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Commit 255ae3fb authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'metag-for-v3.12' of git://git.kernel.org/pub/scm/linux/kernel/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
parents 89c5a946 b6ef9161

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

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* 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

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@@ -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

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@@ -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

+67 −0
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@@ -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

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@@ -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