From: Ben Collins <bcollins@kernel.org>
To: "Jonathan Cameron" <jic23@kernel.org>,
"David Lechner" <dlechner@baylibre.com>,
"Nuno Sá" <nuno.sa@analog.com>,
"Andy Shevchenko" <andy@kernel.org>,
"Antoniu Miclaus" <antoniu.miclaus@analog.com>,
"Lars-Peter Clausen" <lars@metafoo.de>,
"Michael Hennerich" <Michael.Hennerich@analog.com>
Cc: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org,
Ben Collins <bcollins@kernel.org>
Subject: [PATCH v7 3/5] ABI: sysfs-bus-iio: Document "ema" filter_type
Date: Mon, 25 Aug 2025 20:10:05 -0400 [thread overview]
Message-ID: <20250825-mcp9600-iir-v7-3-2ba676a52589@kernel.org> (raw)
In-Reply-To: <20250825-mcp9600-iir-v7-0-2ba676a52589@kernel.org>
Exponential Moving Average (EMA) is a first-order IIR filter.
This is a common IIR algorithm used in mcp9600 and others.
Signed-off-by: Ben Collins <bcollins@kernel.org>
---
Documentation/ABI/testing/sysfs-bus-iio | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-bus-iio b/Documentation/ABI/testing/sysfs-bus-iio
index df42a4040530ee96096b998bebc8a08b4fb2d78f..4e30f1db0a930f021cf07e5553d35a3feffddcc2 100644
--- a/Documentation/ABI/testing/sysfs-bus-iio
+++ b/Documentation/ABI/testing/sysfs-bus-iio
@@ -2281,6 +2281,8 @@ Description:
when reading sampling and frequency related attributes of
this filter, and return -EINVAL when trying to write these
attributes.
+ * "ema" - Exponential Moving Average (EMA) is a first-order
+ Infinite Impulse Response (IIR) filter.
* "sinc1" - The digital sinc1 filter. Fast 1st
conversion time. Poor noise performance.
* "sinc3" - The digital sinc3 filter. Moderate 1st
--
2.39.5
next prev parent reply other threads:[~2025-08-26 0:10 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-26 0:10 [PATCH v7 0/5] iio: mcp9600: Implement IIR feature and add iio core support Ben Collins
2025-08-26 0:10 ` [PATCH v7 1/5] iio: core: Add IIO_VAL_EMPTY type Ben Collins
2025-08-26 17:00 ` David Lechner
2025-08-26 18:52 ` Ben Collins
2025-08-31 15:19 ` Jonathan Cameron
2025-08-26 0:10 ` [PATCH v7 2/5] ABI: sysfs-bus-iio: Disambiguate usage for filter_type "none" Ben Collins
2025-08-26 0:10 ` Ben Collins [this message]
2025-08-26 0:10 ` [PATCH v7 4/5] iio: mcp9600: Add support for IIR filter Ben Collins
2025-08-26 17:20 ` David Lechner
2025-08-26 19:08 ` Ben Collins
2025-08-26 0:10 ` [PATCH v7 5/5] iio: ad4080: Rework filter_type "none" logic Ben Collins
2025-08-26 16:51 ` David Lechner
2025-08-26 19:11 ` Ben Collins
2025-08-31 15:25 ` Jonathan Cameron
2025-08-26 8:14 ` [PATCH v7 0/5] iio: mcp9600: Implement IIR feature and add iio core support Andy Shevchenko
2025-08-26 9:38 ` Ben Collins
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