[PATCH] dt-bindings: thermal: ti,omap-bandgap: Convert to DT schema
From: Bhargav Joshi
Date: Thu Jul 30 2026 - 15:13:18 EST
Convert Texas Instruments OMAP SCM bandgap from legacy text to DT schema
Add "ti,dra752-bandgap" to compatible which was missing in text binding
but used and matched by same driver.
Document the "#thermal-sensor-cells" property, which was missing from
the original text binding but is required in practice by all in-tree
users via the common thermal-sensor.yaml binding.
Signed-off-by: Bhargav Joshi <j.bhargav.u@xxxxxxxxx>
---
.../bindings/thermal/ti,omap-bandgap.yaml | 227 +++++++++++++++++++++
.../devicetree/bindings/thermal/ti_soc_thermal.txt | 88 --------
2 files changed, 227 insertions(+), 88 deletions(-)
diff --git a/Documentation/devicetree/bindings/thermal/ti,omap-bandgap.yaml b/Documentation/devicetree/bindings/thermal/ti,omap-bandgap.yaml
new file mode 100644
index 000000000000..5afd10a84f70
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/ti,omap-bandgap.yaml
@@ -0,0 +1,227 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/thermal/ti,omap-bandgap.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments OMAP SCM bandgap
+
+maintainers:
+ - Eduardo Valentin <edubezval@xxxxxxxxx>
+
+description:
+ In the System Control Module, OMAP supplies a voltage reference and a
+ temperature sensor feature that are gathered in the band gap voltage and
+ temperature sensor (VBGAPTS) module. The band gap provides current and
+ voltage reference for its internal circuits and other analog IP blocks. The
+ analog-to-digital converter (ADC) produces an output value that is
+ proportional to the silicon temperature.
+
+properties:
+ compatible:
+ enum:
+ - ti,omap34xx-bandgap
+ - ti,omap36xx-bandgap
+ - ti,omap4430-bandgap
+ - ti,omap4460-bandgap
+ - ti,omap4470-bandgap
+ - ti,omap5430-bandgap
+ - ti,dra752-bandgap
+
+ reg:
+ minItems: 1
+ maxItems: 6
+
+ interrupts:
+ maxItems: 1
+
+ gpios:
+ maxItems: 1
+ description:
+ used to inform which GPIO line the tshut signal is routed to. The
+ informed GPIO will be treated as an IRQ;
+
+ "#thermal-sensor-cells":
+ enum: [0, 1]
+
+required:
+ - compatible
+ - reg
+
+allOf:
+ - $ref: thermal-sensor.yaml#
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - ti,omap34xx-bandgap
+ - ti,omap36xx-bandgap
+
+ then:
+ properties:
+ reg:
+ minItems: 1
+ maxItems: 1
+
+ interrupts: false
+
+ gpios: false
+
+ "#thermal-sensor-cells":
+ const: 0
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: ti,omap4430-bandgap
+
+ then:
+ properties:
+ reg:
+ minItems: 2
+ maxItems: 2
+
+ interrupts: false
+
+ "#thermal-sensor-cells":
+ const: 0
+
+ required:
+ - gpios
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - ti,omap4460-bandgap
+ - ti,omap4470-bandgap
+
+ then:
+ properties:
+ reg:
+ minItems: 3
+ maxItems: 3
+
+ interrupts:
+ maxItems: 1
+
+ "#thermal-sensor-cells":
+ const: 0
+
+ required:
+ - interrupts
+ - gpios
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: ti,omap5430-bandgap
+
+ then:
+ properties:
+ reg:
+ minItems: 4
+ maxItems: 4
+
+ interrupts:
+ maxItems: 1
+
+ gpios: false
+
+ "#thermal-sensor-cells":
+ const: 1
+
+ required:
+ - interrupts
+
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: ti,dra752-bandgap
+
+ then:
+ properties:
+ reg:
+ minItems: 6
+ maxItems: 6
+
+ interrupts:
+ maxItems: 1
+
+ gpios: false
+
+ "#thermal-sensor-cells":
+ const: 1
+
+ required:
+ - interrupts
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ bandgap@48002524 {
+ compatible = "ti,omap34xx-bandgap";
+ reg = <0x48002524 0x4>;
+ #thermal-sensor-cells = <0>;
+ };
+
+ - |
+ bandgap@48002524 {
+ compatible = "ti,omap36xx-bandgap";
+ reg = <0x48002524 0x4>;
+ #thermal-sensor-cells = <0>;
+ };
+
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ bandgap@4a002260 {
+ compatible = "ti,omap4430-bandgap";
+ reg = <0x4a002260 0x4>, <0x4a00232c 0x4>;
+ gpios = <&gpio3 22 GPIO_ACTIVE_HIGH>; /* tshut */
+ #thermal-sensor-cells = <0>;
+ };
+
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ bandgap@4a002260 {
+ compatible = "ti,omap4460-bandgap";
+ reg = <0x4a002260 0x4>, <0x4a00232c 0x4>, <0x4a002378 0x18>;
+ interrupts = <0 126 IRQ_TYPE_LEVEL_HIGH>; /* talert */
+ gpios = <&gpio3 22 GPIO_ACTIVE_HIGH>; /* tshut */
+ #thermal-sensor-cells = <0>;
+ };
+
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ bandgap@4a0021e0 {
+ compatible = "ti,omap5430-bandgap";
+ reg = <0x4a0021e0 0xc>, <0x4a00232c 0xc>,
+ <0x4a002380 0x2c>, <0x4a0023c0 0x3c>;
+ interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>; /* talert */
+ #thermal-sensor-cells = <1>;
+ };
+
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ bandgap@4a0021e0 {
+ compatible = "ti,dra752-bandgap";
+ reg = <0x4a0021e0 0xc>, <0x4a00232c 0xc>,
+ <0x4a002380 0x2c>, <0x4a0023c0 0x3c>,
+ <0x4a002564 0x8>, <0x4a002574 0x50>;
+ interrupts = <GIC_SPI 121 IRQ_TYPE_LEVEL_HIGH>; /* talert */
+ #thermal-sensor-cells = <1>;
+ };
diff --git a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt
deleted file mode 100644
index 6299dd8de339..000000000000
--- a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt
+++ /dev/null
@@ -1,88 +0,0 @@
-* Texas Instrument OMAP SCM bandgap bindings
-
-In the System Control Module, OMAP supplies a voltage reference
-and a temperature sensor feature that are gathered in the band
-gap voltage and temperature sensor (VBGAPTS) module. The band
-gap provides current and voltage reference for its internal
-circuits and other analog IP blocks. The analog-to-digital
-converter (ADC) produces an output value that is proportional
-to the silicon temperature.
-
-Required properties:
-- compatible : Should be:
- - "ti,omap34xx-bandgap" : for OMAP34xx bandgap
- - "ti,omap36xx-bandgap" : for OMAP36xx bandgap
- - "ti,omap4430-bandgap" : for OMAP4430 bandgap
- - "ti,omap4460-bandgap" : for OMAP4460 bandgap
- - "ti,omap4470-bandgap" : for OMAP4470 bandgap
- - "ti,omap5430-bandgap" : for OMAP5430 bandgap
-- interrupts : this entry should indicate which interrupt line
-the talert signal is routed to;
-Specific:
-- gpios : this entry should be used to inform which GPIO
-line the tshut signal is routed to. The informed GPIO will
-be treated as an IRQ;
-- regs : this entry must also be specified and it is specific
-to each bandgap version, because the mapping may change from
-soc to soc, apart of depending on available features.
-
-Example:
-OMAP34xx:
-bandgap {
- reg = <0x48002524 0x4>;
- compatible = "ti,omap34xx-bandgap";
-};
-
-OMAP36xx:
-bandgap {
- reg = <0x48002524 0x4>;
- compatible = "ti,omap36xx-bandgap";
-};
-
-OMAP4430:
-bandgap {
- reg = <0x4a002260 0x4 0x4a00232C 0x4>;
- compatible = "ti,omap4430-bandgap";
-};
-
-OMAP4460:
-bandgap {
- reg = <0x4a002260 0x4
- 0x4a00232C 0x4
- 0x4a002378 0x18>;
- compatible = "ti,omap4460-bandgap";
- interrupts = <0 126 4>; /* talert */
- gpios = <&gpio3 22 0>; /* tshut */
-};
-
-OMAP4470:
-bandgap {
- reg = <0x4a002260 0x4
- 0x4a00232C 0x4
- 0x4a002378 0x18>;
- compatible = "ti,omap4470-bandgap";
- interrupts = <0 126 4>; /* talert */
- gpios = <&gpio3 22 0>; /* tshut */
-};
-
-OMAP5430:
-bandgap {
- reg = <0x4a0021e0 0xc
- 0x4a00232c 0xc
- 0x4a002380 0x2c
- 0x4a0023C0 0x3c>;
- compatible = "ti,omap5430-bandgap";
- interrupts = <0 126 4>; /* talert */
-};
-
-DRA752:
-bandgap {
- reg = <0x4a0021e0 0xc
- 0x4a00232c 0xc
- 0x4a002380 0x2c
- 0x4a0023C0 0x3c
- 0x4a002564 0x8
- 0x4a002574 0x50>;
- compatible = "ti,dra752-bandgap";
- interrupts = <0 126 4>; /* talert */
-};
---
base-commit: fc02acf6ac0ccde0c805c2daa9148683cdd01ba8
change-id: 20260730-ti-bandgap-f7b3c67af6a6
Best regards,
--
Bhargav