Add cpuidle driver for Sunplus SP7021

new file mode 100644
index 0000000..649e953
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) Sunplus Co., Ltd. 2021
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/sunplus/sunplus,idle-state.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sunplus cpuidle state
+
+maintainers:
+  - edwin.chiu <[email protected]>
+
+description: |
+  Sunplus SOC cpuidle state
+
+properties:
+  compatible:
+    const: arm,idle-state
+
+  entry-latency-us:
+    description:
+      Worst case latency in microseconds required to enter the idle state.
+
+  exit-latency-us:
+    description:
+      Worst case latency in microseconds required to exit the idle state.
+      The exit-latency-us duration may be guaranteed only after
+      entry-latency-us has passed.
+
+  min-residency-us:
+    description:
+      Minimum residency duration in microseconds, inclusive of preparation
+      and entry, for this idle state to be considered worthwhile energy wise
+      (refer to section 2 of this document for a complete description).
+
+required:
+  - compatible
+  - entry-latency-us
+  - exit-latency-us
+  - min-residency-us
+
+additionalProperties: true
+
+examples:
+  - |
+    idle-states {
+      CLUSTER_SLEEP_BIG: cluster-sleep-big {
+        compatible = "arm,idle-state";
+        entry-latency-us = <8000>;
+        exit-latency-us = <700>;
+        min-residency-us = <9000>;
+      };
+    };
+
+...

index 3b79fd4..41957c7 100644
@@ -17945,6 +17945,11 @@ L:	[email protected]
 S:	Maintained
 F:	drivers/net/ethernet/dlink/sundance.c
 
+SUNPLUS CPUIDLE DRIVER
+M:	Edwin Chiu <[email protected]>
+S:	Maintained
+F:	Documentation/devicetree/bindings/arm/sunplus/sunplus,idle-state.yaml
+
 SUPERH
 M:	Yoshinori Sato <[email protected]>
 M:	Rich Felker <[email protected]>

index 41957c7..c5eab79 100644
@@ -17949,6 +17949,10 @@ SUNPLUS CPUIDLE DRIVER
 M:	Edwin Chiu <[email protected]>
 S:	Maintained
 F:	Documentation/devicetree/bindings/arm/sunplus/sunplus,idle-state.yaml
+F:	drivers/cpuidle/Kconfig.arm
+F:	drivers/cpuidle/Makefile
+F:	drivers/cpuidle/cpuidle-sunplus.c
+F:	include/linux/platform_data/cpuidle-sunplus.h
 
 SUPERH
 M:	Yoshinori Sato <[email protected]>

index 334f83e..ad9956c 100644
@@ -117,3 +117,10 @@ config ARM_QCOM_SPM_CPUIDLE
 	  The Subsystem Power Manager (SPM) controls low power modes for the
 	  CPU and L2 cores. It interface with various system drivers to put
 	  the cores in low power modes.
+
+config ARM_SUNPLUS_CPUIDLE
+	bool "CPU Idle Driver For SUNPLUS SoCs"
+	depends on !ARM64
+	select DT_IDLE_STATES
+	help
+	  Select this to enable cpuidle on SP7021 processors.

index 26bbc5e..0a020d1 100644
@@ -25,6 +25,7 @@ obj-$(CONFIG_ARM_PSCI_CPUIDLE)		+= cpuidle-psci.o
 obj-$(CONFIG_ARM_PSCI_CPUIDLE_DOMAIN)	+= cpuidle-psci-domain.o
 obj-$(CONFIG_ARM_TEGRA_CPUIDLE)		+= cpuidle-tegra.o
 obj-$(CONFIG_ARM_QCOM_SPM_CPUIDLE)	+= cpuidle-qcom-spm.o
+obj-$(CONFIG_ARM_SUNPLUS_CPUIDLE)		+= cpuidle-sunplus.o
 
 ###############################################################################
 # MIPS drivers