hwmon: I2C bus support for lis3lv02d and variant accelerometer chips
Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Cc: Éric Piel <eric.piel@tremplin-utc.net> Cc: Kalhan Trisal <kalhan.trisal@intel.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Samu Onkalo
Linus Torvalds
parent
ec8e2f7466
commit
312ea07bf0
3 changed files with 201 additions and 0 deletions
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@ -998,6 +998,23 @@ config SENSORS_LIS3_SPI
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will be called lis3lv02d and a specific module for the SPI transport
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is called lis3lv02d_spi.
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config SENSORS_LIS3_I2C
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tristate "STMicroeletronics LIS3LV02Dx three-axis digital accelerometer (I2C)"
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depends on I2C && INPUT
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select INPUT_POLLDEV
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default n
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help
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This driver provides support for the LIS3LV02Dx accelerometer connected
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via I2C. The accelerometer data is readable via
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/sys/devices/platform/lis3lv02d.
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This driver also provides an absolute input class device, allowing
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the device to act as a pinball machine-esque joystick.
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This driver can also be built as modules. If so, the core module
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will be called lis3lv02d and a specific module for the I2C transport
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is called lis3lv02d_i2c.
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config SENSORS_APPLESMC
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tristate "Apple SMC (Motion sensor, light sensor, keyboard backlight)"
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depends on INPUT && X86
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@ -55,6 +55,7 @@ obj-$(CONFIG_SENSORS_IT87) += it87.o
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obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
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obj-$(CONFIG_SENSORS_LIS3LV02D) += lis3lv02d.o hp_accel.o
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obj-$(CONFIG_SENSORS_LIS3_SPI) += lis3lv02d.o lis3lv02d_spi.o
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obj-$(CONFIG_SENSORS_LIS3_I2C) += lis3lv02d.o lis3lv02d_i2c.o
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obj-$(CONFIG_SENSORS_LM63) += lm63.o
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obj-$(CONFIG_SENSORS_LM70) += lm70.o
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obj-$(CONFIG_SENSORS_LM73) += lm73.o
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183
drivers/hwmon/lis3lv02d_i2c.c
Normal file
183
drivers/hwmon/lis3lv02d_i2c.c
Normal file
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@ -0,0 +1,183 @@
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/*
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* drivers/hwmon/lis3lv02d_i2c.c
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*
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* Implements I2C interface for lis3lv02d (STMicroelectronics) accelerometer.
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* Driver is based on corresponding SPI driver written by Daniel Mack
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* (lis3lv02d_spi.c (C) 2009 Daniel Mack <daniel@caiaq.de> ).
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*
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* Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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*
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* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include "lis3lv02d.h"
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#define DRV_NAME "lis3lv02d_i2c"
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static inline s32 lis3_i2c_write(struct lis3lv02d *lis3, int reg, u8 value)
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{
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struct i2c_client *c = lis3->bus_priv;
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return i2c_smbus_write_byte_data(c, reg, value);
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}
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static inline s32 lis3_i2c_read(struct lis3lv02d *lis3, int reg, u8 *v)
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{
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struct i2c_client *c = lis3->bus_priv;
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*v = i2c_smbus_read_byte_data(c, reg);
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return 0;
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}
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static int lis3_i2c_init(struct lis3lv02d *lis3)
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{
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u8 reg;
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int ret;
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/* power up the device */
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ret = lis3->read(lis3, CTRL_REG1, ®);
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if (ret < 0)
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return ret;
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reg |= CTRL1_PD0;
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return lis3->write(lis3, CTRL_REG1, reg);
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}
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/* Default axis mapping but it can be overwritten by platform data */
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static struct axis_conversion lis3lv02d_axis_map = { LIS3_DEV_X,
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LIS3_DEV_Y,
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LIS3_DEV_Z };
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static int __devinit lis3lv02d_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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int ret = 0;
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struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
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if (pdata) {
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if (pdata->axis_x)
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lis3lv02d_axis_map.x = pdata->axis_x;
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if (pdata->axis_y)
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lis3lv02d_axis_map.y = pdata->axis_y;
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if (pdata->axis_z)
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lis3lv02d_axis_map.z = pdata->axis_z;
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if (pdata->setup_resources)
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ret = pdata->setup_resources();
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if (ret)
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goto fail;
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}
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lis3_dev.pdata = pdata;
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lis3_dev.bus_priv = client;
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lis3_dev.init = lis3_i2c_init;
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lis3_dev.read = lis3_i2c_read;
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lis3_dev.write = lis3_i2c_write;
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lis3_dev.irq = client->irq;
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lis3_dev.ac = lis3lv02d_axis_map;
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i2c_set_clientdata(client, &lis3_dev);
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ret = lis3lv02d_init_device(&lis3_dev);
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fail:
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return ret;
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}
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static int __devexit lis3lv02d_i2c_remove(struct i2c_client *client)
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{
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struct lis3lv02d *lis3 = i2c_get_clientdata(client);
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struct lis3lv02d_platform_data *pdata = client->dev.platform_data;
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if (pdata && pdata->release_resources)
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pdata->release_resources();
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lis3lv02d_joystick_disable();
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lis3lv02d_poweroff(lis3);
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return lis3lv02d_remove_fs(&lis3_dev);
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}
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#ifdef CONFIG_PM
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static int lis3lv02d_i2c_suspend(struct i2c_client *client, pm_message_t mesg)
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{
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struct lis3lv02d *lis3 = i2c_get_clientdata(client);
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if (!lis3->pdata->wakeup_flags)
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lis3lv02d_poweroff(lis3);
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return 0;
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}
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static int lis3lv02d_i2c_resume(struct i2c_client *client)
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{
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struct lis3lv02d *lis3 = i2c_get_clientdata(client);
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if (!lis3->pdata->wakeup_flags)
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lis3lv02d_poweron(lis3);
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return 0;
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}
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static void lis3lv02d_i2c_shutdown(struct i2c_client *client)
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{
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lis3lv02d_i2c_suspend(client, PMSG_SUSPEND);
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}
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#else
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#define lis3lv02d_i2c_suspend NULL
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#define lis3lv02d_i2c_resume NULL
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#define lis3lv02d_i2c_shutdown NULL
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#endif
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static const struct i2c_device_id lis3lv02d_id[] = {
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{"lis3lv02d", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, lis3lv02d_id);
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static struct i2c_driver lis3lv02d_i2c_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.suspend = lis3lv02d_i2c_suspend,
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.shutdown = lis3lv02d_i2c_shutdown,
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.resume = lis3lv02d_i2c_resume,
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.probe = lis3lv02d_i2c_probe,
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.remove = __devexit_p(lis3lv02d_i2c_remove),
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.id_table = lis3lv02d_id,
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};
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static int __init lis3lv02d_init(void)
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{
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return i2c_add_driver(&lis3lv02d_i2c_driver);
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}
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static void __exit lis3lv02d_exit(void)
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{
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i2c_del_driver(&lis3lv02d_i2c_driver);
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}
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MODULE_AUTHOR("Nokia Corporation");
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MODULE_DESCRIPTION("lis3lv02d I2C interface");
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MODULE_LICENSE("GPL");
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module_init(lis3lv02d_init);
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module_exit(lis3lv02d_exit);
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