ARM: EXYNOS: add support get_core_count() for EXYNOS5250

The EXYNOS5250 has two Cortex-A15 cores and there's no
need to call scu_enable() in platform_smp_prepare_cpus()
because Cortex-A15 has no regarding scu register which
can be used for getting number of cores.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/platsmp.c b/arch/arm/mach-exynos/platsmp.c
index 0f2035a1eb6e5f31cf7bdbd16270af5efd4abee4..36c3984aaa47909e5e02b12a317cbe1f373897e2 100644 (file)
--- a/arch/arm/mach-exynos/platsmp.c
+++ b/arch/arm/mach-exynos/platsmp.c
@@ -166,7 +166,10 @@ void __init smp_init_cpus(void)
        void __iomem *scu_base = scu_base_addr();
        unsigned int i, ncores;
 
-       ncores = scu_base ? scu_get_core_count(scu_base) : 1;
+       if (soc_is_exynos5250())
+               ncores = 2;
+       else
+               ncores = scu_base ? scu_get_core_count(scu_base) : 1;
 
        /* sanity check */
        if (ncores > nr_cpu_ids) {
@@ -183,8 +186,8 @@ void __init smp_init_cpus(void)
 
 void __init platform_smp_prepare_cpus(unsigned int max_cpus)
 {
-
-       scu_enable(scu_base_addr());
+       if (!soc_is_exynos5250())
+               scu_enable(scu_base_addr());
 
        /*
         * Write the address of secondary startup into the