pmic.c 4.6 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 <errno.h>
  8. #include <dm.h>
  9. #include <dm/uclass-internal.h>
  10. #include <power/pmic.h>
  11. #define LIMIT_DEV 32
  12. #define LIMIT_PARENT 20
  13. static struct udevice *currdev;
  14. static int failure(int ret)
  15. {
  16. printf("Error: %d (%s)\n", ret, errno_str(ret));
  17. return CMD_RET_FAILURE;
  18. }
  19. static int do_dev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  20. {
  21. char *name;
  22. int ret = -ENODEV;
  23. switch (argc) {
  24. case 2:
  25. name = argv[1];
  26. ret = pmic_get(name, &currdev);
  27. if (ret) {
  28. printf("Can't get PMIC: %s!\n", name);
  29. return failure(ret);
  30. }
  31. case 1:
  32. if (!currdev) {
  33. printf("PMIC device is not set!\n\n");
  34. return CMD_RET_USAGE;
  35. }
  36. printf("dev: %d @ %s\n", currdev->seq, currdev->name);
  37. }
  38. return CMD_RET_SUCCESS;
  39. }
  40. static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  41. {
  42. struct udevice *dev;
  43. int ret;
  44. printf("| %-*.*s| %-*.*s| %s @ %s\n",
  45. LIMIT_DEV, LIMIT_DEV, "Name",
  46. LIMIT_PARENT, LIMIT_PARENT, "Parent name",
  47. "Parent uclass", "seq");
  48. for (ret = uclass_first_device(UCLASS_PMIC, &dev); dev;
  49. ret = uclass_next_device(&dev)) {
  50. if (ret)
  51. continue;
  52. printf("| %-*.*s| %-*.*s| %s @ %d\n",
  53. LIMIT_DEV, LIMIT_DEV, dev->name,
  54. LIMIT_PARENT, LIMIT_PARENT, dev->parent->name,
  55. dev_get_uclass_name(dev->parent), dev->parent->seq);
  56. }
  57. if (ret)
  58. return CMD_RET_FAILURE;
  59. return CMD_RET_SUCCESS;
  60. }
  61. static int do_dump(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  62. {
  63. struct uc_pmic_priv *priv;
  64. struct udevice *dev;
  65. char fmt[16];
  66. uint reg;
  67. int ret;
  68. if (!currdev) {
  69. printf("First, set the PMIC device!\n");
  70. return CMD_RET_USAGE;
  71. }
  72. dev = currdev;
  73. priv = dev_get_uclass_priv(dev);
  74. printf("Dump pmic: %s registers\n", dev->name);
  75. sprintf(fmt, "%%%d.%dx ", priv->trans_len * 2,
  76. priv->trans_len * 2);
  77. for (reg = 0; reg < pmic_reg_count(dev); reg++) {
  78. ret = pmic_reg_read(dev, reg);
  79. if (ret < 0 && ret != -ENODATA) {
  80. printf("Can't read register: %d\n", reg);
  81. return failure(ret);
  82. }
  83. if (!(reg % 16))
  84. printf("\n0x%02x: ", reg);
  85. if (ret == -ENODATA) {
  86. int i;
  87. for (i = 0; i < priv->trans_len; i++)
  88. puts("--");
  89. puts(" ");
  90. } else {
  91. printf(fmt, ret);
  92. }
  93. }
  94. printf("\n");
  95. return CMD_RET_SUCCESS;
  96. }
  97. static int do_read(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  98. {
  99. struct uc_pmic_priv *priv;
  100. struct udevice *dev;
  101. int regs, ret;
  102. char fmt[24];
  103. uint reg;
  104. if (!currdev) {
  105. printf("First, set the PMIC device!\n");
  106. return CMD_RET_USAGE;
  107. }
  108. dev = currdev;
  109. priv = dev_get_uclass_priv(dev);
  110. if (argc != 2)
  111. return CMD_RET_USAGE;
  112. reg = simple_strtoul(argv[1], NULL, 0);
  113. regs = pmic_reg_count(dev);
  114. if (reg > regs) {
  115. printf("PMIC max reg: %d\n", regs);
  116. return failure(-EFAULT);
  117. }
  118. ret = pmic_reg_read(dev, reg);
  119. if (ret < 0) {
  120. printf("Can't read PMIC register: %d!\n", reg);
  121. return failure(ret);
  122. }
  123. sprintf(fmt, "0x%%02x: 0x%%%d.%dx\n", priv->trans_len * 2,
  124. priv->trans_len * 2);
  125. printf(fmt, reg, ret);
  126. return CMD_RET_SUCCESS;
  127. }
  128. static int do_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  129. {
  130. struct udevice *dev;
  131. uint reg, value;
  132. int regs, ret;
  133. if (!currdev) {
  134. printf("First, set the PMIC device!\n");
  135. return CMD_RET_USAGE;
  136. }
  137. dev = currdev;
  138. if (argc != 3)
  139. return CMD_RET_USAGE;
  140. reg = simple_strtoul(argv[1], NULL, 0);
  141. regs = pmic_reg_count(dev);
  142. if (reg > regs) {
  143. printf("PMIC max reg: %d\n", regs);
  144. return failure(-EFAULT);
  145. }
  146. value = simple_strtoul(argv[2], NULL, 0);
  147. ret = pmic_reg_write(dev, reg, value);
  148. if (ret) {
  149. printf("Can't write PMIC register: %d!\n", reg);
  150. return failure(ret);
  151. }
  152. return CMD_RET_SUCCESS;
  153. }
  154. static cmd_tbl_t subcmd[] = {
  155. U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
  156. U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
  157. U_BOOT_CMD_MKENT(dump, 1, 1, do_dump, "", ""),
  158. U_BOOT_CMD_MKENT(read, 2, 1, do_read, "", ""),
  159. U_BOOT_CMD_MKENT(write, 3, 1, do_write, "", ""),
  160. };
  161. static int do_pmic(cmd_tbl_t *cmdtp, int flag, int argc,
  162. char * const argv[])
  163. {
  164. cmd_tbl_t *cmd;
  165. argc--;
  166. argv++;
  167. cmd = find_cmd_tbl(argv[0], subcmd, ARRAY_SIZE(subcmd));
  168. if (cmd == NULL || argc > cmd->maxargs)
  169. return CMD_RET_USAGE;
  170. return cmd->cmd(cmdtp, flag, argc, argv);
  171. }
  172. U_BOOT_CMD(pmic, CONFIG_SYS_MAXARGS, 1, do_pmic,
  173. "PMIC sub-system",
  174. "list - list pmic devices\n"
  175. "pmic dev [name] - show or [set] operating PMIC device\n"
  176. "pmic dump - dump registers\n"
  177. "pmic read address - read byte of register at address\n"
  178. "pmic write address - write byte to register at address\n"
  179. );