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| author | Reinhard Meyer <u-boot@emk-elektronik.de> | 2010-08-09 13:25:37 +0200 |
|---|---|---|
| committer | Reinhard Meyer <u-boot@emk-elektronik.de> | 2010-09-03 11:21:51 +0200 |
| commit | e0cd44c3c1209c281d67b18372e584b143885303 (patch) | |
| tree | cae3c2e06825899b2b8d0171f924f2aab30d0e7f /arch/arm/cpu/arm926ejs/at91 | |
| parent | 93dfcbe3c89f985ccf7e951506208f5ade21cb78 (diff) | |
| download | u-boot-imx-e0cd44c3c1209c281d67b18372e584b143885303.zip u-boot-imx-e0cd44c3c1209c281d67b18372e584b143885303.tar.gz u-boot-imx-e0cd44c3c1209c281d67b18372e584b143885303.tar.bz2 | |
AT91: reset.c: fix comments, add option
Signed-off-by: Reinhard Meyer <u-boot@emk-elektronik.de>
Diffstat (limited to 'arch/arm/cpu/arm926ejs/at91')
| -rw-r--r-- | arch/arm/cpu/arm926ejs/at91/reset.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/arm/cpu/arm926ejs/at91/reset.c b/arch/arm/cpu/arm926ejs/at91/reset.c index 1b67e77..d2569d8 100644 --- a/arch/arm/cpu/arm926ejs/at91/reset.c +++ b/arch/arm/cpu/arm926ejs/at91/reset.c @@ -27,18 +27,19 @@ #include <asm/arch/at91_rstc.h> #include <asm/arch/io.h> -/* - * Reset the cpu by setting up the watchdog timer and let him time out. - */ +/* Reset the cpu by telling the reset controller to do so */ void reset_cpu(ulong ignored) { at91_rstc_t *rstc = (at91_rstc_t *) AT91_RSTC_BASE; - /* this is the way Linux does it */ - - writel(AT91_RSTC_KEY | AT91_RSTC_CR_PROCRST | AT91_RSTC_CR_PERRST, - &rstc->cr); - - while (1); - /* Never reached */ + writel(AT91_RSTC_KEY + | AT91_RSTC_CR_PROCRST /* Processor Reset */ + | AT91_RSTC_CR_PERRST /* Peripheral Reset */ +#ifdef CONFIG_AT91RESET_EXTRST + | AT91_RSTC_CR_EXTRST /* External Reset (assert nRST pin) */ +#endif + , &rstc->cr); + /* never reached */ + while (1) + ; } |