[PATCH 1/5] drm/panel: s6e63m0: Simplify SPI writing

[Linus Walleij]

This writing code is equivalent to the spi_write()
helper in the SPI framework. Insert a comment
that this will always work fine since SPI buffers
are in native endianness.

Cc: Stephan Gerhold <stephan at gerhold.net>
Cc: Paweł Chmiel <pawel.mikolaj.chmiel at gmail.com>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
---
 drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
index d298d780220d..75f00ed4810b 100644
--- a/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
+++ b/drivers/gpu/drm/panel/panel-samsung-s6e63m0-spi.c
@@ -25,16 +25,9 @@ static int s6e63m0_spi_dcs_read(struct device *dev, const u8 cmd, u8 *data)
 static int s6e63m0_spi_write_word(struct device *dev, u16 data)
 {
 	struct spi_device *spi = to_spi_device(dev);
-	struct spi_transfer xfer = {
-		.len	= 2,
-		.tx_buf = &data,
-	};
-	struct spi_message msg;
 
-	spi_message_init(&msg);
-	spi_message_add_tail(&xfer, &msg);
-
-	return spi_sync(spi, &msg);
+	/* SPI buffers are always in CPU order */
+	return spi_write(spi, &data, 2);
 }
 
 static int s6e63m0_spi_dcs_write(struct device *dev, const u8 *data, size_t len)
-- 
2.26.2