From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt1-f194.google.com ([209.85.160.194]:37202 "EHLO mail-qt1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726763AbeJZHEi (ORCPT ); Fri, 26 Oct 2018 03:04:38 -0400 Date: Thu, 25 Oct 2018 19:30:04 -0300 From: Renato Lui Geh To: lars@metafoo.de, Michael.Hennerich@analog.com, jic23@kernel.org, knaack.h@gmx.de, pmeerw@pmeerw.net, gregkh@linuxfoundation.org, alexandru.Ardelean@analog.com, stefan.popa@analog.com, giuliano.belinassi@usp.br Cc: linux-iio@vger.kernel.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, kernel-usp@googlegroups.com Subject: [PATCH v2 1/2] staging: iio: ad7780: update voltage on read Message-ID: <1f7b2c6ee0e18b1c43a8b27f482b08313c52d4e9.1540506298.git.renatogeh@gmail.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed In-Reply-To: Sender: linux-iio-owner@vger.kernel.org List-Id: linux-iio@vger.kernel.org The ad7780 driver previously did not read the correct device output, as it read an outdated value set at initialization. It now updates its voltage on read. Signed-off-by: Renato Lui Geh --- drivers/staging/iio/adc/ad7780.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index b67412db0318..27972563bb6a 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -87,11 +87,15 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, long m) { struct ad7780_state *st = iio_priv(indio_dev); + int voltage_uv = 0; switch (m) { case IIO_CHAN_INFO_RAW: return ad_sigma_delta_single_conversion(indio_dev, chan, val); case IIO_CHAN_INFO_SCALE: + voltage_uv = regulator_get_voltage(st->reg); + if (voltage_uv) + st->int_vref_mv = voltage_uv/1000; *val = st->int_vref_mv * st->gain; *val2 = chan->scan_type.realbits - 1; return IIO_VAL_FRACTIONAL_LOG2; -- 2.19.1