clock_manager.c 1.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. /*
  3. * Copyright (C) 2013-2017 Altera Corporation <www.altera.com>
  4. */
  5. #include <common.h>
  6. #include <command.h>
  7. #include <init.h>
  8. #include <wait_bit.h>
  9. #include <asm/io.h>
  10. #include <asm/arch/clock_manager.h>
  11. DECLARE_GLOBAL_DATA_PTR;
  12. void cm_wait_for_lock(u32 mask)
  13. {
  14. u32 inter_val;
  15. u32 retry = 0;
  16. do {
  17. #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
  18. inter_val = readl(socfpga_get_clkmgr_addr() +
  19. CLKMGR_INTER) & mask;
  20. #else
  21. inter_val = readl(socfpga_get_clkmgr_addr() +
  22. CLKMGR_STAT) & mask;
  23. #endif
  24. /* Wait for stable lock */
  25. if (inter_val == mask)
  26. retry++;
  27. else
  28. retry = 0;
  29. if (retry >= 10)
  30. break;
  31. } while (1);
  32. }
  33. /* function to poll in the fsm busy bit */
  34. int cm_wait_for_fsm(void)
  35. {
  36. return wait_for_bit_le32((const void *)(socfpga_get_clkmgr_addr() +
  37. CLKMGR_STAT), CLKMGR_STAT_BUSY, false, 20000,
  38. false);
  39. }
  40. int set_cpu_clk_info(void)
  41. {
  42. #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
  43. /* Calculate the clock frequencies required for drivers */
  44. cm_get_l4_sp_clk_hz();
  45. cm_get_mmc_controller_clk_hz();
  46. #endif
  47. gd->bd->bi_arm_freq = cm_get_mpu_clk_hz() / 1000000;
  48. gd->bd->bi_dsp_freq = 0;
  49. #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
  50. gd->bd->bi_ddr_freq = cm_get_sdram_clk_hz() / 1000000;
  51. #else
  52. gd->bd->bi_ddr_freq = 0;
  53. #endif
  54. return 0;
  55. }
  56. #ifndef CONFIG_SPL_BUILD
  57. static int do_showclocks(struct cmd_tbl *cmdtp, int flag, int argc,
  58. char *const argv[])
  59. {
  60. cm_print_clock_quick_summary();
  61. return 0;
  62. }
  63. U_BOOT_CMD(
  64. clocks, CONFIG_SYS_MAXARGS, 1, do_showclocks,
  65. "display clocks",
  66. ""
  67. );
  68. #endif