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From:   David Lechner <david@lechnology.com>
To:     linux-spi@vger.kernel.org, linux-iio@vger.kernel.org
Cc:     David Lechner <david@lechnology.com>,
        Jonathan Cameron <jic23@kernel.org>,
        Hartmut Knaack <knaack.h@gmx.de>,
        Lars-Peter Clausen <lars@metafoo.de>,
        Peter Meerwald-Stadler <pmeerw@pmeerw.net>,
        Mark Brown <broonie@kernel.org>, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/4] spi: add new SPI_CS_WORD flag
Date:   Wed, 12 Sep 2018 19:39:17 -0500
Message-Id: <20180913003920.30600-2-david@lechnology.com>
In-Reply-To: <20180913003920.30600-1-david@lechnology.com>
References: <20180913003920.30600-1-david@lechnology.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This adds a new SPI mode flag, SPI_CS_WORD, that is used to indicate
that a SPI device requires the chip select to be toggled after each
word that is transferred.

Signed-off-by: David Lechner <david@lechnology.com>
---
 include/linux/spi/spi.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index d698f9db3484..7bb36145e2ba 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -163,6 +163,7 @@ 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 */
 	int			irq;
 	void			*controller_state;
 	void			*controller_data;
@@ -177,7 +178,6 @@ struct spi_device {
 	 * the controller talks to each chip, like:
 	 *  - memory packing (12 bit samples into low bits, others zeroed)
 	 *  - priority
-	 *  - drop chipselect after each word
 	 *  - chipselect delays
 	 *  - ...
 	 */
-- 
2.17.1