391 lines
12 KiB
YAML
391 lines
12 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/power/rockchip-io-domain.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip SRAM for IO Voltage Domains
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maintainers:
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- Heiko Stuebner <heiko@sntech.de>
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description: |
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IO domain voltages on some Rockchip SoCs are variable but need to be
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kept in sync between the regulators and the SoC using a special
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register.
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A specific example using rk3288
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If the regulator hooked up to a pin like SDMMC0_VDD is 3.3V then
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bit 7 of GRF_IO_VSEL needs to be 0. If the regulator hooked up to
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that same pin is 1.8V then bit 7 of GRF_IO_VSEL needs to be 1.
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Said another way, this driver simply handles keeping bits in the SoCs
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General Register File (GRF) in sync with the actual value of a voltage
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hooked up to the pins.
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Note that this driver specifically does not include
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any logic for deciding what voltage we should set regulators to
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any logic for deciding whether regulators (or internal SoC blocks)
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should have power or not have power
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If there were some other software that had the smarts of making
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decisions about regulators, it would work in conjunction with this
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driver. When that other software adjusted a regulators voltage then
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this driver would handle telling the SoC about it. A good example is
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vqmmc for SD. In that case the dw_mmc driver simply is told about a
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regulator. It changes the regulator between 3.3V and 1.8V at the
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right time. This driver notices the change and makes sure that the
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SoC is on the same page.
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You specify supplies using the standard regulator bindings by including
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a phandle the relevant regulator. All specified supplies must be able
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to report their voltage. The IO Voltage Domain for any non-specified
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supplies will be not be touched.
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properties:
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compatible:
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enum:
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- rockchip,px30-io-voltage-domain
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- rockchip,px30-pmu-io-voltage-domain
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- rockchip,rk3188-io-voltage-domain
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- rockchip,rk3228-io-voltage-domain
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- rockchip,rk3288-io-voltage-domain
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- rockchip,rk3328-io-voltage-domain
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- rockchip,rk3368-io-voltage-domain
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- rockchip,rk3368-pmu-io-voltage-domain
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- rockchip,rk3399-io-voltage-domain
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- rockchip,rk3399-pmu-io-voltage-domain
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- rockchip,rk3568-pmu-io-voltage-domain
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- rockchip,rv1108-io-voltage-domain
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- rockchip,rv1108-pmu-io-voltage-domain
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- rockchip,rv1126-pmu-io-voltage-domain
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required:
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- compatible
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unevaluatedProperties: false
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allOf:
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- $ref: "#/$defs/px30"
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- $ref: "#/$defs/px30-pmu"
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- $ref: "#/$defs/rk3188"
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- $ref: "#/$defs/rk3228"
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- $ref: "#/$defs/rk3288"
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- $ref: "#/$defs/rk3328"
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- $ref: "#/$defs/rk3368"
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- $ref: "#/$defs/rk3368-pmu"
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- $ref: "#/$defs/rk3399"
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- $ref: "#/$defs/rk3399-pmu"
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- $ref: "#/$defs/rk3568-pmu"
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- $ref: "#/$defs/rv1108"
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- $ref: "#/$defs/rv1108-pmu"
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- $ref: "#/$defs/rv1126-pmu"
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$defs:
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px30:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,px30-io-voltage-domain
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then:
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properties:
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vccio1-supply:
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description: The supply connected to VCCIO1.
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vccio2-supply:
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description: The supply connected to VCCIO2.
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vccio3-supply:
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description: The supply connected to VCCIO3.
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vccio4-supply:
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description: The supply connected to VCCIO4.
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vccio5-supply:
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description: The supply connected to VCCIO5.
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vccio6-supply:
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description: The supply connected to VCCIO6.
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vccio-oscgpi-supply:
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description: The supply connected to VCCIO_OSCGPI.
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px30-pmu:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,px30-pmu-io-voltage-domain
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then:
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properties:
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pmuio1-supply:
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description: The supply connected to PMUIO1.
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pmuio2-supply:
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description: The supply connected to PMUIO2.
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rk3188:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3188-io-voltage-domain
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then:
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properties:
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ap0-supply:
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description: The supply connected to AP0_VCC.
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ap1-supply:
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description: The supply connected to AP1_VCC.
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cif-supply:
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description: The supply connected to CIF_VCC.
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flash-supply:
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description: The supply connected to FLASH_VCC.
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lcdc0-supply:
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description: The supply connected to LCD0_VCC.
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lcdc1-supply:
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description: The supply connected to LCD1_VCC.
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vccio0-supply:
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description: The supply connected to VCCIO0.
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vccio1-supply:
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description: The supply connected to VCCIO1. Also labeled as VCCIO2.
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rk3228:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3228-io-voltage-domain
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then:
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properties:
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vccio1-supply:
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description: The supply connected to VCCIO1.
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vccio2-supply:
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description: The supply connected to VCCIO2.
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vccio3-supply:
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description: The supply connected to VCCIO3.
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vccio4-supply:
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description: The supply connected to VCCIO4.
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rk3288:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3288-io-voltage-domain
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then:
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properties:
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audio-supply:
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description: The supply connected to APIO4_VDD.
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bb-supply:
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description: The supply connected to APIO5_VDD.
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dvp-supply:
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description: The supply connected to DVPIO_VDD.
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flash0-supply:
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description: The supply connected to FLASH0_VDD. Typically for eMMC.
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flash1-supply:
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description: The supply connected to FLASH1_VDD. Also known as SDIO1.
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gpio30-supply:
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description: The supply connected to APIO1_VDD.
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gpio1830-supply:
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description: The supply connected to APIO2_VDD.
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lcdc-supply:
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description: The supply connected to LCDC_VDD.
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sdcard-supply:
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description: The supply connected to SDMMC0_VDD.
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wifi-supply:
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description: The supply connected to APIO3_VDD. Also known as SDIO0.
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rk3328:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3328-io-voltage-domain
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then:
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properties:
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vccio1-supply:
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description: The supply connected to VCCIO1.
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vccio2-supply:
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description: The supply connected to VCCIO2.
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vccio3-supply:
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description: The supply connected to VCCIO3.
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vccio4-supply:
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description: The supply connected to VCCIO4.
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vccio5-supply:
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description: The supply connected to VCCIO5.
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vccio6-supply:
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description: The supply connected to VCCIO6.
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pmuio-supply:
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description: The supply connected to VCCIO_PMU.
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rk3368:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3368-io-voltage-domain
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then:
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properties:
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audio-supply:
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description: The supply connected to APIO3_VDD.
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dvp-supply:
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description: The supply connected to DVPIO_VDD.
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flash0-supply:
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description: The supply connected to FLASH0_VDD. Typically for eMMC.
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gpio30-supply:
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description: The supply connected to APIO1_VDD.
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gpio1830-supply:
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description: The supply connected to APIO4_VDD.
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sdcard-supply:
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description: The supply connected to SDMMC0_VDD.
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wifi-supply:
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description: The supply connected to APIO2_VDD. Also known as SDIO0.
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rk3368-pmu:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3368-pmu-io-voltage-domain
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then:
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properties:
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pmu-supply:
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description: The supply connected to PMUIO_VDD.
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vop-supply:
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description: The supply connected to LCDC_VDD.
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rk3399:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3399-io-voltage-domain
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then:
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properties:
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audio-supply:
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description: The supply connected to APIO5_VDD.
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bt656-supply:
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description: The supply connected to APIO2_VDD.
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gpio1830-supply:
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description: The supply connected to APIO4_VDD.
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sdmmc-supply:
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description: The supply connected to SDMMC0_VDD.
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rk3399-pmu:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3399-pmu-io-voltage-domain
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then:
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properties:
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pmu1830-supply:
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description: The supply connected to PMUIO2_VDD.
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rk3568-pmu:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rk3568-pmu-io-voltage-domain
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then:
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properties:
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pmuio1-supply:
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description: The supply connected to PMUIO1.
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pmuio2-supply:
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description: The supply connected to PMUIO2.
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vccio1-supply:
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description: The supply connected to VCCIO1.
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vccio2-supply:
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description: The supply connected to VCCIO2.
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vccio3-supply:
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description: The supply connected to VCCIO3.
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vccio4-supply:
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description: The supply connected to VCCIO4.
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vccio5-supply:
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description: The supply connected to VCCIO5.
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vccio6-supply:
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description: The supply connected to VCCIO6.
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vccio7-supply:
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description: The supply connected to VCCIO7.
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rv1108:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rv1108-io-voltage-domain
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then:
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properties:
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vccio1-supply:
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description: The supply connected to APIO1_VDD.
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vccio2-supply:
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description: The supply connected to APIO2_VDD.
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vccio3-supply:
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description: The supply connected to APIO3_VDD.
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vccio5-supply:
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description: The supply connected to APIO5_VDD.
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vccio6-supply:
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description: The supply connected to APIO6_VDD.
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rv1108-pmu:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rv1108-pmu-io-voltage-domain
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then:
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properties:
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pmu-supply:
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description: The supply connected to PMUIO_VDD.
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rv1126-pmu:
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if:
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properties:
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compatible:
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contains:
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const: rockchip,rv1126-pmu-io-voltage-domain
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then:
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properties:
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vccio1-supply:
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description: The supply connected to VCCIO1.
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vccio2-supply:
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description: The supply connected to VCCIO2.
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vccio3-supply:
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description: The supply connected to VCCIO3.
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vccio4-supply:
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description: The supply connected to VCCIO4.
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vccio5-supply:
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description: The supply connected to VCCIO5.
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vccio6-supply:
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description: The supply connected to VCCIO6.
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vccio7-supply:
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description: The supply connected to VCCIO7.
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pmuio0-supply:
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description: The supply connected to PMUIO0.
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pmuio1-supply:
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description: The supply connected to PMUIO1.
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examples:
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- |
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io-domains {
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compatible = "rockchip,rk3288-io-voltage-domain";
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audio-supply = <&vcc18_codec>;
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bb-supply = <&vcc33_io>;
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dvp-supply = <&vcc_18>;
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flash0-supply = <&vcc18_flashio>;
|
||
|
|
gpio1830-supply = <&vcc33_io>;
|
||
|
|
gpio30-supply = <&vcc33_pmuio>;
|
||
|
|
lcdc-supply = <&vcc33_lcd>;
|
||
|
|
sdcard-supply = <&vccio_sd>;
|
||
|
|
wifi-supply = <&vcc18_wl>;
|
||
|
|
};
|