[RFC PATCH 2/8] dt-bindings: mailbox: Add bindings for RPMI shared memory transport

Leyfoon Tan leyfoon.tan at starfivetech.com
Mon Dec 23 18:19:57 PST 2024



> -----Original Message-----
> From: Anup Patel <apatel at ventanamicro.com>
> Sent: Monday, December 16, 2024 4:48 PM
> To: Michael Turquette <mturquette at baylibre.com>; Stephen Boyd
> <sboyd at kernel.org>; Rob Herring <robh at kernel.org>; Krzysztof Kozlowski
> <krzk+dt at kernel.org>; Conor Dooley <conor+dt at kernel.org>; Jassi Brar
> <jassisinghbrar at gmail.com>
> Cc: Palmer Dabbelt <palmer at dabbelt.com>; Paul Walmsley
> <paul.walmsley at sifive.com>; Sunil V L <sunilvl at ventanamicro.com>; Rahul
> Pathak <rpathak at ventanamicro.com>; Leyfoon Tan
> <leyfoon.tan at starfivetech.com>; Atish Patra <atishp at atishpatra.org>;
> Andrew Jones <ajones at ventanamicro.com>; Anup Patel
> <anup at brainfault.org>; linux-clk at vger.kernel.org;
> devicetree at vger.kernel.org; linux-riscv at lists.infradead.org; linux-
> kernel at vger.kernel.org; Anup Patel <apatel at ventanamicro.com>
> Subject: [RFC PATCH 2/8] dt-bindings: mailbox: Add bindings for RPMI shared
> memory transport
> 
[...]

> +
> +examples:
> +  - |
> +    // Example 1 (RPMI shared memory with only 2 queues):
> +    mailbox at 10080000 {
> +        compatible = "riscv,rpmi-shmem-mbox";
> +        reg = <0x00 0x10080000 0x00 0x10000>,
> +              <0x00 0x10090000 0x00 0x10000>,
> +              <0x00 0x100a0000 0x00 0x4>;
> +        reg-names = "a2p-req", "p2a-ack", "db-reg";
> +        msi-parent = <&imsic_mlevel>;
> +        riscv,slot-size = <64>;
> +        #mbox-cells = <1>;
> +    };
> +  - |
> +    // Example 2 (RPMI shared memory with only 4 queues):
> +    mailbox at 10001000 {
> +        compatible = "riscv,rpmi-shmem-mbox";
> +        reg = <0x00 0x10001000 0x00 0x800>,
> +              <0x00 0x10001800 0x00 0x800>,
> +              <0x00 0x10002000 0x00 0x800>,
> +              <0x00 0x10002800 0x00 0x800>,
> +              <0x00 0x10003000 0x00 0x4>;
> +        reg-names = "a2p-req", "p2a-ack", "db-reg";

reg has 5 entries, missing 2 reg-names?

> +        msi-parent = <&imsic_mlevel>;
> +        riscv,slot-size = <64>;
> +        riscv,db-mask = <0x00008000>;
> +        riscv,db-value = <0x00008000>;
> +        #mbox-cells = <1>;
> +    };
> --
> 2.43.0

Regards
Ley Foon



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