diff options
Diffstat (limited to 'cmd/wdt.c')
| -rw-r--r-- | cmd/wdt.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/cmd/wdt.c b/cmd/wdt.c new file mode 100644 index 0000000..647d989 --- /dev/null +++ b/cmd/wdt.c @@ -0,0 +1,174 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Watchdog commands + * + * Copyright (c) 2019 Michael Walle <michael@walle.cc> + */ + +#include <common.h> +#include <command.h> +#include <dm.h> +#include <wdt.h> + +static struct udevice *currdev; + +static int do_wdt_list(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct udevice *dev; + struct uclass *uc; + int ret; + + ret = uclass_get(UCLASS_WDT, &uc); + if (ret) + return CMD_RET_FAILURE; + + uclass_foreach_dev(dev, uc) + printf("%s (%s)\n", dev->name, dev->driver->name); + + return CMD_RET_SUCCESS; +} + +static int do_wdt_dev(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + int ret; + + if (argc > 1) { + ret = uclass_get_device_by_name(UCLASS_WDT, argv[1], &currdev); + if (ret) { + printf("Can't get the watchdog timer: %s\n", argv[1]); + return CMD_RET_FAILURE; + } + } else { + if (!currdev) { + printf("No watchdog timer device set!\n"); + return CMD_RET_FAILURE; + } + printf("dev: %s\n", currdev->name); + } + + return CMD_RET_SUCCESS; +} + +static int check_currdev(void) +{ + if (!currdev) { + printf("No device set, use 'wdt dev' first\n"); + return CMD_RET_FAILURE; + } + return 0; +} + +static int do_wdt_start(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + int ret; + u64 timeout; + ulong flags = 0; + + if (argc < 2) + return CMD_RET_USAGE; + + ret = check_currdev(); + if (ret) + return ret; + + timeout = simple_strtoull(argv[1], NULL, 0); + if (argc > 2) + flags = simple_strtoul(argv[2], NULL, 0); + + ret = wdt_start(currdev, timeout, flags); + if (ret == -ENOSYS) { + printf("Starting watchdog timer not supported.\n"); + return CMD_RET_FAILURE; + } else if (ret) { + printf("Starting watchdog timer failed (%d)\n", ret); + return CMD_RET_FAILURE; + } + + return CMD_RET_SUCCESS; +} + +static int do_wdt_stop(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + int ret; + + ret = check_currdev(); + if (ret) + return ret; + + ret = wdt_stop(currdev); + if (ret == -ENOSYS) { + printf("Stopping watchdog timer not supported.\n"); + return CMD_RET_FAILURE; + } else if (ret) { + printf("Stopping watchdog timer failed (%d)\n", ret); + return CMD_RET_FAILURE; + } + + return CMD_RET_SUCCESS; +} + +static int do_wdt_reset(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + int ret; + + ret = check_currdev(); + if (ret) + return ret; + + ret = wdt_reset(currdev); + if (ret == -ENOSYS) { + printf("Resetting watchdog timer not supported.\n"); + return CMD_RET_FAILURE; + } else if (ret) { + printf("Resetting watchdog timer failed (%d)\n", ret); + return CMD_RET_FAILURE; + } + + return CMD_RET_SUCCESS; +} + +static int do_wdt_expire(cmd_tbl_t *cmdtp, int flag, int argc, + char *const argv[]) +{ + int ret; + ulong flags = 0; + + ret = check_currdev(); + if (ret) + return ret; + + if (argc > 1) + flags = simple_strtoul(argv[1], NULL, 0); + + ret = wdt_expire_now(currdev, flags); + if (ret == -ENOSYS) { + printf("Expiring watchdog timer not supported.\n"); + return CMD_RET_FAILURE; + } else if (ret) { + printf("Expiring watchdog timer failed (%d)\n", ret); + return CMD_RET_FAILURE; + } + + return CMD_RET_SUCCESS; +} + +static char wdt_help_text[] = + "list - list watchdog devices\n" + "wdt dev [<name>] - get/set current watchdog device\n" + "wdt start <timeout ms> [flags] - start watchdog timer\n" + "wdt stop - stop watchdog timer\n" + "wdt reset - reset watchdog timer\n" + "wdt expire [flags] - expire watchdog timer immediately\n"; + +U_BOOT_CMD_WITH_SUBCMDS(wdt, "Watchdog sub-system", wdt_help_text, + U_BOOT_SUBCMD_MKENT(list, 1, 1, do_wdt_list), + U_BOOT_SUBCMD_MKENT(dev, 2, 1, do_wdt_dev), + U_BOOT_SUBCMD_MKENT(start, 3, 1, do_wdt_start), + U_BOOT_SUBCMD_MKENT(stop, 1, 1, do_wdt_stop), + U_BOOT_SUBCMD_MKENT(reset, 1, 1, do_wdt_reset), + U_BOOT_SUBCMD_MKENT(expire, 2, 1, do_wdt_expire)); |