From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Likely Subject: Re: [PATCH resend] spi: Add support for specifying 3-wire mode via device tree Date: Fri, 07 Dec 2012 13:14:05 +0000 Message-ID: <20121207131405.EBFDE3E0B87@localhost> References: <1354809333-18364-1-git-send-email-lars@metafoo.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1354809333-18364-1-git-send-email-lars-Qo5EllUWu/uELgA04lAiVw@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Sender: "devicetree-discuss" Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, Lars-Peter Clausen , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Rob Herring List-Id: devicetree@vger.kernel.org On Thu, 6 Dec 2012 16:55:33 +0100, Lars-Peter Clausen 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 > Acked-by: Rob Herring 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.