| Message ID | 20220108184143.69479-1-david@ixit.cz |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v3] dt-bindings: iommu: Convert msm,iommu-v0 to yaml | expand |
Thank you, sent V4. David On 12/01/2022 03:08, Rob Herring wrote: > On Sat, Jan 08, 2022 at 07:41:42PM +0100, David Heidelberg wrote: >> Convert Qualcomm IOMMU v0 implementation to yaml format. >> >> Signed-off-by: David Heidelberg <david@ixit.cz> >> --- >> v2: >> - fix wrong path in binding $id >> - comment qcom,mdp4 node example (we don't want to validate it yet) >> >> v3: >> - I kept the name as -v0, since we have other binding -v1 and it look >> good, I can change thou in v4 if requested. > The preference is to use compatible strings for filenames. There's > little reason not to do that here. > >> - dropped non-existent smmu_clk part (and adjusted example, which was >> using it) >> - dropped iommu description >> - moved iommu-cells description to the property #iommu-cells >> Signed-off-by: David Heidelberg <david@ixit.cz> >> --- >> .../bindings/iommu/msm,iommu-v0.txt | 64 ------------- >> .../bindings/iommu/qcom,iommu-v0.yaml | 91 +++++++++++++++++++ >> 2 files changed, 91 insertions(+), 64 deletions(-) >> delete mode 100644 Documentation/devicetree/bindings/iommu/msm,iommu-v0.txt >> create mode 100644 Documentation/devicetree/bindings/iommu/qcom,iommu-v0.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 = >> - <GIC_SPI 63 0>, >> - <GIC_SPI 64 0>; >> - 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,iommu-v0.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml >> new file mode 100644 >> index 000000000000..a506e8ad8902 >> --- /dev/null >> +++ b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml >> @@ -0,0 +1,91 @@ >> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) >> +%YAML 1.2 >> +--- >> + >> +$id: "http://devicetree.org/schemas/iommu/qcom,iommu-v0.yaml#" >> +$schema: "http://devicetree.org/meta-schemas/core.yaml#" >> + >> +title: Qualcomm IOMMU for APQ8064 >> + >> +maintainers: >> + - Will Deacon <will@kernel.org> >> + >> +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: | >> + 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. >> + >> + qcom,ncb: >> + $ref: /schemas/types.yaml#/definitions/uint32 >> + description: The total number of context banks in the IOMMU. >> + >> +required: >> + - clocks >> + - clock-names >> + - reg >> + - interrupts >> + - qcom,ncb >> + >> +additionalProperties: false >> + >> +examples: >> + - | >> + #include <dt-bindings/clock/qcom,mmcc-msm8960.h> >> + >> + mdp_port0: iommu@7500000 { >> + compatible = "qcom,apq8064-iommu"; >> + #iommu-cells = <1>; >> + clock-names = >> + "smmu_pclk", >> + "iommu_clk"; >> + clocks = >> + <&clk SMMU_AHB_CLK>, >> + <&clk MDP_AXI_CLK>; >> + reg = <0x07500000 0x100000>; >> + interrupts = >> + <0 63 0>, >> + <0 64 0>; >> + qcom,ncb = <2>; >> + }; >> + >> + /* mdp: mdp@5100000 { >> + compatible = "qcom,mdp4"; >> + ... >> + >> + iommus = <&mdp_port0 0 >> + &mdp_port0 2>; >> + };*/ >> -- >> 2.34.1 >> >>
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 = - <GIC_SPI 63 0>, - <GIC_SPI 64 0>; - 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,iommu-v0.yaml b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml new file mode 100644 index 000000000000..a506e8ad8902 --- /dev/null +++ b/Documentation/devicetree/bindings/iommu/qcom,iommu-v0.yaml @@ -0,0 +1,91 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- + +$id: "http://devicetree.org/schemas/iommu/qcom,iommu-v0.yaml#" +$schema: "http://devicetree.org/meta-schemas/core.yaml#" + +title: Qualcomm IOMMU for APQ8064 + +maintainers: + - Will Deacon <will@kernel.org> + +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: | + 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. + + qcom,ncb: + $ref: /schemas/types.yaml#/definitions/uint32 + description: The total number of context banks in the IOMMU. + +required: + - clocks + - clock-names + - reg + - interrupts + - qcom,ncb + +additionalProperties: false + +examples: + - | + #include <dt-bindings/clock/qcom,mmcc-msm8960.h> + + mdp_port0: iommu@7500000 { + compatible = "qcom,apq8064-iommu"; + #iommu-cells = <1>; + clock-names = + "smmu_pclk", + "iommu_clk"; + clocks = + <&clk SMMU_AHB_CLK>, + <&clk MDP_AXI_CLK>; + reg = <0x07500000 0x100000>; + interrupts = + <0 63 0>, + <0 64 0>; + qcom,ncb = <2>; + }; + + /* mdp: mdp@5100000 { + compatible = "qcom,mdp4"; + ... + + iommus = <&mdp_port0 0 + &mdp_port0 2>; + };*/