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The MSMC acts as a bus container for multiple DDR subsystem instances and carries interleave configuration written by the bootloader. Signed-off-by: MANNURU VENKATESWARLU --- .../memory-controllers/ti/ti,j721s2-msmc.yaml | 124 ++++++++++++++++++ 1 file changed, 124 insertions(+) create mode 100644 Documentation/devicetree/bindings/memory-controllers/ti/ti,j721s2-msmc.yaml diff --git a/Documentation/devicetree/bindings/memory-controllers/ti/ti,j721s2-msmc.yaml b/Documentation/devicetree/bindings/memory-controllers/ti/ti,j721s2-msmc.yaml new file mode 100644 index 0000000000000..5ccdc546a121f --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/ti/ti,j721s2-msmc.yaml @@ -0,0 +1,124 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/memory-controllers/ti/ti,j721s2-msmc.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: TI K3 Multi-Subsystem Memory Controller (MSMC) + +maintainers: + - Neha Malcom Francis + +description: + The K3 MSMC node is present on J721S2, J784S4, and J742S2 SoCs. It acts + as a bus container for multiple DDR subsystem instances and carries + metadata describing how DDR address space is interleaved across those + instances. All properties are configured by the bootloader at boot time + prior to OS handoff; the OS treats them as read-only. + +properties: + compatible: + items: + - const: ti,j721s2-msmc + - const: simple-bus + + '#address-cells': + const: 2 + + '#size-cells': + const: 2 + + ranges: true + + bootph-pre-ram: true + + intrlv-gran: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + DDR address interleaving granularity. + + intrlv-size: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + DDR address interleaving region size. + + ecc-enable: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + ECC enable bitmask across DDR instances. + + emif-config: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + EMIF hybrid DDR configuration select. + + emif-active: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Bitmask of active EMIF instances. + +patternProperties: + "^memorycontroller@[0-9a-f]+$": + type: object + description: DDR subsystem child node, see ti,j7-ddrss.yaml. + +required: + - compatible + - '#address-cells' + - '#size-cells' + - ranges + +additionalProperties: false + +examples: + - | + #include + #include + + msmc0: msmc { + compatible = "ti,j721s2-msmc", "simple-bus"; + #address-cells = <2>; + #size-cells = <2>; + ranges; + intrlv-gran = <0>; + intrlv-size = <0>; + ecc-enable = <0>; + emif-config = <0>; + emif-active = <0>; + bootph-pre-ram; + + memorycontroller0: memorycontroller@2980000 { + compatible = "ti,j721s2-ddrss"; + reg = <0x0 0x02990000 0x0 0x4000>, + <0x0 0x0114000 0x0 0x100>, + <0x0 0x02980000 0x0 0x200>; + reg-names = "cfg", "ctrl_mmr_lp4", "ss_cfg"; + power-domains = <&k3_pds 138 TI_SCI_PD_SHARED>, + <&k3_pds 96 TI_SCI_PD_SHARED>; + interrupts = ; + #address-cells = <2>; + #size-cells = <2>; + ranges = <0x00 0x0000 0x00 0x02990000 0x00 0x4000>; + ti,ddr-freq0 = <0>; + ti,ddr-freq1 = <0>; + ti,ddr-freq2 = <0>; + ti,ddr-fhs-cnt = <0>; + clocks = <&k3_clks 138 0>, <&k3_clks 43 2>; + instance = <0>; + bootph-pre-ram; + + ddr0: ddr@0 { + compatible = "cdns,k3-ddr"; + reg = <0x00 0x0000 0x00 0x72c>, + <0x00 0x2000 0x00 0x4b0>, + <0x00 0x4000 0x00 0x163c>; + reg-names = "ctl_cfg", "ctl_cfg_pi", "ctl_cfg_phy"; + bootph-pre-ram; + }; + + ddr_pmu0: ddr-pmu@100 { + compatible = "ti,k3-ddr-pmu"; + reg = <0x00 0x100 0x00 0x14>; + }; + }; + }; -- 2.34.1