[RFC PATCH 2/4] ARM: EXYNOS4: Fix to work with origen boards.

[amit.kachhap@linaro.org (Amit Daniel Kachhap)]

This adds a function to get the revision id.

Signed-off-by: Jaecheol Lee <jc.lee@samsung.com>
Signed-off-by: Changhwan Youn <chaos.youn@samsung.com>
---
 arch/arm/mach-exynos4/cpu.c              |   10 ++++++++++
 arch/arm/plat-s5p/include/plat/exynos4.h |    1 +
 2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-exynos4/cpu.c b/arch/arm/mach-exynos4/cpu.c
index 2d8a40c..8b106b8 100644
--- a/arch/arm/mach-exynos4/cpu.c
+++ b/arch/arm/mach-exynos4/cpu.c
@@ -234,6 +234,16 @@ static int __init exynos4_l2x0_cache_init(void)
 early_initcall(exynos4_l2x0_cache_init);
 #endif
 
+int exynos4_subrev(void)
+{
+	static int subrev = -1;
+
+	if (unlikely(subrev < 0))
+		subrev = readl(S5P_VA_CHIPID) & 0xf;
+
+	return subrev;
+}
+
 int __init exynos4_init(void)
 {
 	printk(KERN_INFO "EXYNOS4: Initializing architecture\n");
diff --git a/arch/arm/plat-s5p/include/plat/exynos4.h b/arch/arm/plat-s5p/include/plat/exynos4.h
index 907caab..d62f7f7 100644
--- a/arch/arm/plat-s5p/include/plat/exynos4.h
+++ b/arch/arm/plat-s5p/include/plat/exynos4.h
@@ -15,6 +15,7 @@
 extern void exynos4_common_init_uarts(struct s3c2410_uartcfg *cfg, int no);
 extern void exynos4_register_clocks(void);
 extern void exynos4_setup_clocks(void);
+extern int exynos4_subrev(void);
 
 #ifdef CONFIG_CPU_EXYNOS4210
 
-- 
1.7.1