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Wed, 19 Dec 2018 05:11:55 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=VSui6ivoM5C6JccmvtXmjCVSeKXWAV2JHslGhvYma9Y=; b=p499q7Y0I19iwbTar2bvsp2uSNKZy3msLz5TfqSBbzcsA/XYX/AiuBLcoBKYX8kSVO5lgdUvFT1XSbBmeBz38DLyPRt5NeaCp5f9R00iu382RjouoJDN3nYJw79wT8Jf8AQBtDLug1vOZc/kKoyO7RWiazQfOMf6bx39+cBzWQo= Received: from VI1PR04MB5726.eurprd04.prod.outlook.com (20.178.127.24) by VI1PR04MB6096.eurprd04.prod.outlook.com (20.179.25.150) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1446.19; Wed, 19 Dec 2018 10:11:49 +0000 Received: from VI1PR04MB5726.eurprd04.prod.outlook.com ([fe80::d938:811:ed7:175]) by VI1PR04MB5726.eurprd04.prod.outlook.com ([fe80::d938:811:ed7:175%3]) with mapi id 15.20.1446.018; Wed, 19 Dec 2018 10:11:49 +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: "tudor.ambarus@microchip.com" , "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 v6 1/7] spi: add support for octal mode I/O data transfer Thread-Topic: [PATCH v6 1/7] spi: add support for octal mode I/O data transfer Thread-Index: AQHUl4NBIWyUgOasmESGX5g9nVbhyg== Date: Wed, 19 Dec 2018 10:11:49 +0000 Message-ID: <1545214186-16987-2-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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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: W6SndUAHIFsHx7PaO5u1fYyF2qOsU66QV/sks2U4O/5Q1z8eldjyy6hxRYE14hYb9xNYUatsjnWkn76C7C3sh45SDMRh92Uc7cxTZFsGNfTMyI+bEM+YMTqfSVFIxdgr59mme2Xe+nWazs+lRdhSofdGetr3s0d7SDi/WMXG4z8NLW8upbHfmdz8XulUAiE5BwqyD90vDqSM3Kas1twcVZIhOjNIPJMmVSrrSeBFDYBs8Jq4xkCrFZj92UfSJViL8sipDVAZkwX8rFvMXwmDIgx4ch5//ZJISj9dX1DS0UZWeH1bQFXasV0rFtjaBwqG spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 6be46db4-8b3b-4e04-a209-08d6659a63b1 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 Dec 2018 10:11:49.6146 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB6096 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add flags for Octal 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_OCTAL: transmit with 8 wires SPI_RX_OCTAL: receive with 8 wires 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: - Rebase on top of v4.20-rc2 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 | 4 +++- 2 files changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 6ca5940..95249b8 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1617,6 +1617,9 @@ static int of_spi_parse_dt(struct spi_controller *ctl= r, struct spi_device *spi, case 4: spi->mode |=3D SPI_TX_QUAD; break; + case 8: + spi->mode |=3D SPI_TX_OCTAL; + break; default: dev_warn(&ctlr->dev, "spi-tx-bus-width %d not supported\n", @@ -1635,6 +1638,9 @@ static int of_spi_parse_dt(struct spi_controller *ctl= r, struct spi_device *spi, case 4: spi->mode |=3D SPI_RX_QUAD; break; + case 8: + spi->mode |=3D SPI_RX_OCTAL; + break; default: dev_warn(&ctlr->dev, "spi-rx-bus-width %d not supported\n", @@ -2823,7 +2829,8 @@ 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_OCTAL | + SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL))) return -EINVAL; /* help drivers fail *cleanly* when they need options * that aren't supported with their current controller @@ -2832,7 +2839,8 @@ int spi_setup(struct spi_device *spi) */ bad_bits =3D spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD); ugly_bits =3D bad_bits & - (SPI_TX_DUAL | SPI_TX_QUAD | SPI_RX_DUAL | SPI_RX_QUAD); + (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL | + SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL); 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 6be77fa..0c1ca5d 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -154,7 +154,9 @@ 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_CS_WORD 0x1000 /* toggle cs after each word */ +#define SPI_CS_WORD 0x1000 /* toggle cs after each word */ +#define SPI_TX_OCTAL 0x2000 /* transmit with 8 wires */ +#define SPI_RX_OCTAL 0x4000 /* receive with 8 wires */ int irq; void *controller_state; void *controller_data; --=20 2.7.4