From 7781e61b5ba09a22e719636ae8b5a3186df438fc Mon Sep 17 00:00:00 2001 From: Florian Fainelli Date: Thu, 2 Feb 2017 12:12:26 -0800 Subject: 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 Reviewed-by: H Hartley Sweeten Signed-off-by: Arnd Bergmann --- arch/arm/mach-ep93xx/include/mach/uncompress.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'arch/arm/mach-ep93xx') 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 +#include 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(); } -- cgit