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Diffstat (limited to 'drivers/iio/humidity/hts221_i2c.c')
-rw-r--r--drivers/iio/humidity/hts221_i2c.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/iio/humidity/hts221_i2c.c b/drivers/iio/humidity/hts221_i2c.c
new file mode 100644
index 000000000..afbc611f7
--- /dev/null
+++ b/drivers/iio/humidity/hts221_i2c.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * STMicroelectronics hts221 i2c driver
+ *
+ * Copyright 2016 STMicroelectronics Inc.
+ *
+ * Lorenzo Bianconi <lorenzo.bianconi@st.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "hts221.h"
+
+#define HTS221_I2C_AUTO_INCREMENT BIT(7)
+
+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)
+{
+ struct regmap *regmap;
+
+ 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(&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 = pm_sleep_ptr(&hts221_pm_ops),
+ .of_match_table = hts221_i2c_of_match,
+ .acpi_match_table = ACPI_PTR(hts221_acpi_match),
+ },
+ .probe = hts221_i2c_probe,
+ .id_table = hts221_i2c_id_table,
+};
+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);