1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 /***************************************************************************
4 * Copyright (C) 2017 Tomas Vanek *
6 ***************************************************************************/
9 Disable watchdog, 32-bit version for newer Kinetis
11 r0 ... WDOG32 base (in)
13 Used instruction set should work on both Cortex-M4 and M0+
21 /* WDOG registers offsets */
30 /* test WDOG_CS bit CMD32EN */
38 str r3, [r0, WDOG_CNT]
42 /* WDOG_CNT = key, halfword by halfword */
43 strh r3, [r0, WDOG_CNT]
45 strh r3, [r0, WDOG_CNT]
47 /* WDOG_CS: clear EN bit 7, set UPDATE bit 5 */
54 /* All active WDOG registers have to be updated, set dummy timeout */
55 /* WDOG_TOVAL = 0x400 */
57 str r3, [r0, WDOG_TOVAL]
58 /* OpenOCD checks exit point address. Jump to the very end. */
63 /* Avoid padding at .text segment end. Otherwise exit point check fails. */
64 .skip ( . - start + 2) & 2, 0