Similar patch as reported by Oskar Schirmer <os@xxxxxxxxx> for the
AD7877.
With no word size given in the users platform data, a generic spi host
controller driver will assume a default word size of eight bit.
Ensure spi->bits_per_word is set for 16-bit transfers.
Signed-off-by: Michael Hennerich <Michael.hennerich@xxxxxxxxxx>
---
drivers/input/touchscreen/ad7879.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/input/touchscreen/ad7879.c
b/drivers/input/touchscreen/ad7879.c
index 794d070..ff490c0 100644
--- a/drivers/input/touchscreen/ad7879.c
+++ b/drivers/input/touchscreen/ad7879.c
@@ -715,6 +715,16 @@ static int __devinit ad7879_probe(struct spi_device
*spi)
return -EINVAL;
}
+ if (spi->bits_per_word != 16) {
+ spi->bits_per_word = 16;
+ error = spi_setup(spi);
+ if (error) {
+ dev_dbg(&spi->dev,
+ "spi master doesn't support 16 bits/word\n");
+ return error;
+ }
+ }
+
ts = kzalloc(sizeof(struct ad7879), GFP_KERNEL);
if (!ts)
return -ENOMEM;
--
1.6.0.2
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