diff mbox series

[v2,12/17] dt-bindings: pwm: add microchip corePWM binding

Message ID 20211217093325.30612-13-conor.dooley@microchip.com (mailing list archive)
State Superseded
Headers show
Series Update the Icicle Kit device tree | expand

Commit Message

Conor Dooley Dec. 17, 2021, 9:33 a.m. UTC
From: Conor Dooley <conor.dooley@microchip.com>

Add device tree bindings for the Microchip fpga fabric based "core" PWM controller.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
---
 .../bindings/pwm/microchip,corepwm.yaml       | 61 +++++++++++++++++++
 1 file changed, 61 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml

Comments

Rob Herring (Arm) Dec. 17, 2021, 2:21 p.m. UTC | #1
On Fri, 17 Dec 2021 09:33:20 +0000, conor.dooley@microchip.com wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> Add device tree bindings for the Microchip fpga fabric based "core" PWM controller.
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  .../bindings/pwm/microchip,corepwm.yaml       | 61 +++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
Documentation/devicetree/bindings/pwm/microchip,corepwm.example.dts:19:18: fatal error: dt-bindings/clock/microchip,mpfs-clock.h: No such file or directory
   19 |         #include "dt-bindings/clock/microchip,mpfs-clock.h"
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.lib:373: Documentation/devicetree/bindings/pwm/microchip,corepwm.example.dt.yaml] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1413: dt_binding_check] Error 2

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1569853

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.
Krzysztof Kozlowski Dec. 17, 2021, 2:58 p.m. UTC | #2
On 17/12/2021 10:33, conor.dooley@microchip.com wrote:
> From: Conor Dooley <conor.dooley@microchip.com>
> 
> Add device tree bindings for the Microchip fpga fabric based "core" PWM controller.
> 
> Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
> ---
>  .../bindings/pwm/microchip,corepwm.yaml       | 61 +++++++++++++++++++
>  1 file changed, 61 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml b/Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml
> new file mode 100644
> index 000000000000..ed7d0351adc9
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml
> @@ -0,0 +1,61 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/microchip,corepwm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Microchip ip core PWM controller bindings
> +
> +maintainers:
> +  - Conor Dooley <conor.dooley@microchip.com>
> +
> +description: |
> +  corePWM is an 16 channel pulse width modulator FPGA IP
> +
> +  https://www.microsemi.com/existing-parts/parts/152118
> +
> +properties:
> +  compatible:
> +    items:
> +      - const: microchip,corepwm
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  "#pwm-cells":
> +    const: 2
> +
> +  microchip,sync-update:
> +    description: |
> +      In synchronous mode, all channels are updated at the beginning of the PWM period.
> +      Asynchronous mode is relevant to applications such as LED control, where
> +      synchronous updates are not required. Asynchronous mode lowers the area size,
> +      reducing shadow register requirements. This can be set at run time, provided
> +      SHADOW_REG_EN is asserted. SHADOW_REG_EN is set by the FPGA bitstream programmed
> +      to the device.

Please also describe what is the meaning of the values used here. What
does a value "2" mean?

> +
> +    $ref: /schemas/types.yaml#/definitions/uint8
> +    default: 0
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - "#pwm-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include "dt-bindings/clock/microchip,mpfs-clock.h"
> +    corePWN1: corePWM@41000000 {

Here and in all patches, please skip the label. It's not helping.

Node name: pwm

> +      compatible = "microchip,corepwm";
> +      microchip,sync-update = /bits/ 8 <1>;
> +      clocks = <&clkcfg CLK_FIC3>;
> +      reg = <0x41000000 0xF0>;
> +      #pwm-cells = <2>;
> +    };
> 


Best regards,
Krzysztof
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml b/Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml
new file mode 100644
index 000000000000..ed7d0351adc9
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/microchip,corepwm.yaml
@@ -0,0 +1,61 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pwm/microchip,corepwm.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip ip core PWM controller bindings
+
+maintainers:
+  - Conor Dooley <conor.dooley@microchip.com>
+
+description: |
+  corePWM is an 16 channel pulse width modulator FPGA IP
+
+  https://www.microsemi.com/existing-parts/parts/152118
+
+properties:
+  compatible:
+    items:
+      - const: microchip,corepwm
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  "#pwm-cells":
+    const: 2
+
+  microchip,sync-update:
+    description: |
+      In synchronous mode, all channels are updated at the beginning of the PWM period.
+      Asynchronous mode is relevant to applications such as LED control, where
+      synchronous updates are not required. Asynchronous mode lowers the area size,
+      reducing shadow register requirements. This can be set at run time, provided
+      SHADOW_REG_EN is asserted. SHADOW_REG_EN is set by the FPGA bitstream programmed
+      to the device.
+
+    $ref: /schemas/types.yaml#/definitions/uint8
+    default: 0
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - "#pwm-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include "dt-bindings/clock/microchip,mpfs-clock.h"
+    corePWN1: corePWM@41000000 {
+      compatible = "microchip,corepwm";
+      microchip,sync-update = /bits/ 8 <1>;
+      clocks = <&clkcfg CLK_FIC3>;
+      reg = <0x41000000 0xF0>;
+      #pwm-cells = <2>;
+    };