[PATCH v3 02/16] dt-bindings: bus: imx-weim: convert to YAML
Krzysztof Kozlowski
krzysztof.kozlowski at linaro.org
Sat Feb 17 00:39:52 PST 2024
On 16/02/2024 23:34, Sebastian Reichel wrote:
> Convert the i.MX Wireless External Interface Module binding to YAML.
>
> Signed-off-by: Sebastian Reichel <sre at kernel.org>
> ---
> .../devicetree/bindings/bus/imx-weim.txt | 117 ----------
> .../fsl/fsl,imx-weim-peripherals.yaml | 31 +++
> .../memory-controllers/fsl/fsl,imx-weim.yaml | 203 ++++++++++++++++++
> .../mc-peripheral-props.yaml | 1 +
> .../fieldbus/arcx,anybus-controller.txt | 2 +-
> 5 files changed, 236 insertions(+), 118 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/bus/imx-weim.txt
> create mode 100644 Documentation/devicetree/bindings/memory-controllers/fsl/fsl,imx-weim-peripherals.yaml
> create mode 100644 Documentation/devicetree/bindings/memory-controllers/fsl/fsl,imx-weim.yaml
>
> diff --git a/Documentation/devicetree/bindings/bus/imx-weim.txt b/Documentation/devicetree/bindings/bus/imx-weim.txt
> deleted file mode 100644
> index e7f502070d77..000000000000
> --- a/Documentation/devicetree/bindings/bus/imx-weim.txt
> +++ /dev/null
> @@ -1,117 +0,0 @@
> -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 at 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 at 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 at 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 at 0 {
> - compatible = "acme,whatever";
> - reg = <0 0 0x100>, <0 0x400000 0x800>,
> - <1 0x400000 0x800>;
> - fsl,weim-cs-timing = <0x024400b1 0x00001010 0x20081100
> - 0x00000000 0xa0000240 0x00000000>;
> - };
> - };
> diff --git a/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,imx-weim-peripherals.yaml b/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,imx-weim-peripherals.yaml
> new file mode 100644
> index 000000000000..82fc5f4a1ed6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/memory-controllers/fsl/fsl,imx-weim-peripherals.yaml
> @@ -0,0 +1,31 @@
> +# 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 at kernel.org>
> + - Sascha Hauer <s.hauer at 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
Your pattern in weim schema suggests you have here minItems: 2.
maxItems: can be 2 or 255.
> +
> + fsl,weim-cs-timing:
> + $ref: /schemas/types.yaml#/definitions/uint32-array
> + description:
> + Timing values for the child node.
> + minItems: 2
> + maxItems: 6
> +
...
> +patternProperties:
> + "^.*@[0-7],[0-9a-f]+$":
> + 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'
Plaese keep consistent quotes, either ' or "
> + - 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:
> + properties:
> + fsl,burst-clk-enable: false
This does not work, or at least should not IMO.
What you want is
not:
required:
https://elixir.bootlin.com/linux/v6.4-rc7/source/Documentation/devicetree/bindings/net/qcom,ipa.yaml#L174
> + then:
> + properties:
> + fsl,continuous-burst-clk: false
> +
Best regards,
Krzysztof
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