Input: add CMA3000 accelerometer driver
Add support for CMA3000 Tri-axis accelerometer, which supports Motion
detect, Measurement and Free fall modes. CMA3000 supports both I2C/SPI
bus for communication, currently the driver supports I2C based
communication.
Signed-off-by: Hemanth V <hemanthv@ti.com>
Reviewed-by: Jonathan Cameron <jic23@cam.ac.uk>
Reviewed-by: Sergio Aguirre <saaguirre@ti.com>
Reviewed-by: Shubhrajyoti <Shubhrajyoti@ti.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/misc/cma3000_d0x_i2c.c b/drivers/input/misc/cma3000_d0x_i2c.c
new file mode 100644
index 0000000..c52d278
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x_i2c.c
@@ -0,0 +1,141 @@
+/*
+ * Implements I2C interface for VTI CMA300_D0x Accelerometer driver
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Hemanth V <hemanthv@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/input/cma3000.h>
+#include "cma3000_d0x.h"
+
+static int cma3000_i2c_set(struct device *dev,
+ u8 reg, u8 val, char *msg)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_smbus_write_byte_data(client, reg, val);
+ if (ret < 0)
+ dev_err(&client->dev,
+ "%s failed (%s, %d)\n", __func__, msg, ret);
+ return ret;
+}
+
+static int cma3000_i2c_read(struct device *dev, u8 reg, char *msg)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(client, reg);
+ if (ret < 0)
+ dev_err(&client->dev,
+ "%s failed (%s, %d)\n", __func__, msg, ret);
+ return ret;
+}
+
+static const struct cma3000_bus_ops cma3000_i2c_bops = {
+ .bustype = BUS_I2C,
+#define CMA3000_BUSI2C (0 << 4)
+ .ctrl_mod = CMA3000_BUSI2C,
+ .read = cma3000_i2c_read,
+ .write = cma3000_i2c_set,
+};
+
+static int __devinit cma3000_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct cma3000_accl_data *data;
+
+ data = cma3000_init(&client->dev, client->irq, &cma3000_i2c_bops);
+ if (IS_ERR(data))
+ return PTR_ERR(data);
+
+ i2c_set_clientdata(client, data);
+
+ return 0;
+}
+
+static int __devexit cma3000_i2c_remove(struct i2c_client *client)
+{
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ cma3000_exit(data);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int cma3000_i2c_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ cma3000_suspend(data);
+
+ return 0;
+}
+
+static int cma3000_i2c_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct cma3000_accl_data *data = i2c_get_clientdata(client);
+
+ cma3000_resume(data);
+
+ return 0;
+}
+
+static const struct dev_pm_ops cma3000_i2c_pm_ops = {
+ .suspend = cma3000_i2c_suspend,
+ .resume = cma3000_i2c_resume,
+};
+#endif
+
+static const struct i2c_device_id cma3000_i2c_id[] = {
+ { "cma3000_d01", 0 },
+ { },
+};
+
+static struct i2c_driver cma3000_i2c_driver = {
+ .probe = cma3000_i2c_probe,
+ .remove = __devexit_p(cma3000_i2c_remove),
+ .id_table = cma3000_i2c_id,
+ .driver = {
+ .name = "cma3000_i2c_accl",
+ .owner = THIS_MODULE,
+#ifdef CONFIG_PM
+ .pm = &cma3000_i2c_pm_ops,
+#endif
+ },
+};
+
+static int __init cma3000_i2c_init(void)
+{
+ return i2c_add_driver(&cma3000_i2c_driver);
+}
+
+static void __exit cma3000_i2c_exit(void)
+{
+ i2c_del_driver(&cma3000_i2c_driver);
+}
+
+module_init(cma3000_i2c_init);
+module_exit(cma3000_i2c_exit);
+
+MODULE_DESCRIPTION("CMA3000-D0x Accelerometer I2C Driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Hemanth V <hemanthv@ti.com>");