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