[PATCH 11/12] mpc5121: Added MPC512x DMA driver.

[Grant Likely]

On Wed, May 6, 2009 at 2:15 PM, Wolfgang Denk <wd at denx.de> wrote:
> From: Piotr Ziecik <kosmo at semihalf.com>
>
> This patch adds initial version of MPC512x DMA driver.
> Only memory to memory transfers are currenly supported.
>
> Signed-off-by: Piotr Ziecik <kosmo at semihalf.com>
> Signed-off-by: Wolfgang Denk <wd at denx.de>
> Cc: Grant Likely <grant.likely at secretlab.ca>
> Cc: John Rigby <jcrigby at gmail.com>

Don't have time to review this in detail right now, but three quick comments:

>  drivers/dma/mpc512x_dma.c                    |  642 ++++++++++++++++++++++++++
>  drivers/dma/mpc512x_dma.h                    |  192 ++++++++

It looks to me like these two files should be merged.

> diff --git a/arch/powerpc/boot/dts/mpc5121ads.dts b/arch/powerpc/boot/dts/mpc5121ads.dts
> index c2d9de9..e7f0e09 100644
> --- a/arch/powerpc/boot/dts/mpc5121ads.dts
> +++ b/arch/powerpc/boot/dts/mpc5121ads.dts
> @@ -373,7 +373,7 @@
>                };
>
>                dma at 14000 {
> -                       compatible = "fsl,mpc5121-dma2";
> +                       compatible = "fsl,mpc512x-dma";

Nack.  Compatible values should not use wildcards.  Be specific.  And
be specific about what it is compatible to if another part implements
the same device.

>                        reg = <0x14000 0x1800>;
>                        interrupts = <65 0x8>;
>                        interrupt-parent = < &ipic >;
> diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c b/arch/powerpc/platforms/512x/mpc512x_shared.c
> index b776e45..135fd6b 100644
> --- a/arch/powerpc/platforms/512x/mpc512x_shared.c
> +++ b/arch/powerpc/platforms/512x/mpc512x_shared.c
> @@ -95,6 +95,7 @@ void __init mpc512x_init_i2c(void)
>  static struct of_device_id __initdata of_bus_ids[] = {
>        { .compatible = "fsl,mpc5121-immr", },
>        { .compatible = "fsl,mpc5121-localbus", },
> +       { .compatible = "fsl,mpc5121-dma", },

This doesn't look right either.  Shouldn't the dma device hang off the
IMMR node?

g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.