From 16ea10a7d557a0177cbbd716b4a06e5373d513ba Mon Sep 17 00:00:00 2001 From: Michael Hennerich <michael.hennerich@analog.com> Date: Wed, 30 Jun 2010 14:51:09 -0700 Subject: Input: ad7879 - use i2c_smbus_read_i2c_block_data() to lower overhead Avoid additional addressing overhead incurred by word_data transfers. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru> --- drivers/input/touchscreen/ad7879-i2c.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/input') diff --git a/drivers/input/touchscreen/ad7879-i2c.c b/drivers/input/touchscreen/ad7879-i2c.c index 81937b21e9d..d82a38ee9a3 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; } -- cgit v1.2.3-18-g5258