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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml | |
parent | Initial commit. (diff) | |
download | linux-430c2fc249ea5c0536abd21c23382884005c9093.tar.xz linux-430c2fc249ea5c0536abd21c23382884005c9093.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml new file mode 100644 index 000000000..611bda38d --- /dev/null +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra186-mc.yaml @@ -0,0 +1,135 @@ +# 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 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + "#address-cells": + const: 2 + + "#size-cells": + const: 2 + + ranges: true + + dma-ranges: true + +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 + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + clocks: + items: + - description: external memory clock + + clock-names: + items: + - const: emc + + nvidia,bpmp: + $ref: /schemas/types.yaml#/definitions/phandle + description: + phandle of the node representing the BPMP + +required: + - compatible + - reg + - interrupts + - "#address-cells" + - "#size-cells" + +additionalProperties: false + +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 0xb0000>; + 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"; + + nvidia,bpmp = <&bpmp>; + }; + }; + }; + + bpmp: bpmp { + compatible = "nvidia,tegra186-bpmp"; + #clock-cells = <1>; + }; |