cmd/clk.c

   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-internal.h>
  11 #endif
  12
  13 int __weak soc_clk_dump(void)
  14 {
  15 #if defined(CONFIG_DM) && defined(CONFIG_CLK)
  16         struct udevice *dev;
  17         struct uclass *uc;
  18         struct clk clk;
  19         int ret;
  20         ulong rate;
  21
  22         /* Device addresses start at 1 */
  23         ret = uclass_get(UCLASS_CLK, &uc);
  24         if (ret)
  25                 return ret;
  26
  27         uclass_foreach_dev(dev, uc) {
  28                 memset(&clk, 0, sizeof(clk));
  29                 ret = device_probe(dev);
  30                 if (ret)
  31                         goto noclk;
  32
  33                 ret = clk_request(dev, &clk);
  34                 if (ret)
  35                         goto noclk;
  36
  37                 rate = clk_get_rate(&clk);
  38                 clk_free(&clk);
  39
  40                 if (rate == -ENODEV)
  41                         goto noclk;
  42
  43                 printf("%-30.30s : %lu Hz\n", dev->name, rate);
  44                 continue;
  45         noclk:
  46                 printf("%-30.30s : ? Hz\n", dev->name);
  47         }
  48
  49         return 0;
  50 #else
  51         puts("Not implemented\n");
  52         return 1;
  53 #endif
  54 }
  55
  56 static int do_clk_dump(cmd_tbl_t *cmdtp, int flag, int argc,
  57                        char *const argv[])
  58 {
  59         int ret;
  60
  61         ret = soc_clk_dump();
  62         if (ret < 0) {
  63                 printf("Clock dump error %d\n", ret);
  64                 ret = CMD_RET_FAILURE;
  65         }
  66
  67         return ret;
  68 }
  69
  70 static cmd_tbl_t cmd_clk_sub[] = {
  71         U_BOOT_CMD_MKENT(dump, 1, 1, do_clk_dump, "", ""),
  72 };
  73
  74 static int do_clk(cmd_tbl_t *cmdtp, int flag, int argc,
  75                   char *const argv[])
  76 {
  77         cmd_tbl_t *c;
  78
  79         if (argc < 2)
  80                 return CMD_RET_USAGE;
  81
  82         /* Strip off leading 'clk' command argument */
  83         argc--;
  84         argv++;
  85
  86         c = find_cmd_tbl(argv[0], &cmd_clk_sub[0], ARRAY_SIZE(cmd_clk_sub));
  87
  88         if (c)
  89                 return c->cmd(cmdtp, flag, argc, argv);
  90         else
  91                 return CMD_RET_USAGE;
  92 }
  93
  94 #ifdef CONFIG_SYS_LONGHELP
  95 static char clk_help_text[] =
  96         "dump - Print clock frequencies";
  97 #endif
  98
  99 U_BOOT_CMD(clk, 2, 1, do_clk, "CLK sub-system", clk_help_text);