ARM: EXYNOS: Remove PM initcalls and useless indirection

This patch simplifies Exynos PM initialization and makes it
multiplatform friendly by replacing initcalls used originally to invoke
all the initialization code with explicit function calls.

In addition, an useless subsys_interface is removed, as all its .add_dev
callback did was setting two function pointers.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/common.c

@@ -315,6 +315,7 @@ void __init exynos_init_late(void)
 		return;
 
 	pm_genpd_poweroff_unused();
+	exynos_pm_init();
 }
 
 static int __init exynos_fdt_map_chipid(unsigned long node, const char *uname,

arch/arm/mach-exynos/common.h

@@ -27,6 +27,12 @@ void exynos_init_late(void);
 
 void exynos_firmware_init(void);
 
+#ifdef CONFIG_PM_SLEEP
+extern void __init exynos_pm_init(void);
+#else
+static inline void exynos_pm_init(void) {}
+#endif
+
 extern struct smp_operations exynos_smp_ops;
 
 extern void exynos_cpu_die(unsigned int cpu);

arch/arm/mach-exynos/pm.c

@@ -92,39 +92,6 @@ static void exynos_pm_prepare(void)
 	__raw_writel(virt_to_phys(s3c_cpu_resume), S5P_INFORM0);
 }
 
-static int exynos_pm_add(struct device *dev, struct subsys_interface *sif)
-{
-	pm_cpu_prep = exynos_pm_prepare;
-	pm_cpu_sleep = exynos_cpu_suspend;
-
-	return 0;
-}
-
-static struct subsys_interface exynos_pm_interface = {
-	.name		= "exynos_pm",
-	.subsys		= &exynos_subsys,
-	.add_dev	= exynos_pm_add,
-};
-
-static __init int exynos_pm_drvinit(void)
-{
-	unsigned int tmp;
-
-	if (soc_is_exynos5440())
-		return 0;
-
-	s3c_pm_init();
-
-	/* All wakeup disable */
-
-	tmp = __raw_readl(S5P_WAKEUP_MASK);
-	tmp |= ((0xFF << 8) | (0x1F << 1));
-	__raw_writel(tmp, S5P_WAKEUP_MASK);
-
-	return subsys_interface_register(&exynos_pm_interface);
-}
-arch_initcall(exynos_pm_drvinit);
-
 static int exynos_pm_suspend(void)
 {
 	unsigned long tmp;
@@ -220,12 +187,19 @@ static struct syscore_ops exynos_pm_syscore_ops = {
 	.resume		= exynos_pm_resume,
 };
 
-static __init int exynos_pm_syscore_init(void)
+void __init exynos_pm_init(void)
 {
-	if (soc_is_exynos5440())
-		return 0;
+	u32 tmp;
+
+	pm_cpu_prep = exynos_pm_prepare;
+	pm_cpu_sleep = exynos_cpu_suspend;
+
+	s3c_pm_init();
+
+	/* All wakeup disable */
+	tmp = __raw_readl(S5P_WAKEUP_MASK);
+	tmp |= ((0xFF << 8) | (0x1F << 1));
+	__raw_writel(tmp, S5P_WAKEUP_MASK);
 
 	register_syscore_ops(&exynos_pm_syscore_ops);
-	return 0;
 }
-arch_initcall(exynos_pm_syscore_init);