From mboxrd@z Thu Jan 1 00:00:00 1970 From: yogeshnarayan.gaur@nxp.com (Yogesh Narayan Gaur) Date: Thu, 22 Nov 2018 05:14:37 +0000 Subject: [PATCH v4 2/7] spi: spi-mem: add support for octo mode I/O data transfer In-Reply-To: <1542863544-21257-1-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1542863544-21257-1-git-send-email-yogeshnarayan.gaur@nxp.com> Message-ID: <1542863544-21257-3-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 octo mode I/O data transfer in spi-mem framework. Signed-off-by: Yogesh Gaur Reviewed-by: Boris Brezillon --- Changes for v4: - None 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 62a7b80..388f849 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_OCTO)) || + (!tx && (mode & SPI_RX_OCTO))) + return 0; + + break; + default: break; } -- 2.7.4