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Date: Wed, 2 Aug 2023 21:31:51 +0200
From: Naresh Solanki <naresh.solanki@...ements.com>
To: Guenter Roeck <linux@...ck-us.net>,
Jean Delvare <jdelvare@...e.com>,
krzysztof.kozlowski+dt@...aro.org,
Rob Herring <robh+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Naresh Solanki <naresh.solanki@...ements.com>
Cc: linux-hwmon@...r.kernel.org,
Patrick Rudolph <patrick.rudolph@...ements.com>,
Naresh Solanki <Naresh.Solanki@...ements.com>,
Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/3] dt-bindings: hwmon: Add Infineon TDA38640
From: Patrick Rudolph <patrick.rudolph@...ements.com>
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.
Signed-off-by: Patrick Rudolph <patrick.rudolph@...ements.com>
Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
---
.../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@...ements.com>
+
+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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