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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>
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1 changed files with 4 additions and 1 deletions
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@ -51,10 +51,13 @@ static int ad7879_i2c_read(struct device *dev, u8 reg)
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static int ad7879_i2c_multi_read(struct device *dev,
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u8 first_reg, u8 count, u16 *buf)
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{
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struct i2c_client *client = to_i2c_client(dev);
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u8 idx;
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i2c_smbus_read_i2c_block_data(client, first_reg, count * 2, (u8 *)buf);
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for (idx = 0; idx < count; ++idx)
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buf[idx] = ad7879_i2c_read(dev, first_reg + idx);
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buf[idx] = swab16(buf[idx]);
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return 0;
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}
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