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Date: Wed, 18 Dec 2019 15:29:46 -0600
From: Rob Herring <robh@...nel.org>
To: Sowjanya Komatineni <skomatineni@...dia.com>
Cc: thierry.reding@...il.com, jonathanh@...dia.com, digetx@...il.com,
mperttunen@...dia.com, gregkh@...uxfoundation.org,
sboyd@...nel.org, mark.rutland@....com, pdeschrijver@...dia.com,
pgaikwad@...dia.com, spujar@...dia.com, josephl@...dia.com,
daniel.lezcano@...aro.org, mmaddireddy@...dia.com,
markz@...dia.com, devicetree@...r.kernel.org,
linux-clk@...r.kernel.org, linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 04/19] dt-bindings: tegra: Convert Tegra PMC bindings
to YAML
On Tue, Dec 17, 2019 at 12:03:51PM -0800, Sowjanya Komatineni wrote:
> This patch adds YAML schema for Tegra PMC bindings.
$subject says convert. Where's removing the old file?
>
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
> .../bindings/arm/tegra/nvidia,tegra20-pmc.yaml | 291 +++++++++++++++++++++
> 1 file changed, 291 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml
>
> diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml
> new file mode 100644
> index 000000000000..ab614f1be177
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.yaml
> @@ -0,0 +1,291 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$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@...il.com>
> + - Jonathan Hunter <jonathanh@...dia.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
So compatible is supposed to be all 6 strings? You want an 'enum' here.
> +
> + 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:
> + $ref: /schemas/types.yaml#/definitions/uint32
> + description:
> + Pinmux used by the hardware when issuing Poweroff command.
> + Defaults to 0. Valid values are described in section 12.5.2
> + "Pinmux Support" of the Tegra4 Technical Reference Manual.
> +
> + required:
> + - nvidia,i2c-controller-id
> + - nvidia,bus-addr
> + - nvidia,reg-addr
> + - nvidia,reg-data
additionalProperties: false
> +
> + powergates:
> + type: object
> + description:
> + This node contains a hierarchy of power domain nodes, which should
> + match the powergates on the Tegra SoC. Each powergate node
> + represents a power-domain on the Tegra SoC that can be power-gated
> + by the Tegra PMC.
> + Hardware blocks belonging to a power domain should contain
> + "power-domains" property that is a phandle pointing to corresponding
> + powergate node.
> + Please refer to Tegra TRM for mode details on the powergate nodes to
> + use for each power-gate block inside Tegra.
> +
> + patternProperties:
> + "^[a-z0-9]+$":
> + if:
> + type: object
It's better if you have node name patterns to match on than have to do
this if/then.
> + 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'
These need property definitions.
> +
> +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@...0e400 {
> + 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;
> + };
> --
> 2.7.4
>
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