LXR uboot/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 <common.h>
   9#include <command.h>
  10#include <dm.h>
  11#include <power/acpi_pmc.h>
  12
  13static int get_pmc_dev(struct udevice **devp)
  14{
  15        struct udevice *dev;
  16        int ret;
  17
  18        ret = uclass_first_device_err(UCLASS_ACPI_PMC, &dev);
  19        if (ret) {
  20                printf("Could not find device (err=%d)\n", ret);
  21                return ret;
  22        }
  23        ret = pmc_init(dev);
  24        if (ret) {
  25                printf("Could not init device (err=%d)\n", ret);
  26                return ret;
  27        }
  28        *devp = dev;
  29
  30        return 0;
  31}
  32
  33static int do_pmc_init(struct cmd_tbl *cmdtp, int flag, int argc,
  34                       char *const argv[])
  35{
  36        struct udevice *dev;
  37        int ret;
  38
  39        ret = get_pmc_dev(&dev);
  40        if (ret)
  41                return CMD_RET_FAILURE;
  42
  43        return 0;
  44}
  45
  46static int do_pmc_info(struct cmd_tbl *cmdtp, int flag, int argc,
  47                       char *const argv[])
  48{
  49        struct udevice *dev;
  50        int ret;
  51
  52        ret = get_pmc_dev(&dev);
  53        if (ret)
  54                return CMD_RET_FAILURE;
  55        pmc_dump_info(dev);
  56
  57        return 0;
  58}
  59
  60static struct cmd_tbl cmd_pmc_sub[] = {
  61        U_BOOT_CMD_MKENT(init, 0, 1, do_pmc_init, "", ""),
  62        U_BOOT_CMD_MKENT(info, 0, 1, do_pmc_info, "", ""),
  63};
  64
  65static int do_pmc(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  66{
  67        const struct cmd_tbl *cp;
  68
  69        if (argc < 2) /* no subcommand */
  70                return cmd_usage(cmdtp);
  71
  72        cp = find_cmd_tbl(argv[1], &cmd_pmc_sub[0], ARRAY_SIZE(cmd_pmc_sub));
  73        if (!cp)
  74                return CMD_RET_USAGE;
  75
  76        return cp->cmd(cmdtp, flag, argc, argv);
  77}
  78
  79U_BOOT_CMD(
  80        pmc, 2, 1, do_pmc, "Power-management controller info",
  81        "info - read state and show info about the PMC\n"
  82        "pmc init - read state from the PMC\n"
  83        );
  84