From mboxrd@z Thu Jan 1 00:00:00 1970 From: yogeshnarayan.gaur@nxp.com (Yogesh Narayan Gaur) Date: Mon, 15 Oct 2018 12:14:09 +0000 Subject: [PATCH v2 2/7] spi: spi-mem: add support for octal I/O data transfer In-Reply-To: <1539605534-22302-1-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1539605534-22302-1-git-send-email-yogeshnarayan.gaur@nxp.com> Message-ID: <1539605534-22302-3-git-send-email-yogeshnarayan.gaur@nxp.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add support for octal I/O data transfer in spi-mem framework. Signed-off-by: Yogesh Gaur --- 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..6fa95f8 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -12,7 +12,7 @@ #include "internals.h" -#define SPI_MEM_MAX_BUSWIDTH 4 +#define SPI_MEM_MAX_BUSWIDTH 8 /** * 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) break; + case 8: + if ((tx && (mode & SPI_TX_OCTAL)) || + (!tx && (mode & SPI_RX_OCTAL))) + return 0; + + break; + default: break; } -- 2.7.4