dt-bindings: memory: synopsys,ddrc-ecc: Detach Zynq DDRC controller support
The Zynq A05 DDRC controller has nothing in common with DW uMCTL2 DDRC: the CSRs layout is absolutely different and it doesn't support IRQs unlike DW uMCTL2 DDR controller of all versions (v1.x, v2.x and v3.x). Thus there is no any reason to have these controllers described in the same bindings. Let's split the DT-schema up. Note since the synopsys,ddrc-ecc.yaml schema describes the Synopsys DW uMCTL2 DDR controller only, we need to accordingly fix the device descriptions. Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20220910194237.10142-15-Sergey.Semin@baikalelectronics.ru
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Serge Semin
Krzysztof Kozlowski
parent
9f8fb8032f
commit
8450813136
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@ -4,7 +4,7 @@
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$id: http://devicetree.org/schemas/memory-controllers/synopsys,ddrc-ecc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Synopsys IntelliDDR Multi Protocol memory controller
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title: Synopsys DesignWare Universal Multi-Protocol Memory Controller
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maintainers:
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- Krzysztof Kozlowski <krzk@kernel.org>
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@ -12,21 +12,22 @@ maintainers:
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- Michal Simek <michal.simek@xilinx.com>
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description: |
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The ZynqMP DDR ECC controller has an optional ECC support in 64-bit and
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32-bit bus width configurations.
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Synopsys DesignWare Enhanced uMCTL2 DDR Memory Controller is capable of
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working with the memory devices supporting up to (LP)DDR4 protocol. It can
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be equipped with SEC/DEC ECC feature if DRAM data bus width is either
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16-bits or 32-bits or 64-bits wide.
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The Zynq DDR ECC controller has an optional ECC support in half-bus width
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(16-bit) configuration.
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These both ECC controllers correct single bit ECC errors and detect double bit
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ECC errors.
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For instance the ZynqMP DDR controller is based on the DW uMCTL2 v2.40a
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controller. It has an optional SEC/DEC ECC support in 64- and 32-bits
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bus width configurations.
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properties:
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compatible:
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enum:
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- snps,ddrc-3.80a
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- xlnx,zynq-ddrc-a05
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- xlnx,zynqmp-ddrc-2.40a
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oneOf:
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- description: Synopsys DW uMCTL2 DDR controller v3.80a
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const: snps,ddrc-3.80a
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- description: Xilinx ZynqMP DDR controller v2.40a
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const: xlnx,zynqmp-ddrc-2.40a
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interrupts:
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maxItems: 1
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@ -37,40 +38,16 @@ properties:
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required:
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- compatible
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- reg
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allOf:
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- if:
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properties:
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compatible:
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contains:
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enum:
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- snps,ddrc-3.80a
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- xlnx,zynqmp-ddrc-2.40a
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then:
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required:
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- interrupts
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else:
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properties:
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interrupts: false
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- interrupts
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additionalProperties: false
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examples:
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- |
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memory-controller@f8006000 {
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compatible = "xlnx,zynq-ddrc-a05";
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reg = <0xf8006000 0x1000>;
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};
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- |
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axi {
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#address-cells = <2>;
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#size-cells = <2>;
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memory-controller@fd070000 {
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compatible = "xlnx,zynqmp-ddrc-2.40a";
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reg = <0x0 0xfd070000 0x0 0x30000>;
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interrupt-parent = <&gic>;
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interrupts = <0 112 4>;
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};
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memory-controller@fd070000 {
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compatible = "xlnx,zynqmp-ddrc-2.40a";
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reg = <0xfd070000 0x30000>;
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interrupt-parent = <&gic>;
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interrupts = <0 112 4>;
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};
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...
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@ -0,0 +1,38 @@
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/memory-controllers/xlnx,zynq-ddrc-a05.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Zynq A05 DDR Memory Controller
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maintainers:
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- Krzysztof Kozlowski <krzk@kernel.org>
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- Manish Narani <manish.narani@xilinx.com>
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- Michal Simek <michal.simek@xilinx.com>
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description:
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The Zynq DDR ECC controller has an optional ECC support in half-bus width
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(16-bit) configuration. It is cappable of correcting single bit ECC errors
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and detecting double bit ECC errors.
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properties:
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compatible:
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const: xlnx,zynq-ddrc-a05
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reg:
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maxItems: 1
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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memory-controller@f8006000 {
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compatible = "xlnx,zynq-ddrc-a05";
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reg = <0xf8006000 0x1000>;
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};
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...
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@ -3087,6 +3087,7 @@ W: http://wiki.xilinx.com
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T: git https://github.com/Xilinx/linux-xlnx.git
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F: Documentation/devicetree/bindings/i2c/cdns,i2c-r1p10.yaml
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F: Documentation/devicetree/bindings/i2c/xlnx,xps-iic-2.00.a.yaml
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F: Documentation/devicetree/bindings/memory-controllers/xlnx,zynq-ddrc-a05.yaml
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F: Documentation/devicetree/bindings/spi/xlnx,zynq-qspi.yaml
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F: arch/arm/mach-zynq/
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F: drivers/clocksource/timer-cadence-ttc.c
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