Re: [PATCH 3/3] spi: psdev: add passive serial driver

[Mark Rutland <mark.rutland@arm.com>]

On Wed, Mar 12, 2014 at 03:53:37PM +0000, Michael Grzeschik wrote:
> This patch introduces the psdev driver. It is used to communicate to an
> Altera passive serial connected FPGA by writing into an character
> device.
> 
> It simply initates the protocol on open and clocks the data into the
> FPGA by using the underlying SPI bus on write. The used SPI bus can also
> be an bitbang SPI bus. On close it will check for the response of the
> FPGA and tells if the write process was successful.
> 
> Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
> ---
>  drivers/spi/Kconfig    |   9 +
>  drivers/spi/Makefile   |   1 +
>  drivers/spi/spipsdev.c | 520 +++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 530 insertions(+)
>  create mode 100644 drivers/spi/spipsdev.c

[...]

> +static const struct of_device_id psdev_dt_ids[] = {
> +       { .compatible = "altr,passive-serial" },
> +       {},
> +};

There should be a binding document for this as part of the series.

Thanks,
Mark.