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Tue, 23 Oct 2018 09:37:06 +0000 Received: from VI1PR04MB1038.eurprd04.prod.outlook.com ([fe80::d887:3c96:479a:4123]) by VI1PR04MB1038.eurprd04.prod.outlook.com ([fe80::d887:3c96:479a:4123%3]) with mapi id 15.20.1228.032; Tue, 23 Oct 2018 09:37:06 +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 v3 1/7] spi: add support for octo mode I/O data transfer Thread-Topic: [PATCH v3 1/7] spi: add support for octo mode I/O data transfer Thread-Index: AQHUarP2kz0cLmXyWk6HoE2nhS/6Jw== Date: Tue, 23 Oct 2018 09:37:06 +0000 Message-ID: <1540287311-1572-2-git-send-email-yogeshnarayan.gaur@nxp.com> References: <1540287311-1572-1-git-send-email-yogeshnarayan.gaur@nxp.com> In-Reply-To: <1540287311-1572-1-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: SG2PR04CA0141.apcprd04.prod.outlook.com (2603:1096:3:16::25) To VI1PR04MB1038.eurprd04.prod.outlook.com (2a01:111:e400:5092::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=yogeshnarayan.gaur@nxp.com; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: VqLkTTcnen6duu2cN3dH785+6nDftu0XeZB0PZH7+juQtt6Z8ERq2MzqvS9Slfv0XdKQ89VdXL8YxqxK8QqwIA8lZDZSKUl/+shpIRLTFhiRHH7H7mgWYLl4uJdgVSu72kVyPN+ccL0dZb/rFthA/ZXvzAkA1uSH5RzEdGpsdv5rzB3td/7T2z8C3p4sZw0UanDIvnjWo5PxWGvfXZ6TNxZMyPYQnkpRa+wbh76dFCtu3SZdFSpvIcHxWHSTBm72OXXXZa4DUv/lmxqv7OuCGsP3CmUyIIuba+g22bVfh9M+bDjBohwrGcHhgFwD9dVhEkQfF6RBGSScOqoWJ1gEebtK8y6cODQSZMufiwx9PvI= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: d32094a2-f492-4104-b674-08d638cb1882 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Oct 2018 09:37:06.7205 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5022 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add flags for Octo mode I/O data transfer Required for the SPI controller which can do the data transfer (TX/RX) on 8 data lines e.g. NXP FlexSPI controller. SPI_TX_OCTO: transmit with 8 wires SPI_RX_OCTO: receive with 8 wires Signed-off-by: Yogesh Gaur Reviewed-by: Boris Brezillon --- Changes for v3: - Modified string 'octal' with 'octo'. - Add octo mode support in spi_setup(). Changes for v2: - Incorporated review comments of Boris. drivers/spi/spi.c | 12 ++++++++++-- include/linux/spi/spi.h | 2 ++ 2 files changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index ec395a6..6d57fa7 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1573,6 +1573,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi, case 4: spi->mode |= SPI_TX_QUAD; break; + case 8: + spi->mode |= SPI_TX_OCTO; + break; default: dev_warn(&ctlr->dev, "spi-tx-bus-width %d not supported\n", @@ -1591,6 +1594,9 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi, case 4: spi->mode |= SPI_RX_QUAD; break; + case 8: + spi->mode |= SPI_RX_OCTO; + break; default: dev_warn(&ctlr->dev, "spi-rx-bus-width %d not supported\n", @@ -2770,14 +2776,16 @@ int spi_setup(struct spi_device *spi) /* if it is SPI_3WIRE mode, DUAL and QUAD should be forbidden */ if ((spi->mode & SPI_3WIRE) && (spi->mode & - (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD))) + (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTO | + SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTO))) return -EINVAL; /* help drivers fail *cleanly* when they need options * that aren't supported with their current controller */ bad_bits = spi->mode & ~spi->controller->mode_bits; ugly_bits = bad_bits & - (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD); + (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTO | + SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTO); if (ugly_bits) { dev_warn(&spi->dev, "setup: ignoring unsupported mode bits %x\n", diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index a64235e..cea4e49 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -163,6 +163,8 @@ struct spi_device { #define SPI_TX_QUAD 0x200 /* transmit with 4 wires */ #define SPI_RX_DUAL 0x400 /* receive with 2 wires */ #define SPI_RX_QUAD 0x800 /* receive with 4 wires */ +#define SPI_TX_OCTO 0x1000 /* transmit with 8 wires */ +#define SPI_RX_OCTO 0x2000 /* receive with 8 wires */ int irq; void *controller_state; void *controller_data;