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Commit | Line | Data |
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851db35e MK |
1 | /* |
2 | * Copyright (C) 2012 Samsung Electronics | |
3 | * Minkyu Kang <mk7.kang@samsung.com> | |
4 | * | |
3765b3e7 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
851db35e MK |
6 | */ |
7 | ||
8 | #include <common.h> | |
9 | #include <asm/io.h> | |
10 | #include <asm/arch/watchdog.h> | |
11 | ||
12 | #define PRESCALER_VAL 255 | |
13 | ||
14 | void wdt_stop(void) | |
15 | { | |
16 | struct s5p_watchdog *wdt = | |
17 | (struct s5p_watchdog *)samsung_get_base_watchdog(); | |
18 | unsigned int wtcon; | |
19 | ||
20 | wtcon = readl(&wdt->wtcon); | |
21 | wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET); | |
22 | ||
23 | writel(wtcon, &wdt->wtcon); | |
24 | } | |
25 | ||
26 | void wdt_start(unsigned int timeout) | |
27 | { | |
28 | struct s5p_watchdog *wdt = | |
29 | (struct s5p_watchdog *)samsung_get_base_watchdog(); | |
30 | unsigned int wtcon; | |
31 | ||
32 | wdt_stop(); | |
33 | ||
34 | wtcon = readl(&wdt->wtcon); | |
35 | wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128)); | |
36 | wtcon &= ~WTCON_INT; | |
37 | wtcon |= WTCON_RESET; | |
38 | wtcon |= WTCON_PRESCALER(PRESCALER_VAL); | |
39 | ||
40 | writel(timeout, &wdt->wtdat); | |
41 | writel(timeout, &wdt->wtcnt); | |
42 | writel(wtcon, &wdt->wtcon); | |
43 | } |