adc.c 2.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2018 BayLibre, SAS
  4. * Author: Neil Armstrong <narmstrong@baylibre.com>
  5. */
  6. #include <common.h>
  7. #include <command.h>
  8. #include <dm.h>
  9. #include <adc.h>
  10. static int do_adc_list(cmd_tbl_t *cmdtp, int flag, int argc,
  11. char *const argv[])
  12. {
  13. struct udevice *dev;
  14. int ret;
  15. ret = uclass_first_device_err(UCLASS_ADC, &dev);
  16. if (ret) {
  17. printf("No available ADC device\n");
  18. return CMD_RET_FAILURE;
  19. }
  20. do {
  21. printf("- %s\n", dev->name);
  22. ret = uclass_next_device(&dev);
  23. if (ret)
  24. return CMD_RET_FAILURE;
  25. } while (dev);
  26. return CMD_RET_SUCCESS;
  27. }
  28. static int do_adc_info(cmd_tbl_t *cmdtp, int flag, int argc,
  29. char *const argv[])
  30. {
  31. struct udevice *dev;
  32. unsigned int data_mask;
  33. int ret, vss, vdd;
  34. if (argc < 2)
  35. return CMD_RET_USAGE;
  36. ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
  37. if (ret) {
  38. printf("Unknown ADC device %s\n", argv[1]);
  39. return CMD_RET_FAILURE;
  40. }
  41. printf("ADC Device '%s' :\n", argv[1]);
  42. ret = adc_data_mask(dev, &data_mask);
  43. if (!ret)
  44. printf("data mask: %x\n", data_mask);
  45. ret = adc_vdd_value(dev, &vdd);
  46. if (!ret)
  47. printf("vdd: %duV\n", vdd);
  48. ret = adc_vss_value(dev, &vss);
  49. if (!ret)
  50. printf("vss: %duV\n", vss);
  51. return CMD_RET_SUCCESS;
  52. }
  53. static int do_adc_single(cmd_tbl_t *cmdtp, int flag, int argc,
  54. char *const argv[])
  55. {
  56. unsigned int data;
  57. int ret;
  58. if (argc < 3)
  59. return CMD_RET_USAGE;
  60. ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
  61. &data);
  62. if (ret) {
  63. printf("Error getting single shot for device %s channel %s\n",
  64. argv[1], argv[2]);
  65. return CMD_RET_FAILURE;
  66. }
  67. printf("%u\n", data);
  68. return CMD_RET_SUCCESS;
  69. }
  70. static cmd_tbl_t cmd_adc_sub[] = {
  71. U_BOOT_CMD_MKENT(list, 1, 1, do_adc_list, "", ""),
  72. U_BOOT_CMD_MKENT(info, 2, 1, do_adc_info, "", ""),
  73. U_BOOT_CMD_MKENT(single, 3, 1, do_adc_single, "", ""),
  74. };
  75. static int do_adc(cmd_tbl_t *cmdtp, int flag, int argc,
  76. char *const argv[])
  77. {
  78. cmd_tbl_t *c;
  79. if (argc < 2)
  80. return CMD_RET_USAGE;
  81. /* Strip off leading 'adc' command argument */
  82. argc--;
  83. argv++;
  84. c = find_cmd_tbl(argv[0], &cmd_adc_sub[0], ARRAY_SIZE(cmd_adc_sub));
  85. if (c)
  86. return c->cmd(cmdtp, flag, argc, argv);
  87. else
  88. return CMD_RET_USAGE;
  89. }
  90. static char adc_help_text[] =
  91. "list - list ADC devices\n"
  92. "adc info <name> - Get ADC device info\n"
  93. "adc single <name> <channel> - Get Single data of ADC device channel";
  94. U_BOOT_CMD(adc, 4, 1, do_adc, "ADC sub-system", adc_help_text);