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+# 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:
+ oneOf:
+ - items:
+ - const: nvidia,tegra20-pmc
+ - const: nvidia,tegra20-pmc
+ - const: nvidia,tegra30-pmc
+ - const: nvidia,tegra114-pmc
+ - const: nvidia,tegra124-pmc
+ - const: nvidia,tegra210-pmc
+
+ reg:
+ maxItems: 1
+
+ clock-names:
+ items:
+ - const: pclk, clk32k_in
+ description:
+ pclk is the Tegra clock of that name and clk32k_in is 32KHz clock
+ input to Tegra.
+
+ clocks:
+ maxItems: 2
+
+ '#clock-cells':
+ const: 1
+ description:
+ Tegra PMC has clk_out_1, clk_out_2, and clk_out_3.
+ 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.
+
+ 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:
+ allOf:
+ - $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:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ Pinmux used by the hardware when issuing Poweroff command.
+ Defaults to 0. Valid values are described in section 12.5.2
+ "Pinmux Support" of the Tegra4 Technical Reference Manual.
+
+ required:
+ - nvidia,i2c-controller-id
+ - nvidia,bus-addr
+ - nvidia,reg-addr
+ - nvidia,reg-data
+
+ powergates:
+ type: object
+ description:
+ This node contains a hierarchy of power domain nodes, which should
+ match the powergates on the Tegra SoC. Each powergate node
+ represents a power-domain on the Tegra SoC that can be power-gated
+ by the Tegra PMC.
+ Hardware blocks belonging to a power domain should contain
+ "power-domains" property that is a phandle pointing to corresponding
+ powergate node.
+ Please refer to Tegra TRM for mode details on the powergate nodes to
+ use for each power-gate block inside Tegra.
+
+ patternProperties:
+ "^[a-z0-9]+$":
+ if:
+ type: object
+ then:
+ patternProperties:
+ clocks:
+ 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:
+ 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':
+ description: Must be 0.
+
+ required:
+ - clocks
+ - resets
+ - '#power-domain-cells'
+
+patternProperties:
+ "^.*@[0-9a-f]+$":
+ type: object
+
+ 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
+
+required:
+ - compatible
+ - reg
+ - clock-names
+ - clocks
+ - '#clock-cells'
+
+if:
+ properties:
+ nvidia,suspend-mode:
+ contains:
+ const: 2
+
+then:
+ required:
+ - nvidia,cpu-pwr-good-time
+ - nvidia,cpu-pwr-off-time
+ - nvidia,core-pwr-good-time
+ - nvidia,core-pwr-off-time
+
+examples:
+ - |
+ #include <dt-bindings/soc/tegra-pmc.h>
+
+ pmc: pmc@7000e400 {
+ compatible = "nvidia,tegra210-pmc";
+ reg = <0x0 0x7000e400 0x0 0x400>;
+ clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>;
+ clock-names = "pclk", "clk32k_in";
+ #clock-cells = <1>;
+
+ 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>;
+ };
+ };
+
+ sdmmc1_3v3: sdmmc1-3v3 {
+ pins = "sdmmc1";
+ power-source = <TEGRA_IO_PAD_VOLTAGE_3V3>;
+ };
+
+ sdmmc1_1v8: sdmmc1-1v8 {
+ pins = "sdmmc1";
+ power-source = <TEGRA_IO_PAD_VOLTAGE_1V8>;
+ };
+
+ 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;
+ };
This patch adds YAML schema for Tegra PMC bindings. Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com> --- .../bindings/arm/tegra/nvidia,tegra20-pmc.yaml | 291 +++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml