Grant, Rob,
Could you, guys, have a look at this, please? No new bindings are added,
so, it should be a matter of 5 minutes looking over the patch. Would be a
pity if because of these 5 minutes a new driver gets delayed until the new
kernel version.
Thanks
Guennadi
On Sat, 10 May 2014, Guennadi Liakhovetski wrote:
> The nbpfaxi dmaengine driver doesn't define any new bindings, it only
> uses standard dmaengine bindings and defines 3 flags for the 3rd parameter
> of the "dmas" property.
>
> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@xxxxxxxxx>
> ---
>
> v3: split out from v2, no changes otherwise
>
> Documentation/devicetree/bindings/dma/nbpfaxi.txt | 61 +++++++++++++++++++++++
> include/dt-bindings/dma/nbpfaxi.h | 20 ++++++++
> 2 files changed, 81 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/dma/nbpfaxi.txt
> create mode 100644 include/dt-bindings/dma/nbpfaxi.h
>
> diff --git a/Documentation/devicetree/bindings/dma/nbpfaxi.txt b/Documentation/devicetree/bindings/dma/nbpfaxi.txt
> new file mode 100644
> index 0000000..d5e2522
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/dma/nbpfaxi.txt
> @@ -0,0 +1,61 @@
> +* Renesas "Type-AXI" NBPFAXI* DMA controllers
> +
> +* DMA controller
> +
> +Required properties
> +
> +- compatible: must be one of
> + "renesas,nbpfaxi64dmac1b4"
> + "renesas,nbpfaxi64dmac1b8"
> + "renesas,nbpfaxi64dmac1b16"
> + "renesas,nbpfaxi64dmac4b4"
> + "renesas,nbpfaxi64dmac4b8"
> + "renesas,nbpfaxi64dmac4b16"
> + "renesas,nbpfaxi64dmac8b4"
> + "renesas,nbpfaxi64dmac8b8"
> + "renesas,nbpfaxi64dmac8b16"
> +- #dma-cells: must be 2: the first integer is a terminal number, to which this
> + slave is connected, the second one is flags. Flags is a bitmask
> + with the following bits defined:
> +
> +#define NBPF_SLAVE_RQ_HIGH 1
> +#define NBPF_SLAVE_RQ_LOW 2
> +#define NBPF_SLAVE_RQ_LEVEL 4
> +
> +Optional properties:
> +
> +You can use dma-channels and dma-requests as described in dma.txt, although they
> +won't be used, this information is derived from the compatibility string.
> +
> +Example:
> +
> + dma: dma-controller@48000000 {
> + compatible = "renesas,nbpfaxi64dmac8b4";
> + reg = <0x48000000 0x400>;
> + interrupts = <0 12 0x4
> + 0 13 0x4
> + 0 14 0x4
> + 0 15 0x4
> + 0 16 0x4
> + 0 17 0x4
> + 0 18 0x4
> + 0 19 0x4>;
> + #dma-cells = <2>;
> + dma-channels = <8>;
> + dma-requests = <8>;
> + };
> +
> +* DMA client
> +
> +Required properties:
> +
> +dmas and dma-names are required, as described in dma.txt.
> +
> +Example:
> +
> +#include <dt-bindings/dma/nbpfaxi.h>
> +
> +...
> + dmas = <&dma 0 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)
> + &dma 1 (NBPF_SLAVE_RQ_HIGH | NBPF_SLAVE_RQ_LEVEL)>;
> + dma-names = "rx", "tx";
> diff --git a/include/dt-bindings/dma/nbpfaxi.h b/include/dt-bindings/dma/nbpfaxi.h
> new file mode 100644
> index 0000000..c1a5b9e
> --- /dev/null
> +++ b/include/dt-bindings/dma/nbpfaxi.h
> @@ -0,0 +1,20 @@
> +/*
> + * Copyright (C) 2013-2014 Renesas Electronics Europe Ltd.
> + * Author: Guennadi Liakhovetski <g.liakhovetski@xxxxxx>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of version 2 of the GNU General Public License as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef DT_BINDINGS_NBPFAXI_H
> +#define DT_BINDINGS_NBPFAXI_H
> +
> +/**
> + * Use "#dma-cells = <2>;" with the second integer defining slave DMA flags:
> + */
> +#define NBPF_SLAVE_RQ_HIGH 1
> +#define NBPF_SLAVE_RQ_LOW 2
> +#define NBPF_SLAVE_RQ_LEVEL 4
> +
> +#endif
> --
> 2.0.0.rc0
>
>
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