| # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra186-mc.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: NVIDIA Tegra186 (and later) SoC Memory Controller |
| |
| maintainers: |
| - Jon Hunter <jonathanh@nvidia.com> |
| - Thierry Reding <thierry.reding@gmail.com> |
| |
| description: | |
| The NVIDIA Tegra186 SoC features a 128 bit memory controller that is split |
| into four 32 bit channels to support LPDDR4 with x16 subpartitions. The MC |
| handles memory requests for 40-bit virtual addresses from internal clients |
| and arbitrates among them to allocate memory bandwidth. |
| |
| Up to 15 GiB of physical memory can be supported. Security features such as |
| encryption of traffic to and from DRAM via general security apertures are |
| available for video and other secure applications, as well as DRAM ECC for |
| automotive safety applications (single bit error correction and double bit |
| error detection). |
| |
| properties: |
| $nodename: |
| pattern: "^memory-controller@[0-9a-f]+$" |
| |
| compatible: |
| items: |
| - enum: |
| - nvidia,tegra186-mc |
| - nvidia,tegra194-mc |
| - nvidia,tegra234-mc |
| |
| reg: |
| minItems: 6 |
| maxItems: 18 |
| |
| reg-names: |
| minItems: 6 |
| maxItems: 18 |
| |
| interrupts: |
| items: |
| - description: MC general interrupt |
| |
| "#address-cells": |
| const: 2 |
| |
| "#size-cells": |
| const: 2 |
| |
| ranges: true |
| |
| dma-ranges: true |
| |
| "#interconnect-cells": |
| const: 1 |
| |
| patternProperties: |
| "^external-memory-controller@[0-9a-f]+$": |
| description: |
| The bulk of the work involved in controlling the external memory |
| controller on NVIDIA Tegra186 and later is performed on the BPMP. This |
| coprocessor exposes the EMC clock that is used to set the frequency at |
| which the external memory is clocked and a remote procedure call that |
| can be used to obtain the set of available frequencies. |
| type: object |
| properties: |
| compatible: |
| items: |
| - enum: |
| - nvidia,tegra186-emc |
| - nvidia,tegra194-emc |
| - nvidia,tegra234-emc |
| |
| reg: |
| minItems: 1 |
| maxItems: 2 |
| |
| interrupts: |
| items: |
| - description: EMC general interrupt |
| |
| clocks: |
| items: |
| - description: external memory clock |
| |
| clock-names: |
| items: |
| - const: emc |
| |
| "#interconnect-cells": |
| const: 0 |
| |
| nvidia,bpmp: |
| $ref: /schemas/types.yaml#/definitions/phandle |
| description: |
| phandle of the node representing the BPMP |
| |
| allOf: |
| - if: |
| properties: |
| compatible: |
| const: nvidia,tegra186-emc |
| then: |
| properties: |
| reg: |
| maxItems: 1 |
| |
| - if: |
| properties: |
| compatible: |
| const: nvidia,tegra194-emc |
| then: |
| properties: |
| reg: |
| minItems: 2 |
| |
| - if: |
| properties: |
| compatible: |
| const: nvidia,tegra234-emc |
| then: |
| properties: |
| reg: |
| minItems: 2 |
| |
| additionalProperties: false |
| |
| required: |
| - compatible |
| - reg |
| - interrupts |
| - clocks |
| - clock-names |
| - "#interconnect-cells" |
| - nvidia,bpmp |
| |
| allOf: |
| - if: |
| properties: |
| compatible: |
| const: nvidia,tegra186-mc |
| then: |
| properties: |
| reg: |
| maxItems: 6 |
| description: 5 memory controller channels and 1 for stream-id registers |
| |
| reg-names: |
| items: |
| - const: sid |
| - const: broadcast |
| - const: ch0 |
| - const: ch1 |
| - const: ch2 |
| - const: ch3 |
| |
| - if: |
| properties: |
| compatible: |
| const: nvidia,tegra194-mc |
| then: |
| properties: |
| reg: |
| minItems: 18 |
| description: 17 memory controller channels and 1 for stream-id registers |
| |
| reg-names: |
| items: |
| - const: sid |
| - const: broadcast |
| - const: ch0 |
| - const: ch1 |
| - const: ch2 |
| - const: ch3 |
| - const: ch4 |
| - const: ch5 |
| - const: ch6 |
| - const: ch7 |
| - const: ch8 |
| - const: ch9 |
| - const: ch10 |
| - const: ch11 |
| - const: ch12 |
| - const: ch13 |
| - const: ch14 |
| - const: ch15 |
| |
| - if: |
| properties: |
| compatible: |
| const: nvidia,tegra234-mc |
| then: |
| properties: |
| reg: |
| minItems: 18 |
| description: 17 memory controller channels and 1 for stream-id registers |
| |
| reg-names: |
| items: |
| - const: sid |
| - const: broadcast |
| - const: ch0 |
| - const: ch1 |
| - const: ch2 |
| - const: ch3 |
| - const: ch4 |
| - const: ch5 |
| - const: ch6 |
| - const: ch7 |
| - const: ch8 |
| - const: ch9 |
| - const: ch10 |
| - const: ch11 |
| - const: ch12 |
| - const: ch13 |
| - const: ch14 |
| - const: ch15 |
| |
| additionalProperties: false |
| |
| required: |
| - compatible |
| - reg |
| - reg-names |
| - interrupts |
| - "#address-cells" |
| - "#size-cells" |
| |
| examples: |
| - | |
| #include <dt-bindings/clock/tegra186-clock.h> |
| #include <dt-bindings/interrupt-controller/arm-gic.h> |
| |
| bus { |
| #address-cells = <2>; |
| #size-cells = <2>; |
| |
| memory-controller@2c00000 { |
| compatible = "nvidia,tegra186-mc"; |
| reg = <0x0 0x02c00000 0x0 0x10000>, /* MC-SID */ |
| <0x0 0x02c10000 0x0 0x10000>, /* Broadcast channel */ |
| <0x0 0x02c20000 0x0 0x10000>, /* MC0 */ |
| <0x0 0x02c30000 0x0 0x10000>, /* MC1 */ |
| <0x0 0x02c40000 0x0 0x10000>, /* MC2 */ |
| <0x0 0x02c50000 0x0 0x10000>; /* MC3 */ |
| reg-names = "sid", "broadcast", "ch0", "ch1", "ch2", "ch3"; |
| interrupts = <GIC_SPI 223 IRQ_TYPE_LEVEL_HIGH>; |
| |
| #address-cells = <2>; |
| #size-cells = <2>; |
| |
| ranges = <0x0 0x02c00000 0x0 0x02c00000 0x0 0xb0000>; |
| |
| /* |
| * Memory clients have access to all 40 bits that the memory |
| * controller can address. |
| */ |
| dma-ranges = <0x0 0x0 0x0 0x0 0x100 0x0>; |
| |
| external-memory-controller@2c60000 { |
| compatible = "nvidia,tegra186-emc"; |
| reg = <0x0 0x02c60000 0x0 0x50000>; |
| interrupts = <GIC_SPI 224 IRQ_TYPE_LEVEL_HIGH>; |
| clocks = <&bpmp TEGRA186_CLK_EMC>; |
| clock-names = "emc"; |
| |
| #interconnect-cells = <0>; |
| |
| nvidia,bpmp = <&bpmp>; |
| }; |
| }; |
| }; |
