On Tue, Jun 18, 2024 at 11:12:33PM +0800, Yuntao Dai wrote: > Add devicetree bindings documentation for Sophgo cv18x SoCs mailbox > > Signed-off-by: Yuntao Dai <d1581209858@xxxxxxxx> > --- > .../mailbox/sophgo,cv1800b-mailbox.yaml | 75 +++++++++++++++++++ > 1 file changed, 75 insertions(+) > create mode 100644 Documentation/devicetree/bindings/mailbox/sophgo,cv1800b-mailbox.yaml > > diff --git a/Documentation/devicetree/bindings/mailbox/sophgo,cv1800b-mailbox.yaml b/Documentation/devicetree/bindings/mailbox/sophgo,cv1800b-mailbox.yaml > new file mode 100644 > index 000000000..e1868aaf2 > --- /dev/null > +++ b/Documentation/devicetree/bindings/mailbox/sophgo,cv1800b-mailbox.yaml > @@ -0,0 +1,75 @@ > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/mailbox/sophgo,cv1800b-mailbox.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Sophgo cv1800b mailbox controller > + > +maintainers: > + - Yuntao Dai <d1581209858@xxxxxxxx> > + > +description: > + The Sophgo cv18x SoCs mailbox has 8 channels and 8 bytes per channel for > + different processors. Any processer can write data in a channel, and > + set co-responding register to raise interrupt to notice another processor, > + and it is allowed to send data to itself. > + Sophgo cv18x SoCs has 3 processors and numbered as > + <1> C906L > + <2> C906B > + <3> 8051 > + > +properties: > + compatible: > + enum: > + - sophgo,cv1800b-mailbox > + > + reg: > + maxItems: 1 > + > + interrupts: > + maxItems: 1 > + > + interrupt-names: > + const: mailbox > + > + recvid: > + maxItems: 1 > + description: > + This cell indicates the mailbox controller is running on which processor You can just look up your hartid at runtime, wouldn't that be sufficient? > + > + sendto: > + maxItems: 1 > + description: > + This cell indicates the message sends to which processor Can't this go into an mbox cell? Having this property would limit the mailbox to only communicating with 1 of the 2 available processors. Cheers, Conor. > + > + > + "#mbox-cells": > + const: 1 > + description: > + This cell indicates which channel is used > + > +required: > + - compatible > + - reg > + - interrupts > + - recvid > + - sendto > + - "#mbox-cells" > + > +additionalProperties: false > + > +examples: > + - | > + #include <dt-bindings/interrupt-controller/irq.h> > + > + mailbox: mailbox@1900000 { > + compatible = "sophgo,cv1800b-mailbox"; > + reg = <0x01900000 0x1000>; > + interrupts = <101 IRQ_TYPE_LEVEL_HIGH>; > + interrupt-names = "mailbox"; > + interrupt-parent = <&plic>; > + recvid = <1>; > + sendto = <2>; > + #mbox-cells = <1>; > + }; > -- > 2.17.1 >
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