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	The compiler is not happy when neither USB nor TFTP transport for DFU defined:
cmd/dfu.c: In function ‘do_dfu’:
cmd/dfu.c:31:8: warning: unused variable ‘devstring’ [-Wunused-variable]
  char *devstring = argv[3];
        ^~~~~~~~~
cmd/dfu.c:30:8: warning: unused variable ‘interface’ [-Wunused-variable]
    char *interface = argv[2];
          ^~~~~~~~~
Surround those variables by #ifdef expression.
More serious, that comes under same circumstances, is a compilation error due
to absence of macro parameter:
In file included from include/image.h:45,
                 from include/common.h:35,
                 from cmd/dfu.c:13:
include/command.h:207:24: error: expected expression before ‘,’ token
 # define _CMD_HELP(x) x,
                        ^
include/command.h:286:18: note: in expansion of macro ‘_CMD_HELP’
    _cmd, _usage, _CMD_HELP(_help) _CMD_COMPLETE(_comp) }
                  ^~~~~~~~~
include/command.h:290:3: note: in expansion of macro ‘U_BOOT_CMD_MKENT_COMPLETE’
   U_BOOT_CMD_MKENT_COMPLETE(_name, _maxargs, _rep, _cmd, \
   ^~~~~~~~~~~~~~~~~~~~~~~~~
include/command.h:332:2: note: in expansion of macro ‘U_BOOT_CMD_COMPLETE’
  U_BOOT_CMD_COMPLETE(_name, _maxargs, _rep, _cmd, _usage, _help, NULL)
  ^~~~~~~~~~~~~~~~~~~
cmd/dfu.c:70:1: note: in expansion of macro ‘U_BOOT_CMD’
 U_BOOT_CMD(dfu, CONFIG_SYS_MAXARGS, 1, do_dfu,
 ^~~~~~~~~~
make[1]: *** [scripts/Makefile.build:279: cmd/dfu.o] Error 1
make: *** [Makefile:1518: cmd] Error 2
Put empty string unconditionally to have macro parameter present.
Fixes: 0f44d33536a5 ("dfu: Fix up the Kconfig mess")
Cc: Marek Vasut <marek.vasut@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Lukasz Majewski <lukma@denx.de>
		
	
			
		
			
				
	
	
		
			87 lines
		
	
	
		
			1.9 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			87 lines
		
	
	
		
			1.9 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
| // SPDX-License-Identifier: GPL-2.0+
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| /*
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|  * cmd_dfu.c -- dfu command
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|  *
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|  * Copyright (C) 2015
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|  * Lukasz Majewski <l.majewski@majess.pl>
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|  *
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|  * Copyright (C) 2012 Samsung Electronics
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|  * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
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|  *	    Lukasz Majewski <l.majewski@samsung.com>
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|  */
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| 
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| #include <common.h>
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| #include <watchdog.h>
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| #include <dfu.h>
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| #include <console.h>
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| #include <g_dnl.h>
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| #include <usb.h>
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| #include <net.h>
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| 
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| static int do_dfu(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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| {
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| 
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| 	if (argc < 4)
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| 		return CMD_RET_USAGE;
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| 
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| #ifdef CONFIG_DFU_OVER_USB
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| 	char *usb_controller = argv[1];
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| #endif
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| #if defined(CONFIG_DFU_OVER_USB) || defined(CONFIG_DFU_OVER_TFTP)
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| 	char *interface = argv[2];
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| 	char *devstring = argv[3];
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| #endif
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| 
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| 	int ret = 0;
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| #ifdef CONFIG_DFU_OVER_TFTP
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| 	unsigned long addr = 0;
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| 	if (!strcmp(argv[1], "tftp")) {
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| 		if (argc == 5)
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| 			addr = simple_strtoul(argv[4], NULL, 0);
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| 
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| 		return update_tftp(addr, interface, devstring);
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| 	}
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| #endif
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| #ifdef CONFIG_DFU_OVER_USB
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| 	ret = dfu_init_env_entities(interface, devstring);
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| 	if (ret)
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| 		goto done;
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| 
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| 	ret = CMD_RET_SUCCESS;
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| 	if (argc > 4 && strcmp(argv[4], "list") == 0) {
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| 		dfu_show_entities();
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| 		goto done;
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| 	}
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| 
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| 	int controller_index = simple_strtoul(usb_controller, NULL, 0);
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| 
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| 	run_usb_dnl_gadget(controller_index, "usb_dnl_dfu");
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| 
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| done:
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| 	dfu_free_entities();
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| #endif
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| 	return ret;
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| }
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| 
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| U_BOOT_CMD(dfu, CONFIG_SYS_MAXARGS, 1, do_dfu,
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| 	"Device Firmware Upgrade",
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| 	""
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| #ifdef CONFIG_DFU_OVER_USB
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| 	"<USB_controller> <interface> <dev> [list]\n"
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| 	"  - device firmware upgrade via <USB_controller>\n"
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| 	"    on device <dev>, attached to interface\n"
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| 	"    <interface>\n"
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| 	"    [list] - list available alt settings\n"
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| #endif
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| #ifdef CONFIG_DFU_OVER_TFTP
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| #ifdef CONFIG_DFU_OVER_USB
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| 	"dfu "
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| #endif
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| 	"tftp <interface> <dev> [<addr>]\n"
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| 	"  - device firmware upgrade via TFTP\n"
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| 	"    on device <dev>, attached to interface\n"
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| 	"    <interface>\n"
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| 	"    [<addr>] - address where FIT image has been stored\n"
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| #endif
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| );
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