Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / input / misc / adxl34x-i2c.c

diff --git a/kernel/drivers/input/misc/adxl34x-i2c.c b/kernel/drivers/input/misc/adxl34x-i2c.c
new file mode 100644 (file)
index 0000000..470bfd6
--- /dev/null
+++ b/kernel/drivers/input/misc/adxl34x-i2c.c
@@ -0,0 +1,153 @@
+/*
+ * ADLX345/346 Three-Axis Digital Accelerometers (I2C Interface)
+ *
+ * Enter bugs at http://blackfin.uclinux.org/
+ *
+ * Copyright (C) 2009 Michael Hennerich, Analog Devices Inc.
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/input.h>       /* BUS_I2C */
+#include <linux/i2c.h>
+#include <linux/module.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 int adxl34x_i2c_remove(struct i2c_client *client)
+{
+       struct adxl34x *ac = i2c_get_clientdata(client);
+
+       return 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 struct i2c_driver adxl34x_driver = {
+       .driver = {
+               .name = "adxl34x",
+               .owner = THIS_MODULE,
+               .pm = &adxl34x_i2c_pm,
+       },
+       .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");