linux-kernel - [PATCH 09/12] spi: spi-fsl-dspi: Framesize control for XSPI mode

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Date:   Wed, 20 Jun 2018 09:34:39 +0200
From:   Esben Haabendal <esben.haabendal@...il.com>
To:     Mark Brown <broonie@...nel.org>, linux-spi@...r.kernel.org
Cc:     Kurt Kanzenbach <kurt@...utronix.de>,
        Angelo Dureghello <angelo@...am.it>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Sanchayan Maity <maitysanchayan@...il.com>,
        Yuan Yao <yao.yuan@....com>, linux-kernel@...r.kernel.org,
        Esben Haabendal <eha@...f.com>,
        Martin Hundebøll <martin@...nix.com>
Subject: [PATCH 09/12] spi: spi-fsl-dspi: Framesize control for XSPI mode

From: Esben Haabendal <eha@...f.com>

Signed-off-by: Esben Haabendal <eha@...f.com>
Cc: Martin Hundebøll <martin@...nix.com>
---
 drivers/spi/spi-fsl-dspi.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 3e9dd645ee54..ba83ff4512c9 100644
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -119,6 +119,9 @@
 #define SPI_FRAME_BITS_16	SPI_CTAR_FMSZ(0xf)
 #define SPI_FRAME_BITS_8	SPI_CTAR_FMSZ(0x7)
 
+#define SPI_FRAME_EBITS(bits)	SPI_CTARE_FMSZE(((bits) - 1) >> 4)
+#define SPI_FRAME_EBITS_MASK	SPI_CTARE_FMSZE(1)
+
 /* Register offsets for regmap_pushr */
 #define PUSHR_CMD		0x0
 #define PUSHR_TX		0x2
@@ -662,6 +665,10 @@ static int dspi_transfer_one_message(struct spi_master *master,
 		regmap_write(dspi->regmap, SPI_CTAR(0),
 			     dspi->cur_chip->ctar_val |
 			     SPI_FRAME_BITS(transfer->bits_per_word));
+		if (dspi->devtype_data->xspi_mode)
+			regmap_write(dspi->regmap, SPI_CTARE(0),
+				     SPI_FRAME_EBITS(transfer->bits_per_word)
+				     | SPI_CTARE_DTCP(1));
 
 		trans_mode = dspi->devtype_data->trans_mode;
 		switch (trans_mode) {
@@ -922,6 +929,9 @@ static void dspi_init(struct fsl_dspi *dspi)
 {
 	regmap_write(dspi->regmap, SPI_MCR, SPI_MCR_MASTER | SPI_MCR_PCSIS);
 	regmap_write(dspi->regmap, SPI_SR, SPI_SR_CLEAR);
+	if (dspi->devtype_data->xspi_mode)
+		regmap_write(dspi->regmap, SPI_CTARE(0),
+			     SPI_CTARE_FMSZE(0) | SPI_CTARE_DTCP(1));
 }
 
 static int dspi_probe(struct platform_device *pdev)
-- 
2.17.1