From nobody Thu Oct 2 23:49:45 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 9A0E830F94C; Wed, 10 Sep 2025 07:58:13 +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=1757491095; cv=none; b=GEfufRdb84TnaWC+GmAdJtVuN/qd5nlrytmMNi+ycr1/710swXRt51F442Meqrx3Hvab9rpbHNDYEg7Ojt7dOAkUiABajEGucfEZaf5UgkRgMLNNI5b7tcCtWlcolBeWIc/Z6Cchqq1tK671IzD7Z9apgd711Inzgeysx6Z3eGw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757491095; c=relaxed/simple; bh=409ZBhNOe9HaBHJimTYFEu+sSb/2bn/ZWFfpFbcTf1w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=X5Dj2CVrcXqMo7Gp8be7c9/knTE31HMdIq25lZCPORl3b8hCm6hAMLiPM+FaBU2QYlF1a0+61Cg5mfdpb1Ri8ycU2fqB34St7/9i8reUVx37uoG+R1SOdpFEfjXcShIgzqfMttbPvVLGTEbzlzeByrCzA6Mj5QFCkgPbNRhM5Wc= 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=YjdYGZqz; 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="YjdYGZqz" Received: from [10.212.0.13] (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 D2CFB173BF4; Wed, 10 Sep 2025 10:58:06 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subdimension.ro; s=mail; t=1757491087; 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=+au2rMrozozcPYNNCeRGGmu+HJEQku2dK2UlpDdDD10=; b=YjdYGZqzPatLMlFfdoD0jHPJW0Muix+bQANFwWp7VhlQScuRisY1RQ9stfreaNgmb8O3kd ZrNdibf+NkYl4e1TStu980OkwWcv3Venms6YCgIk/te/Djhy32zidPYtzTK5/3cpnCmIva KU4jHxDNtehWBRfCzk8VW2H7ZqRulGhdsRhnuzRkQ7JEsv89hRZ0enekmnwN0NX0/vZrW9 wW6a6mHJdxkXCm25cjOViPkKg8n50uWRthV8mLZJpz2547SlH2ujnlfJqWosEpS+8YMphQ D/adczSgXmN55vH+Tfb5EMCgLVAZGgUVgvdPGUofpAbdyygqES2J5YVmRUNCow== From: Petre Rodan Date: Wed, 10 Sep 2025 10:57:17 +0300 Subject: [PATCH v2 12/14] 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: <20250910-bma220_improvements-v2-12-e23f4f2b9745@subdimension.ro> References: <20250910-bma220_improvements-v2-0-e23f4f2b9745@subdimension.ro> In-Reply-To: <20250910-bma220_improvements-v2-0-e23f4f2b9745@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=4159; i=petre.rodan@subdimension.ro; h=from:subject:message-id; bh=409ZBhNOe9HaBHJimTYFEu+sSb/2bn/ZWFfpFbcTf1w=; b=owEBbQKS/ZANAwAIAc8mmZmETn8wAcsmYgBowS+HPCm0ikiLEQiLjqX1m/wkknHGFhxjAzzgV mKupNDtEwiJAjMEAAEIAB0WIQTYCn/BdhUZNew+X6nPJpmZhE5/MAUCaMEvhwAKCRDPJpmZhE5/ MA/yD/9ktP9s1b0h5lB6+PbbhaqMusltawg+V8AZBlmm5tdKQx4f+7nb2JkULMWMXysQszElD4c uFBoOzdY6V/b0ezGlLoezS5dZcEQvQ86c29ks2lyBQL75NYG/stblb/MUhS0oiZt/8yDX+lz+BI RDa0cc4t0MU9q3lHaHXTI9Km8DXycWshUG25uy/JBCDXhC3gsnmzs+XWlQFkB1OJiadMvzaVzov fkBo7jjUTDIpv52ygJA4FEEAFYlv9Qlz9sC4M8ze1eWYEHA9YSkfkNW5a4plUiEPNoB/RGCVKC8 5Ur6P8s5jR24DNbqyhEqq4UrUoyzAcaAoHBAQvNYe5ndw0Eo166YHuKWIESTNEcwcHOqvcHp+Uc dTVRibGA8sqHqZ27QdnxzS2gdpMUlS9cYTXVeP2DnTKuXwKXMEFTeplrDbmWO4iBcVrI9EavafF x59k1E9ne6IQ/5CWnd1XsdPqSyHyhZUuQ90n16mJr2pR6CkBjUrdk3UkPwXN26FZKOOl1TMmAtA 2TU/v3OasMlPOtBcSGGaQvBWONLSFikvMaVYdce9r8XBQ9pJ7564eXpVx9khuH7ZDLHLgonFn7D s6Z7/X5dXOoaA6JNIVa44TYDepTGO48WI+rQeXUTVkpbZdUG61UuMcScOoT40iC6umfc4Obax0h Nn2AkB0zwUt8Weg== 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 --- ChangeLog: - rename variables to include unit capitalization (dB, Hz) --- drivers/iio/accel/bma220_core.c | 61 +++++++++++++++++++++++++++++++++++++= +++- 1 file changed, 60 insertions(+), 1 deletion(-) diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_cor= e.c index 69bfd7f9f2b35e67835c6e1e41e02258e6741e7b..16a1aac5aa178ec06dc26e7e632= f8ec5f43b5f78 100644 --- a/drivers/iio/accel/bma220_core.c +++ b/drivers/iio/accel/bma220_core.c @@ -95,13 +95,23 @@ =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', \ @@ -126,6 +136,7 @@ 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 { @@ -142,6 +153,18 @@ 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 @@ -255,6 +278,10 @@ 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; @@ -273,6 +300,18 @@ 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) @@ -298,6 +337,21 @@ 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 @@ -315,6 +369,11 @@ 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