On Wed, Jun 01, 2022 at 09:21:07AM -0700, Tanmay Shah wrote: > Xilinx ZynqMP platform has dual-core ARM Cortex R5 Realtime Processing > Unit(RPU) subsystem. This patch adds dt-bindings for RPU subsystem > (cluster). > > Signed-off-by: Tanmay Shah <tanmay.shah@xxxxxxxxxx> > --- > > Changes in v7: > - Add minItems in sram property > > Changes in v6: > - Add maxItems to sram and memory-region property > > Changes in v5: > - Add constraints of the possible values of xlnx,cluster-mode property > - fix description of power-domains property for r5 core > - Remove reg, address-cells and size-cells properties as it is not required > - Fix description of mboxes property > - Add description of each memory-region and remove old .txt binding link > reference in the description > > Changes in v4: > - Add memory-region, mboxes and mbox-names properties in example > > Changes in v3: > - None > > .../bindings/remoteproc/xlnx,r5f-rproc.yaml | 130 ++++++++++++++++++ > include/dt-bindings/power/xlnx-zynqmp-power.h | 6 + > 2 files changed, 136 insertions(+) > create mode 100644 Documentation/devicetree/bindings/remoteproc/xlnx,r5f-rproc.yaml > > diff --git a/Documentation/devicetree/bindings/remoteproc/xlnx,r5f-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/xlnx,r5f-rproc.yaml > new file mode 100644 > index 000000000000..89ce9ec10163 > --- /dev/null > +++ b/Documentation/devicetree/bindings/remoteproc/xlnx,r5f-rproc.yaml > @@ -0,0 +1,130 @@ > +# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/remoteproc/xlnx,r5f-rproc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Xilinx R5F processor subsystem > + > +maintainers: > + - Ben Levinsky <ben.levinsky@xxxxxxxxxx> > + - Tanmay Shah <tanmay.shah@xxxxxxxxxx> > + > +description: | > + The Xilinx platforms include a pair of Cortex-R5F processors (RPU) for > + real-time processing based on the Cortex-R5F processor core from ARM. > + The Cortex-R5F processor implements the Arm v7-R architecture and includes a > + floating-point unit that implements the Arm VFPv3 instruction set. > + > +properties: > + compatible: > + const: xlnx,zynqmp-r5fss > + > + xlnx,cluster-mode: > + $ref: /schemas/types.yaml#/definitions/uint32 > + enum: [0, 1, 2] > + description: | > + The RPU MPCore can operate in split mode(Dual-processor performance), Safety > + lock-step mode(Both RPU cores execute the same code in lock-step, > + clock-for-clock) or Single CPU mode (RPU core 0 can be held in reset while > + core 1 runs normally). The processor does not support dynamic configuration. > + Switching between modes is only permitted immediately after a processor reset. > + If set to 1 then lockstep mode and if 0 then split mode. > + If set to 2 then single CPU mode. When not defined, default will be lockstep mode. > + > +patternProperties: > + "^r5f-[a-f0-9]+$": > + type: object > + description: | > + The RPU is located in the Low Power Domain of the Processor Subsystem. > + Each processor includes separate L1 instruction and data caches and > + tightly coupled memories (TCM). System memory is cacheable, but the TCM > + memory space is non-cacheable. > + > + Each RPU contains one 64KB memory and two 32KB memories that > + are accessed via the TCM A and B port interfaces, for a total of 128KB > + per processor. In lock-step mode, the processor has access to 256KB of > + TCM memory. > + > + properties: > + compatible: > + const: xlnx,zynqmp-r5f > + > + power-domains: > + description: RPU core PM domain specifier > + maxItems: 1 > + > + mboxes: > + minItems: 1 > + items: > + - description: mailbox channel to send data to RPU > + - description: mailbox channel to receive data from RPU > + > + mbox-names: > + minItems: 1 > + items: > + - const: tx > + - const: rx > + > + sram: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + minItems: 1 > + maxItems: 8 See my comments on v6. > + description: | > + phandles to one or more reserved on-chip SRAM regions. Other than TCM, > + the RPU can execute instructions and access data from, the OCM memory, > + the main DDR memory, and other system memories. > + > + The regions should be defined as child nodes of the respective SRAM > + node, and should be defined as per the generic bindings in, > + Documentation/devicetree/bindings/sram/sram.yaml > + > + memory-region: > + description: | > + List of phandles to the reserved memory regions associated with the > + remoteproc device. This is variable and describes the memories shared with > + the remote processor (e.g. remoteproc firmware and carveouts, rpmsg > + vrings, ...). This reserved memory region will be allocated on DDR memory. > + minItems: 1 > + maxItems: 8 > + items: > + - description: region used for RPU firmware image section > + - description: vdev buffer > + - description: vring0 > + - description: vring1 > + additionalItems: true > + > + required: > + - compatible > + - power-domains > + > + unevaluatedProperties: false > + > +required: > + - compatible > + > +additionalProperties: false > + > +examples: > + - | > + r5fss: r5fss { > + compatible = "xlnx,zynqmp-r5fss"; > + xlnx,cluster-mode = <1>; > + > + r5f-0 { > + compatible = "xlnx,zynqmp-r5f"; > + power-domains = <&zynqmp_firmware 0x7>; > + memory-region = <&rproc_0_fw_image>, <&rpu0vdev0buffer>, <&rpu0vdev0vring0>, <&rpu0vdev0vring1>; > + mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>; > + mbox-names = "tx", "rx"; > + }; > + > + r5f-1 { > + compatible = "xlnx,zynqmp-r5f"; > + power-domains = <&zynqmp_firmware 0x8>; > + memory-region = <&rproc_1_fw_image>, <&rpu1vdev0buffer>, <&rpu1vdev0vring0>, <&rpu1vdev0vring1>; > + mboxes = <&ipi_mailbox_rpu1 0>, <&ipi_mailbox_rpu1 1>; > + mbox-names = "tx", "rx"; > + }; > + }; > +... > diff --git a/include/dt-bindings/power/xlnx-zynqmp-power.h b/include/dt-bindings/power/xlnx-zynqmp-power.h > index 0d9a412fd5e0..618024cbb20d 100644 > --- a/include/dt-bindings/power/xlnx-zynqmp-power.h > +++ b/include/dt-bindings/power/xlnx-zynqmp-power.h > @@ -6,6 +6,12 @@ > #ifndef _DT_BINDINGS_ZYNQMP_POWER_H > #define _DT_BINDINGS_ZYNQMP_POWER_H > > +#define PD_RPU_0 7 > +#define PD_RPU_1 8 > +#define PD_R5_0_ATCM 15 > +#define PD_R5_0_BTCM 16 > +#define PD_R5_1_ATCM 17 > +#define PD_R5_1_BTCM 18 > #define PD_USB_0 22 > #define PD_USB_1 23 > #define PD_TTC_0 24 > -- > 2.25.1 > >
