From: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Avoid additional addressing overhead incurred by word_data transfers.
Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx>
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
drivers/input/touchscreen/ad7879-i2c.c | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c
index f75f753..79e3857 100644
--- a/drivers/input/touchscreen/ad7879-i2c.c
+++ b/drivers/input/touchscreen/ad7879-i2c.c
@@ -51,10 +51,13 @@ static int ad7879_i2c_read(struct device *dev, u8 reg)
static int ad7879_i2c_multi_read(struct device *dev,
u8 first_reg, u8 count, u16 *buf)
{
+ struct i2c_client *client = to_i2c_client(dev);
u8 idx;
+ i2c_smbus_read_i2c_block_data(client, first_reg, count * 2, (u8 *)buf);
+
for (idx = 0; idx < count; ++idx)
- buf[idx] = ad7879_i2c_read(dev, first_reg + idx);
+ buf[idx] = swab16(buf[idx]);
return 0;
}
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