linux-kernel - [PATCH] spi: spi-ti-qspi: clear wlen field while setting word length.

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Message-Id: <1468094753-8327-1-git-send-email-prahlad.eee@gmail.com>
Date:	Sun, 10 Jul 2016 01:35:53 +0530
From:	Prahlad V <prahlad.eee@...il.com>
To:	broonie@...nel.org
Cc:	linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org,
	vigneshr@...com, Prahlad V <prahlad.eee@...il.com>
Subject: [PATCH] spi: spi-ti-qspi: clear wlen field while setting word length.

When a word length of 1 byte is selected and writing data of length
more than QSPI_WLEN_MAX_BYTES, first MAX_BYTES will be transfered
and remaining will be transfered byte by byte. In that case wlen
field should be cleared before setting.

Signed-off-by: Prahlad V <prahlad.eee@...il.com>
---
 drivers/spi/spi-ti-qspi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/spi/spi-ti-qspi.c b/drivers/spi/spi-ti-qspi.c
index 29ea8d2..6c61f54 100644
--- a/drivers/spi/spi-ti-qspi.c
+++ b/drivers/spi/spi-ti-qspi.c
@@ -276,9 +276,9 @@ static int qspi_write_msg(struct ti_qspi *qspi, struct spi_transfer *t,
 				cmd |= QSPI_WLEN(QSPI_WLEN_MAX_BITS);
 			} else {
 				writeb(*txbuf, qspi->base + QSPI_SPI_DATA_REG);
-				cmd = qspi->cmd | QSPI_WR_SNGL;
 				xfer_len = wlen;
-				cmd |= QSPI_WLEN(wlen);
+				cmd = ((qspi->cmd & ~QSPI_WLEN_MASK) |
+					     QSPI_WLEN(wlen));
 			}
 			break;
 		case 2:
-- 
2.5.5