On 17/12/2021 10:33, conor.dooley@xxxxxxxxxxxxx wrote: > From: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> > > Add device tree bindings for the Microchip fpga fabric based "core" PWM controller. > > Signed-off-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx> > --- > .../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@xxxxxxxxxxxxx> > + > +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
