ARM: shmobile: emev2: Replace modify_scu_cpu_psr with scu_power_mode

We can remove the extra code of modify_scu_cpu_psr() and use the cleaner
generic ARM helper scu_power_mode(). As every CPU only deals with its
own power register and scu_power_mode() operates with 8-bit accesses,
we save the locking overhead too.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

diff --git a/arch/arm/mach-shmobile/smp-emev2.c b/arch/arm/mach-shmobile/smp-emev2.c
index f6745628628003f6f23e5e16c3ea175177f256a6..535426c306bd70e7cae25c24ac550d516005999f 100644 (file)
--- a/arch/arm/mach-shmobile/smp-emev2.c
+++ b/arch/arm/mach-shmobile/smp-emev2.c
@@ -32,24 +32,8 @@
 
 #define EMEV2_SCU_BASE 0x1e000000
 
-static DEFINE_SPINLOCK(scu_lock);
 static void __iomem *scu_base;
 
-static void modify_scu_cpu_psr(unsigned long set, unsigned long clr)
-{
-       unsigned long tmp;
-
-       /* we assume this code is running on a different cpu
-        * than the one that is changing coherency setting */
-       spin_lock(&scu_lock);
-       tmp = readl(scu_base + 8);
-       tmp &= ~clr;
-       tmp |= set;
-       writel(tmp, scu_base + 8);
-       spin_unlock(&scu_lock);
-
-}
-
 static unsigned int __init emev2_get_core_count(void)
 {
        if (!scu_base) {
@@ -95,7 +79,7 @@ static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct *
        cpu = cpu_logical_map(cpu);
 
        /* enable cache coherency */
-       modify_scu_cpu_psr(0, 3 << (cpu * 8));
+       scu_power_mode(scu_base, 0);
 
        /* Tell ROM loader about our vector (in headsmp.S) */
        emev2_set_boot_vector(__pa(shmobile_secondary_vector));
@@ -106,12 +90,10 @@ static int __cpuinit emev2_boot_secondary(unsigned int cpu, struct task_struct *
 
 static void __init emev2_smp_prepare_cpus(unsigned int max_cpus)
 {
-       int cpu = cpu_logical_map(0);
-
        scu_enable(scu_base);
 
        /* enable cache coherency on CPU0 */
-       modify_scu_cpu_psr(0, 3 << (cpu * 8));
+       scu_power_mode(scu_base, 0);
 }
 
 static void __init emev2_smp_init_cpus(void)