From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out-164.synserver.de ([212.40.185.164]:1146 "EHLO smtp-out-163.synserver.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1754538Ab3I1Jav (ORCPT ); Sat, 28 Sep 2013 05:30:51 -0400 From: Lars-Peter Clausen To: Jonathan Cameron Cc: linux-iio@vger.kernel.org, Lars-Peter Clausen Subject: [PATCH 21/25] staging:iio:ad7780: Report scale as fractional value Date: Sat, 28 Sep 2013 11:31:53 +0200 Message-Id: <1380360717-26103-21-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/ad7780.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index 4f2522a..273add3 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -90,17 +90,14 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, long m) { struct ad7780_state *st = iio_priv(indio_dev); - unsigned long scale_uv; switch (m) { case IIO_CHAN_INFO_RAW: return ad_sigma_delta_single_conversion(indio_dev, chan, val); case IIO_CHAN_INFO_SCALE: - scale_uv = (st->int_vref_mv * 100000 * st->gain) - >> (chan->scan_type.realbits - 1); - *val = scale_uv / 100000; - *val2 = (scale_uv % 100000) * 10; - return IIO_VAL_INT_PLUS_MICRO; + *val = st->int_vref_mv * st->gain; + *val2 = chan->scan_type.realbits - 1; + return IIO_VAL_FRACTIONAL_LOG2; case IIO_CHAN_INFO_OFFSET: *val -= (1 << (chan->scan_type.realbits - 1)); return IIO_VAL_INT; -- 1.8.0