[PATCH] arm/orion5x: Fix soft-reset for some platforms
From: benh@kernel.crashing.org (Benjamin Herrenschmidt)
Date: 2010-05-17 00:27:34
Subsystem:
arm port, arm/marvell dove/mv78xx0/orion soc support, the rest · Maintainers:
Russell King, Andrew Lunn, Sebastian Hesselbarth, Gregory Clement, Linus Torvalds
Some platforms, such as the DNS-323 rev C1 requires the soft reset line to be toggled on and back off for the reset to work. Note: The choice of 200ms delay comes from the 2.6.12 based vendor kernel. for the D-Link DNS323. It seems to be a -lot- though and I had my device working fine with much smaller delays but unless there's an objection, I'd rather stay safe and use the larger value... Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> --- arch/arm/mach-orion5x/include/mach/system.h | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-orion5x/include/mach/system.h b/arch/arm/mach-orion5x/include/mach/system.h
index 60e734c..a1d6e46 100644
--- a/arch/arm/mach-orion5x/include/mach/system.h
+++ b/arch/arm/mach-orion5x/include/mach/system.h@@ -25,6 +25,8 @@ static inline void arch_reset(char mode, const char *cmd) */ orion5x_setbits(RSTOUTn_MASK, (1 << 2)); orion5x_setbits(CPU_SOFT_RESET, 1); + mdelay(200); + orion5x_clrbits(CPU_SOFT_RESET, 1); }