From 2b5fdd07c51cc4f1c99f70d4753bffa45070bf5a Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Sat, 21 Jul 2012 05:02:24 +0000 Subject: dm: wdt: Move s5p watchdog timer to drivers/watchdog/ MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Marek Vasut Cc: David Müller Cc: Wolfgang Denk Cc: Albert Aribaud Cc: U-Boot DM Signed-off-by: Minkyu Kang --- drivers/watchdog/s5p_wdt.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 drivers/watchdog/s5p_wdt.c (limited to 'drivers/watchdog/s5p_wdt.c') diff --git a/drivers/watchdog/s5p_wdt.c b/drivers/watchdog/s5p_wdt.c new file mode 100644 index 0000000..94acc1e --- /dev/null +++ b/drivers/watchdog/s5p_wdt.c @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * Minkyu Kang + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include + +#define PRESCALER_VAL 255 + +void wdt_stop(void) +{ + struct s5p_watchdog *wdt = + (struct s5p_watchdog *)samsung_get_base_watchdog(); + unsigned int wtcon; + + wtcon = readl(&wdt->wtcon); + wtcon &= ~(WTCON_EN | WTCON_INT | WTCON_RESET); + + writel(wtcon, &wdt->wtcon); +} + +void wdt_start(unsigned int timeout) +{ + struct s5p_watchdog *wdt = + (struct s5p_watchdog *)samsung_get_base_watchdog(); + unsigned int wtcon; + + wdt_stop(); + + wtcon = readl(&wdt->wtcon); + wtcon |= (WTCON_EN | WTCON_CLK(WTCON_CLK_128)); + wtcon &= ~WTCON_INT; + wtcon |= WTCON_RESET; + wtcon |= WTCON_PRESCALER(PRESCALER_VAL); + + writel(timeout, &wdt->wtdat); + writel(timeout, &wdt->wtcnt); + writel(wtcon, &wdt->wtcon); +} -- cgit v1.1