[PATCH] [POWERPC] Xilinx: hwicap driver

[Grant Likely]

On 2/1/08, Stephen Neuendorffer <stephen.neuendorffer at xilinx.com> wrote:
> This includes code for new fifo-based xps_hwicap in addition to the
> older opb_hwicap, which has a significantly different interface.  The
> common code between the two drivers is largely shared.
>
> Significant differences exists between this driver and what is
> supported in the EDK drivers.  In particular, most of the
> architecture-specific code for reconfiguring individual FPGA resources
> has been removed.  This functionality is likely better provided in a
> user-space support library.  In addition, read and write access is
> supported.  In addition, although the xps_hwicap cores support
> interrupt-driver mode, this driver only supports polled operation, in
> order to make the code simpler, and since the interrupt processing
> overhead is likely to slow down the throughput under Linux.
>
> Signed-off-by: Stephen Neuendorffer <stephen.neuendorffer at xilinx.com>
>
> Fixed to add mutexes, and a few style issues.

Inconsistent indentation (tabs vs. spaces) in some places.  Otherwise:

Acked-by: Grant Likely <grant.likely at secretlab.ca>

g.

> +static int __devexit hwicap_remove(struct device *dev)
> +{
> +       struct hwicap_drvdata *drvdata;
> +
> +       drvdata = (struct hwicap_drvdata *)dev_get_drvdata(dev);
> +
> +       if (!drvdata)
> +            return 0;
> +
> +        class_device_destroy(icap_class, drvdata->devt);
> +        cdev_del(&drvdata->cdev);
> +        iounmap(drvdata->base_address);
> +        release_mem_region(drvdata->mem_start, drvdata->mem_size);
> +        kfree(drvdata);
> +        dev_set_drvdata(dev, NULL);
> +        probed_devices[MINOR(dev->devt)-xhwicap_minor] = 0;
> +
> +       return 0;               /* success */
> +}

Here in particular


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