iio: accel: add ADXL380 driver

The ADXL380/ADXL382 is a low noise density, low power, 3-axis
accelerometer with selectable measurement ranges. The ADXL380 supports
the +/-4 g, +/-8 g, and +/-16 g ranges, and the ADXL382 supports
+/-15 g, +/-30 g and +/-60 g ranges.
The ADXL380/ADXL382 offers industry leading noise, enabling precision
applications with minimal calibration. The low noise, and low power
ADXL380/ADXL382 enables accurate measurement in an environment with
high vibration, heart sounds and audio.

In addition to its low power consumption, the ADXL380/ADXL382 has many
features to enable true system level performance. These include a
built-in micropower temperature sensor, single / double / triple tap
detection and a state machine to prevent a false triggering. In
addition, the ADXL380/ADXL382 has provisions for external control of
the sampling time and/or an external clock.

Signed-off-by: Ramona Gradinariu <ramona.gradinariu@analog.com>
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
Link: https://patch.msgid.link/20240708104114.29894-2-antoniu.miclaus@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/iio/accel/adxl380_i2c.c b/drivers/iio/accel/adxl380_i2c.c
new file mode 100644
index 000000000000..1dc1e77be815
--- /dev/null
+++ b/drivers/iio/accel/adxl380_i2c.c
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * ADXL380 3-Axis Digital Accelerometer I2C driver
+ *
+ * Copyright 2024 Analog Devices Inc.
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "adxl380.h"
+
+static const struct regmap_config adxl380_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.readable_noinc_reg = adxl380_readable_noinc_reg,
+};
+
+static int adxl380_i2c_probe(struct i2c_client *client)
+{
+	struct regmap *regmap;
+	const struct adxl380_chip_info *chip_data;
+
+	chip_data = i2c_get_match_data(client);
+
+	regmap = devm_regmap_init_i2c(client, &adxl380_regmap_config);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+
+	return adxl380_probe(&client->dev, regmap, chip_data);
+}
+
+static const struct i2c_device_id adxl380_i2c_id[] = {
+	{ "adxl380", (kernel_ulong_t)&adxl380_chip_info },
+	{ "adxl382", (kernel_ulong_t)&adxl382_chip_info },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, adxl380_i2c_id);
+
+static const struct of_device_id adxl380_of_match[] = {
+	{ .compatible = "adi,adxl380", .data = &adxl380_chip_info },
+	{ .compatible = "adi,adxl382", .data = &adxl382_chip_info },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, adxl380_of_match);
+
+static struct i2c_driver adxl380_i2c_driver = {
+	.driver = {
+		.name = "adxl380_i2c",
+		.of_match_table = adxl380_of_match,
+	},
+	.probe = adxl380_i2c_probe,
+	.id_table = adxl380_i2c_id,
+};
+
+module_i2c_driver(adxl380_i2c_driver);
+
+MODULE_AUTHOR("Ramona Gradinariu <ramona.gradinariu@analog.com>");
+MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com>");
+MODULE_DESCRIPTION("Analog Devices ADXL380 3-axis accelerometer I2C driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_ADXL380);