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