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-rw-r--r--drivers/input/misc/adxl34x-i2c.c171
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/input/misc/adxl34x-i2c.c b/drivers/input/misc/adxl34x-i2c.c
new file mode 100644
index 000000000..5be636aaa
--- /dev/null
+++ b/drivers/input/misc/adxl34x-i2c.c
@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
+ */
+
+#include <linux/input.h> /* BUS_I2C */
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/types.h>
+#include <linux/pm.h>
+#include "adxl34x.h"
+
+static int adxl34x_smbus_read(struct device *dev, unsigned char reg)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ return i2c_smbus_read_byte_data(client, reg);
+}
+
+static int adxl34x_smbus_write(struct device *dev,
+ unsigned char reg, unsigned char val)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ return i2c_smbus_write_byte_data(client, reg, val);
+}
+
+static int adxl34x_smbus_read_block(struct device *dev,
+ unsigned char reg, int count,
+ void *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+
+ return i2c_smbus_read_i2c_block_data(client, reg, count, buf);
+}
+
+static int adxl34x_i2c_read_block(struct device *dev,
+ unsigned char reg, int count,
+ void *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_master_send(client, &reg, 1);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_master_recv(client, buf, count);
+ if (ret < 0)
+ return ret;
+
+ if (ret != count)
+ return -EIO;
+
+ return 0;
+}
+
+static const struct adxl34x_bus_ops adxl34x_smbus_bops = {
+ .bustype = BUS_I2C,
+ .write = adxl34x_smbus_write,
+ .read = adxl34x_smbus_read,
+ .read_block = adxl34x_smbus_read_block,
+};
+
+static const struct adxl34x_bus_ops adxl34x_i2c_bops = {
+ .bustype = BUS_I2C,
+ .write = adxl34x_smbus_write,
+ .read = adxl34x_smbus_read,
+ .read_block = adxl34x_i2c_read_block,
+};
+
+static int adxl34x_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct adxl34x *ac;
+ int error;
+
+ error = i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA);
+ if (!error) {
+ dev_err(&client->dev, "SMBUS Byte Data not Supported\n");
+ return -EIO;
+ }
+
+ ac = adxl34x_probe(&client->dev, client->irq, false,
+ i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_I2C_BLOCK) ?
+ &adxl34x_smbus_bops : &adxl34x_i2c_bops);
+ if (IS_ERR(ac))
+ return PTR_ERR(ac);
+
+ i2c_set_clientdata(client, ac);
+
+ return 0;
+}
+
+static void adxl34x_i2c_remove(struct i2c_client *client)
+{
+ struct adxl34x *ac = i2c_get_clientdata(client);
+
+ adxl34x_remove(ac);
+}
+
+static int __maybe_unused adxl34x_i2c_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adxl34x *ac = i2c_get_clientdata(client);
+
+ adxl34x_suspend(ac);
+
+ return 0;
+}
+
+static int __maybe_unused adxl34x_i2c_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct adxl34x *ac = i2c_get_clientdata(client);
+
+ adxl34x_resume(ac);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(adxl34x_i2c_pm, adxl34x_i2c_suspend,
+ adxl34x_i2c_resume);
+
+static const struct i2c_device_id adxl34x_id[] = {
+ { "adxl34x", 0 },
+ { }
+};
+
+MODULE_DEVICE_TABLE(i2c, adxl34x_id);
+
+static const struct of_device_id adxl34x_of_id[] = {
+ /*
+ * The ADXL346 is backward-compatible with the ADXL345. Differences are
+ * handled by runtime detection of the device model, there's thus no
+ * need for listing the "adi,adxl346" compatible value explicitly.
+ */
+ { .compatible = "adi,adxl345", },
+ /*
+ * Deprecated, DT nodes should use one or more of the device-specific
+ * compatible values "adi,adxl345" and "adi,adxl346".
+ */
+ { .compatible = "adi,adxl34x", },
+ { }
+};
+
+MODULE_DEVICE_TABLE(of, adxl34x_of_id);
+
+static struct i2c_driver adxl34x_driver = {
+ .driver = {
+ .name = "adxl34x",
+ .pm = &adxl34x_i2c_pm,
+ .of_match_table = adxl34x_of_id,
+ },
+ .probe = adxl34x_i2c_probe,
+ .remove = adxl34x_i2c_remove,
+ .id_table = adxl34x_id,
+};
+
+module_i2c_driver(adxl34x_driver);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("ADXL345/346 Three-Axis Digital Accelerometer I2C Bus Driver");
+MODULE_LICENSE("GPL");