projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 851db35e MK |
2 | /* |
| 3 | * Copyright (C) 2012 Samsung Electronics | |
| 4 | * Minkyu Kang <mk7.kang@samsung.com> | |
| 851db35e MK |
5 | */ |
| 6 | ||
| 7 | #include <common.h> | |
| 8 | #include <asm/io.h> | |
| 9 | #include <asm/arch/watchdog.h> | |
| 10 | ||
| 11 | #define PRESCALER_VAL 255 | |
| 12 | ||
| 13 | void wdt_stop(void) | |
| 14 | { | |
| 15 | struct s5p_watchdog *wdt = | |
| 16 | (struct s5p_watchdog *)samsung_get_base_watchdog(); | |
| 17 | unsigned int wtcon; | |
| 18 | ||
| 19 | wtcon = readl(&wdt->wtcon); | |
| 20 | wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET); | |
| 21 | ||
| 22 | writel(wtcon, &wdt->wtcon); | |
| 23 | } | |
| 24 | ||
| 25 | void wdt_start(unsigned int timeout) | |
| 26 | { | |
| 27 | struct s5p_watchdog *wdt = | |
| 28 | (struct s5p_watchdog *)samsung_get_base_watchdog(); | |
| 29 | unsigned int wtcon; | |
| 30 | ||
| 31 | wdt_stop(); | |
| 32 | ||
| 33 | wtcon = readl(&wdt->wtcon); | |
| 34 | wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128)); | |
| 35 | wtcon &= ~WTCON_INT; | |
| 36 | wtcon |= WTCON_RESET; | |
| 37 | wtcon |= WTCON_PRESCALER(PRESCALER_VAL); | |
| 38 | ||
| 39 | writel(timeout, &wdt->wtdat); | |
| 40 | writel(timeout, &wdt->wtcnt); | |
| 41 | writel(wtcon, &wdt->wtcon); | |
| 42 | } |