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authorSascha Hauer <s.hauer@pengutronix.de>2023-03-15 10:57:00 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2023-03-15 13:24:47 +0100
commit03b1dd74aa6e8307dde254efe7f1450630362a8a (patch)
tree66ee5ede9991313a2ce7a9171d51312ffd9d9a26 /dts/Bindings/bus/intel,ixp4xx-expansion-bus-controller.yaml
parentdd86cdf21582baec789488301b881f8b183cbdfa (diff)
downloadbarebox-03b1dd74aa6e8307dde254efe7f1450630362a8a.tar.gz
barebox-03b1dd74aa6e8307dde254efe7f1450630362a8a.tar.xz
dts: update to v6.3-rc1
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'dts/Bindings/bus/intel,ixp4xx-expansion-bus-controller.yaml')
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-# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
-%YAML 1.2
----
-$id: http://devicetree.org/schemas/bus/intel,ixp4xx-expansion-bus-controller.yaml#
-$schema: http://devicetree.org/meta-schemas/core.yaml#
-
-title: Intel IXP4xx Expansion Bus Controller
-
-description: |
- The IXP4xx expansion bus controller handles access to devices on the
- memory-mapped expansion bus on the Intel IXP4xx family of system on chips,
- including IXP42x, IXP43x, IXP45x and IXP46x.
-
-maintainers:
- - Linus Walleij <linus.walleij@linaro.org>
-
-properties:
- $nodename:
- pattern: '^bus@[0-9a-f]+$'
-
- compatible:
- items:
- - enum:
- - intel,ixp42x-expansion-bus-controller
- - intel,ixp43x-expansion-bus-controller
- - intel,ixp45x-expansion-bus-controller
- - intel,ixp46x-expansion-bus-controller
- - const: syscon
-
- reg:
- description: Control registers for the expansion bus, these are not
- inside the memory range handled by the expansion bus.
- maxItems: 1
-
- native-endian:
- $ref: /schemas/types.yaml#/definitions/flag
- description: The IXP4xx has a peculiar MMIO access scheme, as it changes
- the access pattern for words (swizzling) on the bus depending on whether
- the SoC is running in big-endian or little-endian mode. Thus the
- registers must always be accessed using native endianness.
-
- "#address-cells":
- description: |
- The first cell is the chip select number.
- The second cell is the address offset within the bank.
- const: 2
-
- "#size-cells":
- const: 1
-
- ranges: true
- dma-ranges: true
-
-patternProperties:
- "^.*@[0-7],[0-9a-f]+$":
- description: Devices attached to chip selects are represented as
- subnodes.
- type: object
-
- properties:
- intel,ixp4xx-eb-t1:
- description: Address timing, extend address phase with n cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- maximum: 3
-
- intel,ixp4xx-eb-t2:
- description: Setup chip select timing, extend setup phase with n cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- maximum: 3
-
- intel,ixp4xx-eb-t3:
- description: Strobe timing, extend strobe phase with n cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- maximum: 15
-
- intel,ixp4xx-eb-t4:
- description: Hold timing, extend hold phase with n cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- maximum: 3
-
- intel,ixp4xx-eb-t5:
- description: Recovery timing, extend recovery phase with n cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- maximum: 15
-
- intel,ixp4xx-eb-cycle-type:
- description: The type of cycles to use on the expansion bus for this
- chip select. 0 = Intel cycles, 1 = Motorola cycles, 2 = HPI cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1, 2]
-
- intel,ixp4xx-eb-byte-access-on-halfword:
- description: Allow byte read access on half word devices.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1]
-
- intel,ixp4xx-eb-hpi-hrdy-pol-high:
- description: Set HPI HRDY polarity to active high when using HPI.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1]
-
- intel,ixp4xx-eb-mux-address-and-data:
- description: Multiplex address and data on the data bus.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1]
-
- intel,ixp4xx-eb-ahb-split-transfers:
- description: Enable AHB split transfers.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1]
-
- intel,ixp4xx-eb-write-enable:
- description: Enable write cycles.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1]
-
- intel,ixp4xx-eb-byte-access:
- description: Expansion bus uses only 8 bits. The default is to use
- 16 bits.
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1]
-
-required:
- - compatible
- - reg
- - native-endian
- - "#address-cells"
- - "#size-cells"
- - ranges
- - dma-ranges
-
-additionalProperties: false
-
-examples:
- - |
- #include <dt-bindings/interrupt-controller/irq.h>
- bus@50000000 {
- compatible = "intel,ixp42x-expansion-bus-controller", "syscon";
- reg = <0xc4000000 0x28>;
- native-endian;
- #address-cells = <2>;
- #size-cells = <1>;
- ranges = <0 0x0 0x50000000 0x01000000>,
- <1 0x0 0x51000000 0x01000000>;
- dma-ranges = <0 0x0 0x50000000 0x01000000>,
- <1 0x0 0x51000000 0x01000000>;
- flash@0,0 {
- compatible = "intel,ixp4xx-flash", "cfi-flash";
- bank-width = <2>;
- reg = <0 0x00000000 0x1000000>;
- intel,ixp4xx-eb-t3 = <3>;
- intel,ixp4xx-eb-cycle-type = <0>;
- intel,ixp4xx-eb-byte-access-on-halfword = <1>;
- intel,ixp4xx-eb-write-enable = <1>;
- intel,ixp4xx-eb-byte-access = <0>;
- };
- serial@1,0 {
- compatible = "exar,xr16l2551", "ns8250";
- reg = <1 0x00000000 0x10>;
- interrupt-parent = <&gpio0>;
- interrupts = <4 IRQ_TYPE_LEVEL_LOW>;
- clock-frequency = <1843200>;
- intel,ixp4xx-eb-t3 = <3>;
- intel,ixp4xx-eb-cycle-type = <1>;
- intel,ixp4xx-eb-write-enable = <1>;
- intel,ixp4xx-eb-byte-access = <1>;
- };
- };