+++ /dev/null
-Device tree bindings for i.MX Wireless External Interface Module (WEIM)
-
-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.
-
-Required properties:
-
- - compatible: Should contain one of the following:
- "fsl,imx1-weim"
- "fsl,imx27-weim"
- "fsl,imx51-weim"
- "fsl,imx50-weim"
- "fsl,imx6q-weim"
- - reg: A resource specifier for the register space
- (see the example below)
- - clocks: the clock, see the example below.
- - #address-cells: Must be set to 2 to allow memory address translation
- - #size-cells: Must be set to 1 to allow CS address passing
- - ranges: Must be set up to reflect the memory layout with four
- integer values for each chip-select line in use:
-
- <cs-number> 0 <physical address of mapping> <size>
-
-Optional properties:
-
- - fsl,weim-cs-gpr: For "fsl,imx50-weim" and "fsl,imx6q-weim" type of
- devices, it should be the 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 For "fsl,imx50-weim" and "fsl,imx6q-weim" type of
- devices, the presence of this property indicates that
- the weim bus should operate in Burst Clock Mode.
-
- - fsl,continuous-burst-clk Make Burst Clock to output continuous clock.
- Without this option Burst Clock will output clock
- only when necessary. This takes effect only if
- "fsl,burst-clk-enable" is set.
-
-Timing property for child nodes. It is mandatory, not optional.
-
- - fsl,weim-cs-timing: The timing array, contains timing values for the
- child node. We get the CS indexes from the address
- ranges in the child node's "reg" property.
- The number of registers depends on the selected chip:
- For i.MX1, i.MX21 ("fsl,imx1-weim") there are two
- registers: CSxU, CSxL.
- For i.MX25, i.MX27, i.MX31 and i.MX35 ("fsl,imx27-weim")
- there are three registers: CSCRxU, CSCRxL, CSCRxA.
- For i.MX50, i.MX53 ("fsl,imx50-weim"),
- i.MX51 ("fsl,imx51-weim") and i.MX6Q ("fsl,imx6q-weim")
- there are six registers: CSxGCR1, CSxGCR2, CSxRCR1,
- CSxRCR2, CSxWCR1, CSxWCR2.
-
-Example for an imx6q-sabreauto board, the NOR flash connected to the WEIM:
-
- weim: weim@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>;
-
- nor@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>;
- };
- };
-
-Example for an imx6q-based board, a multi-chipselect device connected to WEIM:
-
-In this case, both chip select 0 and 1 will be configured with the same timing
-array values.
-
- weim: weim@21b8000 {
- compatible = "fsl,imx6q-weim";
- reg = <0x021b8000 0x4000>;
- clocks = <&clks 196>;
- #address-cells = <2>;
- #size-cells = <1>;
- ranges = <0 0 0x08000000 0x02000000
- 1 0 0x0a000000 0x02000000
- 2 0 0x0c000000 0x02000000
- 3 0 0x0e000000 0x02000000>;
- fsl,weim-cs-gpr = <&gpr>;
-
- acme@0 {
- compatible = "acme,whatever";
- reg = <0 0 0x100>, <0 0x400000 0x800>,
- <1 0x400000 0x800>;
- fsl,weim-cs-timing = <0x024400b1 0x00001010 0x20081100
- 0x00000000 0xa0000240 0x00000000>;
- };
- };
--- /dev/null
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/memory-controllers/fsl/fsl,imx-weim-peripherals.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX WEIM Bus Peripheral Nodes
+
+maintainers:
+ - Shawn Guo <shawnguo@kernel.org>
+ - Sascha Hauer <s.hauer@pengutronix.de>
+
+description:
+ This binding is meant for the child nodes of the WEIM node. The node
+ represents any device connected to the WEIM bus. It may be a Flash chip,
+ RAM chip or Ethernet controller, etc. These properties are meant for
+ configuring the WEIM settings/timings and will accompany the bindings
+ supported by the respective device.
+
+properties:
+ reg: true
+
+ fsl,weim-cs-timing:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description:
+ Timing values for the child node.
+ minItems: 2
+ maxItems: 6
+
+# the WEIM child will have its own native properties
+additionalProperties: true
--- /dev/null
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$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>;
+ };
+ };
projects / thirdparty / kernel / linux.git / commitdiff
