mfd: add basic sun6i A31 PRCM support

new file mode 100644
index 0000000..c8f7757
@@ -0,0 +1,21 @@
+Allwinner sunxi Peripheral Reset Controller
+===========================================
+
+Please also refer to reset.txt in this directory for common reset
+controller binding usage.
+
+Required properties:
+- compatible: Should be one of the following:
+  "allwinner,sun6i-a31-ahb1-reset"
+  "allwinner,sun6i-a31-clock-reset"
+- reg: should be register base and length as documented in the
+  datasheet
+- #reset-cells: 1, see below
+
+example:
+
+ahb1_rst: reset at 01c202c0 {
+	#reset-cells = <1>;
+	compatible = "allwinner,sun6i-a31-ahb1-reset";
+	reg = <0x01c202c0 0xc>;
+};

index 6c2a920..34d246f 100644
@@ -731,6 +731,14 @@ config MFD_STA2X11
 	select MFD_CORE
 	select REGMAP_MMIO
 
+config MFD_SUN6I_PRCM
+	bool "Allwinner A31 PRCM controller"
+	depends on ARCH_SUNXI
+	select MFD_CORE
+	help
+	  Support for the PRCM (Power/Reset/Clock Management) unit available
+	  in A31 SoC.
+
 config MFD_SYSCON
 	bool "System Controller Register R/W Based on Regmap"
 	select REGMAP_MMIO

index 1efecf2..df7823c 100644
@@ -29,6 +29,7 @@ obj-$(CONFIG_MFD_STA2X11)	+= sta2x11-mfd.o
 obj-$(CONFIG_MFD_STMPE)		+= stmpe.o
 obj-$(CONFIG_STMPE_I2C)		+= stmpe-i2c.o
 obj-$(CONFIG_STMPE_SPI)		+= stmpe-spi.o
+obj-$(CONFIG_MFD_SUN6I_PRCM)	+= sun6i-prcm.o
 obj-$(CONFIG_MFD_TC3589X)	+= tc3589x.o
 obj-$(CONFIG_MFD_T7L66XB)	+= t7l66xb.o tmio_core.o
 obj-$(CONFIG_MFD_TC6387XB)	+= tc6387xb.o tmio_core.o

new file mode 100644
index 0000000..1f5a31f
@@ -0,0 +1,59 @@
+* Allwinner PRCM (Power/Reset/Clock Management) Multi-Functional Device
+
+PRCM is an MFD device exposing several Power Management related devices
+(like clks and reset controllers).
+
+Required properties:
+ - compatible: "allwinner,sun6i-a31-prcm"
+ - reg: The PRCM registers range
+
+The prcm node may contain several subdevices definitions:
+ - see Documentation/devicetree/clk/sunxi.txt for clock devices
+ - see Documentation/devicetree/reset/allwinner,sunxi-clock-reset.txt for reset
+   controller devices
+
+
+Example:
+
+	prcm: prcm at 01f01400 {
+		compatible = "allwinner,sun6i-a31-prcm";
+		reg = <0x01f01400 0x200>;
+
+		/* Put subdevices here */
+		ar100: ar100_clk {
+			compatible = "allwinner,sun6i-a31-ar100-clk";
+			#clock-cells = <0>;
+			clocks = <&osc32k>, <&osc24M>, <&pll6>, <&pll6>;
+		};
+
+		ahb0: ahb0_clk {
+			compatible = "fixed-factor-clock";
+			#clock-cells = <0>;
+			clock-div = <1>;
+			clock-mult = <1>;
+			clocks = <&ar100_div>;
+			clock-output-names = "ahb0";
+		};
+
+		apb0: apb0_clk {
+			compatible = "allwinner,sun6i-a31-apb0-clk";
+			#clock-cells = <0>;
+			clocks = <&ahb0>;
+			clock-output-names = "apb0";
+		};
+
+		apb0_gates: apb0_gates_clk {
+			compatible = "allwinner,sun6i-a31-apb0-gates-clk";
+			#clock-cells = <1>;
+			clocks = <&apb0>;
+			clock-output-names = "apb0_pio", "apb0_ir",
+					"apb0_timer01", "apb0_p2wi",
+					"apb0_uart", "apb0_1wire",
+					"apb0_i2c";
+		};
+
+		apb0_rst: apb0_rst {
+			compatible = "allwinner,sun6i-a31-clock-reset";
+			#reset-cells = <1>;
+		};
+	};

index 3aff966..0fbd4f1 100644
@@ -23,6 +23,7 @@ config MACH_SUN6I
 	default ARCH_SUNXI
 	select ARCH_HAS_RESET_CONTROLLER
 	select ARM_GIC
+	select MFD_SUN6I_PRCM
 	select RESET_CONTROLLER
 	select SUN5I_HSTIMER
 

index b5bac91..3d6c124 100644
@@ -3,3 +3,5 @@
 #
 
 obj-y += clk-sunxi.o clk-factors.o
+
+obj-$(CONFIG_MFD_SUN6I_PRCM) += clk-sun6i-ar100.o clk-sun6i-apb0.o clk-sun6i-apb0-gates.o

index a5160d8..ffa1ab1 100644
@@ -20,12 +20,15 @@ Required properties:
 	"allwinner,sun5i-a13-ahb-gates-clk" - for the AHB gates on A13
 	"allwinner,sun5i-a10s-ahb-gates-clk" - for the AHB gates on A10s
 	"allwinner,sun7i-a20-ahb-gates-clk" - for the AHB gates on A20
+	"allwinner,sun6i-a31-ar100-clk" - for the AR100 on A31
 	"allwinner,sun6i-a31-ahb1-mux-clk" - for the AHB1 multiplexer on A31
 	"allwinner,sun6i-a31-ahb1-gates-clk" - for the AHB1 gates on A31
 	"allwinner,sun4i-a10-apb0-clk" - for the APB0 clock
+	"allwinner,sun6i-a31-apb0-clk" - for the APB0 clock on A31
 	"allwinner,sun4i-a10-apb0-gates-clk" - for the APB0 gates on A10
 	"allwinner,sun5i-a13-apb0-gates-clk" - for the APB0 gates on A13
 	"allwinner,sun5i-a10s-apb0-gates-clk" - for the APB0 gates on A10s
+	"allwinner,sun6i-a31-apb0-gates-clk" - for the APB0 gates on A31
 	"allwinner,sun7i-a20-apb0-gates-clk" - for the APB0 gates on A20
 	"allwinner,sun4i-a10-apb1-clk" - for the APB1 clock
 	"allwinner,sun4i-a10-apb1-mux-clk" - for the APB1 clock muxing

index eec1afa..730ffd99 100644
@@ -602,6 +602,44 @@
 		prcm at 01f01400 {
 			compatible = "allwinner,sun6i-a31-prcm";
 			reg = <0x01f01400 0x200>;
+
+			ar100: ar100_clk {
+				compatible = "allwinner,sun6i-a31-ar100-clk";
+				#clock-cells = <0>;
+				clocks = <&osc32k>, <&osc24M>, <&pll6>, <&pll6>;
+				clock-output-names = "ar100";
+			};
+
+			ahb0: ahb0_clk {
+				compatible = "fixed-factor-clock";
+				#clock-cells = <0>;
+				clock-div = <1>;
+				clock-mult = <1>;
+				clocks = <&ar100>;
+				clock-output-names = "ahb0";
+			};
+
+			apb0: apb0_clk {
+				compatible = "allwinner,sun6i-a31-apb0-clk";
+				#clock-cells = <0>;
+				clocks = <&ahb0>;
+				clock-output-names = "apb0";
+			};
+
+			apb0_gates: apb0_gates_clk {
+				compatible = "allwinner,sun6i-a31-apb0-gates-clk";
+				#clock-cells = <1>;
+				clocks = <&apb0>;
+				clock-output-names = "apb0_pio", "apb0_ir",
+						"apb0_timer", "apb0_p2wi",
+						"apb0_uart", "apb0_1wire",
+						"apb0_i2c";
+			};
+
+			apb0_rst: apb0_rst {
+				compatible = "allwinner,sun6i-a31-clock-reset";
+				#reset-cells = <1>;
+			};
 		};
 
 		cpucfg at 01f01c00 {