From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kalhan Trisal Date: Fri, 14 Aug 2009 14:22:32 +0000 Subject: Re: [lm-sensors] Accelerometer driver Message-Id: <20090815010030.GA15449@intel.com> List-Id: References: <20090811184948.GA32002@intel.com> In-Reply-To: <20090811184948.GA32002@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lm-sensors@vger.kernel.org >From f63c311f0106f6fbcced05b168cf60f996621e47 Mon Sep 17 00:00:00 2001 From: Kalhan Trisal Date: Fri, 14 Aug 2009 20:44:56 -0400 Subject: [PATCH] STMicroeletronics-LIS331DL-three-axis-digital-accelrometer submitting the patch with comments incorporated. This driver provides support for the LIS3331DL accelerometer accelerometer, connected to I2C. The accelerometer data is readable via sys/class/hwmon. Signed-off-by: Kalhan Trisal --- drivers/hwmon/Kconfig | 8 ++ drivers/hwmon/Makefile | 1 + drivers/hwmon/lis331dl.c | 250 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 259 insertions(+), 0 deletions(-) create mode 100644 drivers/hwmon/lis331dl.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 2d50166..394a591 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -1017,6 +1017,14 @@ config SENSORS_APPLESMC Say Y here if you have an applicable laptop and want to experience the awesome power of applesmc. +config SENSORS_LIS331DL + tristate "STMicroeletronics LIS331DL three-axis digital accelerometer" + depends on I2C + help + If you say yes here you get support for the Accelerometer Devices + Device can be configured using sysfs. + x y Z data can be accessible via sysfs. + config HWMON_DEBUG_CHIP bool "Hardware Monitoring Chip debugging messages" default n diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index b793dce..3b1e424 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -89,6 +89,7 @@ obj-$(CONFIG_SENSORS_VT8231) += vt8231.o obj-$(CONFIG_SENSORS_W83627EHF) += w83627ehf.o obj-$(CONFIG_SENSORS_W83L785TS) += w83l785ts.o obj-$(CONFIG_SENSORS_W83L786NG) += w83l786ng.o +obj-$(CONFIG_SENSORS_LIS331DL) += lis331dl.o ifeq ($(CONFIG_HWMON_DEBUG_CHIP),y) EXTRA_CFLAGS += -DDEBUG diff --git a/drivers/hwmon/lis331dl.c b/drivers/hwmon/lis331dl.c new file mode 100644 index 0000000..c8d6b84 --- /dev/null +++ b/drivers/hwmon/lis331dl.c @@ -0,0 +1,250 @@ +/* + * lis331dl.c - ST LIS331DL Accelerometer 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + +MODULE_AUTHOR("Kalhan Trisal update_lock); + if (val = ACCEL_DATA_RATE_100HZ) + set_val = (ret_val & 0x7F); /* setting the 8th bit to 0 */ + else if (val = ACCEL_DATA_RATE_400HZ) + set_val = (ret_val | (1 << 7)); + else + goto invarg; + + i2c_smbus_write_byte_data(client, 0x20, set_val); + mutex_unlock(&data->update_lock); + return count; +invarg: + mutex_unlock(&data->update_lock); + return -EINVAL; +} + +static ssize_t state_store(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + struct i2c_client *client = to_i2c_client(dev); + struct lis331dl_data *data = i2c_get_clientdata(client); + unsigned int ret_val, set_val; + unsigned long val; + + if (strict_strtoul(buf, 10, &val)) + return -EINVAL; + + mutex_lock(&data->update_lock); + ret_val = i2c_smbus_read_byte_data(client, 0x20); + if (val = ACCEL_POWER_MODE_DOWN) + set_val = ret_val & 0xBF; /* if value id 0 */ + else if (val = ACCEL_POWER_MODE_ACTIVE) + set_val = (ret_val | (1<<6)); /* if value is 1 */ + else + goto invarg; + + i2c_smbus_write_byte_data(client, 0x20, set_val); + mutex_unlock(&data->update_lock); + return count; +invarg: + mutex_unlock(&data->update_lock); + return -EINVAL; +} + +static DEVICE_ATTR(data_rate, S_IRUGO | S_IWUSR, rate_show, rate_store); +static DEVICE_ATTR(power_state, S_IRUGO | S_IWUSR, state_show, state_store); +static DEVICE_ATTR(position, S_IRUGO, xyz_pos_show, NULL); + +static struct attribute *lis331dl_attr[] = { + &dev_attr_data_rate.attr, + &dev_attr_power_state.attr, + &dev_attr_position.attr, + NULL +}; + +static struct attribute_group lis331dl_gr = { + .attrs = lis331dl_attr +}; + +static void accel_set_default_config(struct i2c_client *client) +{ + /* Device is configured in + * 100Hz output data rate 7 bit 0 + * active mode 6 bit 1 + * x,y,z axix enable 0,1,2 bits 1*/ + i2c_smbus_write_byte_data(client, 0x20, 0x47); +} + +static int lis331dl_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + int res; + struct lis331dl_data *data; + + data = kzalloc(sizeof(struct lis331dl_data), GFP_KERNEL); + if (data = NULL) { + printk(KERN_WARNING "lis331dl: Memory initi failed \n"); + return -ENOMEM; + } + mutex_init(&data->update_lock); + i2c_set_clientdata(client, data); + + res = sysfs_create_group(&client->dev.kobj, &lis331dl_gr); + if (res) { + printk(KERN_WARNING "lis331dl: Sysfs group failed!!\n"); + goto acclero_error1; + } + data->hwmon_dev = hwmon_device_register(&client->dev); + if (IS_ERR(data->hwmon_dev)) { + res = PTR_ERR(data->hwmon_dev); + data->hwmon_dev = NULL; + sysfs_remove_group(&client->dev.kobj, &lis331dl_gr); + printk(KERN_WARNING "lis331dl: unable to register \ + hwmon device\n"); + goto acclero_error1; + } + accel_set_default_config(client); + + dev_info(&client->dev, "%s lis331dl: Accelerometer chip \ + foundn", client->name); + return res; + +acclero_error1: + i2c_set_clientdata(client, NULL); + kfree(data); + return res; +} + +static int lis331dl_remove(struct i2c_client *client) +{ + struct lis331dl_data *data = i2c_get_clientdata(client); + + hwmon_device_unregister(data->hwmon_dev); + sysfs_remove_group(&client->dev.kobj, &lis331dl_gr); + kfree(data); + return 0; +} + +static struct i2c_device_id lis331dl_id[] = { + { "lis331dl", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(i2c, lis331dl_id); + +static struct i2c_driver lis331dl_driver = { + .driver = { + .name = "lis331dl", + }, + .probe = lis331dl_probe, + .remove = lis331dl_remove, + .id_table = lis331dl_id, +}; + +static int __init sensor_lis331dl_init(void) +{ + return i2c_add_driver(&lis331dl_driver); +} + +static void __exit sensor_lis331dl_exit(void) +{ + i2c_del_driver(&lis331dl_driver); +} + +module_init(sensor_lis331dl_init); +module_exit(sensor_lis331dl_exit); -- 1.6.0.6 _______________________________________________ lm-sensors mailing list lm-sensors@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/lm-sensors