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| author | Florian Fainelli <f.fainelli@gmail.com> | 2017-02-02 12:12:26 -0800 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2017-02-07 16:02:34 +0100 |
| commit | 7781e61b5ba09a22e719636ae8b5a3186df438fc (patch) | |
| tree | 3bf8630eb354191310b637d585f1b8b10173d8a8 /arch/arm/mach-ep93xx/include/mach | |
| parent | 4b483ed0be8b4aa8006300d502148aa4548fb261 (diff) | |
| download | linux-7781e61b5ba09a22e719636ae8b5a3186df438fc.tar.bz2 | |
ARM: ep93xx: Disable TS-72xx watchdog before uncompressing
The TS-72xx/73xx boards have a CPLD watchdog which is configured to
reset the board after 8 seconds, if the kernel is large enough that this
takes about this time to decompress the kernel, we will encounter a
spurious reboot.
Do not pull ts72xx.h, but instead locally define what we need to disable
the watchdog.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arm/mach-ep93xx/include/mach')
| -rw-r--r-- | arch/arm/mach-ep93xx/include/mach/uncompress.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/mach-ep93xx/include/mach/uncompress.h b/arch/arm/mach-ep93xx/include/mach/uncompress.h index 03c42e5400d2..b0cf2de77f81 100644 --- a/arch/arm/mach-ep93xx/include/mach/uncompress.h +++ b/arch/arm/mach-ep93xx/include/mach/uncompress.h @@ -10,6 +10,7 @@ */ #include <mach/ep93xx-regs.h> +#include <asm/mach-types.h> static unsigned char __raw_readb(unsigned int ptr) { @@ -75,8 +76,19 @@ static void ethernet_reset(void) ; } +#define TS72XX_WDT_CONTROL_PHYS_BASE 0x23800000 +#define TS72XX_WDT_FEED_PHYS_BASE 0x23c00000 +#define TS72XX_WDT_FEED_VAL 0x05 + +static void __maybe_unused ts72xx_watchdog_disable(void) +{ + __raw_writeb(TS72XX_WDT_FEED_VAL, TS72XX_WDT_FEED_PHYS_BASE); + __raw_writeb(0, TS72XX_WDT_CONTROL_PHYS_BASE); +} static void arch_decomp_setup(void) { + if (machine_is_ts72xx()) + ts72xx_watchdog_disable(); ethernet_reset(); } |