From b577060ac7ba6085d54f2066d185de4a318c913c Mon Sep 17 00:00:00 2001 From: David Heidelberg Date: Fri, 5 Jul 2024 15:14:54 -0700 Subject: [PATCH] dt-bindings: iommu: Convert msm,iommu-v0 to yaml Convert Qualcomm IOMMU v0 implementation to yaml format. iommus part being ommited for the other bindings, as mdp4 one. Signed-off-by: David Heidelberg Reviewed-by: Rob Herring (Arm) Link: https://lore.kernel.org/r/20240705221520.109540-1-david@ixit.cz Signed-off-by: Will Deacon --- .../bindings/iommu/msm,iommu-v0.txt | 64 --------------- .../bindings/iommu/qcom,apq8064-iommu.yaml | 78 +++++++++++++++++++ 2 files changed, 78 insertions(+), 64 deletions(-) delete mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt create mode 100644 Documentation/devicetree/bindings/iommu/qcom,apq8064-iommu.yaml diff --git a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt b/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt deleted file mode 100644 index 20236385f26e..000000000000 --- a/Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt +++ /dev/null @@ -1,64 +0,0 @@ -* QCOM IOMMU - -The MSM IOMMU is an implementation compatible with the ARM VMSA short -descriptor page tables. It provides address translation for bus masters outside -of the CPU, each connected to the IOMMU through a port called micro-TLB. - -Required Properties: - - - compatible: Must contain "qcom,apq8064-iommu". - - reg: Base address and size of the IOMMU registers. - - interrupts: Specifiers for the MMU fault interrupts. For instances that - support secure mode two interrupts must be specified, for non-secure and - secure mode, in that order. For instances that don't support secure mode a - single interrupt must be specified. - - #iommu-cells: The number of cells needed to specify the stream id. This - is always 1. - - qcom,ncb: The total number of context banks in the IOMMU. - - clocks : List of clocks to be used during SMMU register access. See - Documentation/devicetree/bindings/clock/clock-bindings.txt - for information about the format. For each clock specified - here, there must be a corresponding entry in clock-names - (see below). - - - clock-names : List of clock names corresponding to the clocks specified in - the "clocks" property (above). - Should be "smmu_pclk" for specifying the interface clock - required for iommu's register accesses. - Should be "smmu_clk" for specifying the functional clock - required by iommu for bus accesses. - -Each bus master connected to an IOMMU must reference the IOMMU in its device -node with the following property: - - - iommus: A reference to the IOMMU in multiple cells. The first cell is a - phandle to the IOMMU and the second cell is the stream id. - A single master device can be connected to more than one iommu - and multiple contexts in each of the iommu. So multiple entries - are required to list all the iommus and the stream ids that the - master is connected to. - -Example: mdp iommu and its bus master - - mdp_port0: iommu@7500000 { - compatible = "qcom,apq8064-iommu"; - #iommu-cells = <1>; - clock-names = - "smmu_pclk", - "smmu_clk"; - clocks = - <&mmcc SMMU_AHB_CLK>, - <&mmcc MDP_AXI_CLK>; - reg = <0x07500000 0x100000>; - interrupts = - , - ; - qcom,ncb = <2>; - }; - - mdp: qcom,mdp@5100000 { - compatible = "qcom,mdp"; - ... - iommus = <&mdp_port0 0 - &mdp_port0 2>; - }; diff --git a/Documentation/devicetree/bindings/iommu/qcom,apq8064-iommu.yaml b/Documentation/devicetree/bindings/iommu/qcom,apq8064-iommu.yaml new file mode 100644 index 000000000000..9f83f851e61a --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/qcom,apq8064-iommu.yaml @@ -0,0 +1,78 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: http://devicetree.org/schemas/iommu/qcom,apq8064-iommu.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Qualcomm APQ8064 IOMMU + +maintainers: + - David Heidelberg + +description: + The MSM IOMMU is an implementation compatible with the ARM VMSA short + descriptor page tables. It provides address translation for bus masters + outside of the CPU, each connected to the IOMMU through a port called micro-TLB. + +properties: + compatible: + const: qcom,apq8064-iommu + + clocks: + items: + - description: interface clock for register accesses + - description: functional clock for bus accesses + + clock-names: + items: + - const: smmu_pclk + - const: iommu_clk + + reg: + maxItems: 1 + + interrupts: + description: Specifiers for the MMU fault interrupts. + minItems: 1 + items: + - description: non-secure mode interrupt + - description: secure mode interrupt (for instances which supports it) + + "#iommu-cells": + const: 1 + description: Each IOMMU specifier describes a single Stream ID. + + qcom,ncb: + $ref: /schemas/types.yaml#/definitions/uint32 + description: The total number of context banks in the IOMMU. + minimum: 1 + maximum: 4 + +required: + - reg + - interrupts + - clocks + - clock-names + - qcom,ncb + +additionalProperties: false + +examples: + - | + #include + #include + #include + + iommu@7500000 { + compatible = "qcom,apq8064-iommu"; + reg = <0x07500000 0x100000>; + interrupts = , + ; + clocks = <&clk SMMU_AHB_CLK>, + <&clk MDP_AXI_CLK>; + clock-names = "smmu_pclk", + "iommu_clk"; + #iommu-cells = <1>; + qcom,ncb = <2>; + };