On Sat, Nov 23, 2019 at 12:56:21AM +0100, Michael Walle wrote: > Signed-off-by: Michael Walle <michael@xxxxxxxx> > --- > .../bindings/clock/fsl,sai-clock.yaml | 48 +++++++++++++++++++ > 1 file changed, 48 insertions(+) > create mode 100644 Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml > > diff --git a/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml b/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml > new file mode 100644 > index 000000000000..7116c8bc24d3 > --- /dev/null > +++ b/Documentation/devicetree/bindings/clock/fsl,sai-clock.yaml > @@ -0,0 +1,48 @@ > +# SPDX-License-Identifier: GPL-2.0 Dual license new bindings please: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/bindings/clock/fsl,sai-clock.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Freescale SAI bitclock-as-a-clock binding > + > +maintainers: > + - Michael Walle <michael@xxxxxxxx> > + > +description: | > + It is possible to use the BCLK pin of a SAI module as a generic clock > + output. Some SoC are very constrained in their pin multiplexer > + configuration. Eg. pins can only be changed groups. For example, on the > + LS1028A SoC you can only enable SAIs in pairs. If you use only one SAI, > + the second pins are wasted. Using this binding it is possible to use the > + clock of the second SAI as a MCLK clock for an audio codec, for example. > + > + This is a composite of a gated clock and a divider clock. > + > +properties: > + compatible: > + const: fsl,vf610-sai-clock > + > + reg: > + maxItems: 1 > + > + clocks: > + maxItems: 1 > + > + '#clock-cells': > + const: 0 > + > +required: > + - compatible > + - reg > + - clocks > + - '#clock-cells' > + Add: additionalProperties: false > +examples: > + - | > + mclk: clock-mclk@f130080 { > + compatible = "fsl,vf610-sai-clock"; > + reg = <0x0 0xf130080 0x0 0x80>; Examples are built now and this will fail because the default #address-cells and #size-cells are 1. > + #clock-cells = <0>; > + clocks = <&parentclk>; > + }; > -- > 2.20.1 >
