clk.c 3.2 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2013 Xilinx, Inc.
  4. */
  5. #include <common.h>
  6. #include <command.h>
  7. #include <clk.h>
  8. #if defined(CONFIG_DM) && defined(CONFIG_CLK)
  9. #include <dm.h>
  10. #include <dm/device.h>
  11. #include <dm/root.h>
  12. #include <dm/device-internal.h>
  13. #include <linux/clk-provider.h>
  14. #endif
  15. #if defined(CONFIG_DM) && defined(CONFIG_CLK)
  16. static void show_clks(struct udevice *dev, int depth, int last_flag)
  17. {
  18. int i, is_last;
  19. struct udevice *child;
  20. struct clk *clkp, *parent;
  21. u32 rate;
  22. clkp = dev_get_clk_ptr(dev);
  23. if (clkp) {
  24. parent = clk_get_parent(clkp);
  25. if (!IS_ERR(parent) && depth == -1)
  26. return;
  27. depth++;
  28. rate = clk_get_rate(clkp);
  29. printf(" %-12u %8d ", rate, clkp->enable_count);
  30. for (i = depth; i >= 0; i--) {
  31. is_last = (last_flag >> i) & 1;
  32. if (i) {
  33. if (is_last)
  34. printf(" ");
  35. else
  36. printf("| ");
  37. } else {
  38. if (is_last)
  39. printf("`-- ");
  40. else
  41. printf("|-- ");
  42. }
  43. }
  44. printf("%s\n", dev->name);
  45. }
  46. device_foreach_child_probe(child, dev) {
  47. if (device_get_uclass_id(child) != UCLASS_CLK)
  48. continue;
  49. if (child == dev)
  50. continue;
  51. is_last = list_is_last(&child->sibling_node, &dev->child_head);
  52. show_clks(child, depth, (last_flag << 1) | is_last);
  53. }
  54. }
  55. int __weak soc_clk_dump(void)
  56. {
  57. struct udevice *dev;
  58. printf(" Rate Usecnt Name\n");
  59. printf("------------------------------------------\n");
  60. uclass_foreach_dev_probe(UCLASS_CLK, dev)
  61. show_clks(dev, -1, 0);
  62. return 0;
  63. }
  64. #else
  65. int __weak soc_clk_dump(void)
  66. {
  67. puts("Not implemented\n");
  68. return 1;
  69. }
  70. #endif
  71. static int do_clk_dump(struct cmd_tbl *cmdtp, int flag, int argc,
  72. char *const argv[])
  73. {
  74. int ret;
  75. ret = soc_clk_dump();
  76. if (ret < 0) {
  77. printf("Clock dump error %d\n", ret);
  78. ret = CMD_RET_FAILURE;
  79. }
  80. return ret;
  81. }
  82. #if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
  83. static int do_clk_setfreq(struct cmd_tbl *cmdtp, int flag, int argc,
  84. char *const argv[])
  85. {
  86. struct clk *clk = NULL;
  87. s32 freq;
  88. struct udevice *dev;
  89. if (argc != 3)
  90. return CMD_RET_USAGE;
  91. freq = dectoul(argv[2], NULL);
  92. if (!uclass_get_device_by_name(UCLASS_CLK, argv[1], &dev))
  93. clk = dev_get_clk_ptr(dev);
  94. if (!clk) {
  95. printf("clock '%s' not found.\n", argv[1]);
  96. return CMD_RET_FAILURE;
  97. }
  98. freq = clk_set_rate(clk, freq);
  99. if (freq < 0) {
  100. printf("set_rate failed: %d\n", freq);
  101. return CMD_RET_FAILURE;
  102. }
  103. printf("set_rate returns %u\n", freq);
  104. return 0;
  105. }
  106. #endif
  107. static struct cmd_tbl cmd_clk_sub[] = {
  108. U_BOOT_CMD_MKENT(dump, 1, 1, do_clk_dump, "", ""),
  109. #if CONFIG_IS_ENABLED(DM) && CONFIG_IS_ENABLED(CLK)
  110. U_BOOT_CMD_MKENT(setfreq, 3, 1, do_clk_setfreq, "", ""),
  111. #endif
  112. };
  113. static int do_clk(struct cmd_tbl *cmdtp, int flag, int argc,
  114. char *const argv[])
  115. {
  116. struct cmd_tbl *c;
  117. if (argc < 2)
  118. return CMD_RET_USAGE;
  119. /* Strip off leading 'clk' command argument */
  120. argc--;
  121. argv++;
  122. c = find_cmd_tbl(argv[0], &cmd_clk_sub[0], ARRAY_SIZE(cmd_clk_sub));
  123. if (c)
  124. return c->cmd(cmdtp, flag, argc, argv);
  125. else
  126. return CMD_RET_USAGE;
  127. }
  128. #ifdef CONFIG_SYS_LONGHELP
  129. static char clk_help_text[] =
  130. "dump - Print clock frequencies\n"
  131. "clk setfreq [clk] [freq] - Set clock frequency";
  132. #endif
  133. U_BOOT_CMD(clk, 4, 1, do_clk, "CLK sub-system", clk_help_text);