# 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 <[email protected]>
- Sascha Hauer <[email protected]>
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:
- 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]+$":
properties:
fsl,weim-cs-timing:
items:
- description: CSCRxU
- description: CSCRxL
- description: CSCRxA
- if:
properties:
compatible:
contains:
enum:
- fsl,imx50-weim
- fsl,imx51-weim
- fsl,imx6q-weim
- fsl,imx6sx-weim
- fsl,imx6ul-weim
then:
patternProperties:
"^.*@[0-7],[0-9a-f]+$":
properties:
fsl,weim-cs-timing:
items:
- 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>;
};
};
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