pmic.c 4.7 KB

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