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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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404005d108
The RK806 PMIC allows to configure its reset/restart behavior whenever the PMIC is reset either programmatically or via some external pins (e.g. PWRCTRL or RESETB). The following modes exist: - 0; restart PMU, - 1; reset all power off reset registers and force state to switch to ACTIVE mode, - 2; same as mode 1 and also pull RESETB pin down for 5ms, For example, some hardware may require a full restart (mode 0) in order to function properly as regulators are shortly interrupted in this mode. This is the case for RK3588 Jaguar and RK3588 Tiger which have a companion microcontroller running on an independent power supply and monitoring the PMIC power rail to know the state of the main system. When it detects a restart, it resets its own IPs exposed to the main system as if to simulate its own reset. Failing to perform this fake reset of the microcontroller may break things (e.g. watchdog not automatically disabled, buzzer still running until manually disabled, leftover configuration from previous main system state, etc...). Some other systems may be depending on the power rails to not be interrupted even for a small amount of time[1]. This allows to specify how the PMIC should perform on the hardware level and may differ between hardware designs, so a DT property seems warranted. I unfortunately do not see how this could be made generic enough to make it a non-vendor property. [1] https://lore.kernel.org/linux-rockchip/2577051.irdbgypaU6@workhorse/ Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de> Reviewed-by: "Rob Herring (Arm)" <robh@kernel.org> Link: https://lore.kernel.org/r/20250627-rk8xx-rst-fun-v4-1-ce05d041b45f@cherry.de Signed-off-by: Lee Jones <lee@kernel.org>
430 lines
14 KiB
YAML
430 lines
14 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/mfd/rockchip,rk806.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: RK806 Power Management Integrated Circuit
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maintainers:
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- Sebastian Reichel <sebastian.reichel@collabora.com>
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description:
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Rockchip RK806 series PMIC. This device consists of an spi or
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i2c controlled MFD that includes multiple switchable regulators.
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properties:
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compatible:
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enum:
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- rockchip,rk806
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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gpio-controller: true
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'#gpio-cells':
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const: 2
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system-power-controller: true
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rockchip,reset-mode:
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$ref: /schemas/types.yaml#/definitions/uint32
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enum: [0, 1, 2]
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description:
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Mode to use when a reset of the PMIC is triggered.
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The reset can be triggered either programmatically, via one of
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the PWRCTRL pins (provided additional configuration) or
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asserting RESETB pin low.
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The following modes are supported
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- 0; restart PMU,
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- 1; reset all power off reset registers and force state to
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switch to ACTIVE mode,
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- 2; same as mode 1 and also pull RESETB pin down for 5ms,
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For example, some hardware may require a full restart (mode 0)
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in order to function properly as regulators are shortly
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interrupted in this mode.
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vcc1-supply:
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description:
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The input supply for dcdc-reg1.
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vcc2-supply:
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description:
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The input supply for dcdc-reg2.
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vcc3-supply:
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description:
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The input supply for dcdc-reg3.
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vcc4-supply:
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description:
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The input supply for dcdc-reg4.
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vcc5-supply:
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description:
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The input supply for dcdc-reg5.
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vcc6-supply:
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description:
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The input supply for dcdc-reg6.
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vcc7-supply:
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description:
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The input supply for dcdc-reg7.
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vcc8-supply:
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description:
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The input supply for dcdc-reg8.
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vcc9-supply:
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description:
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The input supply for dcdc-reg9.
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vcc10-supply:
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description:
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The input supply for dcdc-reg10.
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vcc11-supply:
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description:
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The input supply for pldo-reg1, pldo-reg2 and pldo-reg3.
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vcc12-supply:
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description:
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The input supply for pldo-reg4 and pldo-reg5.
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vcc13-supply:
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description:
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The input supply for nldo-reg1, nldo-reg2 and nldo-reg3.
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vcc14-supply:
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description:
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The input supply for nldo-reg4 and nldo-reg5.
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vcca-supply:
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description:
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The input supply for pldo-reg6.
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regulators:
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type: object
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additionalProperties: false
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patternProperties:
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"^(dcdc-reg([1-9]|10)|pldo-reg[1-6]|nldo-reg[1-5])$":
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type: object
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$ref: /schemas/regulator/regulator.yaml#
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unevaluatedProperties: false
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patternProperties:
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'-pins$':
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type: object
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additionalProperties: false
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$ref: /schemas/pinctrl/pinmux-node.yaml
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properties:
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function:
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enum: [pin_fun0, pin_fun1, pin_fun2, pin_fun3, pin_fun4, pin_fun5]
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pins:
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$ref: /schemas/types.yaml#/definitions/string
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enum: [gpio_pwrctrl1, gpio_pwrctrl2, gpio_pwrctrl3]
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml
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required:
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- compatible
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- reg
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- interrupts
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/pinctrl/rockchip.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/gpio/gpio.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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pmic@0 {
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compatible = "rockchip,rk806";
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reg = <0x0>;
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interrupts = <7 IRQ_TYPE_LEVEL_LOW>;
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vcc1-supply = <&vcc5v0_sys>;
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vcc2-supply = <&vcc5v0_sys>;
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vcc3-supply = <&vcc5v0_sys>;
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vcc4-supply = <&vcc5v0_sys>;
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vcc5-supply = <&vcc5v0_sys>;
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vcc6-supply = <&vcc5v0_sys>;
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vcc7-supply = <&vcc5v0_sys>;
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vcc8-supply = <&vcc5v0_sys>;
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vcc9-supply = <&vcc5v0_sys>;
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vcc10-supply = <&vcc5v0_sys>;
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vcc11-supply = <&vcc_2v0_pldo_s3>;
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vcc12-supply = <&vcc5v0_sys>;
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vcc13-supply = <&vcc5v0_sys>;
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vcc14-supply = <&vcc_1v1_nldo_s3>;
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vcca-supply = <&vcc5v0_sys>;
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regulators {
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vdd_gpu_s0: dcdc-reg1 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <550000>;
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regulator-max-microvolt = <950000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_gpu_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd_npu_s0: dcdc-reg2 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <550000>;
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regulator-max-microvolt = <950000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_npu_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd_log_s0: dcdc-reg3 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <750000>;
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regulator-max-microvolt = <750000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_log_s0";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <750000>;
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};
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};
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vdd_vdenc_s0: dcdc-reg4 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <550000>;
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regulator-max-microvolt = <950000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_vdenc_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd_gpu_mem_s0: dcdc-reg5 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <675000>;
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regulator-max-microvolt = <950000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_gpu_mem_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd_npu_mem_s0: dcdc-reg6 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <675000>;
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regulator-max-microvolt = <950000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_npu_mem_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vcc_2v0_pldo_s3: dcdc-reg7 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <2000000>;
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regulator-max-microvolt = <2000000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_2v0_pldo_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <2000000>;
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};
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};
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vdd_vdenc_mem_s0: dcdc-reg8 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <675000>;
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regulator-max-microvolt = <950000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_vdenc_mem_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd2_ddr_s3: dcdc-reg9 {
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regulator-always-on;
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regulator-boot-on;
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regulator-name = "vdd2_ddr_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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};
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};
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vcc_1v1_nldo_s3: dcdc-reg10 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <1100000>;
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regulator-max-microvolt = <1100000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vcc_1v1_nldo_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <1100000>;
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};
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};
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avcc_1v8_s0: pldo-reg1 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "avcc_1v8_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd1_1v8_ddr_s3: pldo-reg2 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd1_1v8_ddr_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <1800000>;
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};
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};
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vcc_1v8_s3: pldo-reg3 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vcc_1v8_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <1800000>;
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};
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};
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vcc_3v3_s0: pldo-reg4 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vcc_3v3_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vccio_sd_s0: pldo-reg5 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <3300000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vccio_sd_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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master_pldo6_s3: pldo-reg6 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-name = "master_pldo6_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <1800000>;
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};
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};
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vdd_0v75_s3: nldo-reg1 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <750000>;
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regulator-max-microvolt = <750000>;
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regulator-ramp-delay = <12500>;
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regulator-name = "vdd_0v75_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <750000>;
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};
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};
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vdd2l_0v9_ddr_s3: nldo-reg2 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <900000>;
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regulator-max-microvolt = <900000>;
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regulator-name = "vdd2l_0v9_ddr_s3";
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regulator-state-mem {
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regulator-on-in-suspend;
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regulator-suspend-microvolt = <900000>;
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};
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};
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master_nldo3: nldo-reg3 {
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regulator-name = "master_nldo3";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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avdd_0v75_s0: nldo-reg4 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <750000>;
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regulator-max-microvolt = <750000>;
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regulator-name = "avdd_0v75_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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vdd_0v85_s0: nldo-reg5 {
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <850000>;
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regulator-max-microvolt = <850000>;
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regulator-name = "vdd_0v85_s0";
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regulator-state-mem {
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regulator-off-in-suspend;
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};
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};
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};
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};
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};
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