SPI devices and OF

[Vitaly Wool]

On 4/4/07, Sascha Hauer <s.hauer at pengutronix.de> wrote:
> Hi,
>
> I'm currently writing a driver for the mpc5200 spi controller (the
> dedicated one, not the PSC ones).
> The driver has the form of a of_platform_driver. My problem is that I
> don't know how to define the spi devices on the spi bus. My current
> approach is having something like this in the OF tree:
>
>
>         spi at f00 {
>                 device_type = "spi";
>                 compatible = "mpc5200b-spi\0mpc5200-spi";
>                 reg = <f00 20>;
>                 interrupts = <2 d 0 2 e 0>;
>                 interrupt-parent = <500>;
>                 mmc at 0 {
>                         device_type = "mmc_spi";
>                         compatible = "mmc_spi";
>                 };
>         };
>
> I can then parse the children in my spi driver with
>
>         while( (child = of_get_next_child(odev->node, child))) {
>                 struct spi_board_info info;
>
>                 info.max_speed_hz =
>                 info.bus_num =
>                 info.chip_select =
>                 ...
>                 spi_register_board_info(&info, 1);
>         }
>
> I think it will work this way but I found no way getting the
> platform_data for the spi devices.

I think that it's worth extending the current SPI core with OF
support. Maybe I'll manage to get to it :)
If you have something ready, please email to
spi-devel-general at lists.sourceforge.net.

Thanks,
   Vitaly