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Diffstat (limited to 'drivers/iio/pressure/mprls0025pa_i2c.c')
-rw-r--r--drivers/iio/pressure/mprls0025pa_i2c.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/drivers/iio/pressure/mprls0025pa_i2c.c b/drivers/iio/pressure/mprls0025pa_i2c.c
new file mode 100644
index 0000000000..7a5c5aa2b4
--- /dev/null
+++ b/drivers/iio/pressure/mprls0025pa_i2c.c
@@ -0,0 +1,100 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MPRLS0025PA - Honeywell MicroPressure pressure sensor series driver
+ *
+ * Copyright (c) Andreas Klinger <ak@it-klinger.de>
+ *
+ * Data sheet:
+ * https://prod-edam.honeywell.com/content/dam/honeywell-edam/sps/siot/en-us/products/sensors/pressure-sensors/board-mount-pressure-sensors/micropressure-mpr-series/documents/sps-siot-mpr-series-datasheet-32332628-ciid-172626.pdf
+ */
+
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/types.h>
+
+#include "mprls0025pa.h"
+
+static int mpr_i2c_init(struct device *unused)
+{
+ return 0;
+}
+
+static int mpr_i2c_read(struct mpr_data *data, const u8 unused, const u8 cnt)
+{
+ int ret;
+ struct i2c_client *client = to_i2c_client(data->dev);
+
+ if (cnt > MPR_MEASUREMENT_RD_SIZE)
+ return -EOVERFLOW;
+
+ memset(data->buffer, 0, MPR_MEASUREMENT_RD_SIZE);
+ ret = i2c_master_recv(client, data->buffer, cnt);
+ if (ret < 0)
+ return ret;
+ else if (ret != cnt)
+ return -EIO;
+
+ return 0;
+}
+
+static int mpr_i2c_write(struct mpr_data *data, const u8 cmd, const u8 unused)
+{
+ int ret;
+ struct i2c_client *client = to_i2c_client(data->dev);
+ u8 wdata[MPR_PKT_SYNC_LEN];
+
+ memset(wdata, 0, sizeof(wdata));
+ wdata[0] = cmd;
+
+ ret = i2c_master_send(client, wdata, MPR_PKT_SYNC_LEN);
+ if (ret < 0)
+ return ret;
+ else if (ret != MPR_PKT_SYNC_LEN)
+ return -EIO;
+
+ return 0;
+}
+
+static const struct mpr_ops mpr_i2c_ops = {
+ .init = mpr_i2c_init,
+ .read = mpr_i2c_read,
+ .write = mpr_i2c_write,
+};
+
+static int mpr_i2c_probe(struct i2c_client *client)
+{
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_BYTE))
+ return -EOPNOTSUPP;
+
+ return mpr_common_probe(&client->dev, &mpr_i2c_ops, client->irq);
+}
+
+static const struct of_device_id mpr_i2c_match[] = {
+ { .compatible = "honeywell,mprls0025pa" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, mpr_i2c_match);
+
+static const struct i2c_device_id mpr_i2c_id[] = {
+ { "mprls0025pa" },
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, mpr_i2c_id);
+
+static struct i2c_driver mpr_i2c_driver = {
+ .probe = mpr_i2c_probe,
+ .id_table = mpr_i2c_id,
+ .driver = {
+ .name = "mprls0025pa",
+ .of_match_table = mpr_i2c_match,
+ },
+};
+module_i2c_driver(mpr_i2c_driver);
+
+MODULE_AUTHOR("Andreas Klinger <ak@it-klinger.de>");
+MODULE_DESCRIPTION("Honeywell MPR pressure sensor i2c driver");
+MODULE_LICENSE("GPL");
+MODULE_IMPORT_NS(IIO_HONEYWELL_MPRLS0025PA);