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Subject[PATCH] ARM: ep93xx: Disable TS-72xx watchdog before uncompressing
Date
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>
---
arch/arm/mach-ep93xx/include/mach/uncompress.h | 12 ++++++++++++
1 file changed, 12 insertions(+)

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();
}
--
2.9.3
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