From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-164.synserver.de ([212.40.185.164]:1056 "EHLO smtp-out-163.synserver.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754538Ab3I1Jax (ORCPT ); Sat, 28 Sep 2013 05:30:53 -0400 From: Lars-Peter Clausen To: Jonathan Cameron Cc: linux-iio@vger.kernel.org, Lars-Peter Clausen Subject: [PATCH 22/25] staging:iio:ad799x: Report scale as fractional value Date: Sat, 28 Sep 2013 11:31:54 +0200 Message-Id: <1380360717-26103-22-git-send-email-lars@metafoo.de> In-Reply-To: <1380360717-26103-1-git-send-email-lars@metafoo.de> References: <1380360717-26103-1-git-send-email-lars@metafoo.de> Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org Move the complexity of calculating the fixed point scale to the core. Signed-off-by: Lars-Peter Clausen --- drivers/staging/iio/adc/ad799x_core.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c index 3f5142b..eb6a690 100644 --- a/drivers/staging/iio/adc/ad799x_core.c +++ b/drivers/staging/iio/adc/ad799x_core.c @@ -163,7 +163,6 @@ static int ad799x_read_raw(struct iio_dev *indio_dev, { int ret; struct ad799x_state *st = iio_priv(indio_dev); - unsigned int scale_uv; switch (m) { case IIO_CHAN_INFO_RAW: @@ -180,10 +179,9 @@ static int ad799x_read_raw(struct iio_dev *indio_dev, RES_MASK(chan->scan_type.realbits); return IIO_VAL_INT; case IIO_CHAN_INFO_SCALE: - scale_uv = (st->int_vref_mv * 1000) >> chan->scan_type.realbits; - *val = scale_uv / 1000; - *val2 = (scale_uv % 1000) * 1000; - return IIO_VAL_INT_PLUS_MICRO; + *val = st->int_vref_mv; + *val2 = chan->scan_type.realbits; + return IIO_VAL_FRACTIONAL_LOG2; } return -EINVAL; } -- 1.8.0