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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>
hifive-unleashed-5.1
Florian Fainelli 2017-02-02 12:12:26 -08:00 committed by Arnd Bergmann
parent 4b483ed0be
commit 7781e61b5b
1 changed files with 12 additions and 0 deletions
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12
arch/arm/mach-ep93xx/include/mach/uncompress.h
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@ -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();
}