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Thu, 22 Nov 2018 05:14:37 +0000 Received: from VI1PR04MB5726.eurprd04.prod.outlook.com ([fe80::595a:9890:8397:5d51]) by VI1PR04MB5726.eurprd04.prod.outlook.com ([fe80::595a:9890:8397:5d51%3]) with mapi id 15.20.1361.016; Thu, 22 Nov 2018 05:14:37 +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" 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 Subject: [PATCH v4 2/7] spi: spi-mem: add support for octo mode I/O data transfer Thread-Topic: [PATCH v4 2/7] spi: spi-mem: add support for octo mode I/O data transfer Thread-Index: AQHUgiJDzVTsDPXnB0mQxujUB5Eyqg== Date: Thu, 22 Nov 2018 05:14:37 +0000 Message-ID: <1542863544-21257-3-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1542863544-21257-1-git-send-email-yogeshnarayan.gaur@nxp.com> In-Reply-To: <1542863544-21257-1-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: SG2PR01CA0106.apcprd01.prod.exchangelabs.com (2603:1096:3:15::32) 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 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; }