arch/arm/mach-socfpga/clock_manager.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright (C) 2013-2017 Altera Corporation <www.altera.com>
   4  */
   5
   6 #include <common.h>
   7 #include <command.h>
   8 #include <init.h>
   9 #include <wait_bit.h>
  10 #include <asm/io.h>
  11 #include <asm/arch/clock_manager.h>
  12
  13 DECLARE_GLOBAL_DATA_PTR;
  14
  15 void cm_wait_for_lock(u32 mask)
  16 {
  17         u32 inter_val;
  18         u32 retry = 0;
  19         do {
  20 #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
  21                 inter_val = readl(socfpga_get_clkmgr_addr() +
  22                                   CLKMGR_INTER) & mask;
  23 #else
  24                 inter_val = readl(socfpga_get_clkmgr_addr() +
  25                                   CLKMGR_STAT) & mask;
  26 #endif
  27                 /* Wait for stable lock */
  28                 if (inter_val == mask)
  29                         retry++;
  30                 else
  31                         retry = 0;
  32                 if (retry >= 10)
  33                         break;
  34         } while (1);
  35 }
  36
  37 /* function to poll in the fsm busy bit */
  38 int cm_wait_for_fsm(void)
  39 {
  40         return wait_for_bit_le32((const void *)(socfpga_get_clkmgr_addr() +
  41                                  CLKMGR_STAT), CLKMGR_STAT_BUSY, false, 20000,
  42                                  false);
  43 }
  44
  45 int set_cpu_clk_info(void)
  46 {
  47 #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
  48         /* Calculate the clock frequencies required for drivers */
  49         cm_get_l4_sp_clk_hz();
  50         cm_get_mmc_controller_clk_hz();
  51 #endif
  52
  53         gd->bd->bi_arm_freq = cm_get_mpu_clk_hz() / 1000000;
  54         gd->bd->bi_dsp_freq = 0;
  55
  56 #if defined(CONFIG_TARGET_SOCFPGA_GEN5)
  57         gd->bd->bi_ddr_freq = cm_get_sdram_clk_hz() / 1000000;
  58 #else
  59         gd->bd->bi_ddr_freq = 0;
  60 #endif
  61
  62         return 0;
  63 }
  64
  65 #ifndef CONFIG_SPL_BUILD
  66 static int do_showclocks(struct cmd_tbl *cmdtp, int flag, int argc,
  67                          char *const argv[])
  68 {
  69         cm_print_clock_quick_summary();
  70         return 0;
  71 }
  72
  73 U_BOOT_CMD(
  74         clocks, CONFIG_SYS_MAXARGS, 1, do_showclocks,
  75         "display clocks",
  76         ""
  77 );
  78 #endif