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SubjectRe: [PATCH resend] spi: Add support for specifying 3-wire mode via device tree
Date
On Thu,  6 Dec 2012 16:55:33 +0100, Lars-Peter Clausen <lars@metafoo.de> wrote:
> This patch allows to specify that a SPI device is connected in 3-wire mode via
> device tree.
>
> Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
> Acked-by: Rob Herring <rob.herring@calxeda.com>

Applied, thanks.

g.

> ---
> Documentation/devicetree/bindings/spi/spi-bus.txt | 2 ++
> drivers/spi/spi.c | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/spi/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt
> index 77a8b0d..296015e 100644
> --- a/Documentation/devicetree/bindings/spi/spi-bus.txt
> +++ b/Documentation/devicetree/bindings/spi/spi-bus.txt
> @@ -53,6 +53,8 @@ contain the following properties.
> shifted clock phase (CPHA) mode
> - spi-cs-high - (optional) Empty property indicating device requires
> chip select active high
> +- spi-3wire - (optional) Empty property indicating device requires
> + 3-wire mode.
>
> If a gpio chipselect is used for the SPI slave the gpio number will be passed
> via the cs_gpio
> diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
> index 22c71e2..cb61ada 100644
> --- a/drivers/spi/spi.c
> +++ b/drivers/spi/spi.c
> @@ -861,6 +861,8 @@ static void of_register_spi_devices(struct spi_master *master)
> spi->mode |= SPI_CPOL;
> if (of_find_property(nc, "spi-cs-high", NULL))
> spi->mode |= SPI_CS_HIGH;
> + if (of_find_property(nc, "spi-3wire", NULL))
> + spi->mode |= SPI_3WIRE;
>
> /* Device speed */
> prop = of_get_property(nc, "spi-max-frequency", &len);
> --
> 1.8.0
>

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


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