1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/iio/dac/ad5446-i2c.c b/drivers/iio/dac/ad5446-i2c.c
new file mode 100644
index 000000000000..40fe7e17fce4
--- /dev/null
+++ b/drivers/iio/dac/ad5446-i2c.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AD5446 SPI I2C driver
+ *
+ * Copyright 2025 Analog Devices Inc.
+ */
+#include <linux/err.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+
+#include <asm/byteorder.h>
+
+#include "ad5446.h"
+
+static int ad5622_write(struct ad5446_state *st, unsigned int val)
+{
+	struct i2c_client *client = to_i2c_client(st->dev);
+	int ret;
+
+	st->d16 = cpu_to_be16(val);
+
+	ret = i2c_master_send_dmasafe(client, (char *)&st->d16, sizeof(st->d16));
+	if (ret < 0)
+		return ret;
+	if (ret != sizeof(st->d16))
+		return -EIO;
+
+	return 0;
+}
+
+static int ad5446_i2c_probe(struct i2c_client *i2c)
+{
+	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
+	const struct ad5446_chip_info *chip_info;
+
+	chip_info = i2c_get_match_data(i2c);
+	if (!chip_info)
+		return -ENODEV;
+
+	return ad5446_probe(&i2c->dev, id->name, chip_info);
+}
+
+/*
+ * ad5446_supported_i2c_device_ids:
+ * The AD5620/40/60 parts are available in different fixed internal reference
+ * voltage options. The actual part numbers may look differently
+ * (and a bit cryptic), however this style is used to make clear which
+ * parts are supported here.
+ */
+
+static const struct ad5446_chip_info ad5602_chip_info = {
+	.channel = AD5446_CHANNEL_POWERDOWN(8, 16, 4),
+	.write = ad5622_write,
+};
+
+static const struct ad5446_chip_info ad5612_chip_info = {
+	.channel = AD5446_CHANNEL_POWERDOWN(10, 16, 2),
+	.write = ad5622_write,
+};
+
+static const struct ad5446_chip_info ad5622_chip_info = {
+	.channel = AD5446_CHANNEL_POWERDOWN(12, 16, 0),
+	.write = ad5622_write,
+};
+
+static const struct i2c_device_id ad5446_i2c_ids[] = {
+	{"ad5301", (kernel_ulong_t)&ad5602_chip_info},
+	{"ad5311", (kernel_ulong_t)&ad5612_chip_info},
+	{"ad5321", (kernel_ulong_t)&ad5622_chip_info},
+	{"ad5602", (kernel_ulong_t)&ad5602_chip_info},
+	{"ad5612", (kernel_ulong_t)&ad5612_chip_info},
+	{"ad5622", (kernel_ulong_t)&ad5622_chip_info},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, ad5446_i2c_ids);
+
+static const struct of_device_id ad5446_i2c_of_ids[] = {
+	{ .compatible = "adi,ad5301", .data = &ad5602_chip_info },
+	{ .compatible = "adi,ad5311", .data = &ad5612_chip_info },
+	{ .compatible = "adi,ad5321", .data = &ad5622_chip_info },
+	{ .compatible = "adi,ad5602", .data = &ad5602_chip_info },
+	{ .compatible = "adi,ad5612", .data = &ad5612_chip_info },
+	{ .compatible = "adi,ad5622", .data = &ad5622_chip_info },
+	{ }
+};
+MODULE_DEVICE_TABLE(OF, ad5446_i2c_of_ids);
+
+static struct i2c_driver ad5446_i2c_driver = {
+	.driver = {
+		.name	= "ad5446",
+		.of_match_table = ad5446_i2c_of_ids,
+	},
+	.probe = ad5446_i2c_probe,
+	.id_table = ad5446_i2c_ids,
+};
+module_i2c_driver(ad5446_i2c_driver);
+
+MODULE_AUTHOR("Nuno Sá <nuno.sa@analog.com>");
+MODULE_DESCRIPTION("Analog Devices AD5622 and similar I2C DACs");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS("IIO_AD5446");