diff options
author | Minkyu Kang <mk7.kang@samsung.com> | 2012-01-18 10:55:05 +0400 |
---|---|---|
committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-02-12 13:11:29 +0400 |
commit | 851db35e2dc07ca1d0a5c02be2652cf1173652eb (patch) | |
tree | f7a6b21a38c5f595014fdb9b39c2790f0feaad57 /arch/arm/cpu/armv7/s5p-common | |
parent | 0e94a7113acf4b1504bbffd32ed8a2cdb9ddd6f9 (diff) | |
download | u-boot-851db35e2dc07ca1d0a5c02be2652cf1173652eb.tar.xz |
S5P: support generic watchdog timer
This patch adds support the generic watchdog timer for s5pc1xx and exynos4
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: HeungJun, Kim <riverful.kim@samsung.com>
Diffstat (limited to 'arch/arm/cpu/armv7/s5p-common')
-rw-r--r-- | arch/arm/cpu/armv7/s5p-common/Makefile | 1 | ||||
-rw-r--r-- | arch/arm/cpu/armv7/s5p-common/wdt.c | 59 |
2 files changed, 60 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/s5p-common/Makefile b/arch/arm/cpu/armv7/s5p-common/Makefile index 17053995bd..f975f3f06c 100644 --- a/arch/arm/cpu/armv7/s5p-common/Makefile +++ b/arch/arm/cpu/armv7/s5p-common/Makefile @@ -28,6 +28,7 @@ LIB = $(obj)libs5p-common.o COBJS-y += cpu_info.o COBJS-y += timer.o COBJS-y += sromc.o +COBJS-y += wdt.o COBJS-$(CONFIG_PWM) += pwm.o SRCS := $(SOBJS:.o=.S) $(COBJS:.o=.c) diff --git a/arch/arm/cpu/armv7/s5p-common/wdt.c b/arch/arm/cpu/armv7/s5p-common/wdt.c new file mode 100644 index 0000000000..94acc1e4ba --- /dev/null +++ b/arch/arm/cpu/armv7/s5p-common/wdt.c @@ -0,0 +1,59 @@ +/* + * Copyright (C) 2012 Samsung Electronics + * Minkyu Kang <mk7.kang@samsung.com> + * + * 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 <common.h> +#include <asm/io.h> +#include <asm/arch/watchdog.h> + +#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); +} |