linux-kernel - Re: [PATCH 1/5 v3] Add the explanation and a sample of RapidIO OF node to the document of booting-without-of.txt file.

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Message-Id: <98CA70A1-9888-4508-A0E9-0EB28C14945F@kernel.crashing.org>
Date:	Fri, 27 Jul 2007 03:51:54 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Zhang Wei <wei.zhang@...escale.com>
Cc:	mporter@...nel.crashing.org, paulus@...ba.org,
	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org
Subject: Re: [PATCH 1/5 v3] Add the explanation and a sample of RapidIO OF node to the document of booting-without-of.txt file.


On Jul 26, 2007, at 3:42 AM, Zhang Wei wrote:

> Add the explanation and a sample of RapidIO OF node to the document  
> of booting-without-of.txt file.
>
> Signed-off-by: Zhang Wei <wei.zhang@...escale.com>
> ---
>  Documentation/powerpc/booting-without-of.txt |   37 +++++++++++++++ 
> +++++++++++
>  1 files changed, 37 insertions(+), 0 deletions(-)
>
> diff --git a/Documentation/powerpc/booting-without-of.txt b/ 
> Documentation/powerpc/booting-without-of.txt
> index 76733a3..d89b805 100644
> --- a/Documentation/powerpc/booting-without-of.txt
> +++ b/Documentation/powerpc/booting-without-of.txt
> @@ -1824,6 +1824,43 @@ platforms are moved over to use the  
> flattened-device-tree model.
>  		fsl,has-rstcr;
>  	};
>
> +   l) RapidIO
> +
> +   RapidIO is a definition of a system interconnect. This node add
> +   the support for RapidIO processor in kernel. The node name is
> +   suggested to be 'rapidio'.
> +
> +   Required properties:
> +
> +    - compatible : Using "fsl,rapidio-delta" for Freescale PowerPC
> +      RapidIO controller.
> +    - #address-cells : Address representation for "rapidio" devices.
> +      This field represents the number of cells needed to represent
> +      the RapidIO address of the registers.

Can you explain this a little further.  I'm a bit confused by  
'RapidIO address of the registers'.

> +      See 1) above for more details on defining #address-cells.
> +    - reg : Offset and length of the register set for the device
> +    - ranges : Should be defined as specified in 1) to describe the
> +      translation of addresses for memory mapped RapidIO memory
> +      space.
> +    - interrupts : binding interrupts for this device node,
> +      please follow below orders:
> +      <err_irq bell_outb_irq bell_inb_irq msg1_tx_irq msg1_rx_irq
> +      msg2_tx_irq msg2_rx_irq ... msgN_tx_irq msgN_rx_irq>.
> +
> +  Example:
> +
> +	rapidio@...00 {
> +		compatible = "fsl,rapidio-delta";
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		reg = <c0000 20000>;
> +		ranges = <0 0 c0000000 20000000>;
> +		interrupt-parent = <&mpic>;
> +		/* err_irq bell_outb_irq bell_inb_irq msg1_tx_irq msg1_rx_irq
> +						      msg2_tx_irq msg2_rx_irq */
> +		interrupts = <30 2 31 2 32 2 35 2 36 2 37 2 38 2>;
> +	};
> +
>     More devices will be defined as this spec matures.
>
>  VII - Specifying interrupt information for devices
> -- 
> 1.5.1

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