From: Dima Zavin <dima@android.com>
Date: Wed, 4 Apr 2012 16:27:37 +0000 (-0700)
Subject: ARM: EXYNOS: use chip_id reg in uncompress to select uart base phys
X-Git-Tag: Ubuntu-snapdragon-4.4.0-1050.54~15148^2~2^2~2
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=6aa51068f58022ca616fad40b6773a1de50599f0;p=mirror_ubuntu-artful-kernel.git

ARM: EXYNOS: use chip_id reg in uncompress to select uart base phys

Signed-off-by: Dima Zavin <dima@android.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
---

diff --git a/arch/arm/mach-exynos/include/mach/uncompress.h b/arch/arm/mach-exynos/include/mach/uncompress.h
index 493f4f365ddf..2979995d5a6a 100644
--- a/arch/arm/mach-exynos/include/mach/uncompress.h
+++ b/arch/arm/mach-exynos/include/mach/uncompress.h
@@ -20,9 +20,24 @@ volatile u8 *uart_base;
 
 #include <plat/uncompress.h>
 
+static unsigned int __raw_readl(unsigned int ptr)
+{
+	return *((volatile unsigned int *)ptr);
+}
+
 static void arch_detect_cpu(void)
 {
-	if (machine_is_smdk5250())
+	u32 chip_id = __raw_readl(EXYNOS_PA_CHIPID);
+
+	/*
+	 * product_id is bits 31:12
+	 *    bits 23:20 describe the exynosX family
+	 *
+	 */
+	chip_id >>= 20;
+	chip_id &= 0xf;
+
+	if (chip_id == 0x5)
 		uart_base = (volatile u8 *)EXYNOS5_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);
 	else
 		uart_base = (volatile u8 *)EXYNOS4_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT);