1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/iio/accel/adxl313_spi.c b/drivers/iio/accel/adxl313_spi.c
new file mode 100644
index 000000000..b7cc15678
--- /dev/null
+++ b/drivers/iio/accel/adxl313_spi.c
@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * ADXL313 3-Axis Digital Accelerometer
+ *
+ * Copyright (c) 2021 Lucas Stankus <lucas.p.stankus@gmail.com>
+ *
+ * Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ADXL313.pdf
+ */
+
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/spi/spi.h>
+#include <linux/property.h>
+
+#include "adxl313.h"
+
+static const struct regmap_config adxl31x_spi_regmap_config[] = {
+	[ADXL312] = {
+		.reg_bits	= 8,
+		.val_bits	= 8,
+		.rd_table	= &adxl312_readable_regs_table,
+		.wr_table	= &adxl312_writable_regs_table,
+		.max_register	= 0x39,
+		/* Setting bits 7 and 6 enables multiple-byte read */
+		.read_flag_mask	= BIT(7) | BIT(6),
+	},
+	[ADXL313] = {
+		.reg_bits	= 8,
+		.val_bits	= 8,
+		.rd_table	= &adxl313_readable_regs_table,
+		.wr_table	= &adxl313_writable_regs_table,
+		.max_register	= 0x39,
+		/* Setting bits 7 and 6 enables multiple-byte read */
+		.read_flag_mask	= BIT(7) | BIT(6),
+	},
+	[ADXL314] = {
+		.reg_bits	= 8,
+		.val_bits	= 8,
+		.rd_table	= &adxl314_readable_regs_table,
+		.wr_table	= &adxl314_writable_regs_table,
+		.max_register	= 0x39,
+		/* Setting bits 7 and 6 enables multiple-byte read */
+		.read_flag_mask	= BIT(7) | BIT(6),
+	},
+};
+
+static int adxl313_spi_setup(struct device *dev, struct regmap *regmap)
+{
+	struct spi_device *spi = container_of(dev, struct spi_device, dev);
+	int ret;
+
+	if (spi->mode & SPI_3WIRE) {
+		ret = regmap_write(regmap, ADXL313_REG_DATA_FORMAT,
+				   ADXL313_SPI_3WIRE);
+		if (ret)
+			return ret;
+	}
+
+	return regmap_update_bits(regmap, ADXL313_REG_POWER_CTL,
+				  ADXL313_I2C_DISABLE, ADXL313_I2C_DISABLE);
+}
+
+static int adxl313_spi_probe(struct spi_device *spi)
+{
+	const struct adxl313_chip_info *chip_data;
+	struct regmap *regmap;
+	int ret;
+
+	spi->mode |= SPI_MODE_3;
+	ret = spi_setup(spi);
+	if (ret)
+		return ret;
+
+	/*
+	 * Retrieves device specific data as a pointer to a
+	 * adxl313_chip_info structure
+	 */
+	chip_data = device_get_match_data(&spi->dev);
+	if (!chip_data)
+		chip_data = (const struct adxl313_chip_info *)spi_get_device_id(spi)->driver_data;
+
+	regmap = devm_regmap_init_spi(spi,
+				      &adxl31x_spi_regmap_config[chip_data->type]);
+
+	if (IS_ERR(regmap)) {
+		dev_err(&spi->dev, "Error initializing spi regmap: %ld\n",
+			PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
+
+	return adxl313_core_probe(&spi->dev, regmap,
+				  chip_data, &adxl313_spi_setup);
+}
+
+static const struct spi_device_id adxl313_spi_id[] = {
+	{ .name = "adxl312", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL312] },
+	{ .name = "adxl313", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL313] },
+	{ .name = "adxl314", .driver_data = (kernel_ulong_t)&adxl31x_chip_info[ADXL314] },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(spi, adxl313_spi_id);
+
+static const struct of_device_id adxl313_of_match[] = {
+	{ .compatible = "adi,adxl312", .data = &adxl31x_chip_info[ADXL312] },
+	{ .compatible = "adi,adxl313", .data = &adxl31x_chip_info[ADXL313] },
+	{ .compatible = "adi,adxl314", .data = &adxl31x_chip_info[ADXL314] },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(of, adxl313_of_match);
+
+static struct spi_driver adxl313_spi_driver = {
+	.driver = {
+		.name	= "adxl313_spi",
+		.of_match_table = adxl313_of_match,
+	},
+	.probe		= adxl313_spi_probe,
+	.id_table	= adxl313_spi_id,
+};
+
+module_spi_driver(adxl313_spi_driver);
+
+MODULE_AUTHOR("Lucas Stankus <lucas.p.stankus@gmail.com>");
+MODULE_DESCRIPTION("ADXL313 3-Axis Digital Accelerometer SPI driver");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_ADXL313);