On Wed, Aug 02, 2023 at 09:31:51PM +0200, Naresh Solanki wrote: > From: Patrick Rudolph <patrick.rudolph@xxxxxxxxxxxxx> > > The TDA38640 chip has different output control mechanisms depending on > its mode of operation. When the chip is in SVID mode, only > hardware-based output control is supported via ENABLE pin. However, when > it operates in PMBus mode, software control works perfectly. > > To enable software control as a workaround in SVID mode, add the DT > property 'infineon,en-svid-control'. This property will enable the > workaround, which utilizes ENABLE pin polarity flipping for output when > the chip is in SVID mode. Why do you need a custom property for this? How come it is not possible to determine what bus you are on? Thanks, Conor. > > Signed-off-by: Patrick Rudolph <patrick.rudolph@xxxxxxxxxxxxx> > Signed-off-by: Naresh Solanki <Naresh.Solanki@xxxxxxxxxxxxx> > --- > .../hwmon/pmbus/infineon,tda38640.yaml | 51 +++++++++++++++++++ > .../devicetree/bindings/trivial-devices.yaml | 2 - > 2 files changed, 51 insertions(+), 2 deletions(-) > create mode 100644 Documentation/devicetree/bindings/hwmon/pmbus/infineon,tda38640.yaml > > diff --git a/Documentation/devicetree/bindings/hwmon/pmbus/infineon,tda38640.yaml b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,tda38640.yaml > new file mode 100644 > index 000000000000..c5924ddf1b47 > --- /dev/null > +++ b/Documentation/devicetree/bindings/hwmon/pmbus/infineon,tda38640.yaml > @@ -0,0 +1,51 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > + > +$id: http://devicetree.org/schemas/hwmon/pmbus/infineon,tda38640.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Infineon TDA38640 Synchronous Buck Regulator with SVID and I2C > + > +maintainers: > + - Naresh Solanki <naresh.solanki@xxxxxxxxxxxxx> > + > +description: | > + The Infineon TDA38640 is a 40A Single-voltage Synchronous Buck > + Regulator with SVID and I2C designed for Industrial use. > + > + Datasheet: https://www.infineon.com/dgdl/Infineon-TDA38640-0000-DataSheet-v02_04-EN.pdf?fileId=8ac78c8c80027ecd018042f2337f00c9 > + > +properties: > + compatible: > + enum: > + - infineon,tda38640 > + > + reg: > + maxItems: 1 > + > + infineon,en-svid-control: > + description: | > + When enabled, it allows the chip to utilize workaround for > + software control of output when operating in SVID mode where > + hardware-based output control is the default behavior. > + type: boolean > + > +required: > + - compatible > + - reg > + > +additionalProperties: false > + > +examples: > + - | > + i2c { > + #address-cells = <1>; > + #size-cells = <0>; > + > + tda38640@40 { > + compatible = "infineon,tda38640"; > + reg = <0x40>; > + }; > + }; > + > diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Documentation/devicetree/bindings/trivial-devices.yaml > index 40bc475ee7e1..86c7d34f63bf 100644 > --- a/Documentation/devicetree/bindings/trivial-devices.yaml > +++ b/Documentation/devicetree/bindings/trivial-devices.yaml > @@ -151,8 +151,6 @@ properties: > - infineon,slb9645tt > # Infineon SLB9673 I2C TPM 2.0 > - infineon,slb9673 > - # Infineon TDA38640 Voltage Regulator > - - infineon,tda38640 > # Infineon TLV493D-A1B6 I2C 3D Magnetic Sensor > - infineon,tlv493d-a1b6 > # Infineon Multi-phase Digital VR Controller xdpe11280 > > base-commit: cb7022b8976e3c4d12cea2e7bb820a2944e2fd7b > -- > 2.41.0 >
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