From: Jungseok Lee <jays.lee@samsung.com>
Date: Fri, 24 May 2013 21:33:03 +0000 (+0900)
Subject: ARM: EXYNOS: fix software reset logic for EXYNOS5440 SOC
X-Git-Tag: firefly_0821_release~3680^2~397^2~1^2~1
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=1ba830c9997214a7fbe4d91cf238793764620e3b;p=firefly-linux-kernel-4.4.55.git

ARM: EXYNOS: fix software reset logic for EXYNOS5440 SOC

This patch fixes software reset logic. Software reset applies only to
powered-on domains in SOC because software reset to all domains causes
reboot failure.

Signed-off-by: Jungseok Lee <jays.lee@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---

diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index a2d20120e9fc..027c9e7f0d13 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -326,9 +326,16 @@ void exynos5_restart(char mode, const char *cmd)
 		val = 0x1;
 		addr = EXYNOS_SWRESET;
 	} else if (of_machine_is_compatible("samsung,exynos5440")) {
+		u32 status;
 		np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
+
+		addr = of_iomap(np, 0) + 0xbc;
+		status = __raw_readl(addr);
+
 		addr = of_iomap(np, 0) + 0xcc;
-		val = (0xfff << 20) | (0x1 << 16);
+		val = __raw_readl(addr);
+
+		val = (val & 0xffff0000) | (status & 0xffff);
 	} else {
 		pr_err("%s: cannot support non-DT\n", __func__);
 		return;