Messages in this thread Patch in this message |  | | From | mtk20898 <> | | Subject | [RESEND,v2 1/2] dt-bindings: memory-controllers: mtk-smi: Add support for mt8189 | | Date | Mon, 27 Apr 2026 15:04:28 +0800 |
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From: Zhengnan Chen <zhengnan.chen@mediatek.com>
Add binding description for mt8189.
The clocks number of mt8189 smi-sub common has a bit difference. Its clock count is 2, while mt8195 has 3. Therefore, the minimum number of clocks is changed to 2, with the third one being optional.
About what smi-sub-common is, please check the below diagram, we add it in mediatek,smi-common.yaml file.
Signed-off-by: Zhengnan Chen <zhengnan.chen@mediatek.com> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> --- .../mediatek,smi-common.yaml | 25 +++++++++++++++++-- .../memory-controllers/mediatek,smi-larb.yaml | 3 +++ 2 files changed, 26 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml index 0762e0ff66ef..454d11a83973 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml @@ -25,6 +25,21 @@ description: | SMI generation 1 to transform the smi clock into emi clock domain, but that is not needed for SMI generation 2. + The smi-common connects with smi-larb and IOMMU. The maximum inputs number of + a smi-common is 8. In SMI generation 2, the engines number may be over 8. + In this case, we use a smi-sub-common to merge some larbs. + The block diagram something is like: + + IOMMU + | | + smi-common + --------------------------- + | | ... + larb0 sub-common ... <-max number is 8 + ---------------- + | | ... + larb1 larbX ... <-max number is 8 + properties: compatible: oneOf: @@ -40,6 +55,8 @@ properties: - mediatek,mt8186-smi-common - mediatek,mt8188-smi-common-vdo - mediatek,mt8188-smi-common-vpp + - mediatek,mt8189-smi-common + - mediatek,mt8189-smi-sub-common - mediatek,mt8192-smi-common - mediatek,mt8195-smi-common-vdo - mediatek,mt8195-smi-common-vpp @@ -108,19 +125,23 @@ allOf: compatible: contains: enum: + - mediatek,mt8189-smi-sub-common - mediatek,mt8195-smi-sub-common then: required: - mediatek,smi properties: clocks: - minItems: 3 + minItems: 2 maxItems: 3 clock-names: + minItems: 2 + maxItems: 3 items: - const: apb - const: smi - - const: gals0 + additionalItems: + const: gals0 else: properties: mediatek,smi: false diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml index 2e7fac4b5094..9a5dafd7c07e 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml @@ -27,6 +27,7 @@ properties: - mediatek,mt8183-smi-larb - mediatek,mt8186-smi-larb - mediatek,mt8188-smi-larb + - mediatek,mt8189-smi-larb - mediatek,mt8192-smi-larb - mediatek,mt8195-smi-larb @@ -85,6 +86,7 @@ allOf: - mediatek,mt8183-smi-larb - mediatek,mt8186-smi-larb - mediatek,mt8188-smi-larb + - mediatek,mt8189-smi-larb - mediatek,mt8195-smi-larb then: @@ -119,6 +121,7 @@ allOf: - mediatek,mt6779-smi-larb - mediatek,mt8186-smi-larb - mediatek,mt8188-smi-larb + - mediatek,mt8189-smi-larb - mediatek,mt8192-smi-larb - mediatek,mt8195-smi-larb -- 2.46.0
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