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