adc.c 3.6 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(struct cmd_tbl *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(struct cmd_tbl *cmdtp, int flag, int argc,
  29. char *const argv[])
  30. {
  31. struct udevice *dev;
  32. unsigned int data_mask, ch_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_channel_mask(dev, &ch_mask);
  43. if (!ret)
  44. printf("channel mask: %x\n", ch_mask);
  45. ret = adc_data_mask(dev, &data_mask);
  46. if (!ret)
  47. printf("data mask: %x\n", data_mask);
  48. ret = adc_vdd_value(dev, &vdd);
  49. if (!ret)
  50. printf("vdd: %duV\n", vdd);
  51. ret = adc_vss_value(dev, &vss);
  52. if (!ret)
  53. printf("vss: %duV\n", vss);
  54. return CMD_RET_SUCCESS;
  55. }
  56. static int do_adc_single(struct cmd_tbl *cmdtp, int flag, int argc,
  57. char *const argv[])
  58. {
  59. struct udevice *dev;
  60. unsigned int data;
  61. int ret, uV;
  62. if (argc < 3)
  63. return CMD_RET_USAGE;
  64. ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
  65. &data);
  66. if (ret) {
  67. printf("Error getting single shot for device %s channel %s\n",
  68. argv[1], argv[2]);
  69. return CMD_RET_FAILURE;
  70. }
  71. ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
  72. if (!ret && !adc_raw_to_uV(dev, data, &uV))
  73. printf("%u, %d uV\n", data, uV);
  74. else
  75. printf("%u\n", data);
  76. return CMD_RET_SUCCESS;
  77. }
  78. static int do_adc_scan(struct cmd_tbl *cmdtp, int flag, int argc,
  79. char *const argv[])
  80. {
  81. struct adc_channel ch[ADC_MAX_CHANNEL];
  82. struct udevice *dev;
  83. unsigned int ch_mask;
  84. int i, chan, ret, uV;
  85. if (argc < 2)
  86. return CMD_RET_USAGE;
  87. ret = uclass_get_device_by_name(UCLASS_ADC, argv[1], &dev);
  88. if (ret) {
  89. pr_err("Can't get the ADC %s: %d\n", argv[1], ret);
  90. return CMD_RET_FAILURE;
  91. }
  92. switch (argc) {
  93. case 3:
  94. ch_mask = simple_strtoul(argv[2], NULL, 0);
  95. if (ch_mask)
  96. break;
  97. case 2:
  98. ret = adc_channel_mask(dev, &ch_mask);
  99. if (ret) {
  100. pr_err("Can't get mask for %s: %d\n", dev->name, ret);
  101. return CMD_RET_FAILURE;
  102. }
  103. break;
  104. }
  105. ret = adc_channels_single_shot(dev->name, ch_mask, ch);
  106. if (ret) {
  107. pr_err("Can't get single shot for %s (chans mask: 0x%x): %d\n",
  108. dev->name, ch_mask, ret);
  109. return CMD_RET_FAILURE;
  110. }
  111. for (chan = 0, i = 0; chan < ADC_MAX_CHANNEL; chan++) {
  112. if (!(ch_mask & ADC_CHANNEL(chan)))
  113. continue;
  114. if (!adc_raw_to_uV(dev, ch[i].data, &uV))
  115. printf("[%02d]: %u, %d uV\n", ch[i].id, ch[i].data, uV);
  116. else
  117. printf("[%02d]: %u\n", ch[i].id, ch[i].data);
  118. i++;
  119. }
  120. return CMD_RET_SUCCESS;
  121. }
  122. static char adc_help_text[] =
  123. "list - list ADC devices\n"
  124. "adc info <name> - Get ADC device info\n"
  125. "adc single <name> <channel> - Get Single data of ADC device channel\n"
  126. "adc scan <name> [channel mask] - Scan all [or masked] ADC channels";
  127. U_BOOT_CMD_WITH_SUBCMDS(adc, "ADC sub-system", adc_help_text,
  128. U_BOOT_SUBCMD_MKENT(list, 1, 1, do_adc_list),
  129. U_BOOT_SUBCMD_MKENT(info, 2, 1, do_adc_info),
  130. U_BOOT_SUBCMD_MKENT(single, 3, 1, do_adc_single),
  131. U_BOOT_SUBCMD_MKENT(scan, 3, 1, do_adc_scan));