[U-Boot] [PATCH 04/22] ARM: sunxi: watchdog support

[Albert ARIBAUD <albert.u.boot@aribaud.net>]

Hi Henrik,

On Sun, 25 Nov 2012 12:47:11 +0100, Henrik Nordstr?m
<henrik@henriknordstrom.net> wrote:

> This adds support for the hardware watchdog in Allwinner
> sun4i & sun5i (sunxi) SoC familiy.
> 
> From: Henrik Nordstrom <henrik@henriknordstrom.net>
> 
> Signed-off-by: Henrik Nordstrom <henrik@henriknordstrom.net>
> Signed-off-by: Stefan Roese <sr@denx.de>
> ---
>  arch/arm/cpu/armv7/sunxi/board.c            |    3 ++
>  arch/arm/include/asm/arch-sunxi/sys_proto.h |    1 -
>  drivers/watchdog/Makefile                   |    1 +
>  drivers/watchdog/sunxi_watchdog.c           |   49 +++++++++++++++++++++++++++
>  include/configs/sunxi-common.h              |    4 ++
>  5 files changed, 57 insertions(+), 1 deletions(-)
>  create mode 100644 drivers/watchdog/sunxi_watchdog.c
> 
> diff --git a/arch/arm/cpu/armv7/sunxi/board.c b/arch/arm/cpu/armv7/sunxi/board.c
> index 652c19d..5c94110 100644
> --- a/arch/arm/cpu/armv7/sunxi/board.c
> +++ b/arch/arm/cpu/armv7/sunxi/board.c
> @@ -59,6 +59,9 @@ int gpio_init(void)
>  /* do some early init */
>  void s_init(void)
>  {
> +#if defined(CONFIG_WATCHDOG) && defined(CONFIG_SUNXI_WATCHDOG)
> +	watchdog_set(23);	/* max possible timeout */
> +#endif
>  	clock_init();
>  	gpio_init();
>  }
> diff --git a/arch/arm/include/asm/arch-sunxi/sys_proto.h b/arch/arm/include/asm/arch-sunxi/sys_proto.h
> index 1e8ae5d..9729100 100644
> --- a/arch/arm/include/asm/arch-sunxi/sys_proto.h
> +++ b/arch/arm/include/asm/arch-sunxi/sys_proto.h
> @@ -27,6 +27,5 @@
>  
>  void sr32(u32 *, u32, u32, u32);
>  void sdelay(unsigned long);
> -void watchdog_init(void);

Why remove this proto, and why not keep a single watchdog init code?

>  #endif
> diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile
> index 923acb9..50b5fae 100644
> --- a/drivers/watchdog/Makefile
> +++ b/drivers/watchdog/Makefile
> @@ -28,6 +28,7 @@ LIB	:= $(obj)libwatchdog.o
>  COBJS-$(CONFIG_AT91SAM9_WATCHDOG) += at91sam9_wdt.o
>  COBJS-$(CONFIG_FTWDT010_WATCHDOG) += ftwdt010_wdt.o
>  COBJS-$(CONFIG_TNETV107X_WATCHDOG) += tnetv107x_wdt.o
> +COBJS-$(CONFIG_SUNXI_WATCHDOG)    += sunxi_watchdog.o
>  
>  COBJS	:= $(COBJS-y)
>  SRCS	:= $(COBJS:.o=.c)
> diff --git a/drivers/watchdog/sunxi_watchdog.c b/drivers/watchdog/sunxi_watchdog.c
> new file mode 100644
> index 0000000..65a763d
> --- /dev/null
> +++ b/drivers/watchdog/sunxi_watchdog.c
> @@ -0,0 +1,49 @@
> +/*
> + * (C) Copyright 2012 Henrik Nordstrom <henrik@hno.se>
> + *
> + * 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/arch/timer.h>
> +#include <asm/armv7.h>
> +#include <asm/io.h>
> +
> +void watchdog_reset(void)
> +{
> +	static struct sunxi_wdog *const wdog =
> +		&((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog;
> +
> +	/* a little magic to reload the watchdog */
> +	writel(0xA57 << 1 | 1 << 0, &wdog->ctl);
> +}
> +
> +static void watchdog_set(int interval)
> +{
> +	static struct sunxi_wdog *const wdog =
> +		&((struct sunxi_timer_reg *)SUNXI_TIMER_BASE)->wdog;
> +
> +	/* Set timeout, reset & enable */
> +	writel(interval << 2 | 1 << 1 | 1 << 0, &wdog->mode);
> +	watchdog_reset();
> +}
> +
> +void watchdog_init(void)
> +{
> +#ifdef CONFIG_WATCHDOG
> +	watchdog_set(23);	/* max possible timeout */
> +#endif
> +}
> diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
> index c2d16fb..5bf8eea 100644
> --- a/include/configs/sunxi-common.h
> +++ b/include/configs/sunxi-common.h
> @@ -202,4 +202,8 @@
>  #define CONFIG_SYS_I2C_SLAVE		0x7f
>  #define CONFIG_CMD_I2C
>  
> +/* Watchdog */
> +/* #define CONFIG_WATCHDOG */
> +/* #define CONFIG_SUNXI_WATCHDOG */
> +
>  #endif /* __CONFIG_H */


Amicalement,
-- 
Albert.