| # SPDX-License-Identifier: GPL-2.0 |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/arm/tegra/nvidia,tegra20-pmc.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: Tegra Power Management Controller (PMC) |
| |
| maintainers: |
| - Thierry Reding <thierry.reding@gmail.com> |
| - Jonathan Hunter <jonathanh@nvidia.com> |
| |
| properties: |
| compatible: |
| enum: |
| - nvidia,tegra20-pmc |
| - nvidia,tegra20-pmc |
| - nvidia,tegra30-pmc |
| - nvidia,tegra114-pmc |
| - nvidia,tegra124-pmc |
| - nvidia,tegra210-pmc |
| |
| reg: |
| maxItems: 1 |
| description: |
| Offset and length of the register set for the device. |
| |
| clock-names: |
| items: |
| - const: pclk |
| - const: clk32k_in |
| description: |
| Must includes entries pclk and clk32k_in. |
| pclk is the Tegra clock of that name and clk32k_in is 32KHz clock |
| input to Tegra. |
| |
| clocks: |
| maxItems: 2 |
| description: |
| Must contain an entry for each entry in clock-names. |
| See ../clocks/clocks-bindings.txt for details. |
| |
| '#clock-cells': |
| const: 1 |
| description: |
| Tegra PMC has clk_out_1, clk_out_2, and clk_out_3. |
| PMC also has blink control which allows 32Khz clock output to |
| Tegra blink pad. |
| Consumer of PMC clock should specify the desired clock by having |
| the clock ID in its "clocks" phandle cell with pmc clock provider. |
| See include/dt-bindings/soc/tegra-pmc.h for the list of Tegra PMC |
| clock IDs. |
| |
| '#interrupt-cells': |
| const: 2 |
| description: |
| Specifies number of cells needed to encode an interrupt source. |
| The value must be 2. |
| |
| interrupt-controller: true |
| |
| nvidia,invert-interrupt: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: Inverts the PMU interrupt signal. |
| The PMU is an external Power Management Unit, whose interrupt output |
| signal is fed into the PMC. This signal is optionally inverted, and |
| then fed into the ARM GIC. The PMC is not involved in the detection |
| or handling of this interrupt signal, merely its inversion. |
| |
| nvidia,core-power-req-active-high: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: Core power request active-high. |
| |
| nvidia,sys-clock-req-active-high: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: System clock request active-high. |
| |
| nvidia,combined-power-req: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: combined power request for CPU and Core. |
| |
| nvidia,cpu-pwr-good-en: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: |
| CPU power good signal from external PMIC to PMC is enabled. |
| |
| nvidia,suspend-mode: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| enum: [0, 1, 2] |
| description: |
| The suspend mode that the platform should use. |
| Mode 0 is for LP0, CPU + Core voltage off and DRAM in self-refresh |
| Mode 1 is for LP1, CPU voltage off and DRAM in self-refresh |
| Mode 2 is for LP2, CPU voltage off |
| |
| nvidia,cpu-pwr-good-time: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: CPU power good time in uSec. |
| |
| nvidia,cpu-pwr-off-time: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: CPU power off time in uSec. |
| |
| nvidia,core-pwr-good-time: |
| $ref: /schemas/types.yaml#/definitions/uint32-array |
| description: |
| <Oscillator-stable-time Power-stable-time> |
| Core power good time in uSec. |
| |
| nvidia,core-pwr-off-time: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: Core power off time in uSec. |
| |
| nvidia,lp0-vec: |
| $ref: /schemas/types.yaml#/definitions/uint32-array |
| description: |
| <start length> Starting address and length of LP0 vector. |
| The LP0 vector contains the warm boot code that is executed |
| by AVP when resuming from the LP0 state. |
| The AVP (Audio-Video Processor) is an ARM7 processor and |
| always being the first boot processor when chip is power on |
| or resume from deep sleep mode. When the system is resumed |
| from the deep sleep mode, the warm boot code will restore |
| some PLLs, clocks and then brings up CPU0 for resuming the |
| system. |
| |
| i2c-thermtrip: |
| type: object |
| description: |
| On Tegra30, Tegra114 and Tegra124 if i2c-thermtrip subnode exists, |
| hardware-triggered thermal reset will be enabled. |
| |
| properties: |
| nvidia,i2c-controller-id: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: |
| ID of I2C controller to send poweroff command to PMU. |
| Valid values are described in section 9.2.148 |
| "APBDEV_PMC_SCRATCH53_0" of the Tegra K1 Technical Reference |
| Manual. |
| |
| nvidia,bus-addr: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: Bus address of the PMU on the I2C bus. |
| |
| nvidia,reg-addr: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: PMU I2C register address to issue poweroff command. |
| |
| nvidia,reg-data: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: Poweroff command to write to PMU. |
| |
| nvidia,pinmux-id: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: |
| Pinmux used by the hardware when issuing Poweroff command. |
| Defaults to 0. Valid values are described in section 12.5.2 |
| "Pinmux Support" of the Tegra4 Technical Reference Manual. |
| |
| required: |
| - nvidia,i2c-controller-id |
| - nvidia,bus-addr |
| - nvidia,reg-addr |
| - nvidia,reg-data |
| |
| additionalProperties: false |
| |
| powergates: |
| type: object |
| description: | |
| This node contains a hierarchy of power domain nodes, which should |
| match the powergates on the Tegra SoC. Each powergate node |
| represents a power-domain on the Tegra SoC that can be power-gated |
| by the Tegra PMC. |
| Hardware blocks belonging to a power domain should contain |
| "power-domains" property that is a phandle pointing to corresponding |
| powergate node. |
| The name of the powergate node should be one of the below. Note that |
| not every powergate is applicable to all Tegra devices and the following |
| list shows which powergates are applicable to which devices. |
| Please refer to Tegra TRM for mode details on the powergate nodes to |
| use for each power-gate block inside Tegra. |
| Name Description Devices Applicable |
| 3d 3D Graphics Tegra20/114/124/210 |
| 3d0 3D Graphics 0 Tegra30 |
| 3d1 3D Graphics 1 Tegra30 |
| aud Audio Tegra210 |
| dfd Debug Tegra210 |
| dis Display A Tegra114/124/210 |
| disb Display B Tegra114/124/210 |
| heg 2D Graphics Tegra30/114/124/210 |
| iram Internal RAM Tegra124/210 |
| mpe MPEG Encode All |
| nvdec NVIDIA Video Decode Engine Tegra210 |
| nvjpg NVIDIA JPEG Engine Tegra210 |
| pcie PCIE Tegra20/30/124/210 |
| sata SATA Tegra30/124/210 |
| sor Display interfaces Tegra124/210 |
| ve2 Video Encode Engine 2 Tegra210 |
| venc Video Encode Engine All |
| vdec Video Decode Engine Tegra20/30/114/124 |
| vic Video Imaging Compositor Tegra124/210 |
| xusba USB Partition A Tegra114/124/210 |
| xusbb USB Partition B Tegra114/124/210 |
| xusbc USB Partition C Tegra114/124/210 |
| |
| patternProperties: |
| "^[a-z0-9]+$": |
| type: object |
| |
| patternProperties: |
| clocks: |
| minItems: 1 |
| maxItems: 8 |
| description: |
| Must contain an entry for each clock required by the PMC |
| for controlling a power-gate. |
| See ../clocks/clock-bindings.txt document for more details. |
| |
| resets: |
| minItems: 1 |
| maxItems: 8 |
| description: |
| Must contain an entry for each reset required by the PMC |
| for controlling a power-gate. |
| See ../reset/reset.txt for more details. |
| |
| '#power-domain-cells': |
| const: 0 |
| description: Must be 0. |
| |
| required: |
| - clocks |
| - resets |
| - '#power-domain-cells' |
| |
| additionalProperties: false |
| |
| patternProperties: |
| "^[a-f0-9]+-[a-f0-9]+$": |
| type: object |
| description: |
| This is a Pad configuration node. On Tegra SOCs a pad is a set of |
| pins which are configured as a group. The pin grouping is a fixed |
| attribute of the hardware. The PMC can be used to set pad power state |
| and signaling voltage. A pad can be either in active or power down mode. |
| The support for power state and signaling voltage configuration varies |
| depending on the pad in question. 3.3V and 1.8V signaling voltages |
| are supported on pins where software controllable signaling voltage |
| switching is available. |
| |
| The pad configuration state nodes are placed under the pmc node and they |
| are referred to by the pinctrl client properties. For more information |
| see Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt. |
| The pad name should be used as the value of the pins property in pin |
| configuration nodes. |
| |
| The following pads are present on Tegra124 and Tegra132 |
| audio, bb, cam, comp, csia, csb, cse, dsi, dsib, dsic, dsid, hdmi, hsic, |
| hv, lvds, mipi-bias, nand, pex-bias, pex-clk1, pex-clk2, pex-cntrl, |
| sdmmc1, sdmmc3, sdmmc4, sys_ddc, uart, usb0, usb1, usb2, usb_bias. |
| |
| The following pads are present on Tegra210 |
| audio, audio-hv, cam, csia, csib, csic, csid, csie, csif, dbg, |
| debug-nonao, dmic, dp, dsi, dsib, dsic, dsid, emmc, emmc2, gpio, hdmi, |
| hsic, lvds, mipi-bias, pex-bias, pex-clk1, pex-clk2, pex-cntrl, sdmmc1, |
| sdmmc3, spi, spi-hv, uart, usb0, usb1, usb2, usb3, usb-bias. |
| |
| properties: |
| pins: |
| $ref: /schemas/types.yaml#/definitions/string |
| description: Must contain name of the pad(s) to be configured. |
| |
| low-power-enable: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: Configure the pad into power down mode. |
| |
| low-power-disable: |
| $ref: /schemas/types.yaml#/definitions/flag |
| description: Configure the pad into active mode. |
| |
| power-source: |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| description: |
| Must contain either TEGRA_IO_PAD_VOLTAGE_1V8 or |
| TEGRA_IO_PAD_VOLTAGE_3V3 to select between signaling voltages. |
| The values are defined in |
| include/dt-bindings/pinctrl/pinctrl-tegra-io-pad.h. |
| Power state can be configured on all Tegra124 and Tegra132 |
| pads. None of the Tegra124 or Tegra132 pads support signaling |
| voltage switching. |
| All of the listed Tegra210 pads except pex-cntrl support power |
| state configuration. Signaling voltage switching is supported |
| on below Tegra210 pads. |
| audio, audio-hv, cam, dbg, dmic, gpio, pex-cntrl, sdmmc1, |
| sdmmc3, spi, spi-hv, and uart. |
| |
| required: |
| - pins |
| |
| additionalProperties: false |
| |
| required: |
| - compatible |
| - reg |
| - clock-names |
| - clocks |
| - '#clock-cells' |
| |
| additionalProperties: false |
| |
| dependencies: |
| "nvidia,suspend-mode": ["nvidia,core-pwr-off-time", "nvidia,cpu-pwr-off-time"] |
| "nvidia,core-pwr-off-time": ["nvidia,core-pwr-good-time"] |
| "nvidia,cpu-pwr-off-time": ["nvidia,cpu-pwr-good-time"] |
| |
| examples: |
| - | |
| |
| #include <dt-bindings/clock/tegra210-car.h> |
| #include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h> |
| #include <dt-bindings/soc/tegra-pmc.h> |
| |
| tegra_pmc: pmc@7000e400 { |
| compatible = "nvidia,tegra210-pmc"; |
| reg = <0x7000e400 0x400>; |
| clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>; |
| clock-names = "pclk", "clk32k_in"; |
| #clock-cells = <1>; |
| |
| nvidia,invert-interrupt; |
| nvidia,suspend-mode = <0>; |
| nvidia,cpu-pwr-good-time = <0>; |
| nvidia,cpu-pwr-off-time = <0>; |
| nvidia,core-pwr-good-time = <4587 3876>; |
| nvidia,core-pwr-off-time = <39065>; |
| nvidia,core-power-req-active-high; |
| nvidia,sys-clock-req-active-high; |
| |
| powergates { |
| pd_audio: aud { |
| clocks = <&tegra_car TEGRA210_CLK_APE>, |
| <&tegra_car TEGRA210_CLK_APB2APE>; |
| resets = <&tegra_car 198>; |
| #power-domain-cells = <0>; |
| }; |
| |
| pd_xusbss: xusba { |
| clocks = <&tegra_car TEGRA210_CLK_XUSB_SS>; |
| resets = <&tegra_car TEGRA210_CLK_XUSB_SS>; |
| #power-domain-cells = <0>; |
| }; |
| }; |
| }; |
