2];
 145
 146         debug("%s: name: %s cmd: %s\n", __func__, name, cmd);
 147         p = pmic_get(name);
 148         if (!p)
 149                 return CMD_RET_FAILURE;
 150
 151         if (strcmp(cmd, "dump") == 0) {
 152                 if (pmic_dump(p))
 153                         return CMD_RET_FAILURE;
 154                 return CMD_RET_SUCCESS;
 155         }
 156
 157         if (strcmp(cmd, "read") == 0) {
 158                 if (argc < 4)
 159                         return CMD_RET_USAGE;
 160
 161                 reg = simple_strtoul(argv[3], NULL, 16);
 162                 ret = pmic_reg_read(p, reg, &val);
 163
 164                 if (ret)
 165                         puts("PMIC: Register read failed\n");
 166
 167                 printf("\n0x%02x: 0x%08x\n", reg, val);
 168
 169                 return CMD_RET_SUCCESS;
 170         }
 171
 172         if (strcmp(cmd, "write") == 0) {
 173                 if (argc < 5)
 174                         return CMD_RET_USAGE;
 175
 176                 reg = simple_strtoul(argv[3], NULL, 16);
 177                 val = simple_strtoul(argv[4], NULL, 16);
 178                 pmic_reg_write(p, reg, val);
 179
 180                 return CMD_RET_SUCCESS;
 181         }
 182
 183         if (strcmp(cmd, "bat") == 0) {
 184                 if (argc < 4)
 185                         return CMD_RET_USAGE;
 186
 187                 if (!p->pbat) {
 188                         printf("%s is not a battery\n", p->name);
 189                         return CMD_RET_FAILURE;
 190                 }
 191
 192                 if (strcmp(argv[3], "state") == 0)
 193                         p->fg->fg_battery_check(p->pbat->fg, p);
 194
 195                 if (strcmp(argv[3], "charge") == 0) {
 196                         printf("BAT: %s charging (ctrl+c to break)\n",
 197                                p->name);
 198                         if (p->low_power_mode)
 199                                 p->low_power_mode();
 200                         if (p->pbat->battery_charge)
 201                                 p->pbat->battery_charge(p);
 202                 }
 203
 204                 return CMD_RET_SUCCESS;
 205         }
 206
 207         /* No subcommand found */
 208         return CMD_RET_SUCCESS;
 209 }
 210
 211 U_BOOT_CMD(
 212         pmic,   CONFIG_SYS_MAXARGS, 1, do_pmic,
 213         "PMIC",
 214         "list - list available PMICs\n"
 215         "pmic name dump - dump named PMIC registers\n"
 216         "pmic name read <reg> - read register\n"
 217         "pmic name write <reg> <value> - write register\n"
 218         "pmic name bat state - write register\n"
 219         "pmic name bat charge - write register\n"
 220 );
 221 #endif