Merge tag 'metag-for-v3.12' of git://git.kernel.org/pub/scm/linux/ker…

…nel/git/jhogan/metag

Pull metag architecture changes from James Hogan:
 - Device tree updates for TZ1090 GPIO drivers merged via GPIO tree.
 - Add driver for ImgTec PDC irqchip as found in TZ1090 SoC.
 - Add linux-metag mailing list to MAINTAINERS file.

* tag 'metag-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag:
  irq-imgpdc: add ImgTec PDC irqchip driver
  MAINTAINERS: add linux-metag mailing list
  metag: tz1090: instantiate gpio-tz1090-pdc
  metag: tz1090: select and instantiate gpio-tz1090
  metag: tz1090: select and instantiate irq-imgpdc

Documentation/devicetree/bindings/metag/pdc-intc.txt

@@ -0,0 +1,105 @@
+* ImgTec Powerdown Controller (PDC) Interrupt Controller Binding
+
+This binding specifies what properties must be available in the device tree
+representation of a PDC IRQ controller. This has a number of input interrupt
+lines which can wake the system, and are passed on through output interrupt
+lines.
+
+Required properties:
+
+    - compatible: Specifies the compatibility list for the interrupt controller.
+      The type shall be <string> and the value shall include "img,pdc-intc".
+
+    - reg: Specifies the base PDC physical address(s) and size(s) of the
+      addressable register space. The type shall be <prop-encoded-array>.
+
+    - interrupt-controller: The presence of this property identifies the node
+      as an interrupt controller. No property value shall be defined.
+
+    - #interrupt-cells: Specifies the number of cells needed to encode an
+      interrupt source. The type shall be a <u32> and the value shall be 2.
+
+    - num-perips: Number of waking peripherals.
+
+    - num-syswakes: Number of SysWake inputs.
+
+    - interrupts: List of interrupt specifiers. The first specifier shall be the
+      shared SysWake interrupt, and remaining specifies shall be PDC peripheral
+      interrupts in order.
+
+* Interrupt Specifier Definition
+
+  Interrupt specifiers consists of 2 cells encoded as follows:
+
+    - <1st-cell>: The interrupt-number that identifies the interrupt source.
+                    0-7:  Peripheral interrupts
+                    8-15: SysWake interrupts
+
+    - <2nd-cell>: The level-sense information, encoded using the Linux interrupt
+                  flags as follows (only 4 valid for peripheral interrupts):
+                    0 = none (decided by software)
+                    1 = low-to-high edge triggered
+                    2 = high-to-low edge triggered
+                    3 = both edge triggered
+                    4 = active-high level-sensitive (required for perip irqs)
+                    8 = active-low level-sensitive
+
+* Examples
+
+Example 1:
+
+	/*
+	 * TZ1090 PDC block
+	 */
+	pdc: pdc@0x02006000 {
+		// This is an interrupt controller node.
+		interrupt-controller;
+
+		// Three cells to encode interrupt sources.
+		#interrupt-cells = <2>;
+
+		// Offset address of 0x02006000 and size of 0x1000.
+		reg = <0x02006000 0x1000>;
+
+		// Compatible with Meta hardware trigger block.
+		compatible = "img,pdc-intc";
+
+		// Three peripherals are connected.
+		num-perips = <3>;
+
+		// Four SysWakes are connected.
+		num-syswakes = <4>;
+
+		interrupts = <18 4 /* level */>, /* Syswakes */
+			     <30 4 /* level */>, /* Peripheral 0 (RTC) */
+			     <29 4 /* level */>, /* Peripheral 1 (IR) */
+			     <31 4 /* level */>; /* Peripheral 2 (WDT) */
+	};
+
+Example 2:
+
+	/*
+	 * An SoC peripheral that is wired through the PDC.
+	 */
+	rtc0 {
+		// The interrupt controller that this device is wired to.
+		interrupt-parent = <&pdc>;
+
+		// Interrupt source Peripheral 0
+		interrupts = <0   /* Peripheral 0 (RTC) */
+		              4>  /* IRQ_TYPE_LEVEL_HIGH */
+	};
+
+Example 3:
+
+	/*
+	 * An interrupt generating device that is wired to a SysWake pin.
+	 */
+	touchscreen0 {
+		// The interrupt controller that this device is wired to.
+		interrupt-parent = <&pdc>;
+
+		// Interrupt source SysWake 0 that is active-low level-sensitive
+		interrupts = <8 /* SysWake0 */
+			      8 /* IRQ_TYPE_LEVEL_LOW */>;
+	};

MAINTAINERS

@@ -5442,6 +5442,7 @@ F:	drivers/watchdog/mena21_wdt.c
 
 METAG ARCHITECTURE
 M:	James Hogan <james.hogan@imgtec.com>
+L:	linux-metag@vger.kernel.org
 S:	Supported
 F:	arch/metag/
 F:	Documentation/metag/

arch/metag/Kconfig.soc

@@ -16,6 +16,8 @@ config META21_FPGA
 
 config SOC_TZ1090
 	bool "Toumaz Xenif TZ1090 SoC (Comet)"
+	select ARCH_WANT_OPTIONAL_GPIOLIB
+	select IMGPDC_IRQ
 	select METAG_LNKGET_AROUND_CACHE
 	select METAG_META21
 	select METAG_SMP_WRITE_REORDERING

arch/metag/boot/dts/tz1090.dtsi

@@ -8,6 +8,8 @@
 
 #include "skeleton.dtsi"
 
+#include <dt-bindings/interrupt-controller/irq.h>
+
 / {
 	compatible = "toumaz,tz1090", "img,meta";
 
@@ -26,6 +28,22 @@
 		#size-cells = <1>;
 		ranges;
 
+		pdc: pdc@0x02006000 {
+			interrupt-controller;
+			#interrupt-cells = <2>;
+
+			reg = <0x02006000 0x1000>;
+			compatible = "img,pdc-intc";
+
+			num-perips = <3>;
+			num-syswakes = <3>;
+
+			interrupts = <18 IRQ_TYPE_LEVEL_HIGH>, /* Syswakes */
+			             <30 IRQ_TYPE_LEVEL_HIGH>, /* Perip 0 (RTC) */
+			             <29 IRQ_TYPE_LEVEL_HIGH>, /* Perip 1 (IR) */
+			             <31 IRQ_TYPE_LEVEL_HIGH>; /* Perip 2 (WDT) */
+		};
+
 		pinctrl: pinctrl@02005800 {
 			#gpio-range-cells = <3>;
 			compatible = "img,tz1090-pinctrl";
@@ -37,5 +55,54 @@
 			compatible = "img,tz1090-pdc-pinctrl";
 			reg = <0x02006500 0x100>;
 		};
+
+		gpios: gpios@02005800 {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			compatible = "img,tz1090-gpio";
+			reg = <0x02005800 0x90>;
+
+			gpios0: bank@0 {
+				gpio-controller;
+				interrupt-controller;
+				#gpio-cells = <2>;
+				#interrupt-cells = <2>;
+				reg = <0>;
+				interrupts = <13 IRQ_TYPE_LEVEL_HIGH>;
+				gpio-ranges = <&pinctrl 0 0 30>;
+			};
+			gpios1: bank@1 {
+				gpio-controller;
+				interrupt-controller;
+				#gpio-cells = <2>;
+				#interrupt-cells = <2>;
+				reg = <1>;
+				interrupts = <14 IRQ_TYPE_LEVEL_HIGH>;
+				gpio-ranges = <&pinctrl 0 30 30>;
+			};
+			gpios2: bank@2 {
+				gpio-controller;
+				interrupt-controller;
+				#gpio-cells = <2>;
+				#interrupt-cells = <2>;
+				reg = <2>;
+				interrupts = <15 IRQ_TYPE_LEVEL_HIGH>;
+				gpio-ranges = <&pinctrl 0 60 30>;
+			};
+		};
+
+		pdc_gpios: gpios@02006500 {
+			gpio-controller;
+			#gpio-cells = <2>;
+
+			compatible = "img,tz1090-pdc-gpio";
+			reg = <0x02006500 0x100>;
+
+			interrupt-parent = <&pdc>;
+			interrupts =	<8  IRQ_TYPE_NONE>,
+					<9  IRQ_TYPE_NONE>,
+					<10 IRQ_TYPE_NONE>;
+			gpio-ranges = <&pdc_pinctrl 0 0 7>;
+		};
 	};
 };

drivers/irqchip/Kconfig

@@ -30,6 +30,11 @@ config ARM_VIC_NR
 	  The maximum number of VICs available in the system, for
 	  power management.
 
+config IMGPDC_IRQ
+	bool
+	select GENERIC_IRQ_CHIP
+	select IRQ_DOMAIN
+
 config ORION_IRQCHIP
 	bool
 	select IRQ_DOMAIN

drivers/irqchip/Makefile

@@ -14,6 +14,7 @@ obj-$(CONFIG_ARCH_SPEAR3XX)		+= spear-shirq.o
 obj-$(CONFIG_ARM_GIC)			+= irq-gic.o
 obj-$(CONFIG_ARM_NVIC)			+= irq-nvic.o
 obj-$(CONFIG_ARM_VIC)			+= irq-vic.o
+obj-$(CONFIG_IMGPDC_IRQ)		+= irq-imgpdc.o
 obj-$(CONFIG_SIRF_IRQ)			+= irq-sirfsoc.o
 obj-$(CONFIG_RENESAS_INTC_IRQPIN)	+= irq-renesas-intc-irqpin.o
 obj-$(CONFIG_RENESAS_IRQC)		+= irq-renesas-irqc.o