1 files changed, 27 insertions, 70 deletions

diff --git a/drivers/iio/humidity/hts221_i2c.c b/drivers/iio/humidity/hts221_i2c.c
index f38e4b7e0160..cbaa7d1af6c4 100644
--- a/drivers/iio/humidity/hts221_i2c.c
+++ b/drivers/iio/humidity/hts221_i2c.c
@@ -1,113 +1,69 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * STMicroelectronics hts221 i2c driver
  *
  * Copyright 2016 STMicroelectronics Inc.
  *
  * Lorenzo Bianconi <lorenzo.bianconi@st.com>
- *
- * Licensed under the GPL-2.
  */
 
 #include <linux/kernel.h>
 #include <linux/module.h>
-#include <linux/acpi.h>
+#include <linux/mod_devicetable.h>
 #include <linux/i2c.h>
 #include <linux/slab.h>
-#include "hts221.h"
-
-#define I2C_AUTO_INCREMENT	0x80
-
-static int hts221_i2c_read(struct device *dev, u8 addr, int len, u8 *data)
-{
-	struct i2c_msg msg[2];
-	struct i2c_client *client = to_i2c_client(dev);
-
-	if (len > 1)
-		addr |= I2C_AUTO_INCREMENT;
-
-	msg[0].addr = client->addr;
-	msg[0].flags = client->flags;
-	msg[0].len = 1;
-	msg[0].buf = &addr;
-
-	msg[1].addr = client->addr;
-	msg[1].flags = client->flags | I2C_M_RD;
-	msg[1].len = len;
-	msg[1].buf = data;
-
-	return i2c_transfer(client->adapter, msg, 2);
-}
-
-static int hts221_i2c_write(struct device *dev, u8 addr, int len, u8 *data)
-{
-	u8 send[len + 1];
-	struct i2c_msg msg;
-	struct i2c_client *client = to_i2c_client(dev);
-
-	if (len > 1)
-		addr |= I2C_AUTO_INCREMENT;
-
-	send[0] = addr;
-	memcpy(&send[1], data, len * sizeof(u8));
+#include <linux/regmap.h>
 
-	msg.addr = client->addr;
-	msg.flags = client->flags;
-	msg.len = len + 1;
-	msg.buf = send;
+#include "hts221.h"
 
-	return i2c_transfer(client->adapter, &msg, 1);
-}
+#define HTS221_I2C_AUTO_INCREMENT	BIT(7)
 
-static const struct hts221_transfer_function hts221_transfer_fn = {
-	.read = hts221_i2c_read,
-	.write = hts221_i2c_write,
+static const struct regmap_config hts221_i2c_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.write_flag_mask = HTS221_I2C_AUTO_INCREMENT,
+	.read_flag_mask = HTS221_I2C_AUTO_INCREMENT,
 };
 
-static int hts221_i2c_probe(struct i2c_client *client,
-			    const struct i2c_device_id *id)
+static int hts221_i2c_probe(struct i2c_client *client)
 {
-	struct hts221_hw *hw;
-	struct iio_dev *iio_dev;
-
-	iio_dev = devm_iio_device_alloc(&client->dev, sizeof(*hw));
-	if (!iio_dev)
-		return -ENOMEM;
-
-	i2c_set_clientdata(client, iio_dev);
+	struct regmap *regmap;
 
-	hw = iio_priv(iio_dev);
-	hw->name = client->name;
-	hw->dev = &client->dev;
-	hw->irq = client->irq;
-	hw->tf = &hts221_transfer_fn;
+	regmap = devm_regmap_init_i2c(client, &hts221_i2c_regmap_config);
+	if (IS_ERR(regmap)) {
+		dev_err(&client->dev, "Failed to register i2c regmap %ld\n",
+			PTR_ERR(regmap));
+		return PTR_ERR(regmap);
+	}
 
-	return hts221_probe(iio_dev);
+	return hts221_probe(&client->dev, client->irq,
+			    client->name, regmap);
 }
 
 static const struct acpi_device_id hts221_acpi_match[] = {
 	{"SMO9100", 0},
-	{ },
+	{ }
 };
 MODULE_DEVICE_TABLE(acpi, hts221_acpi_match);
 
 static const struct of_device_id hts221_i2c_of_match[] = {
 	{ .compatible = "st,hts221", },
-	{},
+	{ }
 };
 MODULE_DEVICE_TABLE(of, hts221_i2c_of_match);
 
 static const struct i2c_device_id hts221_i2c_id_table[] = {
 	{ HTS221_DEV_NAME },
-	{},
+	{ }
 };
 MODULE_DEVICE_TABLE(i2c, hts221_i2c_id_table);
 
 static struct i2c_driver hts221_driver = {
 	.driver = {
 		.name = "hts221_i2c",
-		.pm = &hts221_pm_ops,
-		.of_match_table = of_match_ptr(hts221_i2c_of_match),
-		.acpi_match_table = ACPI_PTR(hts221_acpi_match),
+		.pm = pm_sleep_ptr(&hts221_pm_ops),
+		.of_match_table = hts221_i2c_of_match,
+		.acpi_match_table = hts221_acpi_match,
 	},
 	.probe = hts221_i2c_probe,
 	.id_table = hts221_i2c_id_table,
@@ -117,3 +73,4 @@ module_i2c_driver(hts221_driver);
 MODULE_AUTHOR("Lorenzo Bianconi <lorenzo.bianconi@st.com>");
 MODULE_DESCRIPTION("STMicroelectronics hts221 i2c driver");
 MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS("IIO_HTS221");