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ARM: imx: reset core along with enable/disable operation 

From hotplug stress test result, resetting core during enable/disable
operation can improve cpu hotplug stability.  So let's set
SRC reset bit in imx_enable_cpu() for the core when its enable bit is
accessed.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This commit is contained in:
Shawn Guo 2013-10-09 15:54:31 +08:00
parent fcd75f921d
commit 6050d181a4
1 changed files with 1 additions and 0 deletions
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1
arch/arm/mach-imx/src.c
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@ -91,6 +91,7 @@ void imx_enable_cpu(int cpu, bool enable)
spin_lock(&scr_lock); spin_lock(&scr_lock);
val = readl_relaxed(src_base + SRC_SCR); val = readl_relaxed(src_base + SRC_SCR);
val = enable ? val | mask : val & ~mask; val = enable ? val | mask : val & ~mask;
val |= 1 << (BP_SRC_SCR_CORE1_RST + cpu - 1);
writel_relaxed(val, src_base + SRC_SCR); writel_relaxed(val, src_base + SRC_SCR);
spin_unlock(&scr_lock); spin_unlock(&scr_lock);
} }