[v2,5/8] iio: afe: rescale: add upstream offset support

Message ID	20210607144718.1724413-6-liambeguin@gmail.com
State	New
Headers	show Return-Path: <devicetree-owner@kernel.org> From: Liam Beguin <liambeguin@gmail.com> To: liambeguin@gmail.com, peda@axentia.se, jic23@kernel.org, lars@metafoo.de, pmeerw@pmeerw.net Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org, devicetree@vger.kernel.org, robh+dt@kernel.org Subject: [PATCH v2 5/8] iio: afe: rescale: add upstream offset support Date: Mon, 7 Jun 2021 10:47:15 -0400 Message-Id: <20210607144718.1724413-6-liambeguin@gmail.com> In-Reply-To: <20210607144718.1724413-1-liambeguin@gmail.com> References: <20210607144718.1724413-1-liambeguin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	iio: afe: add temperature rescaling support \| expand [v2,0/8] iio: afe: add temperature rescaling support [v2,1/8] iio: inkern: apply consumer scale on IIO_VAL_INT cases [v2,2/8] iio: inkern: apply consumer scale when no channel scale is available [v2,3/8] iio: inkern: error out on unsupported offset type [v2,4/8] iio: inkern: return valid type on raw to processed conversion [v2,5/8] iio: afe: rescale: add upstream offset support [v2,6/8] iio: afe: rescale: add offset support [v2,7/8] iio: afe: rescale: add temperature sensor support [v2,8/8] dt-bindings: iio: afe: add binding for temperature-sense-amplifier

Message ID

20210607144718.1724413-6-liambeguin@gmail.com

State

New

Headers

From: Liam Beguin <liambeguin@gmail.com>
To: liambeguin@gmail.com, peda@axentia.se, jic23@kernel.org,
	lars@metafoo.de, pmeerw@pmeerw.net
Cc: linux-kernel@vger.kernel.org, linux-iio@vger.kernel.org,
	devicetree@vger.kernel.org, robh+dt@kernel.org
Subject: [PATCH v2 5/8] iio: afe: rescale: add upstream offset support
Date: Mon,  7 Jun 2021 10:47:15 -0400
Message-Id: <20210607144718.1724413-6-liambeguin@gmail.com>
In-Reply-To: <20210607144718.1724413-1-liambeguin@gmail.com>
References: <20210607144718.1724413-1-liambeguin@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Series

iio: afe: add temperature rescaling support | expand

Commit Message

Liam Beguin June 7, 2021, 2:47 p.m. UTC

From: Liam Beguin <lvb@xiphos.com>

Default to using iio_read_channel_processed() if the upstream channel
exposes an offset.

When possible, it's preferable to avoid using
iio_read_channel_processed() to maintain as much precision as possible.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
---
 drivers/iio/afe/iio-rescale.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c
index 774eb3044edd..e34148d39b39 100644
--- a/drivers/iio/afe/iio-rescale.c
+++ b/drivers/iio/afe/iio-rescale.c
@@ -148,7 +148,10 @@  static int rescale_configure_channel(struct device *dev,
 	chan->ext_info = rescale->ext_info;
 	chan->type = rescale->cfg->type;
 
-	if (iio_channel_has_info(schan, IIO_CHAN_INFO_RAW) ||
+	if (iio_channel_has_info(schan, IIO_CHAN_INFO_OFFSET)) {
+		dev_info(dev, "found upstream offset, using processed value\n");
+		rescale->chan_processed = true;
+	} else if (iio_channel_has_info(schan, IIO_CHAN_INFO_RAW) ||
 	    iio_channel_has_info(schan, IIO_CHAN_INFO_SCALE)) {
 		dev_info(dev, "using raw+scale source channel\n");
 	} else if (iio_channel_has_info(schan, IIO_CHAN_INFO_PROCESSED)) {

[v2,5/8] iio: afe: rescale: add upstream offset support

Commit Message

Patch