[PATCH 1/2] dt-bindings: regulator: Add bindings for Richtek RT5739

From: cy_huang
Date: Tue Feb 14 2023 - 21:01:24 EST


From: ChiYuan Huang <cy_huang@xxxxxxxxxxx>

Add the binding document for Richtek RT5739.

Signed-off-by: ChiYuan Huang <cy_huang@xxxxxxxxxxx>
---
.../bindings/regulator/richtek,rt5739.yaml | 80 ++++++++++++++++++++++
1 file changed, 80 insertions(+)
create mode 100644 Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml

diff --git a/Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml b/Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml
new file mode 100644
index 00000000..7dc4f78
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/richtek,rt5739.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/richtek,rt5739.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT5739 2.4MHz 3.5A Step-Down Converter
+
+maintainers:
+ - ChiYuan Huang <cy_huang@xxxxxxxxxxx>
+
+description: |
+ The RT5739 is a step-down switching voltage regulator that delivers a
+ digitally programmable output from an input voltage supply of 2.5V to 5.5V.
+ The output voltage is programmed through an I2C interface capable of
+ operating up to 3.4MHz.
+
+ Using a proprietary architecture with synchronous rectification, the RT5739
+ is capable of delivering 3.5A continuously at over 80% efficiency,
+ maintaining that efficiency at load current as low as 10mA. The regulator
+ operates at a normal fixed frequency of 2.4MHz, which reduces the value of
+ the external components. Additional output capacitance can be added to
+ improve regulation during load transients without affecting stability.
+
+allOf:
+ - $ref: regulator.yaml#
+
+properties:
+ compatible:
+ enum:
+ - richtek,rt5739
+
+ reg:
+ maxItems: 1
+
+ enable-gpios:
+ maxItems: 1
+
+ richtek,vsel-active-high:
+ description: |
+ If property is present, use the 'VSEL1' register group for buck control.
+ Else, use the 'VSEL0' register group. This depends on external hardware
+ 'VSEL' pin connecton.
+ type: boolean
+
+ regulator-allowed-modes:
+ description: |
+ buck allowed operating mode
+ 0: Auto PFM/PWM mode
+ 1: Forced PWM mode
+ maxItems: 2
+ items:
+ enum: [0, 1]
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ regulator@50 {
+ compatible = "richtek,rt5739";
+ reg = <0x50>;
+ enable-gpios = <&gpio26 1 GPIO_ACTIVE_HIGH>;
+ richtek,vsel-active-high;
+ regulator-name = "richtek,rt5739-buck";
+ regulator-min-microvolt = <3000000>;
+ regulator-max-microvolt = <13000000>;
+ regulator-allowed-modes = <0 1>;
+ regulator-boot-on;
+ };
+ };
--
2.7.4