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@xxxxxxxxxxx>
---
arch/arm/mach-exynos/common.h | 3 +++
arch/arm/mach-exynos/pm.c | 30 ++++++++++++++++++++++++++++++
arch/arm/mach-exynos/regs-pmu.h | 6 ++++++
3 files changed, 39 insertions(+)
diff --git a/arch/arm/mach-exynos/common.h b/arch/arm/mach-exynos/common.h
index dc6b9a6..af99b4a 100644
--- a/arch/arm/mach-exynos/common.h
+++ b/arch/arm/mach-exynos/common.h
@@ -64,5 +64,8 @@ extern void exynos_sys_powerdown_conf(enum sys_powerdown mode);
extern void exynos_cpu_powerdown(int cpu);
extern void exynos_cpu_powerup(int cpu);
extern int exynos_cpu_power_state(int cpu);
+extern void exynos_cluster_powerdown(int cluster);
+extern void exynos_cluster_powerup(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 6651028..f02d864 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_common_powerdown : power down the specified cluster
+ * @cluster : the cluster to power down
+ */
+void exynos_cluster_powerdown(int cluster)
+{
+ __raw_writel(0, EXYNOS_COMMON_CONFIGURATION(cluster));
+}
+
+/**
+ * exynos_cluster_powerup : power up the specified cluster
+ * @cluster : the cluster to power up
+ */
+void exynos_cluster_powerup(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 0bdfcbc..6685ebf 100644
--- a/arch/arm/mach-exynos/regs-pmu.h
+++ b/arch/arm/mach-exynos/regs-pmu.h
@@ -127,6 +127,12 @@
#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)
+
/* Only for EXYNOS4210 */
#define S5P_CMU_CLKSTOP_LCD1_LOWPWR S5P_PMUREG(0x1154)
#define S5P_CMU_RESET_LCD1_LOWPWR S5P_PMUREG(0x1174)
--
1.8.3.2
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