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    SubjectRe: [PATCH 2/5] Add RapidIO sector to MPC8641HPCN board dts file.
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    Date
    On Tue, 2007-06-12 at 17:02 +0800, Zhang Wei wrote:
    > Add RapidIO sector to the MPC8641HPCN board dts file.
    >
    > Signed-off-by: Zhang Wei <wei.zhang@freescale.com>
    > ---
    > arch/powerpc/boot/dts/mpc8641_hpcn.dts | 13 +++++++++++++
    > 1 files changed, 13 insertions(+), 0 deletions(-)
    >
    > diff --git a/arch/powerpc/boot/dts/mpc8641_hpcn.dts b/arch/powerpc/boot/dts/mpc8641_hpcn.dts
    > index 04626b1..e2ce06e 100644
    > --- a/arch/powerpc/boot/dts/mpc8641_hpcn.dts
    > +++ b/arch/powerpc/boot/dts/mpc8641_hpcn.dts
    > @@ -329,6 +329,19 @@
    > >;
    > };
    >
    > + srio@c0000 {
    > + device_type = "rapidio";
    > + compatible = "fsl,rapidio-v1.0";
    > + #address-cells = <2>;
    > + reg = <c0000 20000>;
    > + ranges = <0 0 c0000000 20000000>;

    Don't understand the range setup... The code uses c0000000 as the start
    and 20000000 as the size for the rapidio law. So whats the 0 0 for?
    At first I thought address-cells 2 means that the range numbers are
    pairs expressing 64-bit numbers, eg start 0 0, size c0000000 20000000
    but thats not right...

    Sorry if I'm asking stupid questions....

    And thanks for the patch, just what I need.

    BTW do you have any notes/documentation on the space allocation routines
    intended use. I'm trying to work it out but I don't see any actual users
    of it yet... I need something like it for my distributed DMA driver,
    hence the interest.

    Cheers
    Phil

    > + 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>;
    > + };
    > +
    > mpic: pic@40000 {
    > clock-frequency = <0>;
    > interrupt-controller;


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