On Fri, Jun 14, 2019 at 2:15 AM <daniel.baluta@xxxxxxx> wrote: > > From: Daniel Baluta <daniel.baluta@xxxxxxx> > > DSP IPC is the layer that allows the Host CPU to communicate > with DSP firmware. > DSP is part of some i.MX8 boards (e.g i.MX8QM, i.MX8QXP) > > Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx> > --- > .../bindings/arm/freescale/fsl,dsp.yaml | 43 +++++++++++++++++++ bindings/dsp/... > 1 file changed, 43 insertions(+) > create mode 100644 Documentation/devicetree/bindings/arm/freescale/fsl,dsp.yaml > > diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,dsp.yaml b/Documentation/devicetree/bindings/arm/freescale/fsl,dsp.yaml > new file mode 100644 > index 000000000000..16d9df1d397b > --- /dev/null > +++ b/Documentation/devicetree/bindings/arm/freescale/fsl,dsp.yaml > @@ -0,0 +1,43 @@ > +# SPDX-License-Identifier: GPL-2.0 The preference is to dual license new bindings: GPL-2.0 OR BSD-2-Clause > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/arm/freescale/fsl,dsp.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: NXP i.MX IPC DSP driver This isn't a driver. > + > +maintainers: > + - Daniel Baluta <daniel.baluta@xxxxxxx> > + > +description: | > + IPC communication layer between Host CPU and DSP on NXP i.MX8 platforms > + > +properties: > + compatible: > + enum: > + - fsl,imx-dsp You can have a fallback, but it needs SoC specific compatible(s). > + > + mboxes: > + description: > + List of phandle of 2 MU channels for TXDB, 2 MU channels for RXDB > + (see mailbox/fsl,mu.txt) > + maxItems: 1 Should be 4? > + > + mbox-names > + description: > + Mailboxes names > + allOf: > + - $ref: "/schemas/types.yaml#/definitions/string" No need for this, '*-names' already has a defined type. > + - enum: [ "txdb0", "txdb1", "rxdb0", "rxdb1" ] Should be an 'items' list with 4 entries? > +required: > + - compatible > + - mboxes > + - mbox-names This seems incomplete. How does one boot the DSP? Load firmware? No resources that Linux has to manage. Shared memory? > + > +examples: > + - | > + dsp { > + compatbile = "fsl,imx-dsp"; > + mbox-names = "txdb0", "txdb1", "rxdb0", "rxdb1"; > + mboxes = <&lsio_mu13 2 0 &lsio_mu13 2 1 &lsio_mu13 3 0 &lsio_mu13 3 1>; mboxes = <&lsio_mu13 2 0>, <&lsio_mu13 2 1>, <&lsio_mu13 3 0>, <&lsio_mu13 3 1>; > + }; > -- > 2.17.1 >
