From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yogesh Narayan Gaur Subject: [PATCH v3 2/7] spi: spi-mem: add support for octo mode I/O data transfer Date: Tue, 23 Oct 2018 09:37:13 +0000 Message-ID: <1540287311-1572-3-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1540287311-1572-1-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" , "broonie@kernel.org" , "marek.vasut@gmail.com" , "vigneshr@ti.com" , "linux-spi@vger.kernel.org" , "devicetree@vger.kernel.org" Return-path: In-Reply-To: <1540287311-1572-1-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 support for octo mode I/O data transfer in spi-mem framework. Signed-off-by: Yogesh Gaur --- Changes for v3: - Modified string 'octal' with 'octo'. Changes for v2: - Patch added in v2 version. drivers/spi/spi-mem.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index c6bdea7..2379efc 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -12,7 +12,7 @@ =20 #include "internals.h" =20 -#define SPI_MEM_MAX_BUSWIDTH 4 +#define SPI_MEM_MAX_BUSWIDTH 8 =20 /** * spi_controller_dma_map_mem_op_data() - DMA-map the buffer attached to a @@ -121,6 +121,13 @@ static int spi_check_buswidth_req(struct spi_mem *mem,= u8 buswidth, bool tx) =20 break; =20 + case 8: + if ((tx && (mode & SPI_TX_OCTO)) || + (!tx && (mode & SPI_RX_OCTO))) + return 0; + + break; + default: break; } --=20 2.7.4