ARM: EXYNOS: Add generic cluster power control functions

Add generic cluster power control functions for exynos based SoCS
for cluster power up/down and to know the cluster status.

Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 39 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index 4d815a511bc1..7876ed04b7a5 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -66,5 +66,8 @@ extern void exynos_sys_powerdown_conf(enum sys_powerdown mode);
 extern void exynos_cpu_power_down(int cpu);
 extern void exynos_cpu_power_up(int cpu);
 extern int  exynos_cpu_power_state(int cpu);
+extern void exynos_cluster_power_down(int cluster);
+extern void exynos_cluster_power_up(int cluster);
+extern int  exynos_cluster_power_state(int cluster);
 
 #endif /* __ARCH_ARM_MACH_EXYNOS_COMMON_H */
diff --git a/arch/arm/mach-exynos/pm.c b/arch/arm/mach-exynos/pm.c
index cbfe23598236..3f2ae864582e 100644
--- a/arch/arm/mach-exynos/pm.c
+++ b/arch/arm/mach-exynos/pm.c
@@ -136,6 +136,36 @@ int exynos_cpu_power_state(int cpu)
                         S5P_CORE_LOCAL_PWR_EN);
 }
 
+/**
+ * exynos_cluster_power_down : power down the specified cluster
+ * @cluster : the cluster to power down
+ */
+void exynos_cluster_power_down(int cluster)
+{
+        __raw_writel(0, EXYNOS_COMMON_CONFIGURATION(cluster));
+}
+
+/**
+ * exynos_cluster_power_up : power up the specified cluster
+ * @cluster : the cluster to power up
+ */
+void exynos_cluster_power_up(int cluster)
+{
+        __raw_writel(S5P_CORE_LOCAL_PWR_EN,
+                     EXYNOS_COMMON_CONFIGURATION(cluster));
+}
+
+/**
+ * exynos_cluster_power_state : returns the power state of the cluster
+ * @cluster : the cluster to retrieve the power state from
+ *
+ */
+int exynos_cluster_power_state(int cluster)
+{
+        return (__raw_readl(EXYNOS_COMMON_STATUS(cluster)) &
+                        S5P_CORE_LOCAL_PWR_EN);
+}
+
 /* For Cortex-A9 Diagnostic and Power control register */
 static unsigned int save_arm_register[2];
 
diff --git a/arch/arm/mach-exynos/regs-pmu.h b/arch/arm/mach-exynos/regs-pmu.h
index 98fb8d8715e6..f6b68a327586 100644
--- a/arch/arm/mach-exynos/regs-pmu.h
+++ b/arch/arm/mach-exynos/regs-pmu.h
@@ -111,6 +111,12 @@
 #define EXYNOS_ARM_CORE_STATUS(_nr)             \
                         (EXYNOS_ARM_CORE_CONFIGURATION(_nr) + 0x4)
 
+#define EXYNOS_ARM_COMMON_CONFIGURATION         S5P_PMUREG(0x2500)
+#define EXYNOS_COMMON_CONFIGURATION(_nr)        \
+                        (EXYNOS_ARM_COMMON_CONFIGURATION + (0x80 * (_nr)))
+#define EXYNOS_COMMON_STATUS(_nr)               \
+                        (EXYNOS_COMMON_CONFIGURATION(_nr) + 0x4)
+
 #define S5P_PAD_RET_MAUDIO_OPTION               S5P_PMUREG(0x3028)
 #define S5P_PAD_RET_GPIO_OPTION                 S5P_PMUREG(0x3108)
 #define S5P_PAD_RET_UART_OPTION                 S5P_PMUREG(0x3128)