1*4882a593Smuzhiyun /* 2*4882a593Smuzhiyun * Copyright (C) 2012 Samsung Electronics 3*4882a593Smuzhiyun * Minkyu Kang <mk7.kang@samsung.com> 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+ 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #include <common.h> 9*4882a593Smuzhiyun #include <asm/io.h> 10*4882a593Smuzhiyun #include <asm/arch/watchdog.h> 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun #define PRESCALER_VAL 255 13*4882a593Smuzhiyun wdt_stop(void)14*4882a593Smuzhiyunvoid wdt_stop(void) 15*4882a593Smuzhiyun { 16*4882a593Smuzhiyun struct s5p_watchdog *wdt = 17*4882a593Smuzhiyun (struct s5p_watchdog *)samsung_get_base_watchdog(); 18*4882a593Smuzhiyun unsigned int wtcon; 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun wtcon = readl(&wdt->wtcon); 21*4882a593Smuzhiyun wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET); 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun writel(wtcon, &wdt->wtcon); 24*4882a593Smuzhiyun } 25*4882a593Smuzhiyun wdt_start(unsigned int timeout)26*4882a593Smuzhiyunvoid wdt_start(unsigned int timeout) 27*4882a593Smuzhiyun { 28*4882a593Smuzhiyun struct s5p_watchdog *wdt = 29*4882a593Smuzhiyun (struct s5p_watchdog *)samsung_get_base_watchdog(); 30*4882a593Smuzhiyun unsigned int wtcon; 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun wdt_stop(); 33*4882a593Smuzhiyun 34*4882a593Smuzhiyun wtcon = readl(&wdt->wtcon); 35*4882a593Smuzhiyun wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128)); 36*4882a593Smuzhiyun wtcon &= ~WTCON_INT; 37*4882a593Smuzhiyun wtcon |= WTCON_RESET; 38*4882a593Smuzhiyun wtcon |= WTCON_PRESCALER(PRESCALER_VAL); 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun writel(timeout, &wdt->wtdat); 41*4882a593Smuzhiyun writel(timeout, &wdt->wtcnt); 42*4882a593Smuzhiyun writel(wtcon, &wdt->wtcon); 43*4882a593Smuzhiyun } 44