Merge tag 'v2.6.38' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6

[mv-sheeva.git] / drivers / input / misc / cma3000_d0x_i2c.c

diff --git a/drivers/input/misc/cma3000_d0x_i2c.c b/drivers/input/misc/cma3000_d0x_i2c.c
new file mode 100644 (file)
index 0000000..d100cc5
--- /dev/null
+++ b/drivers/input/misc/cma3000_d0x_i2c.c
@@ -0,0 +1,143 @@
+/*
+ * 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 },
+       { },
+};
+
+MODULE_DEVICE_TABLE(i2c, cma3000_i2c_id);
+
+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>");