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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /Documentation/devicetree/bindings/arm/tegra/nvidia,tegra234-cbb.yaml | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/tegra/nvidia,tegra234-cbb.yaml')
-rw-r--r-- | Documentation/devicetree/bindings/arm/tegra/nvidia,tegra234-cbb.yaml | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra234-cbb.yaml b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra234-cbb.yaml new file mode 100644 index 0000000000..fcdf031313 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra234-cbb.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/arm/tegra/nvidia,tegra234-cbb.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: NVIDIA Tegra CBB 2.0 + +maintainers: + - Sumit Gupta <sumitg@nvidia.com> + +description: |+ + The Control Backbone (CBB) is comprised of the physical path from an + initiator to a target's register configuration space. CBB 2.0 consists + of multiple sub-blocks connected to each other to create a topology. + The Tegra234 SoC has different fabrics based on CBB 2.0 architecture + which include cluster fabrics BPMP, AON, PSC, SCE, RCE, DCE, FSI and + "CBB central fabric". + + In CBB 2.0, each initiator which can issue transactions connects to a + Root Master Node (MN) before it connects to any other element of the + fabric. Each Root MN contains a Error Monitor (EM) which detects and + logs error. Interrupts from various EM blocks are collated by Error + Notifier (EN) which is per fabric and presents a single interrupt from + fabric to the SoC interrupt controller. + + The driver handles errors from CBB due to illegal register accesses + and prints debug information about failed transaction on receiving + the interrupt from EN. Debug information includes Error Code, Error + Description, MasterID, Fabric, SlaveID, Address, Cache, Protection, + Security Group etc on receiving error notification. + + If the Error Response Disable (ERD) is set/enabled for an initiator, + then SError or Data abort exception error response is masked and an + interrupt is used for reporting errors due to illegal accesses from + that initiator. The value returned on read failures is '0xFFFFFFFF' + for compatibility with PCIE. + +properties: + $nodename: + pattern: "^[a-z]+-fabric@[0-9a-f]+$" + + compatible: + enum: + - nvidia,tegra234-aon-fabric + - nvidia,tegra234-bpmp-fabric + - nvidia,tegra234-cbb-fabric + - nvidia,tegra234-dce-fabric + - nvidia,tegra234-rce-fabric + - nvidia,tegra234-sce-fabric + + reg: + maxItems: 1 + + interrupts: + items: + - description: secure interrupt from error notifier + +additionalProperties: false + +required: + - compatible + - reg + - interrupts + +examples: + - | + #include <dt-bindings/interrupt-controller/arm-gic.h> + + cbb-fabric@1300000 { + compatible = "nvidia,tegra234-cbb-fabric"; + reg = <0x13a00000 0x400000>; + interrupts = <GIC_SPI 231 IRQ_TYPE_LEVEL_HIGH>; + }; |