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 8046E30F800; Wed, 10 Sep 2025 07:58:12 +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=1757491094; cv=none; b=lnRbY+oS/6YhxcrmNaHlXl5lU5YYocOyBGt5PX+urshUyiOmsqAdj3IUocUWYNDsc7f+fBqAm9c3VQN0Yhz6JkvDrlO+ykPDOnyB3dThg0wxWF8qCjBv4qGkM6T9PBiv3jEC4P6T9GVwQXX9l4D/YkPe2yuAUE/Pd0Vbl+NXn4I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757491094; c=relaxed/simple; bh=RTZw4uDnll1cZJo23ly7UvXXjnqrpFWaLvHw980X6B4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=XMBXR6h5HBqu6BMoOdgNuH/sM+15sJeLHh1lsp/zNpVEpEgY6MRuNIEpWOuPeq88d2clXf8s64bRuEkyFBmYNir1RBo7nSKBZAuNuOdaJKYLLZzXNQfWTdl57RTMKHRRFgFnKGBULFpti1oz7MMHBwud3q7aRpONihwUscTK2j8= 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=53JYks8t; 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="53JYks8t" 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 2378F173BF1; Wed, 10 Sep 2025 10:58:05 +0300 (EEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=subdimension.ro; s=mail; t=1757491085; 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=hux/M/0FgLpbyrxaPAKanHcmyeYQoBgJs8k97/CVXwM=; b=53JYks8t0+deSdSZhFtm/LY8Y/qgMuekQ7+BKcwRDoWUOmzULDC2djmKkiI3Hff5RQmwt2 jjUI3OppNNJGb3xCyqE3vhGYzAqe7neyKA1Wef42wzylXfRKZq6iGDxIaIdzdlan7aMBP/ FTMnsoZ70CK+HZYibvFp+Xe6c/SVVhGu0JLeerkTJuQLB3UanAf+p3TJ+yIHL6UKvuNcfN omE5GgmUxIhuOVP6GSbi1brWBTmw6Yi0bySS0KkTfwIBiTKvEb0osdi/hT6F4saedZhWi2 9CDhNXfiLci446io8NYqXNHw+kC6hPS3RGZTqdyX/bomh43bqE4AZ4j91L0P1w== From: Petre Rodan Date: Wed, 10 Sep 2025 10:57:14 +0300 Subject: [PATCH v2 09/14] iio: accel: bma220: add i2c module 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-v2-9-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=5661; i=petre.rodan@subdimension.ro; h=from:subject:message-id; bh=RTZw4uDnll1cZJo23ly7UvXXjnqrpFWaLvHw980X6B4=; b=owEBbQKS/ZANAwAIAc8mmZmETn8wAcsmYgBowS+Hw8rlEeIDTwdyHE4qi5gTZmyv1TaFC3nDd TeIJl2Ncb2JAjMEAAEIAB0WIQTYCn/BdhUZNew+X6nPJpmZhE5/MAUCaMEvhwAKCRDPJpmZhE5/ MCYJEAC6Qy2lhMqXyUOmErnn+myXgdYx3+/Kcz5t8yiarQ4LC1+oTkOzYlmqOsSdGjh1Ol+tdRS W2amQ2AzEBAbA3RQSCKVL5cu2VUjGT3re/Md2XkQOVWgXUJSQFBC3FtAeQAR6G9rvkz4l2IYFPX kHn2kar7vMxRfdg7JdnGXyuUs1H7G/KuNr8v8vwdEzSuk2K1ERSGzizVyy/fF2fbjVpDx2xllXp wuK0gQ40How26Hp1iS7B6HaA/MG+NOnZuylfarZpgF1BO7aod0umVPbInlnJcGPhB9MYjKTcURi lx/4tM9HqSJHA56aXYnYubVVLBPK/UJ/BBzlB8PDwJzmY57SkzSVxsh2xXFjhw6xxXMe9E2rO29 HOrany/ASNyX6jOJkm6rsLGKlkIUbN4JesMWgqD/UJ4rFO/KbRDg0+7cQMB6UKGVB7DSgVCx3KQ 6HIZH/JrYMGj0e70wFYlGJkOFwuHJ/YG8SCisfPzquC+UeNy3GltFekoTr9z7617doov3YxK9km xqqMwGU/lHuBwh0NmzKCqBYm3XKIEIngAiHy+ca9FZS80Lp+tCPzumvgG8+UkQC0xwe/f6NhgtO z3+prBH2gQoyC/TNqNmUrOvkPB0kRaowvg0eEFwWQcSeldT+qv8zkqGpN5lMztIAFZG0JTBYF8V B7YhOkh1NrkKYRA== X-Developer-Key: i=petre.rodan@subdimension.ro; a=openpgp; fpr=D80A7FC176151935EC3E5FA9CF269999844E7F30 Add the bma220_i2c module. Note that this kernel module transparently shifts all register addresses 1 bit to the left, so all functions will operate based on the SPI memory map. Signed-off-by: Petre Rodan --- no change --- drivers/iio/accel/Kconfig | 9 +++++- drivers/iio/accel/Makefile | 1 + drivers/iio/accel/bma220.h | 1 + drivers/iio/accel/bma220_core.c | 18 ++++++++++++ drivers/iio/accel/bma220_i2c.c | 61 +++++++++++++++++++++++++++++++++++++= ++++ 5 files changed, 89 insertions(+), 1 deletion(-) diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 9b6c35b759481df5ff3c91856f8783357d25de80..b3c5b0b7a406ec0cec531a122af= 424cb8ec57703 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -221,6 +221,7 @@ config BMA220 select REGMAP select IIO_BUFFER select IIO_TRIGGERED_BUFFER + select BMA220_I2C if I2C select BMA220_SPI if SPI help Say yes here to add support for the Bosch BMA220 triaxial @@ -228,7 +229,13 @@ config BMA220 =20 To compile this driver as a module, choose M here: the module will be called bma220_core and you will also get - bma220_spi if SPI is enabled. + bma220_i2c if I2C is enabled and bma220_spi if SPI is + enabled. + +config BMA220_I2C + tristate + select REGMAP_I2C + depends on BMA220 =20 config BMA220_SPI tristate diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile index 56a9f848f7f913633bc2a628c1ac5c9190774b9d..fa440a85928398fee927081f605= 595ba9fbc4ad9 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -26,6 +26,7 @@ obj-$(CONFIG_ADXL380_I2C) +=3D adxl380_i2c.o obj-$(CONFIG_ADXL380_SPI) +=3D adxl380_spi.o obj-$(CONFIG_BMA180) +=3D bma180.o obj-$(CONFIG_BMA220) +=3D bma220_core.o +obj-$(CONFIG_BMA220_I2C) +=3D bma220_i2c.o obj-$(CONFIG_BMA220_SPI) +=3D bma220_spi.o obj-$(CONFIG_BMA400) +=3D bma400_core.o obj-$(CONFIG_BMA400_I2C) +=3D bma400_i2c.o diff --git a/drivers/iio/accel/bma220.h b/drivers/iio/accel/bma220.h index f9f4fa3daf33665f07f8bf073468dff070b46d74..384557d10d5613b7d829c6666f3= da06de219277a 100644 --- a/drivers/iio/accel/bma220.h +++ b/drivers/iio/accel/bma220.h @@ -12,6 +12,7 @@ #include =20 extern const struct regmap_config bma220_spi_regmap_config; +extern const struct regmap_config bma220_i2c_regmap_config; extern const struct dev_pm_ops bma220_pm_ops; =20 int bma220_common_probe(struct device *dev, struct regmap *regmap, int irq= ); diff --git a/drivers/iio/accel/bma220_core.c b/drivers/iio/accel/bma220_cor= e.c index 4d8b65ea737a2d5fe74f98da13a582a80874a5af..191074d8618ea2638f69283781b= 8677921876681 100644 --- a/drivers/iio/accel/bma220_core.c +++ b/drivers/iio/accel/bma220_core.c @@ -175,6 +175,24 @@ const struct regmap_config bma220_spi_regmap_config = =3D { }; EXPORT_SYMBOL_NS_GPL(bma220_spi_regmap_config, "IIO_BOSCH_BMA220"); =20 +/* + * Based on the datasheet the memory map differs between the SPI and the I= 2C + * implementations. I2C register addresses are simply shifted to the left + * by 1 bit yet the register size remains unchanged. + * This driver employs the SPI memory map to correlate register names to + * addresses regardless of the bus type. + */ + +const struct regmap_config bma220_i2c_regmap_config =3D { + .reg_bits =3D 8, + .val_bits =3D 8, + .reg_shift =3D -1, + .max_register =3D BMA220_REG_SOFTRESET, + .cache_type =3D REGCACHE_NONE, + .writeable_reg =3D bma220_is_writable_reg, +}; +EXPORT_SYMBOL_NS_GPL(bma220_i2c_regmap_config, "IIO_BOSCH_BMA220"); + static irqreturn_t bma220_trigger_handler(int irq, void *p) { int ret; diff --git a/drivers/iio/accel/bma220_i2c.c b/drivers/iio/accel/bma220_i2c.c new file mode 100644 index 0000000000000000000000000000000000000000..2b63949ea64ee11421e76a2e7c8= 68a922d1f9a12 --- /dev/null +++ b/drivers/iio/accel/bma220_i2c.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Bosch triaxial acceleration sensor + * + * Copyright (c) 2025 Petre Rodan + * + * Datasheet: https://media.digikey.com/pdf/Data%20Sheets/Bosch/BMA220.pdf + * I2C address is either 0x0b or 0x0a depending on CSB (pin 10) + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "bma220.h" + +static int bma220_i2c_probe(struct i2c_client *client) +{ + struct regmap *regmap; + + regmap =3D devm_regmap_init_i2c(client, &bma220_i2c_regmap_config); + if (IS_ERR(regmap)) + return dev_err_probe(&client->dev, PTR_ERR(regmap), + "failed to create regmap\n"); + + return bma220_common_probe(&client->dev, regmap, client->irq); +} + +static const struct of_device_id bma220_i2c_match[] =3D { + { .compatible =3D "bosch,bma220" }, + { } +}; +MODULE_DEVICE_TABLE(of, bma220_i2c_match); + +static const struct i2c_device_id bma220_i2c_id[] =3D { + { "bma220" }, + { } +}; +MODULE_DEVICE_TABLE(i2c, bma220_i2c_id); + +static struct i2c_driver bma220_i2c_driver =3D { + .driver =3D { + .name =3D "bma220_i2c", + .pm =3D pm_sleep_ptr(&bma220_pm_ops), + .of_match_table =3D bma220_i2c_match, + }, + .probe =3D bma220_i2c_probe, + .id_table =3D bma220_i2c_id, +}; +module_i2c_driver(bma220_i2c_driver); + +MODULE_AUTHOR("Petre Rodan "); +MODULE_DESCRIPTION("Bosch triaxial acceleration sensor i2c driver"); +MODULE_LICENSE("GPL"); +MODULE_IMPORT_NS("IIO_BOSCH_BMA220"); --=20 2.49.1