cmd/pmc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Intel PMC command
   4  *
   5  * Copyright 2019 Google LLC
   6  */
   7
   8 #include <command.h>
   9 #include <dm.h>
  10 #include <power/acpi_pmc.h>
  11
  12 static int get_pmc_dev(struct udevice **devp)
  13 {
  14         struct udevice *dev;
  15         int ret;
  16
  17         ret = uclass_first_device_err(UCLASS_ACPI_PMC, &dev);
  18         if (ret) {
  19                 printf("Could not find device (err=%d)\n", ret);
  20                 return ret;
  21         }
  22         ret = pmc_init(dev);
  23         if (ret) {
  24                 printf("Could not init device (err=%d)\n", ret);
  25                 return ret;
  26         }
  27         *devp = dev;
  28
  29         return 0;
  30 }
  31
  32 static int do_pmc_init(struct cmd_tbl *cmdtp, int flag, int argc,
  33                        char *const argv[])
  34 {
  35         struct udevice *dev;
  36         int ret;
  37
  38         ret = get_pmc_dev(&dev);
  39         if (ret)
  40                 return CMD_RET_FAILURE;
  41
  42         return 0;
  43 }
  44
  45 static int do_pmc_info(struct cmd_tbl *cmdtp, int flag, int argc,
  46                        char *const argv[])
  47 {
  48         struct udevice *dev;
  49         int ret;
  50
  51         ret = get_pmc_dev(&dev);
  52         if (ret)
  53                 return CMD_RET_FAILURE;
  54         pmc_dump_info(dev);
  55
  56         return 0;
  57 }
  58
  59 static struct cmd_tbl cmd_pmc_sub[] = {
  60         U_BOOT_CMD_MKENT(init, 0, 1, do_pmc_init, "", ""),
  61         U_BOOT_CMD_MKENT(info, 0, 1, do_pmc_info, "", ""),
  62 };
  63
  64 static int do_pmc(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  65 {
  66         const struct cmd_tbl *cp;
  67
  68         if (argc < 2) /* no subcommand */
  69                 return cmd_usage(cmdtp);
  70
  71         cp = find_cmd_tbl(argv[1], &cmd_pmc_sub[0], ARRAY_SIZE(cmd_pmc_sub));
  72         if (!cp)
  73                 return CMD_RET_USAGE;
  74
  75         return cp->cmd(cmdtp, flag, argc, argv);
  76 }
  77
  78 U_BOOT_CMD(
  79         pmc, 2, 1, do_pmc, "Power-management controller info",
  80         "info - read state and show info about the PMC\n"
  81         "pmc init - read state from the PMC\n"
  82         );