From nobody Thu Oct 2 18:19:33 2025 Received: from mail.subdimension.ro (nalicastle.subdimension.ro [172.105.74.154]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB55B2F60C9; Sat, 13 Sep 2025 15:40:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=172.105.74.154 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757778021; cv=none; b=ULpU8PYt9hz1G2E9ZIckXxZ9oG0phL/G/JElEPmFpRVPJNXQDtjw/qKHD1faFsaY+uoZPJ/vyz3AXThCsEt90gVcXgZhg6C5P0nCBiWo6f+5lTjxirHeagfEju8nFO6hfrJXetmq2Z1OSnqveJIzIL1vKEo98p8vtUGgHOqinnY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757778021; c=relaxed/simple; bh=sUyLK4mjiPxml6XLVuyl+KqXPWsk9XNuaLa7OgMP9DY=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=j7ndWIWcv2LjJctsewOWKNxyjRKWnJ38zj1aTsNY8V1wCAvZBMktz+4we8NG8NlycH06UK0f4IiNzfYz40RiRmlZNn+s2/uvDv5DdLcDguz57i0u9qbkZq6cvrDOdnrYXm+v9LGD4hdTc7GH3Du6BGTagn9jA3qZ1ggIw9uzruM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=subdimension.ro; spf=pass smtp.mailfrom=subdimension.ro; dkim=pass (2048-bit key) header.d=subdimension.ro header.i=@subdimension.ro header.b=LufokHwa; arc=none smtp.client-ip=172.105.74.154 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=subdimension.ro Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=subdimension.ro Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=subdimension.ro header.i=@subdimension.ro header.b="LufokHwa" Received: from [10.212.0.13] (unknown [IPv6:2a02:2f0e:3e0c:5b00:e2d5:5eff:fed9:f1c4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange x25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mail.subdimension.ro (Postfix) with ESMTPSA id 5D8DE173BF8; Sat, 13 Sep 2025 18:40:11 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subdimension.ro; s=mail; t=1757778011; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=84hboF7CiZVHfrjWCxq7XHkJM0RXSj6s0PaFgrkOxYY=; b=LufokHwa6+K4ikmLTJiwTXdVjWbytrU+YdVBQNzfx9FBdhsOdpU4cEWhwJwKwiWy+qzE33 /9LWnIZ1/a3gJ21wuP1tr4lbzw8nuV0qOyq8Brhg6cwh1qxhJiEKATIkeSRRfBvGdH2pPN CgtRDYY7doqu5Tbqy0g2iQRsukP/gmtOYTyl1JMRGwBo/nJJ1y3iTSoKJGxbxU9f6AdumM DCqNepGoaEgcsPxLXqnYKRjpsPEG6nPtLlZ+0pkoNM2GQr1w6D/qxTkZLpxn1ItIMokDBL 9t5aWMGfypjaEcpPZM4N5V1m+I1iXOlHJWwP7MqbJ1tKwRbnjCRMSmv6tOMTKg== From: Petre Rodan Date: Sat, 13 Sep 2025 18:39:37 +0300 Subject: [PATCH v3 16/18] iio: accel: bma220: add LPF cut-off frequency mapping Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250913-b4-bma220_improvements-v3-16-0b97279b4e45@subdimension.ro> References: <20250913-b4-bma220_improvements-v3-0-0b97279b4e45@subdimension.ro> In-Reply-To: <20250913-b4-bma220_improvements-v3-0-0b97279b4e45@subdimension.ro> To: Jonathan Cameron , David Lechner , =?utf-8?q?Nuno_S=C3=A1?= , Andy Shevchenko , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: Jonathan Cameron , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Petre Rodan X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4181; i=petre.rodan@subdimension.ro; h=from:subject:message-id; bh=sUyLK4mjiPxml6XLVuyl+KqXPWsk9XNuaLa7OgMP9DY=; b=owEBbQKS/ZANAwAIAc8mmZmETn8wAcsmYgBoxZBSADDmM2duwKa5lMTwu74KlgE5tph4z3oHe 5YtI2763M+JAjMEAAEIAB0WIQTYCn/BdhUZNew+X6nPJpmZhE5/MAUCaMWQUgAKCRDPJpmZhE5/ MIT2EACybHMNu0NhmB6ZoObb0nOl3GxfXLrOxnwDsgNOWOj7dMWzrejPVsIzD3c4QK7BRkK9fWN g+CVamykWC2jkcOW3ckg8b9PHqfQ5+KYJjYPPgbFfp9ObqR1JGmkjlzaGCee1DchS8LoN7D0JCe 5vJ5r5w9g3RK3koRX7QhPdFAxL5XjECy1sIsPxsNmOoJe+Dtrg4Z1hP+Q5Y4Lq3NRwzs0BJswgR 7T3gUZbHewhD2URiZpFAiIpUu9EIgI/p7FggdfIVKa9Cvi9AN+rpdeYJeEl9H7CRefKbhGDEjZE 8l27RxhDeJD3U4ScbksK3gzPWDa8K62EYAhV/lvMnj5s6/xnob+EKsCQ1jGdr4jgOT6mnQSb2/C um6nVKaFJSniX2Kf+XnUyMfBOP9ijNE2sDVBvHsc7K8+XFaZOC0gjEIeX7xI5/Oj4PoktA9fF/O yllBL1qHRVw8b9kDr5U5p/iab/gSxfMQ3KXKSLICWQmyeD0dl2Lt7+4uyZmyrIseEnMNEveSw3w if/BFhHlLMJf/2K+4UNbbY4bUuizudMzP7Uv7AK8Uq4JhjDgkyUupHeH4pMzgFk+wUR7PeeSq0i IsLEK6d7DxnQc46xxLQ2ckZ6huLfRQ0Hxc8/FLqo9OkHYdZgwIey7PaSGKDpIcwSjb/1shXzdmN fIx1FcnpfY2WslA== X-Developer-Key: i=petre.rodan@subdimension.ro; a=openpgp; fpr=D80A7FC176151935EC3E5FA9CF269999844E7F30 Add mapping for the low pass filter cut-off frequency. Make valid values visible for both the cut-off frequency and the scale. Signed-off-by: Petre Rodan --- v1->v2 rename variables to include unit capitalization (dB, Hz) v2->v3 3->1 line comment (Jonathan) --- drivers/iio/accel/bma220_core.c | 59 +++++++++++++++++++++++++++++++++++++= +++- 1 file changed, 58 insertions(+), 1 deletion(-) diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_cor= e.c index 6297882bcf1b955291a2d8747984648bc6ee8512..508a1142a74b3fb330eea5222c4= b0abc8fc37e49 100644 --- a/drivers/iio/accel/bma220_core.c +++ b/drivers/iio/accel/bma220_core.c @@ -94,13 +94,23 @@ =20 #define BMA220_DEVICE_NAME "bma220" =20 +#define BMA220_COF_1000Hz 0x0 +#define BMA220_COF_500Hz 0x1 +#define BMA220_COF_250Hz 0x2 +#define BMA220_COF_125Hz 0x3 +#define BMA220_COF_64Hz 0x4 +#define BMA220_COF_32Hz 0x5 + #define BMA220_ACCEL_CHANNEL(index, reg, axis) { \ .type =3D IIO_ACCEL, \ .address =3D reg, \ .modified =3D 1, \ .channel2 =3D IIO_MOD_##axis, \ .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW), \ - .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_SCALE), \ + .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_SCALE) | \ + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ + .info_mask_shared_by_type_available =3D BIT(IIO_CHAN_INFO_SCALE) |\ + BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY), \ .scan_index =3D index, \ .scan_type =3D { \ .sign =3D 's', \ @@ -125,6 +135,7 @@ struct bma220_data { struct device *dev; struct regmap *regmap; struct mutex lock; + u8 lpf_3dB_freq_idx; u8 range_idx; struct iio_trigger *trig; struct { @@ -141,6 +152,16 @@ static const struct iio_chan_spec bma220_channels[] = =3D { IIO_CHAN_SOFT_TIMESTAMP(3), }; =20 +/* Available cut-off frequencies of the low pass filter in Hz. */ +static const int bma220_lpf_3dB_freq_Hz_table[] =3D { + [BMA220_COF_1000Hz] =3D 1000, + [BMA220_COF_500Hz] =3D 500, + [BMA220_COF_250Hz] =3D 250, + [BMA220_COF_125Hz] =3D 125, + [BMA220_COF_64Hz] =3D 64, + [BMA220_COF_32Hz] =3D 32, +}; + static const unsigned long bma220_accel_scan_masks[] =3D { BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z), 0 @@ -254,6 +275,10 @@ static int bma220_read_raw(struct iio_dev *indio_dev, *val =3D bma220_scale_table[index][0]; *val2 =3D bma220_scale_table[index][1]; return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + index =3D data->lpf_3dB_freq_idx; + *val =3D bma220_lpf_3dB_freq_Hz_table[index]; + return IIO_VAL_INT; } =20 return -EINVAL; @@ -272,6 +297,18 @@ static int bma220_find_match_2dt(const int (*tbl)[2], = const int n, return -EINVAL; } =20 +static int bma220_find_match(const int *arr, const int n, const int val) +{ + int i; + + for (i =3D 0; i < n; i++) { + if (arr[i] =3D=3D val) + return i; + } + + return -EINVAL; +} + static int bma220_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) @@ -297,6 +334,21 @@ static int bma220_write_raw(struct iio_dev *indio_dev, return ret; data->range_idx =3D index; =20 + return 0; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + index =3D bma220_find_match(bma220_lpf_3dB_freq_Hz_table, + ARRAY_SIZE(bma220_lpf_3dB_freq_Hz_table), + val); + if (index < 0) + return -EINVAL; + + ret =3D regmap_update_bits(data->regmap, BMA220_REG_FILTER, + BMA220_FILTER_MASK, + FIELD_PREP(BMA220_FILTER_MASK, index)); + if (ret < 0) + return ret; + data->lpf_3dB_freq_idx =3D index; + return 0; } =20 @@ -314,6 +366,11 @@ static int bma220_read_avail(struct iio_dev *indio_dev, *type =3D IIO_VAL_INT_PLUS_MICRO; *length =3D ARRAY_SIZE(bma220_scale_table) * 2; return IIO_AVAIL_LIST; + case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: + *vals =3D (const int *)bma220_lpf_3dB_freq_Hz_table; + *type =3D IIO_VAL_INT; + *length =3D ARRAY_SIZE(bma220_lpf_3dB_freq_Hz_table); + return IIO_AVAIL_LIST; default: return -EINVAL; } --=20 2.49.1