cmd/pmic.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2014-2015 Samsung Electronics
   4  * Przemyslaw Marczak <p.marczak@samsung.com>
   5  */
   6 #include <common.h>
   7 #include <errno.h>
   8 #include <dm.h>
   9 #include <dm/uclass-internal.h>
  10 #include <power/pmic.h>
  11
  12 #define LIMIT_DEV       32
  13 #define LIMIT_PARENT    20
  14
  15 static struct udevice *currdev;
  16
  17 static int failure(int ret)
  18 {
  19         printf("Error: %d (%s)\n", ret, errno_str(ret));
  20
  21         return CMD_RET_FAILURE;
  22 }
  23
  24 static int do_dev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  25 {
  26         char *name;
  27         int ret = -ENODEV;
  28
  29         switch (argc) {
  30         case 2:
  31                 name = argv[1];
  32                 ret = pmic_get(name, &currdev);
  33                 if (ret) {
  34                         printf("Can't get PMIC: %s!\n", name);
  35                         return failure(ret);
  36                 }
  37         case 1:
  38                 if (!currdev) {
  39                         printf("PMIC device is not set!\n\n");
  40                         return CMD_RET_USAGE;
  41                 }
  42
  43                 printf("dev: %d @ %s\n", currdev->seq, currdev->name);
  44         }
  45
  46         return CMD_RET_SUCCESS;
  47 }
  48
  49 static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  50 {
  51         struct udevice *dev;
  52         int ret;
  53
  54         printf("| %-*.*s| %-*.*s| %s @ %s\n",
  55                LIMIT_DEV, LIMIT_DEV, "Name",
  56                LIMIT_PARENT, LIMIT_PARENT, "Parent name",
  57                "Parent uclass", "seq");
  58
  59         for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev;
  60              ret = uclass_next_device(&dev)) {
  61                 if (ret)
  62                         continue;
  63
  64                 printf("| %-*.*s| %-*.*s| %s @ %d\n",
  65                        LIMIT_DEV, LIMIT_DEV, dev->name,
  66                        LIMIT_PARENT, LIMIT_PARENT, dev->parent->name,
  67                        dev_get_uclass_name(dev->parent), dev->parent->seq);
  68         }
  69
  70         if (ret)
  71                 return CMD_RET_FAILURE;
  72
  73         return CMD_RET_SUCCESS;
  74 }
  75
  76 static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  77 {
  78         struct udevice *dev;
  79         uint8_t value;
  80         uint reg;
  81         int ret;
  82
  83         if (!currdev) {
  84                 printf("First, set the PMIC device!\n");
  85                 return CMD_RET_USAGE;
  86         }
  87
  88         dev = currdev;
  89
  90         printf("Dump pmic: %s registers\n", dev->name);
  91
  92         for (reg = 0; reg < pmic_reg_count(dev); reg++) {
  93                 ret = pmic_read(dev, reg, &value, 1);
  94                 if (ret) {
  95                         printf("Can't read register: %d\n", reg);
  96                         return failure(ret);
  97                 }
  98
  99                 if (!(reg % 16))
 100                         printf("\n0x%02x: ", reg);
 101
 102                 printf("%2.2x ", value);
 103         }
 104         printf("\n");
 105
 106         return CMD_RET_SUCCESS;
 107 }
 108
 109 static int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 110 {
 111         struct udevice *dev;
 112         int regs, ret;
 113         uint8_t value;
 114         uint reg;
 115
 116         if (!currdev) {
 117                 printf("First, set the PMIC device!\n");
 118                 return CMD_RET_USAGE;
 119         }
 120
 121         dev = currdev;
 122
 123         if (argc != 2)
 124                 return CMD_RET_USAGE;
 125
 126         reg = simple_strtoul(argv[1], NULL, 0);
 127         regs = pmic_reg_count(dev);
 128         if (reg > regs) {
 129                 printf("PMIC max reg: %d\n", regs);
 130                 return failure(-EFAULT);
 131         }
 132
 133         ret = pmic_read(dev, reg, &value, 1);
 134         if (ret) {
 135                 printf("Can't read PMIC register: %d!\n", reg);
 136                 return failure(ret);
 137         }
 138
 139         printf("0x%02x: 0x%2.2x\n", reg, value);
 140
 141         return CMD_RET_SUCCESS;
 142 }
 143
 144 static int do_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 145 {
 146         struct udevice *dev;
 147         int regs, ret;
 148         uint8_t value;
 149         uint reg;
 150
 151         if (!currdev) {
 152                 printf("First, set the PMIC device!\n");
 153                 return CMD_RET_USAGE;
 154         }
 155
 156         dev = currdev;
 157
 158         if (argc != 3)
 159                 return CMD_RET_USAGE;
 160
 161         reg = simple_strtoul(argv[1], NULL, 0);
 162         regs = pmic_reg_count(dev);
 163         if (reg > regs) {
 164                 printf("PMIC max reg: %d\n", regs);
 165                 return failure(-EFAULT);
 166         }
 167
 168         value = simple_strtoul(argv[2], NULL, 0);
 169
 170         ret = pmic_write(dev, reg, &value, 1);
 171         if (ret) {
 172                 printf("Can't write PMIC register: %d!\n", reg);
 173                 return failure(ret);
 174         }
 175
 176         return CMD_RET_SUCCESS;
 177 }
 178
 179 static cmd_tbl_t subcmd[] = {
 180         U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
 181         U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
 182         U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""),
 183         U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""),
 184         U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""),
 185 };
 186
 187 static int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc,
 188                         char * const argv[])
 189 {
 190         cmd_tbl_t *cmd;
 191
 192         argc--;
 193         argv++;
 194
 195         cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd));
 196         if (cmd == NULL || argc > cmd->maxargs)
 197                 return CMD_RET_USAGE;
 198
 199         return cmd->cmd(cmdtp, flag, argc, argv);
 200 }
 201
 202 U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
 203         "PMIC sub-system",
 204         "list          - list pmic devices\n"
 205         "pmic dev [name]    - show or [set] operating PMIC device\n"
 206         "pmic dump          - dump registers\n"
 207         "pmic read address  - read byte of register at address\n"
 208         "pmic write address - write byte to register at address\n"
 209 );