dt-bindings: mfd: twl: Add missing sub-nodes for TWL4030 & TWL603x

+ be paired with a generic fallback (generally for power

Documentation/devicetree/bindings/mfd/ti,twl.yaml +21 -0

+    additionalProperties: false
+    properties:
+      compatible:
+        oneOf:
+          - enum:
+              - ti,twl4030-power
+              - ti,twl4030-power-reset
+              - ti,twl4030-power-idle
+              - ti,twl4030-power-idle-osc-off
+              # Add all board-specific compatibles for completeness
+              - ti,twl4030-power-omap3-sdp
+              - ti,twl4030-power-omap3-ldp
+              - ti,twl4030-power-omap3-evm
+              - ti,twl4030-power-beagleboard-xm
+              - ti,twl4030-power-n900
+          - items:
+              - enum:
+                  - ti,twl4030-power
+                  - ti,twl4030-power-reset
+                  - ti,twl4030-power-idle
+                  - ti,twl4030-power-idle-osc-off

Quoted 1 line

+ - ti,twl4030-power-idle-osc-off

this allows quite weird combinations like
"ti,twl4030-power-idle", "ti,twl4030-power-idle".
I would propose to rather clean this up to things used in twl4030-power.c and at the same time available in dts, also taking the brush in the dts. I do not expect that these specific compatibles are in use anywhere. I looked around earlier.

Regards,
Andreas

Quoted 11 lines

Quoted 1 line

+ - ti,twl4030-power-idle-osc-off

this allows quite weird combinations like
"ti,twl4030-power-idle", "ti,twl4030-power-idle".
I would propose to rather clean this up to things used in twl4030-power.c and at the same time available in dts, also taking the brush in the dts. I do not expect that these specific compatibles are in use anywhere. I looked around earlier.

Regards,
Andreas

Hi Andreas,

Thank you for the feedback. I've done a deeper investigation into the 'power:compatible' strings to see if the schema could be made stricter.

While cleaning up the list, I found an existing DTSI file (logicpd-torpedo-som.dtsi) that uses the combination:
'compatible = "ti,twl4030-power-idle-osc-off", "ti,twl4030-power-idle";'

Since this "idle, idle" combination is already in use, it seems we cannot make the schema stricter without breaking this existing board.

Am Wed, 3 Sep 2025 00:55:25 +0200
schrieb Jihed Chaibi <[email protected]>:

Quoted 18 lines

Quoted 11 lines

Quoted 1 line

+ - ti,twl4030-power-idle-osc-off

this allows quite weird combinations like
"ti,twl4030-power-idle", "ti,twl4030-power-idle".
I would propose to rather clean this up to things used in twl4030-power.c and at the same time available in dts, also taking the brush in the dts. I do not expect that these specific compatibles are in use anywhere. I looked around earlier.

Regards,
Andreas

Hi Andreas,

Thank you for the feedback. I've done a deeper investigation into the 'power:compatible' strings to see if the schema could be made stricter.

Quoted 8 lines

While cleaning up the list, I found an existing DTSI file (logicpd-torpedo-som.dtsi) that uses the combination:
'compatible = "ti,twl4030-power-idle-osc-off", "ti,twl4030-power-idle";'

Since this "idle, idle" combination is already in use, it seems we cannot make the schema stricter without breaking this existing board.

well the only maybe fallback line I see here is ti,twl4030-power-idle-osc-off -> ti,twl4030-power-idle -> ti,twl4030-power.
But you allow "twl,twl4030-power-idle", "ti,twl4030-power-idle" That absolutely makes no sense.

Then the question is whether there is the need for fallback compatibles. They are needed if there is one piece of software which does only know the fallback and can use the hardware in some limited mode, e.g. u-boot using some mmc controller only without some high speed mode. Looking around, I do not find anything in u-boot or barebox for the twl4030-power compatibles.

And if we define "ti,twl4030-power-idle" as a fallback for "ti,twl4030-power-idle-osc-off", then it is a fallback for everyone using "ti,twl4030-power-idle-osc-off", so then the dts would need to be corrected.

There is one exception: "ti,twl4030-power-omap3-evm" is still used but not everybody knows it (e.g. pm34xx.c), so there is a reason for a fallback compatible:"ti,twl4030-power-idle"

And the rest, time for the brush and lets not totally mess up ti,twl.yaml.

Update the main TI TWL-family binding to be self-contained and to fix pre-existing validation errors.

Following maintainer feedback, the simple power and PWM bindings are now defined directly within this file, and their legacy .txt files are removed.

To ensure future patches are bisectable, child nodes whose bindings are in other patches (audio, keypad, usb, etc.) are now defined using a flexible 'additionalProperties: true' pattern. This removes hard dependencies between the MFD and subsystem bindings.

The complete dtbs_check for this binding is clean except for two warnings originating from pre-existing bugs in the OMAP DTS files, for which fixes have already been submitted separately [1][2].

Signed-off-by Jihed Chaibi <[email protected]>

---
Changes in v5:
- Restructured the entire binding to define properties at the top level instead of if/then blocks, per maintainer feedback.
- Added specific compatible enums for new child nodes instead of a generic 'compatible: true'.
- Set 'unevaluatedProperties: false' for 'pwm' and 'pwmled' nodes to enforce strict validation.
- Expanded 'power' node compatible enum to include all board-specific compatible strings (used in existing device trees, e.g. OMAP3-based boards) for more complete coverage.
- Corrected the schema for the 'power' node compatible to properly handle single and fallback entries.

Changes in v4:
- Reworked binding to be independent and bisectable per maintainer feedback by using 'additionalProperties: true' for child nodes.
- Added board-specific compatibles to the 'power' node enum.
- Added definitions for 'clocks' and 'clock-names' properties.
- Renamed 'twl6030-usb' child node to 'usb-comparator' to match existing Device Tree usage (twl6030.dtsi).
- Fixed some spelling/grammar erros in the description.

Changes in v3:
- New patch to consolidate simple bindings (power, pwm) and add definitions for all child nodes to fix dtbs_check validation errors found in v2.

Changes in v2:
- This patch is split from larger series [3] per maintainer feedback.
- Added missing sub-node definitions, resolving dtbs_check errors.

[1] https://lore.kernel.org/all/[email protected]/
[2] https://lore.kernel.org/all/[email protected]/
[3] https://lore.kernel.org/all/[email protected]/

---
 .../devicetree/bindings/mfd/ti,twl.yaml       | 159 +++++++++++++++++-
 .../devicetree/bindings/mfd/twl4030-power.txt |  48 ------
 .../devicetree/bindings/pwm/ti,twl-pwm.txt    |  17 --
 .../devicetree/bindings/pwm/ti,twl-pwmled.txt |  17 --
 4 files changed, 157 insertions(+), 84 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/mfd/twl4030-power.txt
 delete mode 100644 Documentation/devicetree/bindings/pwm/ti,twl-pwm.txt
 delete mode 100644 Documentation/devicetree/bindings/pwm/ti,twl-pwmled.txt

Documentation/devicetree/bindings/mfd/ti,twl.yaml +8 -2

index f162ab60c09..397eed9b628 100644
@@ -11,9 +11,9 @@ maintainers:
 
 description: |
   The TWLs are Integrated Power Management Chips.
-  Some version might contain much more analog function like
+  Some versions might contain much more analog functionality like
   USB transceiver or Audio amplifier.
-  These chips are connected to an i2c bus.
+  These chips are connected to an I2C bus.
 
 allOf:
   - if:

@@ -181,6 +181,12 @@ properties:
   "#clock-cells":
     const: 1
 
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: fck
+
   charger:
     type: object
     additionalProperties: true

Documentation/devicetree/bindings/mfd/ti,twl.yaml +44 -0

+    required:
+      - compatible
+      - '#pwm-cells'
+
+  pwmled:
+    type: object
+    $ref: /schemas/pwm/pwm.yaml#
+    unevaluatedProperties: false
+    description:
+      PWM controllers connected to LED terminals (PWMA and PWMB on TWL4030,
+      LED PWM on TWL6030/32, mainly used as charging indicator LED).
+    properties:
+      compatible:
+        enum:
+          - ti,twl4030-pwmled
+          - ti,twl6030-pwmled
+      '#pwm-cells':
+        const: 2
+    required:
+      - compatible
+      - '#pwm-cells'
+
+  twl4030-usb:
+    type: object
+    additionalProperties: true
+    properties:
+      compatible:
+        const: ti,twl4030-usb
+
+  usb-comparator:
+    type: object
+    additionalProperties: true
+    properties:
+      compatible:
+        const: ti,twl6030-usb
+
+  gpio:
+    type: object
+    additionalProperties: true
+    properties:
+      compatible:
+        const: ti,twl4030-gpio
+
+  power:

Documentation/devicetree/bindings/mfd/ti,twl.yaml +68 -0

+    additionalProperties: false
+    properties:
+      compatible:
+        oneOf:
+          - enum:
+              - ti,twl4030-power
+              - ti,twl4030-power-reset
+              - ti,twl4030-power-idle
+              - ti,twl4030-power-idle-osc-off
+              # Add all board-specific compatibles for completeness
+              - ti,twl4030-power-omap3-sdp
+              - ti,twl4030-power-omap3-ldp
+              - ti,twl4030-power-omap3-evm
+              - ti,twl4030-power-beagleboard-xm
+              - ti,twl4030-power-n900
+          - items:
+              - enum:
+                  - ti,twl4030-power
+                  - ti,twl4030-power-reset
+                  - ti,twl4030-power-idle
+                  - ti,twl4030-power-idle-osc-off
+                  # Add all board-specific compatibles for completeness
+                  - ti,twl4030-power-omap3-sdp
+                  - ti,twl4030-power-omap3-ldp
+                  - ti,twl4030-power-omap3-evm
+                  - ti,twl4030-power-beagleboard-xm
+                  - ti,twl4030-power-n900
+              - enum:
+                  # Fallback (for power saving mode)
+                  - ti,twl4030-power-idle
+                  - ti,twl4030-power-idle-osc-off
+      ti,system-power-controller:
+        type: boolean
+        deprecated: true
+        description:
+          DEPRECATED. The standard 'system-power-controller'
+          property on the parent node should be used instead.
+      ti,use_poweroff:
+        type: boolean
+        deprecated: true
+        description: DEPRECATED, to be removed.
+    required:
+      - compatible
+
 patternProperties:
   "^regulator-":
     type: object

@@ -271,6 +402,16 @@ examples:
           compatible = "ti,twl6030-vmmc";
           ti,retain-on-reset;
         };
+
+        pwm {
+          compatible = "ti,twl6030-pwm";
+          #pwm-cells = <2>;
+        };
+
+        pwmled {
+          compatible = "ti,twl6030-pwmled";
+          #pwm-cells = <2>;
+        };
       };
     };
 

@@ -325,6 +466,20 @@ examples:
         watchdog {
           compatible = "ti,twl4030-wdt";
         };
+
+        power {
+          compatible = "ti,twl4030-power";
+        };
+
+        pwm {
+          compatible = "ti,twl4030-pwm";
+          #pwm-cells = <2>;
+        };
+
+        pwmled {
+          compatible = "ti,twl4030-pwmled";
+          #pwm-cells = <2>;
+        };
       };
     };
...

Documentation/devicetree/bindings/mfd/twl4030-power.txt deleted +0 -48

deleted file mode 100644
index 3d19963312c..00000000000
@@ -1,48 +0,0 @@
-Texas Instruments TWL family (twl4030) reset and power management module
-
-The power management module inside the TWL family provides several facilities
-to control the power resources, including power scripts. For now, the
-binding only supports the complete shutdown of the system after poweroff.
-
-Required properties:
-- compatible : must be one of the following
-	"ti,twl4030-power"
-	"ti,twl4030-power-reset"
-	"ti,twl4030-power-idle"
-	"ti,twl4030-power-idle-osc-off"
-
-The use of ti,twl4030-power-reset is recommended at least on
-3530 that needs a special configuration for warm reset to work.
-
-When using ti,twl4030-power-idle, the TI recommended configuration
-for idle modes is loaded to the tlw4030 PMIC.
-
-When using ti,twl4030-power-idle-osc-off, the TI recommended
-configuration is used with the external oscillator being shut
-down during off-idle. Note that this does not work on all boards
-depending on how the external oscillator is wired.
-
-Optional properties:
-
-- ti,system-power-controller: This indicates that TWL4030 is the
-  power supply master of the system. With this flag, the chip will
-  initiate an ACTIVE-to-OFF or SLEEP-to-OFF transition when the
-  system poweroffs.
-
-- ti,use_poweroff: Deprecated name for ti,system-power-controller
-
-Example:
-&i2c1 {
-	clock-frequency = <2600000>;
-
-	twl: twl@48 {
-		reg = <0x48>;
-		interrupts = <7>; /* SYS_NIRQ cascaded to intc */
-		interrupt-parent = <&intc>;
-
-		twl_power: power {
-			compatible = "ti,twl4030-power";
-			ti,use_poweroff;
-		};
-	};
-};

Documentation/devicetree/bindings/pwm/ti,twl-pwm.txt deleted +0 -17

deleted file mode 100644
index d97ca1964e9..00000000000
@@ -1,17 +0,0 @@
-Texas Instruments TWL series PWM drivers
-
-Supported PWMs:
-On TWL4030 series: PWM1 and PWM2
-On TWL6030 series: PWM0 and PWM1
-
-Required properties:
-- compatible: "ti,twl4030-pwm" or "ti,twl6030-pwm"
-- #pwm-cells: should be 2. See pwm.yaml in this directory for a description of
-  the cells format.
-
-Example:
-
-twl_pwm: pwm {
-	compatible = "ti,twl6030-pwm";
-	#pwm-cells = <2>;
-};

Documentation/devicetree/bindings/pwm/ti,twl-pwmled.txt deleted +0 -17

deleted file mode 100644
index 31ca1b032ef..00000000000
@@ -1,17 +0,0 @@
-Texas Instruments TWL series PWM drivers connected to LED terminals
-
-Supported PWMs:
-On TWL4030 series: PWMA and PWMB (connected to LEDA and LEDB terminals)
-On TWL6030 series: LED PWM (mainly used as charging indicator LED)
-
-Required properties:
-- compatible: "ti,twl4030-pwmled" or "ti,twl6030-pwmled"
-- #pwm-cells: should be 2. See pwm.yaml in this directory for a description of
-  the cells format.
-
-Example:
-
-twl_pwmled: pwmled {
-	compatible = "ti,twl6030-pwmled";
-	#pwm-cells = <2>;
-};

Signature · 1 line

2.39.5