From: Dan Murphy <wldm10@motorola.com>
Date: Fri, 28 May 2010 13:53:37 +0000 (-0500)
Subject: misc: Add ST Micro L3G4200D Gyroscope code
X-Git-Tag: firefly_0821_release~9834^2~875
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=20ea8cc19b0681505f5ab78f54b41697fc3f147b;p=firefly-linux-kernel-4.4.55.git
misc: Add ST Micro L3G4200D Gyroscope code
This is the initial submission of code for the gyroscope.
Change-Id: Ie56f79dad42b616058ea59cf05508337cc002f18
Signed-off-by: Dan Murphy <wldm10@motorola.com>
---
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 0b5de4bb2fad..3b32cb25de93 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -348,6 +348,14 @@ config SENSORS_KXTF9
Say yes here if you wish to include the Kionix
KXTF9 accelerometer driver.
+config SENSORS_L3G4200D
+ tristate "ST Micro Gyroscope"
+ default n
+ depends on I2C
+ help
+ Say yes here if you wish to include the ST Micro
+ L3G4200D gyroscope driver.
+
config SENSORS_MAX9635
tristate "Maxim Ambient Light Sensor"
default n
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 9b68f3d55811..7a9d82400508 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -43,3 +43,4 @@ obj-$(CONFIG_APANIC) += apanic.o
obj-$(CONFIG_SENSORS_AK8975) += akm8975.o
obj-$(CONFIG_SENSORS_KXTF9) += kxtf9.o
obj-$(CONFIG_SENSORS_MAX9635) += max9635.o
+obj-$(CONFIG_SENSORS_L3G4200D) += l3g4200d.o
diff --git a/drivers/misc/l3g4200d.c b/drivers/misc/l3g4200d.c
new file mode 100644
index 000000000000..429f9e79db95
--- /dev/null
+++ b/drivers/misc/l3g4200d.c
@@ -0,0 +1,802 @@
+/*
+ * Copyright (C) 2010 Motorola, Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#ifdef CONFIG_HAS_EARLYSUSPEND
+#include <linux/earlysuspend.h>
+#endif
+#include <linux/fs.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input-polldev.h>
+#include <linux/miscdevice.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+
+#include <linux/l3g4200d.h>
+
+#define DEBUG 1
+
+#define L3G4200D_G_2G 0x00
+#define L3G4200D_G_4G 0x10
+#define L3G4200D_G_8G 0x30
+
+/** Register map */
+#define L3G4200D_WHO_AM_I 0x0f
+#define L3G4200D_CTRL_REG1 0x20
+#define L3G4200D_CTRL_REG2 0x21
+#define L3G4200D_CTRL_REG3 0x22
+#define L3G4200D_CTRL_REG4 0x23
+#define L3G4200D_CTRL_REG5 0x24
+
+#define L3G4200D_REF_DATA_CAP 0x25
+#define L3G4200D_STATUS_REG 0x27
+
+#define L3G4200D_OUT_X_L 0x28
+#define L3G4200D_OUT_X_H 0x29
+#define L3G4200D_OUT_Y_L 0x2a
+#define L3G4200D_OUT_Y_H 0x2b
+#define L3G4200D_OUT_Z_L 0x2c
+#define L3G4200D_OUT_Z_H 0x2d
+
+#define L3G4200D_INTERRUPT_CFG 0x30
+#define L3G4200D_INTERRUPT_SRC 0x31
+#define L3G4200D_INTERRUPT_THRESH_X_H 0x32
+#define L3G4200D_INTERRUPT_THRESH_X_L 0x33
+#define L3G4200D_INTERRUPT_THRESH_Y_H 0x34
+#define L3G4200D_INTERRUPT_THRESH_Y_L 0x35
+#define L3G4200D_INTERRUPT_THRESH_Z_H 0x36
+#define L3G4200D_INTERRUPT_THRESH_Z_L 0x37
+#define L3G4200D_INTERRUPT_DURATION 0x38
+
+/** Maximum polled-device-reported g value */
+#define G_MAX 8000
+
+#define SHIFT_ADJ_2G 4
+#define SHIFT_ADJ_4G 3
+#define SHIFT_ADJ_8G 2
+
+#define PM_OFF 0x00
+#define PM_NORMAL 0x20
+#define ENABLE_ALL_AXES 0x07
+
+#define FUZZ 32
+#define FLAT 32
+#define I2C_RETRY_DELAY 5
+#define I2C_RETRIES 5
+#define AUTO_INCREMENT 0x80
+
+#define ODRHALF 0x40 /* 0.5Hz output data rate */
+#define ODR1 0x60 /* 1Hz output data rate */
+#define ODR2 0x80 /* 2Hz output data rate */
+#define ODR5 0xA0 /* 5Hz output data rate */
+#define ODR10 0xC0 /* 10Hz output data rate */
+#define ODR50 0x00 /* 50Hz output data rate */
+#define ODR100 0x08 /* 100Hz output data rate */
+#define ODR400 0x10 /* 400Hz output data rate */
+#define ODR1000 0x18 /* 1000Hz output data rate */
+
+struct l3g4200d_data {
+ struct i2c_client *client;
+ struct l3g4200d_platform_data *pdata;
+
+ struct delayed_work input_work;
+ struct input_dev *input_dev;
+
+ int hw_initialized;
+ atomic_t enabled;
+ int on_before_suspend;
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ struct early_suspend early_suspend;
+#endif
+
+ u8 shift_adj;
+ u8 resume_state[5];
+};
+#ifdef DEBUG
+struct l3g4200d_reg {
+ const char *name;
+ uint8_t reg;
+} l3g4200d_regs[] = {
+ { "WHO_AM_I", L3G4200D_WHO_AM_I },
+ { "CNTRL_1", L3G4200D_CTRL_REG1 },
+ { "CNTRL_2", L3G4200D_CTRL_REG2 },
+ { "CNTRL_3", L3G4200D_CTRL_REG3 },
+ { "CNTRL_4", L3G4200D_CTRL_REG4 },
+ { "CNTRL_5", L3G4200D_CTRL_REG5 },
+ { "REF_DATA_CAP", L3G4200D_REF_DATA_CAP },
+ { "STATUS_REG", L3G4200D_STATUS_REG },
+ { "INT_CFG", L3G4200D_INTERRUPT_CFG },
+ { "INT_SRC", L3G4200D_INTERRUPT_SRC },
+ { "INT_TH_X_H", L3G4200D_INTERRUPT_THRESH_X_H },
+ { "INT_TH_X_L", L3G4200D_INTERRUPT_THRESH_X_L },
+ { "INT_TH_Y_H", L3G4200D_INTERRUPT_THRESH_Y_H },
+ { "INT_TH_Y_L", L3G4200D_INTERRUPT_THRESH_Y_L },
+ { "INT_TH_Z_H", L3G4200D_INTERRUPT_THRESH_Z_H },
+ { "INT_TH_Z_L", L3G4200D_INTERRUPT_THRESH_Z_L },
+ { "INT_DUR", L3G4200D_INTERRUPT_DURATION },
+ { "OUT_X_H", L3G4200D_OUT_X_H },
+ { "OUT_X_L", L3G4200D_OUT_X_L },
+ { "OUT_Y_H", L3G4200D_OUT_Y_H },
+ { "OUT_Y_L", L3G4200D_OUT_Y_L },
+ { "OUT_Z_H", L3G4200D_OUT_Z_H },
+ { "OUT_Z_L", L3G4200D_OUT_Z_L },
+};
+#endif
+static uint32_t l3g4200d_debug = 0xff;
+module_param_named(gyro_debug, l3g4200d_debug, uint, 0664);
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void l3g4200d_early_suspend(struct early_suspend *handler);
+static void l3g4200d_late_resume(struct early_suspend *handler);
+#endif
+
+/*
+ * Because misc devices can not carry a pointer from driver register to
+ * open, we keep this global. This limits the driver to a single instance.
+ */
+struct l3g4200d_data *l3g4200d_misc_data;
+
+static int l3g4200d_i2c_read(struct l3g4200d_data *gyro, u8 * buf, int len)
+{
+ int err;
+ int tries = 0;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = gyro->client->addr,
+ .flags = gyro->client->flags & I2C_M_TEN,
+ .len = 1,
+ .buf = buf,
+ },
+ {
+ .addr = gyro->client->addr,
+ .flags = (gyro->client->flags & I2C_M_TEN) | I2C_M_RD,
+ .len = len,
+ .buf = buf,
+ },
+ };
+
+ do {
+ err = i2c_transfer(gyro->client->adapter, msgs, 2);
+ if (err != 2)
+ msleep_interruptible(I2C_RETRY_DELAY);
+ } while ((err != 2) && (++tries < I2C_RETRIES));
+
+ if (err != 2) {
+ dev_err(&gyro->client->dev, "read transfer error\n");
+ err = -EIO;
+ } else {
+ err = 0;
+ }
+
+ return err;
+}
+
+static int l3g4200d_i2c_write(struct l3g4200d_data *gyro, u8 * buf, int len)
+{
+ int err;
+ int tries = 0;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = gyro->client->addr,
+ .flags = gyro->client->flags & I2C_M_TEN,
+ .len = len + 1,
+ .buf = buf,
+ },
+ };
+
+ do {
+ err = i2c_transfer(gyro->client->adapter, msgs, 1);
+ if (err != 1)
+ msleep_interruptible(I2C_RETRY_DELAY);
+ } while ((err != 1) && (++tries < I2C_RETRIES));
+
+ if (err != 1) {
+ dev_err(&gyro->client->dev, "write transfer error\n");
+ err = -EIO;
+ } else {
+ err = 0;
+ }
+
+ return err;
+}
+static int l3g4200d_hw_init(struct l3g4200d_data *gyro)
+{
+ int err = -1;
+ u8 buf[6];
+
+ buf[0] = (AUTO_INCREMENT | L3G4200D_CTRL_REG1);
+ buf[1] = gyro->resume_state[0];
+ buf[2] = gyro->resume_state[1];
+ buf[3] = gyro->resume_state[2];
+ buf[4] = gyro->resume_state[3];
+ buf[5] = gyro->resume_state[4];
+ err = l3g4200d_i2c_write(gyro, buf, 5);
+ if (err < 0)
+ return err;
+
+ gyro->hw_initialized = 1;
+
+ return 0;
+}
+
+static void l3g4200d_device_power_off(struct l3g4200d_data *gyro)
+{
+ int err;
+ u8 buf[2] = {L3G4200D_CTRL_REG1, PM_OFF};
+
+ err = l3g4200d_i2c_write(gyro, buf, 1);
+ if (err < 0)
+ dev_err(&gyro->client->dev, "soft power off failed\n");
+
+ if (gyro->pdata->power_off) {
+ gyro->pdata->power_off();
+ gyro->hw_initialized = 0;
+ }
+}
+
+static int l3g4200d_device_power_on(struct l3g4200d_data *gyro)
+{
+ int err;
+
+ if (gyro->pdata->power_on) {
+ err = gyro->pdata->power_on();
+ if (err < 0)
+ return err;
+ }
+
+ if (!gyro->hw_initialized) {
+ err = l3g4200d_hw_init(gyro);
+ if (err < 0) {
+ l3g4200d_device_power_off(gyro);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+static int l3g4200d_get_gyro_data(struct l3g4200d_data *gyro, int *xyz)
+{
+ int err = -1;
+ /* Data bytes from hardware xL, xH, yL, yH, zL, zH */
+ u8 gyro_data[6];
+ /* x,y,z hardware data */
+ int hw_d[3] = { 0 };
+
+ gyro_data[0] = (AUTO_INCREMENT | L3G4200D_OUT_X_L);
+ err = l3g4200d_i2c_read(gyro, gyro_data, 6);
+ if (err < 0)
+ return err;
+
+ hw_d[0] = (int) (((gyro_data[1]) << 8) | gyro_data[0]);
+ hw_d[1] = (int) (((gyro_data[3]) << 8) | gyro_data[2]);
+ hw_d[2] = (int) (((gyro_data[5]) << 8) | gyro_data[4]);
+
+ hw_d[0] = (hw_d[0] & 0x8000) ? (hw_d[0] | 0xFFFF0000) : (hw_d[0]);
+ hw_d[1] = (hw_d[1] & 0x8000) ? (hw_d[1] | 0xFFFF0000) : (hw_d[1]);
+ hw_d[2] = (hw_d[2] & 0x8000) ? (hw_d[2] | 0xFFFF0000) : (hw_d[2]);
+
+ hw_d[0] >>= gyro->shift_adj;
+ hw_d[1] >>= gyro->shift_adj;
+ hw_d[2] >>= gyro->shift_adj;
+
+ xyz[0] = ((gyro->pdata->negate_x) ? (-hw_d[gyro->pdata->axis_map_x])
+ : (hw_d[gyro->pdata->axis_map_x]));
+ xyz[1] = ((gyro->pdata->negate_y) ? (-hw_d[gyro->pdata->axis_map_y])
+ : (hw_d[gyro->pdata->axis_map_y]));
+ xyz[2] = ((gyro->pdata->negate_z) ? (-hw_d[gyro->pdata->axis_map_z])
+ : (hw_d[gyro->pdata->axis_map_z]));
+
+ return err;
+}
+
+static void l3g4200d_report_values(struct l3g4200d_data *gyro, int *xyz)
+{
+ input_report_abs(gyro->input_dev, ABS_X, xyz[0]);
+ input_report_abs(gyro->input_dev, ABS_Y, xyz[1]);
+ input_report_abs(gyro->input_dev, ABS_Z, xyz[2]);
+ if (l3g4200d_debug)
+ pr_info("%s: Reporting x: %d, y: %d, z: %d\n",
+ __func__, xyz[0], xyz[1], xyz[2]);
+ input_sync(gyro->input_dev);
+}
+
+static int l3g4200d_enable(struct l3g4200d_data *gyro)
+{
+ int err;
+
+ if (!atomic_cmpxchg(&gyro->enabled, 0, 1)) {
+
+ err = l3g4200d_device_power_on(gyro);
+ if (err < 0) {
+ atomic_set(&gyro->enabled, 0);
+ return err;
+ }
+ schedule_delayed_work(&gyro->input_work,
+ msecs_to_jiffies(gyro->pdata->poll_interval));
+ }
+
+ return 0;
+}
+
+static int l3g4200d_disable(struct l3g4200d_data *gyro)
+{
+ if (atomic_cmpxchg(&gyro->enabled, 1, 0)) {
+ cancel_delayed_work_sync(&gyro->input_work);
+ l3g4200d_device_power_off(gyro);
+ }
+
+ return 0;
+}
+
+static int l3g4200d_misc_open(struct inode *inode, struct file *file)
+{
+ int err;
+ err = nonseekable_open(inode, file);
+ if (err < 0)
+ return err;
+
+ file->private_data = l3g4200d_misc_data;
+
+ return 0;
+}
+
+static int l3g4200d_misc_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+ void __user *argp = (void __user *)arg;
+ int err = 0;
+ int interval;
+ struct l3g4200d_data *gyro = file->private_data;
+
+ switch (cmd) {
+ case L3G4200D_IOCTL_GET_DELAY:
+ interval = gyro->pdata->poll_interval;
+ if (copy_to_user(argp, &interval, sizeof(interval)))
+ return -EFAULT;
+ break;
+
+ case L3G4200D_IOCTL_SET_DELAY:
+ if (copy_from_user(&interval, argp, sizeof(interval)))
+ return -EFAULT;
+ if (interval < 0 || interval > 200)
+ return -EINVAL;
+
+ gyro->pdata->poll_interval =
+ max(interval, gyro->pdata->min_interval);
+ /* TODO: if update fails poll is still set */
+ if (err < 0)
+ return err;
+
+ break;
+
+ case L3G4200D_IOCTL_SET_ENABLE:
+ if (copy_from_user(&interval, argp, sizeof(interval)))
+ return -EFAULT;
+ if (interval > 1)
+ return -EINVAL;
+
+ if (interval)
+ l3g4200d_enable(gyro);
+ else
+ l3g4200d_disable(gyro);
+
+ break;
+
+ case L3G4200D_IOCTL_GET_ENABLE:
+ interval = atomic_read(&gyro->enabled);
+ if (copy_to_user(argp, &interval, sizeof(interval)))
+ return -EINVAL;
+
+ break;
+
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct file_operations l3g4200d_misc_fops = {
+ .owner = THIS_MODULE,
+ .open = l3g4200d_misc_open,
+ .ioctl = l3g4200d_misc_ioctl,
+};
+
+static struct miscdevice l3g4200d_misc_device = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = L3G4200D_NAME,
+ .fops = &l3g4200d_misc_fops,
+};
+
+static void l3g4200d_input_work_func(struct work_struct *work)
+{
+ struct l3g4200d_data *gyro = container_of((struct delayed_work *)work,
+ struct l3g4200d_data,
+ input_work);
+ int xyz[3] = { 0 };
+ int err;
+
+ err = l3g4200d_get_gyro_data(gyro, xyz);
+ if (err < 0)
+ dev_err(&gyro->client->dev, "get_acceleration_data failed\n");
+ else
+ l3g4200d_report_values(gyro, xyz);
+
+ schedule_delayed_work(&gyro->input_work,
+ msecs_to_jiffies(gyro->pdata->poll_interval));
+}
+#ifdef DEBUG
+static ssize_t l3g4200d_registers_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client,
+ dev);
+ struct l3g4200d_data *gyro = i2c_get_clientdata(client);
+ u8 l3g4200d_buf[2];
+ unsigned i, n, reg_count;
+
+ reg_count = sizeof(l3g4200d_regs) / sizeof(l3g4200d_regs[0]);
+ for (i = 0, n = 0; i < reg_count; i++) {
+ l3g4200d_buf[0] = (AUTO_INCREMENT | l3g4200d_regs[i].reg);
+ l3g4200d_i2c_read(gyro, l3g4200d_buf, 1);
+ n += scnprintf(buf + n, PAGE_SIZE - n,
+ "%-20s = 0x%02X\n",
+ l3g4200d_regs[i].name, l3g4200d_buf[0]);
+ }
+ return n;
+}
+
+static ssize_t l3g4200d_registers_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct i2c_client *client = container_of(dev, struct i2c_client,
+ dev);
+ struct l3g4200d_data *gyro = i2c_get_clientdata(client);
+ unsigned i, reg_count, value;
+ int error;
+ u8 l3g4200d_buf[2];
+ char name[30];
+
+ if (count >= 30) {
+ pr_err("%s:input too long\n", __func__);
+ return -1;
+ }
+
+ if (sscanf(buf, "%s %x", name, &value) != 2) {
+ pr_err("%s:unable to parse input\n", __func__);
+ return -1;
+ }
+
+ reg_count = sizeof(l3g4200d_regs) / sizeof(l3g4200d_regs[0]);
+ for (i = 0; i < reg_count; i++) {
+ if (!strcmp(name, l3g4200d_regs[i].name)) {
+ l3g4200d_buf[0] = (AUTO_INCREMENT | l3g4200d_regs[i].reg);
+ l3g4200d_buf[1] = value;
+ error = l3g4200d_i2c_write(gyro, l3g4200d_buf, 2);
+ if (error) {
+ pr_err("%s:Failed to write register %s\n",
+ __func__, name);
+ return -1;
+ }
+ return count;
+ }
+ }
+ if (!strcmp("Go", name)) {
+ l3g4200d_enable(gyro);
+ return 0;
+ }
+ if (!strcmp("Stop", name)) {
+ l3g4200d_disable(gyro);
+ return 0;
+ }
+ pr_err("%s:no such register %s\n", __func__, name);
+ return -1;
+}
+static DEVICE_ATTR(registers, 0644, l3g4200d_registers_show,
+ l3g4200d_registers_store);
+#endif
+#ifdef L3G4200D_OPEN_ENABLE
+int l3g4200d_input_open(struct input_dev *input)
+{
+ struct l3g4200d_data *gyro = input_get_drvdata(input);
+
+ return l3g4200d_enable(gyro);
+}
+
+void l3g4200d_input_close(struct input_dev *dev)
+{
+ struct l3g4200d_data *gyro = input_get_drvdata(dev);
+
+ l3g4200d_disable(gyro);
+}
+#endif
+
+static int l3g4200d_validate_pdata(struct l3g4200d_data *gyro)
+{
+ gyro->pdata->poll_interval = max(gyro->pdata->poll_interval,
+ gyro->pdata->min_interval);
+
+ if (gyro->pdata->axis_map_x > 2 ||
+ gyro->pdata->axis_map_y > 2 || gyro->pdata->axis_map_z > 2) {
+ dev_err(&gyro->client->dev,
+ "invalid axis_map value x:%u y:%u z%u\n",
+ gyro->pdata->axis_map_x, gyro->pdata->axis_map_y,
+ gyro->pdata->axis_map_z);
+ return -EINVAL;
+ }
+
+ /* Only allow 0 and 1 for negation boolean flag */
+ if (gyro->pdata->negate_x > 1 || gyro->pdata->negate_y > 1 ||
+ gyro->pdata->negate_z > 1) {
+ dev_err(&gyro->client->dev,
+ "invalid negate value x:%u y:%u z:%u\n",
+ gyro->pdata->negate_x, gyro->pdata->negate_y,
+ gyro->pdata->negate_z);
+ return -EINVAL;
+ }
+
+ /* Enforce minimum polling interval */
+ if (gyro->pdata->poll_interval < gyro->pdata->min_interval) {
+ dev_err(&gyro->client->dev, "minimum poll interval violated\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int l3g4200d_input_init(struct l3g4200d_data *gyro)
+{
+ int err;
+
+ INIT_DELAYED_WORK(&gyro->input_work, l3g4200d_input_work_func);
+
+ gyro->input_dev = input_allocate_device();
+ if (!gyro->input_dev) {
+ err = -ENOMEM;
+ dev_err(&gyro->client->dev, "input device allocate failed\n");
+ goto err0;
+ }
+
+#ifdef L3G4200D_OPEN_ENABLE
+ gyro->input_dev->open = l3g4200d_input_open;
+ gyro->input_dev->close = l3g4200d_input_close;
+#endif
+
+ input_set_drvdata(gyro->input_dev, gyro);
+
+ set_bit(EV_ABS, gyro->input_dev->evbit);
+
+ input_set_abs_params(gyro->input_dev, ABS_X, -G_MAX, G_MAX, FUZZ, FLAT);
+ input_set_abs_params(gyro->input_dev, ABS_Y, -G_MAX, G_MAX, FUZZ, FLAT);
+ input_set_abs_params(gyro->input_dev, ABS_Z, -G_MAX, G_MAX, FUZZ, FLAT);
+
+ gyro->input_dev->name = "gyroscope";
+
+ err = input_register_device(gyro->input_dev);
+ if (err) {
+ dev_err(&gyro->client->dev,
+ "unable to register input polled device %s\n",
+ gyro->input_dev->name);
+ goto err1;
+ }
+
+ return 0;
+
+err1:
+ input_free_device(gyro->input_dev);
+err0:
+ return err;
+}
+
+static void l3g4200d_input_cleanup(struct l3g4200d_data *gyro)
+{
+ input_unregister_device(gyro->input_dev);
+ input_free_device(gyro->input_dev);
+}
+
+static int l3g4200d_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct l3g4200d_data *gyro;
+ int err = -1;
+
+ pr_err("%s:Enter\n", __func__);
+ if (client->dev.platform_data == NULL) {
+ dev_err(&client->dev, "platform data is NULL. exiting.\n");
+ err = -ENODEV;
+ goto err0;
+ }
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "client not i2c capable\n");
+ err = -ENODEV;
+ goto err0;
+ }
+
+ gyro = kzalloc(sizeof(*gyro), GFP_KERNEL);
+ if (gyro == NULL) {
+ dev_err(&client->dev,
+ "failed to allocate memory for module data\n");
+ err = -ENOMEM;
+ goto err0;
+ }
+
+ gyro->client = client;
+
+ gyro->pdata = kzalloc(sizeof(*gyro->pdata), GFP_KERNEL);
+ if (gyro->pdata == NULL)
+ goto err1;
+
+ memcpy(gyro->pdata, client->dev.platform_data, sizeof(*gyro->pdata));
+
+ err = l3g4200d_validate_pdata(gyro);
+ if (err < 0) {
+ dev_err(&client->dev, "failed to validate platform data\n");
+ goto err2;
+ }
+
+ i2c_set_clientdata(client, gyro);
+
+ memset(gyro->resume_state, 0, ARRAY_SIZE(gyro->resume_state));
+
+ gyro->resume_state[0] = gyro->pdata->ctrl_reg_1;
+ gyro->resume_state[1] = gyro->pdata->ctrl_reg_2;
+ gyro->resume_state[2] = gyro->pdata->ctrl_reg_3;
+ gyro->resume_state[3] = gyro->pdata->ctrl_reg_4;
+ gyro->resume_state[4] = gyro->pdata->ctrl_reg_5;
+
+ /* As default, do not report information */
+ atomic_set(&gyro->enabled, 0);
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ gyro->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
+ gyro->early_suspend.suspend = l3g4200d_early_suspend;
+ gyro->early_suspend.resume = l3g4200d_late_resume;
+ register_early_suspend(&gyro->early_suspend);
+#endif
+
+ err = l3g4200d_input_init(gyro);
+ if (err < 0)
+ goto err3;
+
+ l3g4200d_misc_data = gyro;
+
+ err = misc_register(&l3g4200d_misc_device);
+ if (err < 0) {
+ dev_err(&client->dev, "l3g4200d_device register failed\n");
+ goto err4;
+ }
+#ifdef DEBUG
+ err = device_create_file(&client->dev, &dev_attr_registers);
+ if (err < 0)
+ pr_err("%s:File device creation failed: %d\n", __func__, err);
+#endif
+
+ pr_err("%s:Gyro probed\n", __func__);
+ return 0;
+
+err4:
+ l3g4200d_input_cleanup(gyro);
+err3:
+ if (gyro->pdata->exit)
+ gyro->pdata->exit();
+err2:
+ kfree(gyro->pdata);
+err1:
+ kfree(gyro);
+err0:
+ return err;
+}
+
+static int __devexit l3g4200d_remove(struct i2c_client *client)
+{
+ struct l3g4200d_data *gyro = i2c_get_clientdata(client);
+
+#ifdef DEBUG
+ device_remove_file(&client->dev, &dev_attr_registers);
+#endif
+ misc_deregister(&l3g4200d_misc_device);
+ l3g4200d_input_cleanup(gyro);
+ l3g4200d_device_power_off(gyro);
+ if (gyro->pdata->exit)
+ gyro->pdata->exit();
+ kfree(gyro->pdata);
+ kfree(gyro);
+
+ return 0;
+}
+
+static int l3g4200d_resume(struct i2c_client *client)
+{
+ struct l3g4200d_data *gyro = i2c_get_clientdata(client);
+
+ if (gyro->on_before_suspend)
+ return l3g4200d_enable(gyro);
+ return 0;
+}
+
+static int l3g4200d_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ struct l3g4200d_data *gyro = i2c_get_clientdata(client);
+
+ gyro->on_before_suspend = atomic_read(&gyro->enabled);
+ return l3g4200d_disable(gyro);
+}
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void l3g4200d_early_suspend(struct early_suspend *handler)
+{
+ struct l3g4200d_data *gyro;
+
+ gyro = container_of(handler, struct l3g4200d_data, early_suspend);
+ l3g4200d_suspend(gyro->client, PMSG_SUSPEND);
+}
+
+static void l3g4200d_late_resume(struct early_suspend *handler)
+{
+ struct l3g4200d_data *gyro;
+
+ gyro = container_of(handler, struct l3g4200d_data, early_suspend);
+ l3g4200d_resume(gyro->client);
+}
+#endif
+
+static const struct i2c_device_id l3g4200d_id[] = {
+ {L3G4200D_NAME, 0},
+ {},
+};
+
+MODULE_DEVICE_TABLE(i2c, l3g4200d_id);
+
+static struct i2c_driver l3g4200d_driver = {
+ .driver = {
+ .name = L3G4200D_NAME,
+ },
+ .probe = l3g4200d_probe,
+ .remove = __devexit_p(l3g4200d_remove),
+#ifndef CONFIG_HAS_EARLYSUSPEND
+ .resume = l3g4200d_resume,
+ .suspend = l3g4200d_suspend,
+#endif
+ .id_table = l3g4200d_id,
+};
+
+static int __init l3g4200d_init(void)
+{
+ pr_info("L3G4200D gyroscope driver\n");
+ return i2c_add_driver(&l3g4200d_driver);
+}
+
+static void __exit l3g4200d_exit(void)
+{
+ i2c_del_driver(&l3g4200d_driver);
+ return;
+}
+
+module_init(l3g4200d_init);
+module_exit(l3g4200d_exit);
+
+MODULE_DESCRIPTION("l3g4200d gyroscope driver");
+MODULE_AUTHOR("Dan Murphy D.Murphy@Motorola.com");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/l3g4200d.h b/include/linux/l3g4200d.h
new file mode 100644
index 000000000000..e6d5faa06d9c
--- /dev/null
+++ b/include/linux/l3g4200d.h
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2010 Motorola, Inc.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307, USA
+ */
+
+#ifndef __L3G4200D_H__
+#define __L3G4200D_H__
+
+#include <linux/ioctl.h> /* For IOCTL macros */
+
+#define L3G4200D_NAME "l3g4200d"
+
+#define L3G4200D_IOCTL_BASE 77
+/** The following define the IOCTL command values via the ioctl macros */
+#define L3G4200D_IOCTL_SET_DELAY _IOW(L3G4200D_IOCTL_BASE, 0, int)
+#define L3G4200D_IOCTL_GET_DELAY _IOR(L3G4200D_IOCTL_BASE, 1, int)
+#define L3G4200D_IOCTL_SET_ENABLE _IOW(L3G4200D_IOCTL_BASE, 2, int)
+#define L3G4200D_IOCTL_GET_ENABLE _IOR(L3G4200D_IOCTL_BASE, 3, int)
+
+#ifdef __KERNEL__
+
+struct l3g4200d_platform_data {
+ int poll_interval;
+ int min_interval;
+
+ u8 ctrl_reg_1;
+ u8 ctrl_reg_2;
+ u8 ctrl_reg_3;
+ u8 ctrl_reg_4;
+ u8 ctrl_reg_5;
+
+ u8 int_config;
+ u8 int_source;
+
+ u8 int_th_x_h;
+ u8 int_th_x_l;
+ u8 int_th_y_h;
+ u8 int_th_y_l;
+ u8 int_th_z_h;
+ u8 int_th_z_l;
+ u8 int_duration;
+
+ u8 g_range;
+
+ u8 axis_map_x;
+ u8 axis_map_y;
+ u8 axis_map_z;
+
+ u8 negate_x;
+ u8 negate_y;
+ u8 negate_z;
+
+ void (*exit)(void);
+ int (*power_on)(void);
+ int (*power_off)(void);
+
+};
+#endif /* __KERNEL__ */
+
+#endif /* __L3G4200D_H__ */
+