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Wed, 19 Dec 2018 10:11:55 +0000 From: 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" Subject: [PATCH v6 2/7] spi: spi-mem: add support for octal mode I/O data transfer Thread-Topic: [PATCH v6 2/7] spi: spi-mem: add support for octal mode I/O data transfer Thread-Index: AQHUl4NFOIKJ2LzzYEqWmI5FGNUKVg== Date: Wed, 19 Dec 2018 10:11:55 +0000 Message-ID: <1545214186-16987-3-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1545214186-16987-1-git-send-email-yogeshnarayan.gaur@nxp.com> In-Reply-To: <1545214186-16987-1-git-send-email-yogeshnarayan.gaur@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: SG2PR02CA0009.apcprd02.prod.outlook.com (2603:1096:3:17::21) To VI1PR04MB5726.eurprd04.prod.outlook.com (2603:10a6:803:e4::24) authentication-results: spf=none (sender IP is ) smtp.mailfrom=yogeshnarayan.gaur@nxp.com; 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Signed-off-by: Yogesh Narayan Gaur Reviewed-by: Boris Brezillon --- Changes for v6: - Correct S-o-b tag with full author name as 'Yogesh Narayan Gaur'. Changes for v5: - Modified string 'octo' with 'octal'. 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..5e15d62 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; }