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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 v3 05/10] iio: afe: rescale: add INT_PLUS_{MICRO,NANO} support
Date: Wed, 30 Jun 2021 21:00:29 -0400	[thread overview]
Message-ID: <20210701010034.303088-6-liambeguin@gmail.com> (raw)
In-Reply-To: <20210701010034.303088-1-liambeguin@gmail.com>

From: Liam Beguin <lvb@xiphos.com>

Add IIO_VAL_INT_PLUS_{NANO,MICRO} scaling support.
Scale the integer part and the decimal parts individually and keep the
original scaling type.

Signed-off-by: Liam Beguin <lvb@xiphos.com>
---
 drivers/iio/afe/iio-rescale.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/iio/afe/iio-rescale.c b/drivers/iio/afe/iio-rescale.c
index 98bcb5d418d6..8f79c582519c 100644
--- a/drivers/iio/afe/iio-rescale.c
+++ b/drivers/iio/afe/iio-rescale.c
@@ -87,7 +87,16 @@ static int rescale_read_raw(struct iio_dev *indio_dev,
 			do_div(tmp, 1000000000LL);
 			*val = tmp;
 			return ret;
+		case IIO_VAL_INT_PLUS_NANO:
+			fallthrough;
+		case IIO_VAL_INT_PLUS_MICRO:
+			tmp = (s64)*val * rescale->numerator;
+			*val = div_s64(tmp, rescale->denominator);
+			tmp = (s64)*val2 * rescale->numerator;
+			*val2 = div_s64(tmp, rescale->denominator);
+			return ret;
 		default:
+			dev_err(&indio_dev->dev, "unsupported type %d\n", ret);
 			return -EOPNOTSUPP;
 		}
 	default:
-- 
2.30.1.489.g328c10930387


  parent reply	other threads:[~2021-07-01  1:01 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-01  1:00 [PATCH v3 00/10] iio: afe: add temperature rescaling support Liam Beguin
2021-07-01  1:00 ` [PATCH v3 01/10] iio: inkern: apply consumer scale on IIO_VAL_INT cases Liam Beguin
2021-07-01  1:00 ` [PATCH v3 02/10] iio: inkern: apply consumer scale when no channel scale is available Liam Beguin
2021-07-01  1:00 ` [PATCH v3 03/10] iio: inkern: make a best effort on offset calculation Liam Beguin
2021-07-04 16:26   ` Jonathan Cameron
2021-07-04 18:03     ` Liam Beguin
2021-07-01  1:00 ` [PATCH v3 04/10] iio: afe: rescale: reduce risk of integer overflow Liam Beguin
2021-07-04 16:36   ` Jonathan Cameron
2021-07-05  4:23     ` Liam Beguin
2021-07-05  8:29       ` Jonathan Cameron
2021-07-01  1:00 ` Liam Beguin [this message]
2021-07-04 16:37   ` [PATCH v3 05/10] iio: afe: rescale: add INT_PLUS_{MICRO,NANO} support Jonathan Cameron
2021-07-01  1:00 ` [PATCH v3 06/10] iio: afe: rescale: add offset support Liam Beguin
2021-07-04 16:53   ` Jonathan Cameron
2021-07-05  4:27     ` Liam Beguin
2021-07-01  1:00 ` [PATCH v3 07/10] iio: afe: rescale: add RTD temperature sensor support Liam Beguin
2021-07-01  1:00 ` [PATCH v3 08/10] iio: afe: rescale: add temperature transducers Liam Beguin
2021-07-01  1:00 ` [PATCH v3 09/10] dt-bindings: iio: afe: add bindings for temperature-sense-rtd Liam Beguin
2021-07-04 17:02   ` Jonathan Cameron
2021-07-05  4:31     ` Liam Beguin
2021-07-01  1:00 ` [PATCH v3 10/10] dt-bindings: iio: afe: add bindings for temperature transducers Liam Beguin

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