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
get_pmc_dev(struct udevice ** devp)13 static 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
do_pmc_init(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])33 static 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
do_pmc_info(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])46 static 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
60 static 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
do_pmc(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])65 static 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
79 U_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