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Diffstat (limited to 'dts/Bindings/memory-controllers/fsl/fsl,imx-weim.yaml')
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1 files changed, 204 insertions, 0 deletions
diff --git a/dts/Bindings/memory-controllers/fsl/fsl,imx-weim.yaml b/dts/Bindings/memory-controllers/fsl/fsl,imx-weim.yaml new file mode 100644 index 0000000000..3f40ca5b13 --- /dev/null +++ b/dts/Bindings/memory-controllers/fsl/fsl,imx-weim.yaml @@ -0,0 +1,204 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/memory-controllers/fsl/fsl,imx-weim.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: i.MX Wireless External Interface Module (WEIM) + +maintainers: + - Shawn Guo <shawnguo@kernel.org> + - Sascha Hauer <s.hauer@pengutronix.de> + +description: + The term "wireless" does not imply that the WEIM is literally an interface + without wires. It simply means that this module was originally designed for + wireless and mobile applications that use low-power technology. The actual + devices are instantiated from the child nodes of a WEIM node. + +properties: + $nodename: + pattern: "^memory-controller@[0-9a-f]+$" + + compatible: + oneOf: + - enum: + - fsl,imx1-weim + - fsl,imx27-weim + - fsl,imx50-weim + - fsl,imx51-weim + - fsl,imx6q-weim + - items: + - enum: + - fsl,imx31-weim + - fsl,imx35-weim + - const: fsl,imx27-weim + - items: + - enum: + - fsl,imx6sx-weim + - fsl,imx6ul-weim + - const: fsl,imx6q-weim + + "#address-cells": + const: 2 + + "#size-cells": + const: 1 + + reg: + maxItems: 1 + + clocks: + maxItems: 1 + + interrupts: + maxItems: 1 + + ranges: true + + fsl,weim-cs-gpr: + $ref: /schemas/types.yaml#/definitions/phandle + description: | + Phandle to the system General Purpose Register controller that contains + WEIM CS GPR register, e.g. IOMUXC_GPR1 on i.MX6Q. IOMUXC_GPR1[11:0] + should be set up as one of the following 4 possible values depending on + the CS space configuration. + + IOMUXC_GPR1[11:0] CS0 CS1 CS2 CS3 + --------------------------------------------- + 05 128M 0M 0M 0M + 033 64M 64M 0M 0M + 0113 64M 32M 32M 0M + 01111 32M 32M 32M 32M + + In case that the property is absent, the reset value or what bootloader + sets up in IOMUXC_GPR1[11:0] will be used. + + fsl,burst-clk-enable: + type: boolean + description: + The presence of this property indicates that the weim bus should operate + in Burst Clock Mode. + + fsl,continuous-burst-clk: + type: boolean + description: + Make Burst Clock to output continuous clock. Without this option Burst + Clock will output clock only when necessary. + +patternProperties: + "^.*@[0-7],[0-9a-f]+$": + type: object + description: Devices attached to chip selects are represented as subnodes. + $ref: fsl,imx-weim-peripherals.yaml + additionalProperties: true + required: + - fsl,weim-cs-timing + +required: + - compatible + - reg + - clocks + - "#address-cells" + - "#size-cells" + - ranges + +allOf: + - if: + properties: + compatible: + not: + contains: + enum: + - fsl,imx50-weim + - fsl,imx6q-weim + then: + properties: + fsl,weim-cs-gpr: false + fsl,burst-clk-enable: false + - if: + not: + required: + - fsl,burst-clk-enable + then: + properties: + fsl,continuous-burst-clk: false + - if: + properties: + compatible: + contains: + const: fsl,imx1-weim + then: + patternProperties: + "^.*@[0-7],[0-9a-f]+$": + properties: + fsl,weim-cs-timing: + items: + items: + - description: CSxU + - description: CSxL + - if: + properties: + compatible: + contains: + enum: + - fsl,imx27-weim + - fsl,imx31-weim + - fsl,imx35-weim + then: + patternProperties: + "^.*@[0-7],[0-9a-f]+$": + properties: + fsl,weim-cs-timing: + items: + items: + - description: CSCRxU + - description: CSCRxL + - description: CSCRxA + - if: + properties: + compatible: + contains: + enum: + - fsl,imx50-weim + - fsl,imx51-weim + - fsl,imx6q-weim + - fsl,imx6sx-weim + - fsl,imx6ul-weim + then: + patternProperties: + "^.*@[0-7],[0-9a-f]+$": + properties: + fsl,weim-cs-timing: + items: + items: + - description: CSxGCR1 + - description: CSxGCR2 + - description: CSxRCR1 + - description: CSxRCR2 + - description: CSxWCR1 + - description: CSxWCR2 + +additionalProperties: false + +examples: + - | + memory-controller@21b8000 { + compatible = "fsl,imx6q-weim"; + reg = <0x021b8000 0x4000>; + clocks = <&clks 196>; + #address-cells = <2>; + #size-cells = <1>; + ranges = <0 0 0x08000000 0x08000000>; + fsl,weim-cs-gpr = <&gpr>; + + flash@0,0 { + compatible = "cfi-flash"; + reg = <0 0 0x02000000>; + #address-cells = <1>; + #size-cells = <1>; + bank-width = <2>; + fsl,weim-cs-timing = <0x00620081 0x00000001 0x1c022000 + 0x0000c000 0x1404a38e 0x00000000>; + }; + }; |