On Wed, Apr 17, 2024 at 11:14:37AM +0200, AngeloGioacchino Del Regno wrote: > Add bindings for the MediaTek External Memory Interface Interconnect, > which providers support system bandwidth requirements through Dynamic > Voltage Frequency Scaling Resource Collector (DVFSRC) hardware. > > This adds bindings for MediaTek MT8183 and MT8195 SoCs. > > Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> > --- > .../interconnect/mediatek,mt8183-emi.yaml | 76 +++++++++++++++++++ > .../interconnect/mediatek,mt8183.h | 23 ++++++ > .../interconnect/mediatek,mt8195.h | 44 +++++++++++ > 3 files changed, 143 insertions(+) > create mode 100644 Documentation/devicetree/bindings/interconnect/mediatek,mt8183-emi.yaml > create mode 100644 include/dt-bindings/interconnect/mediatek,mt8183.h > create mode 100644 include/dt-bindings/interconnect/mediatek,mt8195.h > > diff --git a/Documentation/devicetree/bindings/interconnect/mediatek,mt8183-emi.yaml b/Documentation/devicetree/bindings/interconnect/mediatek,mt8183-emi.yaml > new file mode 100644 > index 000000000000..3ad60fd21f83 > --- /dev/null > +++ b/Documentation/devicetree/bindings/interconnect/mediatek,mt8183-emi.yaml > @@ -0,0 +1,76 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/interconnect/mediatek,mt8183-emi.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: MediaTek External Memory Interface (EMI) Interconnect > + > +maintainers: > + - AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx> > + > +description: | > + EMI interconnect providers support system bandwidth requirements through > + Dynamic Voltage Frequency Scaling Resource Collector (DVFSRC) hardware. > + The provider is able to communicate with the DVFSRC through Secure Monitor > + Call (SMC). > + > + ICC provider ICC Nodes > + ---- ---- > + _________ |CPU | |--- |VPU | > + _____ | |----- ---- | ---- > + | |->| DRAM | ---- | ---- > + |DRAM |->|scheduler|----- |GPU | |--- |DISP| > + | |->| (EMI) | ---- | ---- > + |_____|->|_________|---. ----- | ---- > + /|\ `-|MMSYS|--|--- |VDEC| > + | ----- | ---- > + | | ---- > + | change DRAM freq |--- |VENC| > + -------- | ---- > + SMC --> | DVFSRC | | ---- > + -------- |--- |IMG | > + | ---- > + | ---- > + |--- |CAM | > + ---- > + > +properties: > + compatible: > + enum: > + - mediatek,mt8183-emi > + - mediatek,mt8195-emi > + > + reg: > + maxItems: 1 > + > + '#interconnect-cells': > + const: 1 > + > +required: > + - compatible > + - '#interconnect-cells' > + > +unevaluatedProperties: false > + > +examples: > + - | > + #include <dt-bindings/interconnect/mediatek,mt8195.h> > + > + soc { > + #address-cells = <2>; > + #size-cells = <2>; > + > + system-controller@10012000 { > + compatible = "mediatek,mt8195-dvfsrc"; > + reg = <0 0x10012000 0 0x1000>; > + #address-cells = <1>; > + #size-cells = <0>; > + > + emi_icc: interconnect@1 { > + compatible = "mediatek,mt8195-emi"; > + reg = <1>; > + #interconnect-cells = <1>; There's not really any need for this node. Just put #interconnect-cells in the parent. Rob
