On Tue, Jan 31, 2012 at 8:54 AM, Tobias Klauser <tklau...@distanz.ch> wrote:
> From: Frederic Lambert <frdr...@gmail.com>
>
> Until now we let the code in spi.c assign us the bus number if the platform
> device didn't specify its id. This patch adds the possibility to explicitely
> specify the bus number via device tree.
>
> Signed-off-by: Frederic Lambert <frdr...@gmail.com>
> Signed-off-by: Tobias Klauser <tklau...@distanz.ch>
> ---
> diff --git a/drivers/spi/spi-altera.c b/drivers/spi/spi-altera.c
> index 4813a63..d5bf52b 100644
> --- a/drivers/spi/spi-altera.c
> +++ b/drivers/spi/spi-altera.c
> @@ -226,6 +226,15 @@ static int __devinit altera_spi_probe(struct
> platform_device *pdev)
> if (!master)
> return err;
>
> + /* bus_num is dynamically assigned when undefined (see spi.c) */
> + /* look for a DTS entry to override this */
> + if (pdev->id == -1 && pdev->dev.of_node != 0) {
> + u32 tmp;
> +
> + if (of_property_read_u32(pdev->dev.of_node, "bus-number",
> &tmp) == 0)
> + pdev->id = tmp;
BTW, it is absolutely illegal for device drivers to modify the
pdev->id field. Once a device is registered, the id and name cannot
be changed.
g.
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