* [PATCH] dt-bindings: pwm: Convert TI PWM Subsystem to DT schema
@ 2026-08-11 9:22 Eduard Bostina
2026-08-11 17:48 ` Rob Herring
0 siblings, 1 reply; 3+ messages in thread
From: Eduard Bostina @ 2026-08-11 9:22 UTC (permalink / raw)
To: Conor Dooley, devicetree, Eduard Bostina, Krzysztof Kozlowski,
linux-kernel, linux-pwm, Rob Herring, Uwe Kleine-König
Cc: daniel.baluta, simona.toaca, goledhruva, m-chawdhry
Convert the Texas Instruments SoC PWM Subsystem bindings
to DT schema.
During the conversion, the following updates were made:
- 'counter' node was added to the allowed child nodes
list to resolve dtbs_check warnings. Some eqep nodes
use 'counter' instead of 'eqep'.
Signed-off-by: Eduard Bostina <egbostina@gmail.com>
---
.../devicetree/bindings/pwm/pwm-tipwmss.txt | 58 --------------
.../devicetree/bindings/pwm/ti,pwmss.yaml | 77 +++++++++++++++++++
2 files changed, 77 insertions(+), 58 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt
create mode 100644 Documentation/devicetree/bindings/pwm/ti,pwmss.yaml
diff --git a/Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt b/Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt
deleted file mode 100644
index 4633697fbda1..000000000000
--- a/Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt
+++ /dev/null
@@ -1,58 +0,0 @@
-TI SOC based PWM Subsystem
-
-Required properties:
-- compatible: Must be "ti,<soc>-pwmss".
- for am33xx - compatible = "ti,am33xx-pwmss";
- for am4372 - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss";
- for dra746 - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss"
-
-- reg: physical base address and size of the registers map.
-- address-cells: Specify the number of u32 entries needed in child nodes.
- Should set to 1.
-- size-cells: specify number of u32 entries needed to specify child nodes size
- in reg property. Should set to 1.
-- ranges: describes the address mapping of a memory-mapped bus. Should set to
- physical address map of child's base address, physical address within
- parent's address space and length of the address map. For am33xx,
- 3 set of child register maps present, ECAP register space, EQEP
- register space, EHRPWM register space.
-
-Also child nodes should also populated under PWMSS DT node.
-
-Example:
-epwmss0: epwmss@48300000 { /* PWMSS for am33xx */
- compatible = "ti,am33xx-pwmss";
- reg = <0x48300000 0x10>;
- ti,hwmods = "epwmss0";
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x48300100 0x48300100 0x80 /* ECAP */
- 0x48300180 0x48300180 0x80 /* EQEP */
- 0x48300200 0x48300200 0x80>; /* EHRPWM */
-
- /* child nodes go here */
-};
-
-epwmss0: epwmss@48300000 { /* PWMSS for am4372 */
- compatible = "ti,am4372-pwmss","ti,am33xx-pwmss"
- reg = <0x48300000 0x10>;
- ti,hwmods = "epwmss0";
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x48300100 0x48300100 0x80 /* ECAP */
- 0x48300180 0x48300180 0x80 /* EQEP */
- 0x48300200 0x48300200 0x80>; /* EHRPWM */
-
- /* child nodes go here */
-};
-
-epwmss0: epwmss@4843e000 { /* PWMSS for DRA7xx */
- compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";
- reg = <0x4843e000 0x30>;
- ti,hwmods = "epwmss0";
- #address-cells = <1>;
- #size-cells = <1>;
- ranges;
-
- /* child nodes go here */
-};
diff --git a/Documentation/devicetree/bindings/pwm/ti,pwmss.yaml b/Documentation/devicetree/bindings/pwm/ti,pwmss.yaml
new file mode 100644
index 000000000000..53f88139dcd4
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/ti,pwmss.yaml
@@ -0,0 +1,77 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/ti,pwmss.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments SoC PWM Subsystem
+
+maintainers:
+ - Eduard Bostina <egbostina@gmail.com>
+
+properties:
+ compatible:
+ oneOf:
+ - const: ti,am33xx-pwmss
+ - items:
+ - enum:
+ - ti,am4372-pwmss
+ - ti,dra746-pwmss
+ - const: ti,am33xx-pwmss
+
+ reg:
+ maxItems: 1
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 1
+
+ ranges: true
+
+patternProperties:
+ "^(ecap|eqep|pwm|counter)@[0-9a-f]+$":
+ type: object
+ description: Child nodes for ECAP, EQEP (counter), and EHRPWM
+
+required:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+ - ranges
+
+additionalProperties: false
+
+examples:
+ - |
+ pwm@48300000 { /* PWMSS for am33xx */
+ compatible = "ti,am33xx-pwmss";
+ reg = <0x48300000 0x10>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x48300100 0x48300100 0x80>, /* ECAP */
+ <0x48300180 0x48300180 0x80>, /* EQEP */
+ <0x48300200 0x48300200 0x80>; /* EHRPWM */
+ };
+
+ - |
+ pwm@48300000 { /* PWMSS for am4372 */
+ compatible = "ti,am4372-pwmss", "ti,am33xx-pwmss";
+ reg = <0x48300000 0x10>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges = <0x48300100 0x48300100 0x80>, /* ECAP */
+ <0x48300180 0x48300180 0x80>, /* EQEP */
+ <0x48300200 0x48300200 0x80>; /* EHRPWM */
+ };
+
+ - |
+ pwm@4843e000 { /* PWMSS for DRA7xx */
+ compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";
+ reg = <0x4843e000 0x30>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+ };
--
2.43.0
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] dt-bindings: pwm: Convert TI PWM Subsystem to DT schema
2026-08-11 9:22 [PATCH] dt-bindings: pwm: Convert TI PWM Subsystem to DT schema Eduard Bostina
@ 2026-08-11 17:48 ` Rob Herring
2026-08-11 22:58 ` Uwe Kleine-König
0 siblings, 1 reply; 3+ messages in thread
From: Rob Herring @ 2026-08-11 17:48 UTC (permalink / raw)
To: Eduard Bostina
Cc: Conor Dooley, devicetree, Krzysztof Kozlowski, linux-kernel,
linux-pwm, Uwe Kleine-König, daniel.baluta, simona.toaca,
goledhruva, m-chawdhry
On Tue, Aug 11, 2026 at 09:22:08AM +0000, Eduard Bostina wrote:
> Convert the Texas Instruments SoC PWM Subsystem bindings
> to DT schema.
>
> During the conversion, the following updates were made:
> - 'counter' node was added to the allowed child nodes
> list to resolve dtbs_check warnings. Some eqep nodes
> use 'counter' instead of 'eqep'.
>
> Signed-off-by: Eduard Bostina <egbostina@gmail.com>
> ---
> .../devicetree/bindings/pwm/pwm-tipwmss.txt | 58 --------------
> .../devicetree/bindings/pwm/ti,pwmss.yaml | 77 +++++++++++++++++++
> 2 files changed, 77 insertions(+), 58 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt
> create mode 100644 Documentation/devicetree/bindings/pwm/ti,pwmss.yaml
>
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt b/Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt
> deleted file mode 100644
> index 4633697fbda1..000000000000
> --- a/Documentation/devicetree/bindings/pwm/pwm-tipwmss.txt
> +++ /dev/null
> @@ -1,58 +0,0 @@
> -TI SOC based PWM Subsystem
> -
> -Required properties:
> -- compatible: Must be "ti,<soc>-pwmss".
> - for am33xx - compatible = "ti,am33xx-pwmss";
> - for am4372 - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss";
> - for dra746 - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss"
> -
> -- reg: physical base address and size of the registers map.
> -- address-cells: Specify the number of u32 entries needed in child nodes.
> - Should set to 1.
> -- size-cells: specify number of u32 entries needed to specify child nodes size
> - in reg property. Should set to 1.
> -- ranges: describes the address mapping of a memory-mapped bus. Should set to
> - physical address map of child's base address, physical address within
> - parent's address space and length of the address map. For am33xx,
> - 3 set of child register maps present, ECAP register space, EQEP
> - register space, EHRPWM register space.
> -
> -Also child nodes should also populated under PWMSS DT node.
> -
> -Example:
> -epwmss0: epwmss@48300000 { /* PWMSS for am33xx */
> - compatible = "ti,am33xx-pwmss";
> - reg = <0x48300000 0x10>;
> - ti,hwmods = "epwmss0";
> - #address-cells = <1>;
> - #size-cells = <1>;
> - ranges = <0x48300100 0x48300100 0x80 /* ECAP */
> - 0x48300180 0x48300180 0x80 /* EQEP */
> - 0x48300200 0x48300200 0x80>; /* EHRPWM */
> -
> - /* child nodes go here */
> -};
> -
> -epwmss0: epwmss@48300000 { /* PWMSS for am4372 */
> - compatible = "ti,am4372-pwmss","ti,am33xx-pwmss"
> - reg = <0x48300000 0x10>;
> - ti,hwmods = "epwmss0";
> - #address-cells = <1>;
> - #size-cells = <1>;
> - ranges = <0x48300100 0x48300100 0x80 /* ECAP */
> - 0x48300180 0x48300180 0x80 /* EQEP */
> - 0x48300200 0x48300200 0x80>; /* EHRPWM */
> -
> - /* child nodes go here */
> -};
> -
> -epwmss0: epwmss@4843e000 { /* PWMSS for DRA7xx */
> - compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";
> - reg = <0x4843e000 0x30>;
> - ti,hwmods = "epwmss0";
> - #address-cells = <1>;
> - #size-cells = <1>;
> - ranges;
> -
> - /* child nodes go here */
> -};
> diff --git a/Documentation/devicetree/bindings/pwm/ti,pwmss.yaml b/Documentation/devicetree/bindings/pwm/ti,pwmss.yaml
> new file mode 100644
> index 000000000000..53f88139dcd4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/ti,pwmss.yaml
> @@ -0,0 +1,77 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/ti,pwmss.yaml#
ti,am33xx-pwmss.yaml for the filename.
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Texas Instruments SoC PWM Subsystem
> +
> +maintainers:
> + - Eduard Bostina <egbostina@gmail.com>
> +
> +properties:
> + compatible:
> + oneOf:
> + - const: ti,am33xx-pwmss
> + - items:
> + - enum:
> + - ti,am4372-pwmss
> + - ti,dra746-pwmss
> + - const: ti,am33xx-pwmss
> +
> + reg:
> + maxItems: 1
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 1
> +
> + ranges: true
> +
> +patternProperties:
> + "^(ecap|eqep|pwm|counter)@[0-9a-f]+$":
> + type: object
> + description: Child nodes for ECAP, EQEP (counter), and EHRPWM
required:
- compatible
> +
> +required:
> + - compatible
> + - reg
> + - "#address-cells"
> + - "#size-cells"
> + - ranges
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + pwm@48300000 { /* PWMSS for am33xx */
> + compatible = "ti,am33xx-pwmss";
> + reg = <0x48300000 0x10>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0x48300100 0x48300100 0x80>, /* ECAP */
> + <0x48300180 0x48300180 0x80>, /* EQEP */
> + <0x48300200 0x48300200 0x80>; /* EHRPWM */
> + };
> +
> + - |
> + pwm@48300000 { /* PWMSS for am4372 */
> + compatible = "ti,am4372-pwmss", "ti,am33xx-pwmss";
> + reg = <0x48300000 0x10>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges = <0x48300100 0x48300100 0x80>, /* ECAP */
> + <0x48300180 0x48300180 0x80>, /* EQEP */
> + <0x48300200 0x48300200 0x80>; /* EHRPWM */
> + };
> +
> + - |
> + pwm@4843e000 { /* PWMSS for DRA7xx */
> + compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";
> + reg = <0x4843e000 0x30>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> + };
One example is enough.
Rob
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] dt-bindings: pwm: Convert TI PWM Subsystem to DT schema
2026-08-11 17:48 ` Rob Herring
@ 2026-08-11 22:58 ` Uwe Kleine-König
0 siblings, 0 replies; 3+ messages in thread
From: Uwe Kleine-König @ 2026-08-11 22:58 UTC (permalink / raw)
To: Rob Herring
Cc: Eduard Bostina, Conor Dooley, devicetree, Krzysztof Kozlowski,
linux-kernel, linux-pwm, daniel.baluta, simona.toaca, goledhruva,
m-chawdhry
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On Tue, Aug 11, 2026 at 12:48:08PM -0500, Rob Herring wrote:
> On Tue, Aug 11, 2026 at 09:22:08AM +0000, Eduard Bostina wrote:
> > +examples:
> > + - |
> > + pwm@48300000 { /* PWMSS for am33xx */
> > + compatible = "ti,am33xx-pwmss";
> > + reg = <0x48300000 0x10>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0x48300100 0x48300100 0x80>, /* ECAP */
> > + <0x48300180 0x48300180 0x80>, /* EQEP */
> > + <0x48300200 0x48300200 0x80>; /* EHRPWM */
> > + };
> > +
> > + - |
> > + pwm@48300000 { /* PWMSS for am4372 */
> > + compatible = "ti,am4372-pwmss", "ti,am33xx-pwmss";
> > + reg = <0x48300000 0x10>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0x48300100 0x48300100 0x80>, /* ECAP */
> > + <0x48300180 0x48300180 0x80>, /* EQEP */
> > + <0x48300200 0x48300200 0x80>; /* EHRPWM */
> > + };
> > +
> > + - |
> > + pwm@4843e000 { /* PWMSS for DRA7xx */
> > + compatible = "ti,dra746-pwmss", "ti,am33xx-pwmss";
> > + reg = <0x4843e000 0x30>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges;
> > + };
>
> One example is enough.
Also it would be nice if that one example included the actual PWM.
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^ permalink raw reply [flat|nested] 3+ messages in thread
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2026-08-11 9:22 [PATCH] dt-bindings: pwm: Convert TI PWM Subsystem to DT schema Eduard Bostina
2026-08-11 17:48 ` Rob Herring
2026-08-11 22:58 ` Uwe Kleine-König
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