diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/misc/hmc6352.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/misc/hmc6352.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/ANDROID_3.4.5/drivers/misc/hmc6352.c b/ANDROID_3.4.5/drivers/misc/hmc6352.c deleted file mode 100644 index 423cd40f..00000000 --- a/ANDROID_3.4.5/drivers/misc/hmc6352.c +++ /dev/null @@ -1,155 +0,0 @@ -/* - * hmc6352.c - Honeywell Compass Driver - * - * Copyright (C) 2009 Intel Corp - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * 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, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - */ - -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/i2c.h> -#include <linux/err.h> -#include <linux/delay.h> -#include <linux/sysfs.h> - -static DEFINE_MUTEX(compass_mutex); - -static int compass_command(struct i2c_client *c, u8 cmd) -{ - int ret = i2c_master_send(c, &cmd, 1); - if (ret < 0) - dev_warn(&c->dev, "command '%c' failed.\n", cmd); - return ret; -} - -static int compass_store(struct device *dev, const char *buf, size_t count, - const char *map) -{ - struct i2c_client *c = to_i2c_client(dev); - int ret; - unsigned long val; - - if (strict_strtoul(buf, 10, &val)) - return -EINVAL; - if (val >= strlen(map)) - return -EINVAL; - mutex_lock(&compass_mutex); - ret = compass_command(c, map[val]); - mutex_unlock(&compass_mutex); - if (ret < 0) - return ret; - return count; -} - -static ssize_t compass_calibration_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - return compass_store(dev, buf, count, "EC"); -} - -static ssize_t compass_power_mode_store(struct device *dev, - struct device_attribute *attr, const char *buf, size_t count) -{ - return compass_store(dev, buf, count, "SW"); -} - -static ssize_t compass_heading_data_show(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct i2c_client *client = to_i2c_client(dev); - unsigned char i2c_data[2]; - int ret; - - mutex_lock(&compass_mutex); - ret = compass_command(client, 'A'); - if (ret != 1) { - mutex_unlock(&compass_mutex); - return ret; - } - msleep(10); /* sending 'A' cmd we need to wait for 7-10 millisecs */ - ret = i2c_master_recv(client, i2c_data, 2); - mutex_unlock(&compass_mutex); - if (ret < 0) { - dev_warn(dev, "i2c read data cmd failed\n"); - return ret; - } - ret = (i2c_data[0] << 8) | i2c_data[1]; - return sprintf(buf, "%d.%d\n", ret/10, ret%10); -} - - -static DEVICE_ATTR(heading0_input, S_IRUGO, compass_heading_data_show, NULL); -static DEVICE_ATTR(calibration, S_IWUSR, NULL, compass_calibration_store); -static DEVICE_ATTR(power_state, S_IWUSR, NULL, compass_power_mode_store); - -static struct attribute *mid_att_compass[] = { - &dev_attr_heading0_input.attr, - &dev_attr_calibration.attr, - &dev_attr_power_state.attr, - NULL -}; - -static const struct attribute_group m_compass_gr = { - .name = "hmc6352", - .attrs = mid_att_compass -}; - -static int hmc6352_probe(struct i2c_client *client, - const struct i2c_device_id *id) -{ - int res; - - res = sysfs_create_group(&client->dev.kobj, &m_compass_gr); - if (res) { - dev_err(&client->dev, "device_create_file failed\n"); - return res; - } - dev_info(&client->dev, "%s HMC6352 compass chip found\n", - client->name); - return 0; -} - -static int hmc6352_remove(struct i2c_client *client) -{ - sysfs_remove_group(&client->dev.kobj, &m_compass_gr); - return 0; -} - -static struct i2c_device_id hmc6352_id[] = { - { "hmc6352", 0 }, - { } -}; - -MODULE_DEVICE_TABLE(i2c, hmc6352_id); - -static struct i2c_driver hmc6352_driver = { - .driver = { - .name = "hmc6352", - }, - .probe = hmc6352_probe, - .remove = hmc6352_remove, - .id_table = hmc6352_id, -}; - -module_i2c_driver(hmc6352_driver); - -MODULE_AUTHOR("Kalhan Trisal <kalhan.trisal@intel.com"); -MODULE_DESCRIPTION("hmc6352 Compass Driver"); -MODULE_LICENSE("GPL v2"); |