1# SPDX-License-Identifier: GPL-2.0
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/arm/tegra/nvidia,tegra20-pmc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Tegra Power Management Controller (PMC)
8
9maintainers:
10  - Thierry Reding <thierry.reding@gmail.com>
11  - Jonathan Hunter <jonathanh@nvidia.com>
12
13properties:
14  compatible:
15    enum:
16      - nvidia,tegra20-pmc
17      - nvidia,tegra20-pmc
18      - nvidia,tegra30-pmc
19      - nvidia,tegra114-pmc
20      - nvidia,tegra124-pmc
21      - nvidia,tegra210-pmc
22
23  reg:
24    maxItems: 1
25    description:
26      Offset and length of the register set for the device.
27
28  clock-names:
29    items:
30      - const: pclk
31      - const: clk32k_in
32    description:
33      Must includes entries pclk and clk32k_in.
34      pclk is the Tegra clock of that name and clk32k_in is 32KHz clock
35      input to Tegra.
36
37  clocks:
38    maxItems: 2
39    description:
40      Must contain an entry for each entry in clock-names.
41      See ../clocks/clocks-bindings.txt for details.
42
43  '#clock-cells':
44    const: 1
45    description:
46      Tegra PMC has clk_out_1, clk_out_2, and clk_out_3.
47      PMC also has blink control which allows 32Khz clock output to
48      Tegra blink pad.
49      Consumer of PMC clock should specify the desired clock by having
50      the clock ID in its "clocks" phandle cell with pmc clock provider.
51      See include/dt-bindings/soc/tegra-pmc.h for the list of Tegra PMC
52      clock IDs.
53
54  '#interrupt-cells':
55    const: 2
56    description:
57      Specifies number of cells needed to encode an interrupt source.
58      The value must be 2.
59
60  interrupt-controller: true
61
62  nvidia,invert-interrupt:
63    $ref: /schemas/types.yaml#/definitions/flag
64    description: Inverts the PMU interrupt signal.
65      The PMU is an external Power Management Unit, whose interrupt output
66      signal is fed into the PMC. This signal is optionally inverted, and
67      then fed into the ARM GIC. The PMC is not involved in the detection
68      or handling of this interrupt signal, merely its inversion.
69
70  nvidia,core-power-req-active-high:
71    $ref: /schemas/types.yaml#/definitions/flag
72    description: Core power request active-high.
73
74  nvidia,sys-clock-req-active-high:
75    $ref: /schemas/types.yaml#/definitions/flag
76    description: System clock request active-high.
77
78  nvidia,combined-power-req:
79    $ref: /schemas/types.yaml#/definitions/flag
80    description: combined power request for CPU and Core.
81
82  nvidia,cpu-pwr-good-en:
83    $ref: /schemas/types.yaml#/definitions/flag
84    description:
85      CPU power good signal from external PMIC to PMC is enabled.
86
87  nvidia,suspend-mode:
88    $ref: /schemas/types.yaml#/definitions/uint32
89    enum: [0, 1, 2]
90    description:
91      The suspend mode that the platform should use.
92      Mode 0 is for LP0, CPU + Core voltage off and DRAM in self-refresh
93      Mode 1 is for LP1, CPU voltage off and DRAM in self-refresh
94      Mode 2 is for LP2, CPU voltage off
95
96  nvidia,cpu-pwr-good-time:
97    $ref: /schemas/types.yaml#/definitions/uint32
98    description: CPU power good time in uSec.
99
100  nvidia,cpu-pwr-off-time:
101    $ref: /schemas/types.yaml#/definitions/uint32
102    description: CPU power off time in uSec.
103
104  nvidia,core-pwr-good-time:
105    $ref: /schemas/types.yaml#/definitions/uint32-array
106    description:
107      <Oscillator-stable-time Power-stable-time>
108      Core power good time in uSec.
109
110  nvidia,core-pwr-off-time:
111    $ref: /schemas/types.yaml#/definitions/uint32
112    description: Core power off time in uSec.
113
114  nvidia,lp0-vec:
115    $ref: /schemas/types.yaml#/definitions/uint32-array
116    description:
117      <start length> Starting address and length of LP0 vector.
118      The LP0 vector contains the warm boot code that is executed
119      by AVP when resuming from the LP0 state.
120      The AVP (Audio-Video Processor) is an ARM7 processor and
121      always being the first boot processor when chip is power on
122      or resume from deep sleep mode. When the system is resumed
123      from the deep sleep mode, the warm boot code will restore
124      some PLLs, clocks and then brings up CPU0 for resuming the
125      system.
126
127  i2c-thermtrip:
128    type: object
129    description:
130      On Tegra30, Tegra114 and Tegra124 if i2c-thermtrip subnode exists,
131      hardware-triggered thermal reset will be enabled.
132
133    properties:
134      nvidia,i2c-controller-id:
135        $ref: /schemas/types.yaml#/definitions/uint32
136        description:
137          ID of I2C controller to send poweroff command to PMU.
138          Valid values are described in section 9.2.148
139          "APBDEV_PMC_SCRATCH53_0" of the Tegra K1 Technical Reference
140          Manual.
141
142      nvidia,bus-addr:
143        $ref: /schemas/types.yaml#/definitions/uint32
144        description: Bus address of the PMU on the I2C bus.
145
146      nvidia,reg-addr:
147        $ref: /schemas/types.yaml#/definitions/uint32
148        description: PMU I2C register address to issue poweroff command.
149
150      nvidia,reg-data:
151        $ref: /schemas/types.yaml#/definitions/uint32
152        description: Poweroff command to write to PMU.
153
154      nvidia,pinmux-id:
155        $ref: /schemas/types.yaml#/definitions/uint32
156        description:
157          Pinmux used by the hardware when issuing Poweroff command.
158          Defaults to 0. Valid values are described in section 12.5.2
159          "Pinmux Support" of the Tegra4 Technical Reference Manual.
160
161    required:
162      - nvidia,i2c-controller-id
163      - nvidia,bus-addr
164      - nvidia,reg-addr
165      - nvidia,reg-data
166
167    additionalProperties: false
168
169  powergates:
170    type: object
171    description: |
172      This node contains a hierarchy of power domain nodes, which should
173      match the powergates on the Tegra SoC. Each powergate node
174      represents a power-domain on the Tegra SoC that can be power-gated
175      by the Tegra PMC.
176      Hardware blocks belonging to a power domain should contain
177      "power-domains" property that is a phandle pointing to corresponding
178      powergate node.
179      The name of the powergate node should be one of the below. Note that
180      not every powergate is applicable to all Tegra devices and the following
181      list shows which powergates are applicable to which devices.
182      Please refer to Tegra TRM for mode details on the powergate nodes to
183      use for each power-gate block inside Tegra.
184      Name		Description			            Devices Applicable
185      3d		  3D Graphics			            Tegra20/114/124/210
186      3d0		  3D Graphics 0		            Tegra30
187      3d1		  3D Graphics 1		            Tegra30
188      aud		  Audio				                Tegra210
189      dfd		  Debug				                Tegra210
190      dis		  Display A			              Tegra114/124/210
191      disb		Display B			              Tegra114/124/210
192      heg		  2D Graphics		            	Tegra30/114/124/210
193      iram		Internal RAM		            Tegra124/210
194      mpe		  MPEG Encode			            All
195      nvdec		NVIDIA Video Decode Engine	Tegra210
196      nvjpg		NVIDIA JPEG Engine		      Tegra210
197      pcie		PCIE				                Tegra20/30/124/210
198      sata		SATA				                Tegra30/124/210
199      sor		  Display interfaces       		Tegra124/210
200      ve2		  Video Encode Engine 2		    Tegra210
201      venc		Video Encode Engine		      All
202      vdec		Video Decode Engine		      Tegra20/30/114/124
203      vic		  Video Imaging Compositor	  Tegra124/210
204      xusba		USB Partition A			        Tegra114/124/210
205      xusbb		USB Partition B 		        Tegra114/124/210
206      xusbc		USB Partition C			        Tegra114/124/210
207
208    patternProperties:
209      "^[a-z0-9]+$":
210        type: object
211
212        patternProperties:
213          clocks:
214            minItems: 1
215            maxItems: 8
216            description:
217              Must contain an entry for each clock required by the PMC
218              for controlling a power-gate.
219              See ../clocks/clock-bindings.txt document for more details.
220
221          resets:
222            minItems: 1
223            maxItems: 8
224            description:
225              Must contain an entry for each reset required by the PMC
226              for controlling a power-gate.
227              See ../reset/reset.txt for more details.
228
229          '#power-domain-cells':
230            const: 0
231            description: Must be 0.
232
233        required:
234          - clocks
235          - resets
236          - '#power-domain-cells'
237
238    additionalProperties: false
239
240patternProperties:
241  "^[a-f0-9]+-[a-f0-9]+$":
242    type: object
243    description:
244      This is a Pad configuration node. On Tegra SOCs a pad is a set of
245      pins which are configured as a group. The pin grouping is a fixed
246      attribute of the hardware. The PMC can be used to set pad power state
247      and signaling voltage. A pad can be either in active or power down mode.
248      The support for power state and signaling voltage configuration varies
249      depending on the pad in question. 3.3V and 1.8V signaling voltages
250      are supported on pins where software controllable signaling voltage
251      switching is available.
252
253      The pad configuration state nodes are placed under the pmc node and they
254      are referred to by the pinctrl client properties. For more information
255      see Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt.
256      The pad name should be used as the value of the pins property in pin
257      configuration nodes.
258
259      The following pads are present on Tegra124 and Tegra132
260      audio, bb, cam, comp, csia, csb, cse, dsi, dsib, dsic, dsid, hdmi, hsic,
261      hv, lvds, mipi-bias, nand, pex-bias, pex-clk1, pex-clk2, pex-cntrl,
262      sdmmc1, sdmmc3, sdmmc4, sys_ddc, uart, usb0, usb1, usb2, usb_bias.
263
264      The following pads are present on Tegra210
265      audio, audio-hv, cam, csia, csib, csic, csid, csie, csif, dbg,
266      debug-nonao, dmic, dp, dsi, dsib, dsic, dsid, emmc, emmc2, gpio, hdmi,
267      hsic, lvds, mipi-bias, pex-bias, pex-clk1, pex-clk2, pex-cntrl, sdmmc1,
268      sdmmc3, spi, spi-hv, uart, usb0, usb1, usb2, usb3, usb-bias.
269
270    properties:
271      pins:
272        $ref: /schemas/types.yaml#/definitions/string
273        description: Must contain name of the pad(s) to be configured.
274
275      low-power-enable:
276        $ref: /schemas/types.yaml#/definitions/flag
277        description: Configure the pad into power down mode.
278
279      low-power-disable:
280        $ref: /schemas/types.yaml#/definitions/flag
281        description: Configure the pad into active mode.
282
283      power-source:
284        $ref: /schemas/types.yaml#/definitions/uint32
285        description:
286          Must contain either TEGRA_IO_PAD_VOLTAGE_1V8 or
287          TEGRA_IO_PAD_VOLTAGE_3V3 to select between signaling voltages.
288          The values are defined in
289          include/dt-bindings/pinctrl/pinctrl-tegra-io-pad.h.
290          Power state can be configured on all Tegra124 and Tegra132
291          pads. None of the Tegra124 or Tegra132 pads support signaling
292          voltage switching.
293          All of the listed Tegra210 pads except pex-cntrl support power
294          state configuration. Signaling voltage switching is supported
295          on below Tegra210 pads.
296          audio, audio-hv, cam, dbg, dmic, gpio, pex-cntrl, sdmmc1,
297          sdmmc3, spi, spi-hv, and uart.
298
299    required:
300      - pins
301
302    additionalProperties: false
303
304required:
305  - compatible
306  - reg
307  - clock-names
308  - clocks
309  - '#clock-cells'
310
311dependencies:
312  "nvidia,suspend-mode": ["nvidia,core-pwr-off-time", "nvidia,cpu-pwr-off-time"]
313  "nvidia,core-pwr-off-time": ["nvidia,core-pwr-good-time"]
314  "nvidia,cpu-pwr-off-time": ["nvidia,cpu-pwr-good-time"]
315
316examples:
317  - |
318
319    #include <dt-bindings/clock/tegra210-car.h>
320    #include <dt-bindings/pinctrl/pinctrl-tegra-io-pad.h>
321    #include <dt-bindings/soc/tegra-pmc.h>
322
323    tegra_pmc: pmc@7000e400 {
324              compatible = "nvidia,tegra210-pmc";
325              reg = <0x7000e400 0x400>;
326              clocks = <&tegra_car TEGRA210_CLK_PCLK>, <&clk32k_in>;
327              clock-names = "pclk", "clk32k_in";
328              #clock-cells = <1>;
329
330              nvidia,invert-interrupt;
331              nvidia,suspend-mode = <0>;
332              nvidia,cpu-pwr-good-time = <0>;
333              nvidia,cpu-pwr-off-time = <0>;
334              nvidia,core-pwr-good-time = <4587 3876>;
335              nvidia,core-pwr-off-time = <39065>;
336              nvidia,core-power-req-active-high;
337              nvidia,sys-clock-req-active-high;
338
339              powergates {
340                    pd_audio: aud {
341                            clocks = <&tegra_car TEGRA210_CLK_APE>,
342                                     <&tegra_car TEGRA210_CLK_APB2APE>;
343                            resets = <&tegra_car 198>;
344                            #power-domain-cells = <0>;
345                    };
346
347                    pd_xusbss: xusba {
348                            clocks = <&tegra_car TEGRA210_CLK_XUSB_SS>;
349                            resets = <&tegra_car TEGRA210_CLK_XUSB_SS>;
350                            #power-domain-cells = <0>;
351                    };
352              };
353    };
354