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

Message ID 1381305843-26478-1-git-send-email-shawn.guo@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Shawn Guo Oct. 9, 2013, 8:04 a.m. UTC 
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>
---
 arch/arm/mach-imx/src.c |    1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/arch/arm/mach-imx/src.c b/arch/arm/mach-imx/src.c
index 10a6b1a..4754373 100644
--- a/arch/arm/mach-imx/src.c
+++ b/arch/arm/mach-imx/src.c
@@ -91,6 +91,7 @@  void imx_enable_cpu(int cpu, bool enable)
 	spin_lock(&scr_lock);
 	val = readl_relaxed(src_base + SRC_SCR);
 	val = enable ? val | mask : val & ~mask;
+	val |= 1 << (BP_SRC_SCR_CORE1_RST + cpu - 1);
 	writel_relaxed(val, src_base + SRC_SCR);
 	spin_unlock(&scr_lock);
 }