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gpio: use appropriate return values for cmd handler
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1 /*
2  * cmd_thordown.c -- USB TIZEN "THOR" Downloader gadget
3  *
4  * Copyright (C) 2013 Lukasz Majewski <l.majewski@samsung.com>
5  * All rights reserved.
6  *
7  * SPDX-License-Identifier:     GPL-2.0+
8  */
9
10 #include <common.h>
11 #include <thor.h>
12 #include <dfu.h>
13 #include <g_dnl.h>
14 #include <usb.h>
15
16 int do_thor_down(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
17 {
18         if (argc < 4)
19                 return CMD_RET_USAGE;
20
21         char *usb_controller = argv[1];
22         char *interface = argv[2];
23         char *devstring = argv[3];
24
25         int ret;
26
27         puts("TIZEN \"THOR\" Downloader\n");
28
29         ret = dfu_init_env_entities(interface, devstring);
30         if (ret)
31                 goto done;
32
33         int controller_index = simple_strtoul(usb_controller, NULL, 0);
34         ret = board_usb_init(controller_index, USB_INIT_DEVICE);
35         if (ret) {
36                 error("USB init failed: %d", ret);
37                 ret = CMD_RET_FAILURE;
38                 goto exit;
39         }
40
41         g_dnl_register("usb_dnl_thor");
42
43         ret = thor_init();
44         if (ret) {
45                 error("THOR DOWNLOAD failed: %d", ret);
46                 ret = CMD_RET_FAILURE;
47                 goto exit;
48         }
49
50         ret = thor_handle();
51         if (ret) {
52                 error("THOR failed: %d", ret);
53                 ret = CMD_RET_FAILURE;
54                 goto exit;
55         }
56
57 exit:
58         g_dnl_unregister();
59         board_usb_cleanup(controller_index, USB_INIT_DEVICE);
60 done:
61         dfu_free_entities();
62
63         return ret;
64 }
65
66 U_BOOT_CMD(thordown, CONFIG_SYS_MAXARGS, 1, do_thor_down,
67            "TIZEN \"THOR\" downloader",
68            "<USB_controller> <interface> <dev>\n"
69            "  - device software upgrade via LTHOR TIZEN dowload\n"
70            "    program via <USB_controller> on device <dev>,\n"
71            "    attached to interface <interface>\n"
72 );