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Diffstat (limited to 'drivers/iio/pressure/zpa2326_i2c.c')
-rw-r--r--drivers/iio/pressure/zpa2326_i2c.c88
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/iio/pressure/zpa2326_i2c.c b/drivers/iio/pressure/zpa2326_i2c.c
new file mode 100644
index 0000000000..c7fffbe7c7
--- /dev/null
+++ b/drivers/iio/pressure/zpa2326_i2c.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Murata ZPA2326 I2C pressure and temperature sensor driver
+ *
+ * Copyright (c) 2016 Parrot S.A.
+ *
+ * Author: Gregor Boirie <gregor.boirie@parrot.com>
+ */
+
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include "zpa2326.h"
+
+/*
+ * read_flag_mask:
+ * - address bit 7 must be set to request a register read operation
+ */
+static const struct regmap_config zpa2326_regmap_i2c_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .writeable_reg = zpa2326_isreg_writeable,
+ .readable_reg = zpa2326_isreg_readable,
+ .precious_reg = zpa2326_isreg_precious,
+ .max_register = ZPA2326_TEMP_OUT_H_REG,
+ .read_flag_mask = BIT(7),
+ .cache_type = REGCACHE_NONE,
+};
+
+static unsigned int zpa2326_i2c_hwid(const struct i2c_client *client)
+{
+#define ZPA2326_SA0(_addr) (_addr & BIT(0))
+#define ZPA2326_DEVICE_ID_SA0_SHIFT (1)
+
+ /* Identification register bit 1 mirrors device address bit 0. */
+ return (ZPA2326_DEVICE_ID |
+ (ZPA2326_SA0(client->addr) << ZPA2326_DEVICE_ID_SA0_SHIFT));
+}
+
+static int zpa2326_probe_i2c(struct i2c_client *client)
+{
+ const struct i2c_device_id *i2c_id = i2c_client_get_device_id(client);
+ struct regmap *regmap;
+
+ regmap = devm_regmap_init_i2c(client, &zpa2326_regmap_i2c_config);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "failed to init registers map");
+ return PTR_ERR(regmap);
+ }
+
+ return zpa2326_probe(&client->dev, i2c_id->name, client->irq,
+ zpa2326_i2c_hwid(client), regmap);
+}
+
+static void zpa2326_remove_i2c(struct i2c_client *client)
+{
+ zpa2326_remove(&client->dev);
+}
+
+static const struct i2c_device_id zpa2326_i2c_ids[] = {
+ { "zpa2326", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, zpa2326_i2c_ids);
+
+static const struct of_device_id zpa2326_i2c_matches[] = {
+ { .compatible = "murata,zpa2326" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, zpa2326_i2c_matches);
+
+static struct i2c_driver zpa2326_i2c_driver = {
+ .driver = {
+ .name = "zpa2326-i2c",
+ .of_match_table = zpa2326_i2c_matches,
+ .pm = ZPA2326_PM_OPS,
+ },
+ .probe = zpa2326_probe_i2c,
+ .remove = zpa2326_remove_i2c,
+ .id_table = zpa2326_i2c_ids,
+};
+module_i2c_driver(zpa2326_i2c_driver);
+
+MODULE_AUTHOR("Gregor Boirie <gregor.boirie@parrot.com>");
+MODULE_DESCRIPTION("I2C driver for Murata ZPA2326 pressure sensor");
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(IIO_ZPA2326);