xref: /linux/Documentation/devicetree/bindings/memory-controllers/st,stm32mp25-omm.yaml (revision 297d9111e9fcf47dd1dcc6f79bba915f35378d01)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/memory-controllers/st,stm32mp25-omm.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: STM32 Octo Memory Manager (OMM)

maintainers:
  - Patrice Chotard <patrice.chotard@foss.st.com>

description: |
  The STM32 Octo Memory Manager is a low-level interface that enables an
  efficient OCTOSPI pin assignment with a full I/O matrix (before alternate
  function map) and multiplex of single/dual/quad/octal SPI interfaces over
  the same bus. It Supports up to:
    - Two single/dual/quad/octal SPI interfaces
    - Two ports for pin assignment

properties:
  compatible:
    const: st,stm32mp25-omm

  "#address-cells":
    const: 2

  "#size-cells":
    const: 1

  ranges:
    description: |
      Reflects the memory layout per OSPI instance.
      Format:
      <chip-select> 0 <registers base address> <size>
    minItems: 2
    maxItems: 2

  reg:
    items:
      - description: OMM registers
      - description: OMM memory map area

  reg-names:
    items:
      - const: regs
      - const: memory_map

  memory-region:
    description:
      Memory region shared between the 2 OCTOSPI instance.
      One or two phandle to a node describing a memory mapped region
      depending of child number.
    minItems: 1
    maxItems: 2

  memory-region-names:
    description:
      Identify to which OSPI instance the memory region belongs to.
    items:
      enum: [ospi1, ospi2]
    minItems: 1
    maxItems: 2

  clocks:
    maxItems: 3

  clock-names:
    items:
      - const: omm
      - const: ospi1
      - const: ospi2

  resets:
    maxItems: 3

  reset-names:
    items:
      - const: omm
      - const: ospi1
      - const: ospi2

  access-controllers:
    maxItems: 1

  power-domains:
    maxItems: 1

  st,syscfg-amcr:
    $ref: /schemas/types.yaml#/definitions/phandle-array
    description: |
      The Address Mapping Control Register (AMCR) is used to split the 256MB
      memory map area shared between the 2 OSPI instance. The Octo Memory
      Manager sets the AMCR depending of the memory-region configuration.
      The memory split bitmask description is:
        - 000: OCTOSPI1 (256 Mbytes), OCTOSPI2 unmapped
        - 001: OCTOSPI1 (192 Mbytes), OCTOSPI2 (64 Mbytes)
        - 010: OCTOSPI1 (128 Mbytes), OCTOSPI2 (128 Mbytes)
        - 011: OCTOSPI1 (64 Mbytes), OCTOSPI2 (192 Mbytes)
        - 1xx: OCTOSPI1 unmapped, OCTOSPI2 (256 Mbytes)
    items:
      - items:
          - description: phandle to syscfg
          - description: register offset within syscfg
          - description: register bitmask for memory split

  st,omm-req2ack-ns:
    description:
      In multiplexed mode (MUXEN = 1), this field defines the time in
      nanoseconds between two transactions.
    default: 0

  st,omm-cssel-ovr:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Configure the chip select selector override for the 2 OCTOSPIs.
      - 0: OCTOSPI1 chip select send to NCS1 OCTOSPI2 chip select send to NCS1
      - 1: OCTOSPI1 chip select send to NCS2 OCTOSPI2 chip select send to NCS1
      - 2: OCTOSPI1 chip select send to NCS1 OCTOSPI2 chip select send to NCS2
      - 3: OCTOSPI1 chip select send to NCS2 OCTOSPI2 chip select send to NCS2
    minimum: 0
    maximum: 3
    default: 0

  st,omm-mux:
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Configure the muxing between the 2 OCTOSPIs busses and the 2 output ports.
      - 0: direct mode
      - 1: mux OCTOSPI1 and OCTOSPI2 to port 1
      - 2: swapped mode
      - 3: mux OCTOSPI1 and OCTOSPI2 to port 2
    minimum: 0
    maximum: 3
    default: 0

patternProperties:
  ^spi@[0-9]:
    type: object
    $ref: /schemas/spi/st,stm32mp25-ospi.yaml#
    description: Required spi child node

required:
  - compatible
  - reg
  - "#address-cells"
  - "#size-cells"
  - clocks
  - clock-names
  - resets
  - reset-names
  - st,syscfg-amcr
  - ranges

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/st,stm32mp25-rcc.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    #include <dt-bindings/reset/st,stm32mp25-rcc.h>
    ommanager@40500000 {
      compatible = "st,stm32mp25-omm";
      reg = <0x40500000 0x400>, <0x60000000 0x10000000>;
      reg-names = "regs", "memory_map";
      ranges = <0 0 0x40430000 0x400>,
               <1 0 0x40440000 0x400>;
      memory-region = <&mm_ospi1>, <&mm_ospi2>;
      memory-region-names = "ospi1", "ospi2";
      pinctrl-0 = <&ospi_port1_clk_pins_a
                   &ospi_port1_io03_pins_a
                   &ospi_port1_cs0_pins_a>;
      pinctrl-1 = <&ospi_port1_clk_sleep_pins_a
                   &ospi_port1_io03_sleep_pins_a
                   &ospi_port1_cs0_sleep_pins_a>;
      pinctrl-names = "default", "sleep";
      clocks = <&rcc CK_BUS_OSPIIOM>,
               <&scmi_clk CK_SCMI_OSPI1>,
               <&scmi_clk CK_SCMI_OSPI2>;
      clock-names = "omm", "ospi1", "ospi2";
      resets = <&rcc OSPIIOM_R>,
               <&scmi_reset RST_SCMI_OSPI1>,
               <&scmi_reset RST_SCMI_OSPI2>;
      reset-names = "omm", "ospi1", "ospi2";
      access-controllers = <&rifsc 111>;
      power-domains = <&CLUSTER_PD>;
      #address-cells = <2>;
      #size-cells = <1>;
      st,syscfg-amcr = <&syscfg 0x2c00 0x7>;
      st,omm-req2ack-ns = <0>;
      st,omm-mux = <0>;
      st,omm-cssel-ovr = <0>;

      spi@0 {
        compatible = "st,stm32mp25-ospi";
        reg = <0 0 0x400>;
        memory-region = <&mm_ospi1>;
        interrupts = <GIC_SPI 163 IRQ_TYPE_LEVEL_HIGH>;
        dmas = <&hpdma 2 0x62 0x00003121 0x0>,
               <&hpdma 2 0x42 0x00003112 0x0>;
        dma-names = "tx", "rx";
        clocks = <&scmi_clk CK_SCMI_OSPI1>;
        resets = <&scmi_reset RST_SCMI_OSPI1>, <&scmi_reset RST_SCMI_OSPI1DLL>;
        access-controllers = <&rifsc 74>;
        power-domains = <&CLUSTER_PD>;
        #address-cells = <1>;
        #size-cells = <0>;
        st,syscfg-dlyb = <&syscfg 0x1000>;
      };

      spi@1 {
        compatible = "st,stm32mp25-ospi";
        reg = <1 0 0x400>;
        memory-region = <&mm_ospi1>;
        interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
        dmas = <&hpdma 3 0x62 0x00003121 0x0>,
               <&hpdma 3 0x42 0x00003112 0x0>;
        dma-names = "tx", "rx";
        clocks = <&scmi_clk CK_KER_OSPI2>;
        resets = <&scmi_reset RST_SCMI_OSPI2>, <&scmi_reset RST_SCMI_OSPI1DLL>;
        access-controllers = <&rifsc 75>;
        power-domains = <&CLUSTER_PD>;
        #address-cells = <1>;
        #size-cells = <0>;
        st,syscfg-dlyb = <&syscfg 0x1000>;
      };
    };