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- From f666d95c1443854555044d3d4b52c463cf845ccc Mon Sep 17 00:00:00 2001
- From: Samuel Holland <[email protected]>
- Date: Sun, 17 Jul 2022 20:33:40 -0500
- Subject: [PATCH 020/117] regulator: dt-bindings: Add Allwinner D1 LDOs
- The Allwinner D1 SoC contains two pairs of in-package LDOs. One pair is
- for general purpose use. LDOA generally powers the board's 1.8 V rail.
- LDOB generally powers the in-package DRAM, where applicable.
- The other pair of LDOs powers the analog power domains inside the SoC,
- including the audio codec, thermal sensor, and ADCs. These LDOs require
- a 0.9 V bandgap voltage reference. The calibration value for the voltage
- reference is stored in an eFuse, accessed via an NVMEM cell.
- Neither LDO control register is in its own MMIO range; instead, each
- regulator device relies on a regmap/syscon exported by its parent.
- Series-changes: 2
- - Remove syscon property from bindings
- - Update binding examples to fix warnings and provide context
- Series-changes: 3
- - Add "reg" property to bindings
- - Add "unevaluatedProperties: true" to regulator nodes
- - Minor changes to regulator node name patterns
- - Remove system-ldos example (now added in patch 3)
- Series-changes: 4
- - Fix the order of the maintainer/description sections
- - Replace unevaluatedProperties with "additionalProperties: false"
- Signed-off-by: Samuel Holland <[email protected]>
- ---
- .../allwinner,sun20i-d1-analog-ldos.yaml | 74 +++++++++++++++++++
- .../allwinner,sun20i-d1-system-ldos.yaml | 37 ++++++++++
- 2 files changed, 111 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-analog-ldos.yaml
- create mode 100644 Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-system-ldos.yaml
- --- /dev/null
- +++ b/Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-analog-ldos.yaml
- @@ -0,0 +1,74 @@
- +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
- +%YAML 1.2
- +---
- +$id: http://devicetree.org/schemas/regulator/allwinner,sun20i-d1-analog-ldos.yaml#
- +$schema: http://devicetree.org/meta-schemas/core.yaml#
- +
- +title: Allwinner D1 Analog LDOs
- +
- +maintainers:
- + - Samuel Holland <[email protected]>
- +
- +description:
- + Allwinner D1 contains a set of LDOs which are designed to supply analog power
- + inside and outside the SoC. They are controlled by a register within the audio
- + codec MMIO space, but which is not part of the audio codec clock/reset domain.
- +
- +properties:
- + compatible:
- + enum:
- + - allwinner,sun20i-d1-analog-ldos
- +
- + reg:
- + maxItems: 1
- +
- + nvmem-cells:
- + items:
- + - description: NVMEM cell for the calibrated bandgap reference trim value
- +
- + nvmem-cell-names:
- + items:
- + - const: bg_trim
- +
- +patternProperties:
- + "^(a|hp)ldo$":
- + type: object
- + $ref: regulator.yaml#
- + unevaluatedProperties: false
- +
- +required:
- + - compatible
- + - reg
- + - nvmem-cells
- + - nvmem-cell-names
- +
- +additionalProperties: false
- +
- +examples:
- + - |
- + audio-codec@2030000 {
- + compatible = "simple-mfd", "syscon";
- + reg = <0x2030000 0x1000>;
- + ranges;
- + #address-cells = <1>;
- + #size-cells = <1>;
- +
- + regulators@2030348 {
- + compatible = "allwinner,sun20i-d1-analog-ldos";
- + reg = <0x2030348 0x4>;
- + nvmem-cells = <&bg_trim>;
- + nvmem-cell-names = "bg_trim";
- +
- + reg_aldo: aldo {
- + regulator-min-microvolt = <1800000>;
- + regulator-max-microvolt = <1800000>;
- + };
- +
- + reg_hpldo: hpldo {
- + regulator-min-microvolt = <1800000>;
- + regulator-max-microvolt = <1800000>;
- + };
- + };
- + };
- +
- +...
- --- /dev/null
- +++ b/Documentation/devicetree/bindings/regulator/allwinner,sun20i-d1-system-ldos.yaml
- @@ -0,0 +1,37 @@
- +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
- +%YAML 1.2
- +---
- +$id: http://devicetree.org/schemas/regulator/allwinner,sun20i-d1-system-ldos.yaml#
- +$schema: http://devicetree.org/meta-schemas/core.yaml#
- +
- +title: Allwinner D1 System LDOs
- +
- +maintainers:
- + - Samuel Holland <[email protected]>
- +
- +description:
- + Allwinner D1 contains a pair of general-purpose LDOs which are designed to
- + supply power inside and outside the SoC. They are controlled by a register
- + within the system control MMIO space.
- +
- +properties:
- + compatible:
- + enum:
- + - allwinner,sun20i-d1-system-ldos
- +
- + reg:
- + maxItems: 1
- +
- +patternProperties:
- + "^ldo[ab]$":
- + type: object
- + $ref: regulator.yaml#
- + unevaluatedProperties: false
- +
- +required:
- + - compatible
- + - reg
- +
- +additionalProperties: false
- +
- +...
|
