From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yogesh Narayan Gaur Subject: [PATCH v2 1/7] spi: add support for octal I/O data transfer Date: Mon, 15 Oct 2018 11:48:01 +0000 Message-ID: <1539603969-21076-2-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1539603969-21076-1-git-send-email-yogeshnarayan.gaur@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Cc: "robh@kernel.org" , "mark.rutland@arm.com" , "shawnguo@kernel.org" , "linux-arm-kernel@lists.infradead.org" , "computersforpeace@gmail.com" , "frieder.schrempf@exceet.de" , "linux-kernel@vger.kernel.org" , Yogesh Narayan Gaur To: "linux-mtd@lists.infradead.org" , "boris.brezillon@bootlin.com" , "marek.vasut@gmail.com" , "vigneshr@ti.com" , "linux-spi@vger.kernel.org" , "devicetree@vger.kernel.org" Return-path: In-Reply-To: <1539603969-21076-1-git-send-email-yogeshnarayan.gaur@nxp.com> Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org Add flags for Octal I/O data transfer Required for the SPI controller which can do the data transfer (TX/RX) on 8 data lines e.g. NXP FlexSPI controller. SPI_TX_OCTAL: transmit with 8 wires SPI_RX_OCTAL: receive with 8 wires Signed-off-by: Yogesh Gaur --- Changes for v2: Incorporated review comments of Boris. drivers/spi/spi.c | 6 ++++++ include/linux/spi/spi.h | 2 ++ 2 files changed, 8 insertions(+) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ec395a6..80f672f 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1573,6 +1573,9 @@ static int of_spi_parse_dt(struct spi_controller *ctl= r, struct spi_device *spi, case 4: spi->mode |=3D SPI_TX_QUAD; break; + case 8: + spi->mode |=3D SPI_TX_OCTAL; + break; default: dev_warn(&ctlr->dev, "spi-tx-bus-width %d not supported\n", @@ -1591,6 +1594,9 @@ static int of_spi_parse_dt(struct spi_controller *ctl= r, struct spi_device *spi, case 4: spi->mode |=3D SPI_RX_QUAD; break; + case 8: + spi->mode |=3D SPI_RX_OCTAL; + break; default: dev_warn(&ctlr->dev, "spi-rx-bus-width %d not supported\n", diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index a64235e..2d21307 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -163,6 +163,8 @@ struct spi_device { #define SPI_TX_QUAD 0x200 /* transmit with 4 wires */ #define SPI_RX_DUAL 0x400 /* receive with 2 wires */ #define SPI_RX_QUAD 0x800 /* receive with 4 wires */ +#define SPI_TX_OCTAL 0x1000 /* transmit with 8 wires */ +#define SPI_RX_OCTAL 0x2000 /* receive with 8 wires */ int irq; void *controller_state; void *controller_data; --=20 2.7.4