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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
commit | b4b7ff4b08e691656c9d77c758fc355833128ac0 (patch) | |
tree | 82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /Documentation/devicetree/bindings/board | |
parent | 35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff) |
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'Documentation/devicetree/bindings/board')
-rw-r--r-- | Documentation/devicetree/bindings/board/fsl-board.txt | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/board/fsl-board.txt b/Documentation/devicetree/bindings/board/fsl-board.txt new file mode 100644 index 000000000..fb7b03ec2 --- /dev/null +++ b/Documentation/devicetree/bindings/board/fsl-board.txt @@ -0,0 +1,112 @@ +Freescale Reference Board Bindings + +This document describes device tree bindings for various devices that +exist on some Freescale reference boards. + +* Board Control and Status (BCSR) + +Required properties: + + - compatible : Should be "fsl,<board>-bcsr" + - reg : Offset and length of the register set for the device + +Example: + + bcsr@f8000000 { + compatible = "fsl,mpc8360mds-bcsr"; + reg = <f8000000 8000>; + }; + +* Freescale on-board FPGA + +This is the memory-mapped registers for on board FPGA. + +Required properties: +- compatible: should be a board-specific string followed by a string + indicating the type of FPGA. Example: + "fsl,<board>-fpga", "fsl,fpga-pixis", or + "fsl,<board>-fpga", "fsl,fpga-qixis" +- reg: should contain the address and the length of the FPGA register set. + +Optional properties: +- interrupt-parent: should specify phandle for the interrupt controller. +- interrupts: should specify event (wakeup) IRQ. + +Example (P1022DS): + + board-control@3,0 { + compatible = "fsl,p1022ds-fpga", "fsl,fpga-ngpixis"; + reg = <3 0 0x30>; + interrupt-parent = <&mpic>; + interrupts = <8 8 0 0>; + }; + +Example (LS2080A-RDB): + + cpld@3,0 { + compatible = "fsl,ls2080ardb-fpga", "fsl,fpga-qixis"; + reg = <0x3 0 0x10000>; + }; + +* Freescale BCSR GPIO banks + +Some BCSR registers act as simple GPIO controllers, each such +register can be represented by the gpio-controller node. + +Required properities: +- compatible : Should be "fsl,<board>-bcsr-gpio". +- reg : Should contain the address and the length of the GPIO bank + register. +- #gpio-cells : Should be two. The first cell is the pin number and the + second cell is used to specify optional parameters (currently unused). +- gpio-controller : Marks the port as GPIO controller. + +Example: + + bcsr@1,0 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "fsl,mpc8360mds-bcsr"; + reg = <1 0 0x8000>; + ranges = <0 1 0 0x8000>; + + bcsr13: gpio-controller@d { + #gpio-cells = <2>; + compatible = "fsl,mpc8360mds-bcsr-gpio"; + reg = <0xd 1>; + gpio-controller; + }; + }; + +* Freescale on-board FPGA connected on I2C bus + +Some Freescale boards like BSC9132QDS have on board FPGA connected on +the i2c bus. + +Required properties: +- compatible: Should be a board-specific string followed by a string + indicating the type of FPGA. Example: + "fsl,<board>-fpga", "fsl,fpga-qixis-i2c" +- reg: Should contain the address of the FPGA + +Example: + fpga: fpga@66 { + compatible = "fsl,bsc9132qds-fpga", "fsl,fpga-qixis-i2c"; + reg = <0x66>; + }; + +* Freescale on-board CPLD + +Some Freescale boards like T1040RDB have an on board CPLD connected. + +Required properties: +- compatible: Should be a board-specific string like "fsl,<board>-cpld" + Example: + "fsl,t1040rdb-cpld", "fsl,t1042rdb-cpld", "fsl,t1042rdb_pi-cpld" +- reg: should describe CPLD registers + +Example: + cpld@3,0 { + compatible = "fsl,t1040rdb-cpld"; + reg = <3 0 0x300>; + }; |