From nobody Fri Oct 3 12:26:33 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 BE26320E011; Mon, 1 Sep 2025 19:48:03 +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=1756756086; cv=none; b=k9SpN6fGEh5CNPxjh/83GGXslPUZKCq9QXJkWEV8CfZexoFaeuWN0soMgvk3gKIBsEhRckuav+DCmzrJGgYtv9txCoDlyN0WJlhdDoBoVlHpOjJCd6a7ofC21gisGoP/N7JwoJvIZfvrQG++ewans/PsMfyXU1m4awwvks22Jcc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756756086; c=relaxed/simple; bh=wLmWmflf8u7y40Xzi81r7dRJzmbcJfPGyzoimcWuoDQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=a403Y34U3irZBQe22YnzNant59ddryAhUWW1yHW6Zo047G8Kgwiu2w9QpVe1FbeRsJKJDH+lMSehPDGO+FKREG2Z+Z2yI5ZQ6Mejv0QSqZuwq0JstUXj7+KdfUkUYmcChjFJauIW/lFOCCOcncD0bU7o3yPSi/vC1E5hBtrWPwU= 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=bJYOUVGh; 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="bJYOUVGh" Received: from localhost.localdomain (unknown [IPv6:2a02:2f0e:3503:4a00: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 9E656173BEE; Mon, 01 Sep 2025 22:47:56 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subdimension.ro; s=mail; t=1756756076; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=69u6iKKI76eah3bWQ71TVwjN/VHHBc+0BJ2bQX2S/fU=; b=bJYOUVGh9IisUx3CTNDqzNswCMJmeO86RnNaUveDT9eDBzrpUmGwXK+hG9F/VXK3mV1RW+ hwQCRPA8uF+4Ub/t1hORAKqNdTIjJJdJZiRZqWjht+aiFvTHkdTaCxwZtwygb5Q7yeOavN aaQUNRqHVEcY/41lFtc2EXdrZ5u+UiNpcAOXJgrQmc+8LZ4g+5t3l30gm3pNkx8IPxv/1q 7lajN7Lz2UFBjbKzaUhEmIsbI4xyYQZLtCyUFCzq2b09bDl9zF6R+4dhYdqefJ9+HJnGM8 R5bR8uNRqi2sIyRpFPbN3FeizhaGmbpWhKIi4+zeSko2Lc26ppt/DBw+soZRUA== From: Petre Rodan To: linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Petre Rodan , Jonathan Cameron , David Lechner , =?UTF-8?q?Nuno=20S=C3=A1?= , Andy Shevchenko Subject: [PATCH 06/10] iio: accel: BMA220 add LPF cut-off frequency mapping Date: Mon, 1 Sep 2025 22:47:32 +0300 Message-ID: <20250901194742.11599-7-petre.rodan@subdimension.ro> X-Mailer: git-send-email 2.49.1 In-Reply-To: <20250901194742.11599-1-petre.rodan@subdimension.ro> References: <20250901194742.11599-1-petre.rodan@subdimension.ro> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" - 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 --- drivers/iio/accel/bma220_core.c | 60 ++++++++++++++++++++++++++++++++- 1 file changed, 59 insertions(+), 1 deletion(-) diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_cor= e.c index 86347cf8ab1e..e60acd62cf96 100644 --- a/drivers/iio/accel/bma220_core.c +++ b/drivers/iio/accel/bma220_core.c @@ -4,6 +4,15 @@ * * Copyright (c) 2016,2020 Intel Corporation. * Copyright (c) 2025 Petre Rodan + * + * + * Device register to IIO ABI mapping: + * + * Register | IIO ABI (sysfs) | valid valu= es + * --------------------------+--------------------------------+-----------= ---- + * scale (range) | in_accel_scale | see _avail= able + * cut-off freq (filt_config)| in_accel_filter_low_pass_... | see _avail= able + * -----------------------------------------------------------------------= ---- */ #include @@ -135,13 +144,23 @@ #define BMA220_DEVICE_NAME "bma220" +#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', \ @@ -172,6 +191,7 @@ 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 { @@ -188,6 +208,18 @@ static const struct iio_chan_spec bma220_channels[] = =3D { IIO_CHAN_SOFT_TIMESTAMP(3), }; +/* + * Available cut-off frequencies of the low pass filter in Hz. + */ +static const int bma220_lpf_3db_freq_hz_table[][2] =3D { + [BMA220_COF_1000HZ] =3D {1000, 0}, + [BMA220_COF_500HZ] =3D {500, 0}, + [BMA220_COF_250HZ] =3D {250, 0}, + [BMA220_COF_125HZ] =3D {125, 0}, + [BMA220_COF_64HZ] =3D {64, 0}, + [BMA220_COF_32HZ] =3D {32, 0}, +}; + static const unsigned long bma220_accel_scan_masks[] =3D { BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z), 0 @@ -309,6 +341,11 @@ 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][0]; + *val2 =3D bma220_lpf_3db_freq_hz_table[index][1]; + return IIO_VAL_INT_PLUS_MICRO; } return -EINVAL; @@ -353,6 +390,22 @@ static int bma220_write_raw(struct iio_dev *indio_dev, "failed to set measurement range\n"); data->range_idx =3D index; + 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, val2); + 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) + dev_err(data->dev, + "failed to set low pass filter\n"); + data->lpf_3db_freq_idx =3D index; + return 0; } @@ -370,6 +423,11 @@ 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_PLUS_MICRO; + *length =3D ARRAY_SIZE(bma220_lpf_3db_freq_hz_table) * 2; + return IIO_AVAIL_LIST; default: return -EINVAL; } -- 2.49.1