From: Shawn Guo <shawn.guo@linaro.org>
Date: Wed, 9 Oct 2013 07:54:31 +0000 (+0800)
Subject: ARM: imx: reset core along with enable/disable operation
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=6050d181a4fd4abb745506a6e565d55f1f9df964;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

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>
---

diff --git a/arch/arm/mach-imx/src.c b/arch/arm/mach-imx/src.c
index 10a6b1a8c5ac..4754373e7e7d 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);
 }