linux-kernel - [PATCH v3 1/2] dt-bindings: hwmon: ST TSC1641 power monitor

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Message-ID: <20251104003320.1120514-2-igor@reznichenko.net>
Date: Mon,  3 Nov 2025 16:33:19 -0800
From: Igor Reznichenko <igor@...nichenko.net>
To: linux@...ck-us.net,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	corbet@....net
Cc: david.hunter.linux@...il.com,
	devicetree@...r.kernel.org,
	linux-doc@...r.kernel.org,
	linux-hwmon@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	skhan@...uxfoundation.org
Subject: [PATCH v3 1/2] dt-bindings: hwmon: ST TSC1641 power monitor

Add binding for the TSC1641 I2C power monitor.

Signed-off-by: Igor Reznichenko <igor@...nichenko.net>
---
 .../devicetree/bindings/hwmon/st,tsc1641.yaml | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/st,tsc1641.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/st,tsc1641.yaml b/Documentation/devicetree/bindings/hwmon/st,tsc1641.yaml
new file mode 100644
index 000000000000..cb4e41f0f99e
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/st,tsc1641.yaml
@@ -0,0 +1,67 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/st,tsc1641.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ST Microelectronics TSC1641 I2C power monitor
+
+maintainers:
+  - Igor Reznichenko <igor@...nichenko.net>
+
+description: |
+  TSC1641 is a 60 V, 16-bit high-precision power monitor with I2C and
+  MIPI I3C interface
+
+  Datasheets:
+    https://www.st.com/resource/en/datasheet/tsc1641.pdf
+
+properties:
+  compatible:
+    const: st,tsc1641
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description: Optional alert interrupt.
+    maxItems: 1
+
+  shunt-resistor-micro-ohms:
+    description: Shunt resistor value in micro-ohms. Since device has internal
+      16-bit RSHUNT register with 10 uOhm LSB, the maximum value is capped at
+      655.35 mOhm.
+    minimum: 100
+    default: 1000
+    maximum: 655350
+
+  st,alert-polarity-active-high:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description: Default value is 0 which configures the normal polarity of the
+      ALERT pin, being active low open-drain. Setting this to 1 configures the
+      polarity of the ALERT pin to be inverted and active high open-drain.
+      Specify this property to set the alert polarity to active-high.
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        power-sensor@40 {
+            compatible = "st,tsc1641";
+            reg = <0x40>;
+            interrupt-parent = <&gpio1>;
+            interrupts = <1 IRQ_TYPE_LEVEL_LOW>; /* Polarity board dependent */
+            shunt-resistor-micro-ohms = <1000>;
+            st,alert-polarity-active-high;
+        };
+    };
-- 
2.43.0