Documentation/devicetree/bindings/reset/zynq-reset.txt

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/reset/zynq-reset.txt

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System
Linux kernel
Corpus path
Documentation/devicetree/bindings/reset/zynq-reset.txt
Extension
.txt
Size
1385 bytes
Lines
69
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

Xilinx Zynq Reset Manager

The Zynq AP-SoC has several different resets.

See Chapter 26 of the Zynq TRM (UG585) for more information about Zynq resets.

Required properties:
- compatible: "xlnx,zynq-reset"
- reg: SLCR offset and size taken via syscon <0x200 0x48>
- syscon: <&slcr>
  This should be a phandle to the Zynq's SLCR registers.
- #reset-cells: Must be 1

The Zynq Reset Manager needs to be a childnode of the SLCR.

Example:
	rstc: rstc@200 {
		compatible = "xlnx,zynq-reset";
		reg = <0x200 0x48>;
		#reset-cells = <1>;
		syscon = <&slcr>;
	};

Reset outputs:
 0  : soft reset
 32 : ddr reset
 64 : topsw reset
 96 : dmac reset
 128: usb0 reset
 129: usb1 reset
 160: gem0 reset
 161: gem1 reset
 164: gem0 rx reset
 165: gem1 rx reset
 166: gem0 ref reset
 167: gem1 ref reset
 192: sdio0 reset
 193: sdio1 reset
 196: sdio0 ref reset
 197: sdio1 ref reset
 224: spi0 reset
 225: spi1 reset
 226: spi0 ref reset
 227: spi1 ref reset
 256: can0 reset
 257: can1 reset
 258: can0 ref reset
 259: can1 ref reset
 288: i2c0 reset
 289: i2c1 reset
 320: uart0 reset
 321: uart1 reset
 322: uart0 ref reset
 323: uart1 ref reset
 352: gpio reset
 384: lqspi reset
 385: qspi ref reset
 416: smc reset
 417: smc ref reset
 448: ocm reset
 512: fpga0 out reset
 513: fpga1 out reset
 514: fpga2 out reset
 515: fpga3 out reset
 544: a9 reset 0
 545: a9 reset 1
 552: peri reset

Annotation

Implementation Notes