From: Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
To: "linux-mtd@lists.infradead.org" <linux-mtd@lists.infradead.org>,
"boris.brezillon@bootlin.com" <boris.brezillon@bootlin.com>,
"marek.vasut@gmail.com" <marek.vasut@gmail.com>,
"vigneshr@ti.com" <vigneshr@ti.com>,
"linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Cc: "robh@kernel.org" <robh@kernel.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"computersforpeace@gmail.com" <computersforpeace@gmail.com>,
"frieder.schrempf@exceet.de" <frieder.schrempf@exceet.de>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
Subject: [PATCH v2 1/7] spi: add support for octal I/O data transfer
Date: Mon, 15 Oct 2018 11:48:01 +0000 [thread overview]
Message-ID: <1539603969-21076-2-git-send-email-yogeshnarayan.gaur@nxp.com> (raw)
In-Reply-To: <1539603969-21076-1-git-send-email-yogeshnarayan.gaur@nxp.com>
Add flags for Octal 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 Gaur <yogeshnarayan.gaur@nxp.com>
---
Changes for v2:
Incorporated review comments of Boris.
drivers/spi/spi.c | 6 ++++++
include/linux/spi/spi.h | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index ec395a6..80f672f 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_OCTAL;
+ 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_OCTAL;
+ break;
default:
dev_warn(&ctlr->dev,
"spi-rx-bus-width %d not supported\n",
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index a64235e..2d21307 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_OCTAL 0x1000 /* transmit with 8 wires */
+#define SPI_RX_OCTAL 0x2000 /* receive with 8 wires */
int irq;
void *controller_state;
void *controller_data;
--
2.7.4
next prev parent reply other threads:[~2018-10-15 11:48 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-15 11:47 [PATCH v2 0/7] spi: add support for octal mode Yogesh Narayan Gaur
2018-10-15 11:48 ` Yogesh Narayan Gaur [this message]
2018-10-15 11:48 ` [PATCH v2 2/7] mtd: spi-nor: add opcodes for octal Read/Write commands Yogesh Narayan Gaur
2018-10-15 11:48 ` [PATCH v2 3/7] mtd: spi-nor: add octal read flag for flash mt35xu512aba Yogesh Narayan Gaur
2018-10-15 11:48 ` [PATCH v2 4/7] mtd: m25p80: add support of octal I/O transfer Yogesh Narayan Gaur
2018-10-15 11:48 ` [PATCH v2 5/7] spi: spi-mem: add support for octal I/O data transfer Yogesh Narayan Gaur
2018-10-15 11:48 ` [PATCH v2 6/7] spi: nxp-fspi: add mode flag bit for octal support Yogesh Narayan Gaur
2018-10-15 11:48 ` [PATCH v2 7/7] arm64: dts: lx2160a: update fspi node Yogesh Narayan Gaur
2018-10-15 11:54 ` [PATCH v2 0/7] spi: add support for octal mode Boris Brezillon
2018-10-15 11:58 ` Yogesh Narayan Gaur
2018-10-15 12:13 Yogesh Narayan Gaur
2018-10-15 12:14 ` [PATCH v2 1/7] spi: add support for octal I/O data transfer Yogesh Narayan Gaur
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