[PATCH 2/4 V4] MSI support on 83xx/85xx/86xx board

Grant Likely grant.likely at secretlab.ca
Fri May 9 23:31:37 EST 2008

On Fri, May 9, 2008 at 3:03 AM, Jason Jin <Jason.jin at freescale.com> wrote:
> This MSI driver can be used on 83xx/85xx/86xx board.
> In this driver, virtual interrupt host and chip were
> setup. There are 256 MSI interrupts in this host, Every 32
> MSI interrupts cascaded to one IPIC/MPIC interrupt.
> The chip was treated as edge sensitive and some necessary
> functions were setup for this chip.
> Before using the MSI interrupt, PCI/PCIE device need to
> ask for a MSI interrupt in the 256 MSI interrupts. A 256bit
> bitmap show which MSI interrupt was used, reserve bit in
> the bitmap can be used to force the device use some designate
> MSI interrupt in the 256 MSI interrupts. Sometimes this is useful
> for testing the all the MSI interrupts. The msi-available-ranges
> property in the dts file was used for this purpose.
> Signed-off-by: Jason Jin <Jason.jin at freescale.com>
> ---
> Update to V4 version per the suggestion's from Michael Ellerman
> +static struct of_platform_driver fsl_of_msi_driver = {
> +       .name = "fsl-of-msi",
> +       .match_table = fsl_of_msi_ids,
> +       .probe = fsl_of_msi_probe,
> +};

nitpick: 'of' in 'fsl-of-msi' is redundant.  We *already* know that
this is an of_platform driver.  :-)


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

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