Documentation/devicetree/bindings/memory-controllers/rockchip,rk3399-dmc.yaml

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# %YAML 1.2
---
$id: http://devicetree.org/schemas/memory-controllers/rockchip,rk3399-dmc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Rockchip rk3399 DMC (Dynamic Memory Controller) device

maintainers:
  - Brian Norris <briannorris@chromium.org>

properties:
  compatible:
    enum:
      - rockchip,rk3399-dmc

  devfreq-events:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      Node to get DDR loading. Refer to
      Documentation/devicetree/bindings/devfreq/event/rockchip-dfi.txt.

  clocks:
    maxItems: 1

  clock-names:
    items:
      - const: dmc_clk

  operating-points-v2: true

  center-supply:
    description:
      DMC regulator supply.

  rockchip,pmu:
    $ref: /schemas/types.yaml#/definitions/phandle
    description:
      Phandle to the syscon managing the "PMU general register files".

  interrupts:
    maxItems: 1
    description:
      The CPU interrupt number. It should be a DCF interrupt. When DDR DVFS
      finishes, a DCF interrupt is triggered.

  rockchip,ddr3_speed_bin:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      For values, reference include/dt-bindings/clock/rk3399-ddr.h. Selects the
      DDR3 cl-trp-trcd type. It must be set according to "Speed Bin" in DDR3
      datasheet; DO NOT use a smaller "Speed Bin" than specified for the DDR3
      being used.

  rockchip,pd_idle:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Configure the PD_IDLE value. Defines the power-down idle period in which
      memories are placed into power-down mode if bus is idle for PD_IDLE DFI
      clock cycles.
      See also rockchip,pd-idle-ns.

  rockchip,sr_idle:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Configure the SR_IDLE value. Defines the self-refresh idle period in
      which memories are placed into self-refresh mode if bus is idle for
      SR_IDLE * 1024 DFI clock cycles (DFI clocks freq is half of DRAM clock).
      See also rockchip,sr-idle-ns.
    default: 0

  rockchip,sr_mc_gate_idle:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Defines the memory self-refresh and controller clock gating idle period.
      Memories are placed into self-refresh mode and memory controller clock
      arg gating started if bus is idle for sr_mc_gate_idle*1024 DFI clock
      cycles.
      See also rockchip,sr-mc-gate-idle-ns.

  rockchip,srpd_lite_idle:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Defines the self-refresh power down idle period in which memories are
      placed into self-refresh power down mode if bus is idle for
      srpd_lite_idle * 1024 DFI clock cycles. This parameter is for LPDDR4
      only.
      See also rockchip,srpd-lite-idle-ns.

  rockchip,standby_idle:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Defines the standby idle period in which memories are placed into
      self-refresh mode. The controller, pi, PHY and DRAM clock will be gated
      if bus is idle for standby_idle * DFI clock cycles.
      See also rockchip,standby-idle-ns.

  rockchip,dram_dll_dis_freq:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Defines the DDR3 DLL bypass frequency in MHz. When DDR frequency is less
      than DRAM_DLL_DISB_FREQ, DDR3 DLL will be bypassed.
      Note: if DLL was bypassed, the odt will also stop working.

  rockchip,phy_dll_dis_freq:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description: |
      Defines the PHY dll bypass frequency in MHz (Mega Hz). When DDR frequency
      is less than DRAM_DLL_DISB_FREQ, PHY DLL will be bypassed.
      Note: PHY DLL and PHY ODT are independent.

  rockchip,auto_pd_dis_freq:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      Defines the auto PD disable frequency in MHz.

  rockchip,ddr3_odt_dis_freq:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 1000000  # In case anyone thought this was MHz.
    description:
      When the DRAM type is DDR3, this parameter defines the ODT disable
      frequency in Hz. When the DDR frequency is less then ddr3_odt_dis_freq,
      the ODT on the DRAM side and controller side are both disabled.

  rockchip,ddr3_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is DDR3, this parameter defines the DRAM side drive
      strength in ohms.
    default: 40

  rockchip,ddr3_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is DDR3, this parameter defines the DRAM side ODT
      strength in ohms.
    default: 120

  rockchip,phy_ddr3_ca_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is DDR3, this parameter defines the phy side CA line
      (incluing command line, address line and clock line) drive strength.
    default: 40

  rockchip,phy_ddr3_dq_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is DDR3, this parameter defines the PHY side DQ line
      (including DQS/DQ/DM line) drive strength.
    default: 40

  rockchip,phy_ddr3_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is DDR3, this parameter defines the PHY side ODT
      strength.
    default: 240

  rockchip,lpddr3_odt_dis_freq:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 1000000  # In case anyone thought this was MHz.
    description:
      When the DRAM type is LPDDR3, this parameter defines then ODT disable
      frequency in Hz. When DDR frequency is less then ddr3_odt_dis_freq, the
      ODT on the DRAM side and controller side are both disabled.

  rockchip,lpddr3_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR3, this parameter defines the DRAM side drive
      strength in ohms.
    default: 34

  rockchip,lpddr3_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR3, this parameter defines the DRAM side ODT
      strength in ohms.
    default: 240

  rockchip,phy_lpddr3_ca_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR3, this parameter defines the PHY side CA line
      (including command line, address line and clock line) drive strength.
    default: 40

  rockchip,phy_lpddr3_dq_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR3, this parameter defines the PHY side DQ line
      (including DQS/DQ/DM line) drive strength.
    default: 40

  rockchip,phy_lpddr3_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When dram type is LPDDR3, this parameter define the phy side odt
      strength, default value is 240.

  rockchip,lpddr4_odt_dis_freq:
    $ref: /schemas/types.yaml#/definitions/uint32
    minimum: 1000000  # In case anyone thought this was MHz.
    description:
      When the DRAM type is LPDDR4, this parameter defines the ODT disable
      frequency in Hz. When the DDR frequency is less then ddr3_odt_dis_freq,
      the ODT on the DRAM side and controller side are both disabled.

  rockchip,lpddr4_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the DRAM side drive
      strength in ohms.
    default: 60

  rockchip,lpddr4_dq_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the DRAM side ODT on
      DQS/DQ line strength in ohms.
    default: 40

  rockchip,lpddr4_ca_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the DRAM side ODT on
      CA line strength in ohms.
    default: 40

  rockchip,phy_lpddr4_ca_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the PHY side CA line
      (including command address line) drive strength.
    default: 40

  rockchip,phy_lpddr4_ck_cs_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the PHY side clock
      line and CS line drive strength.
    default: 80

  rockchip,phy_lpddr4_dq_drv:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the PHY side DQ line
      (including DQS/DQ/DM line) drive strength.
    default: 80

  rockchip,phy_lpddr4_odt:
    deprecated: true
    $ref: /schemas/types.yaml#/definitions/uint32
    description:
      When the DRAM type is LPDDR4, this parameter defines the PHY side ODT
      strength.
    default: 60

  rockchip,pd-idle-ns:
    description:
      Configure the PD_IDLE value in nanoseconds. Defines the power-down idle
      period in which memories are placed into power-down mode if bus is idle
      for PD_IDLE nanoseconds.

  rockchip,sr-idle-ns:
    description:
      Configure the SR_IDLE value in nanoseconds. Defines the self-refresh idle
      period in which memories are placed into self-refresh mode if bus is idle
      for SR_IDLE nanoseconds.
    default: 0

  rockchip,sr-mc-gate-idle-ns:
    description:
      Defines the memory self-refresh and controller clock gating idle period in nanoseconds.
      Memories are placed into self-refresh mode and memory controller clock
      arg gating started if bus is idle for sr_mc_gate_idle nanoseconds.

  rockchip,srpd-lite-idle-ns:
    description:
      Defines the self-refresh power down idle period in which memories are
      placed into self-refresh power down mode if bus is idle for
      srpd_lite_idle nanoseonds. This parameter is for LPDDR4 only.

  rockchip,standby-idle-ns:
    description:
      Defines the standby idle period in which memories are placed into
      self-refresh mode. The controller, pi, PHY and DRAM clock will be gated
      if bus is idle for standby_idle nanoseconds.

  rockchip,pd-idle-dis-freq-hz:
    description:
      Defines the power-down idle disable frequency in Hz. When the DDR
      frequency is greater than pd-idle-dis-freq, power-down idle is disabled.
      See also rockchip,pd-idle-ns.

  rockchip,sr-idle-dis-freq-hz:
    description:
      Defines the self-refresh idle disable frequency in Hz. When the DDR
      frequency is greater than sr-idle-dis-freq, self-refresh idle is
      disabled. See also rockchip,sr-idle-ns.

  rockchip,sr-mc-gate-idle-dis-freq-hz:
    description:
      Defines the self-refresh and memory-controller clock gating disable
      frequency in Hz. When the DDR frequency is greater than
      sr-mc-gate-idle-dis-freq, the clock will not be gated when idle. See also
      rockchip,sr-mc-gate-idle-ns.

  rockchip,srpd-lite-idle-dis-freq-hz:
    description:
      Defines the self-refresh power down idle disable frequency in Hz. When
      the DDR frequency is greater than srpd-lite-idle-dis-freq, memory will
      not be placed into self-refresh power down mode when idle. See also
      rockchip,srpd-lite-idle-ns.

  rockchip,standby-idle-dis-freq-hz:
    description:
      Defines the standby idle disable frequency in Hz. When the DDR frequency
      is greater than standby-idle-dis-freq, standby idle is disabled. See also
      rockchip,standby-idle-ns.

required:
  - compatible
  - devfreq-events
  - clocks
  - clock-names
  - operating-points-v2
  - center-supply

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/rk3399-cru.h>
    #include <dt-bindings/interrupt-controller/arm-gic.h>
    memory-controller {
      compatible = "rockchip,rk3399-dmc";
      devfreq-events = <&dfi>;
      rockchip,pmu = <&pmu>;
      interrupts = <GIC_SPI 1 IRQ_TYPE_LEVEL_HIGH>;
      clocks = <&cru SCLK_DDRC>;
      clock-names = "dmc_clk";
      operating-points-v2 = <&dmc_opp_table>;
      center-supply = <&ppvar_centerlogic>;
      rockchip,pd-idle-ns = <160>;
      rockchip,sr-idle-ns = <10240>;
      rockchip,sr-mc-gate-idle-ns = <40960>;
      rockchip,srpd-lite-idle-ns = <61440>;
      rockchip,standby-idle-ns = <81920>;
      rockchip,ddr3_odt_dis_freq = <333000000>;
      rockchip,lpddr3_odt_dis_freq = <333000000>;
      rockchip,lpddr4_odt_dis_freq = <333000000>;
      rockchip,pd-idle-dis-freq-hz = <1000000000>;
      rockchip,sr-idle-dis-freq-hz = <1000000000>;
      rockchip,sr-mc-gate-idle-dis-freq-hz = <1000000000>;
      rockchip,srpd-lite-idle-dis-freq-hz = <0>;
      rockchip,standby-idle-dis-freq-hz = <928000000>;
    };