#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
-#include <linux/input.h>
-#include <linux/kthread.h>
-#include <linux/semaphore.h>
+#include <linux/input-polldev.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/poll.h>
#include <linux/freezer.h>
#include <linux/uaccess.h>
#include <linux/miscdevice.h>
-#include <acpi/acpi_drivers.h>
#include <asm/atomic.h>
#include "lis3lv02d.h"
#define MDPS_POLL_INTERVAL 50
/*
* The sensor can also generate interrupts (DRDY) but it's pretty pointless
- * because their are generated even if the data do not change. So it's better
+ * because they are generated even if the data do not change. So it's better
* to keep the interrupt for the free-fall event. The values are updated at
* 40Hz (at the lowest frequency), but as it can be pretty time consuming on
* some low processor, we poll the sensor only at 20Hz... enough for the
* joystick.
*/
-struct acpi_lis3lv02d lis3_dev = {
+#define LIS3_PWRON_DELAY_WAI_12B (5000)
+#define LIS3_PWRON_DELAY_WAI_8B (3000)
+
+/*
+ * LIS3LV02D spec says 1024 LSBs corresponds 1 G -> 1LSB is 1000/1024 mG
+ * LIS302D spec says: 18 mG / digit
+ * LIS3_ACCURACY is used to increase accuracy of the intermediate
+ * calculation results.
+ */
+#define LIS3_ACCURACY 1024
+/* Sensitivity values for -2G +2G scale */
+#define LIS3_SENSITIVITY_12B ((LIS3_ACCURACY * 1000) / 1024)
+#define LIS3_SENSITIVITY_8B (18 * LIS3_ACCURACY)
+
+#define LIS3_DEFAULT_FUZZ 3
+#define LIS3_DEFAULT_FLAT 3
+
+struct lis3lv02d lis3_dev = {
.misc_wait = __WAIT_QUEUE_HEAD_INITIALIZER(lis3_dev.misc_wait),
};
EXPORT_SYMBOL_GPL(lis3_dev);
-static int lis3lv02d_add_fs(struct acpi_device *device);
+static s16 lis3lv02d_read_8(struct lis3lv02d *lis3, int reg)
+{
+ s8 lo;
+ if (lis3->read(lis3, reg, &lo) < 0)
+ return 0;
+
+ return lo;
+}
-static s16 lis3lv02d_read_16(acpi_handle handle, int reg)
+static s16 lis3lv02d_read_12(struct lis3lv02d *lis3, int reg)
{
u8 lo, hi;
- lis3_dev.read(handle, reg, &lo);
- lis3_dev.read(handle, reg + 1, &hi);
+ lis3->read(lis3, reg - 1, &lo);
+ lis3->read(lis3, reg, &hi);
/* In "12 bit right justified" mode, bit 6, bit 7, bit 8 = bit 5 */
return (s16)((hi << 8) | lo);
}
/**
* lis3lv02d_get_xyz - Get X, Y and Z axis values from the accelerometer
- * @handle: the handle to the device
- * @x: where to store the X axis value
- * @y: where to store the Y axis value
- * @z: where to store the Z axis value
+ * @lis3: pointer to the device struct
+ * @x: where to store the X axis value
+ * @y: where to store the Y axis value
+ * @z: where to store the Z axis value
*
* Note that 40Hz input device can eat up about 10% CPU at 800MHZ
*/
-static void lis3lv02d_get_xyz(acpi_handle handle, int *x, int *y, int *z)
+static void lis3lv02d_get_xyz(struct lis3lv02d *lis3, int *x, int *y, int *z)
{
int position[3];
+ int i;
- position[0] = lis3_dev.read_data(handle, OUTX);
- position[1] = lis3_dev.read_data(handle, OUTY);
- position[2] = lis3_dev.read_data(handle, OUTZ);
+ mutex_lock(&lis3->mutex);
+ position[0] = lis3->read_data(lis3, OUTX);
+ position[1] = lis3->read_data(lis3, OUTY);
+ position[2] = lis3->read_data(lis3, OUTZ);
+ mutex_unlock(&lis3->mutex);
- *x = lis3lv02d_get_axis(lis3_dev.ac.x, position);
- *y = lis3lv02d_get_axis(lis3_dev.ac.y, position);
- *z = lis3lv02d_get_axis(lis3_dev.ac.z, position);
+ for (i = 0; i < 3; i++)
+ position[i] = (position[i] * lis3->scale) / LIS3_ACCURACY;
+
+ *x = lis3lv02d_get_axis(lis3->ac.x, position);
+ *y = lis3lv02d_get_axis(lis3->ac.y, position);
+ *z = lis3lv02d_get_axis(lis3->ac.z, position);
}
-void lis3lv02d_poweroff(acpi_handle handle)
+/* conversion btw sampling rate and the register values */
+static int lis3_12_rates[4] = {40, 160, 640, 2560};
+static int lis3_8_rates[2] = {100, 400};
+
+/* ODR is Output Data Rate */
+static int lis3lv02d_get_odr(void)
{
- lis3_dev.is_on = 0;
+ u8 ctrl;
+ int shift;
+
+ lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
+ ctrl &= lis3_dev.odr_mask;
+ shift = ffs(lis3_dev.odr_mask) - 1;
+ return lis3_dev.odrs[(ctrl >> shift)];
}
-EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
-void lis3lv02d_poweron(acpi_handle handle)
+static int lis3lv02d_set_odr(int rate)
{
- lis3_dev.is_on = 1;
- lis3_dev.init(handle);
+ u8 ctrl;
+ int i, len, shift;
+
+ lis3_dev.read(&lis3_dev, CTRL_REG1, &ctrl);
+ ctrl &= ~lis3_dev.odr_mask;
+ len = 1 << hweight_long(lis3_dev.odr_mask); /* # of possible values */
+ shift = ffs(lis3_dev.odr_mask) - 1;
+
+ for (i = 0; i < len; i++)
+ if (lis3_dev.odrs[i] == rate) {
+ lis3_dev.write(&lis3_dev, CTRL_REG1,
+ ctrl | (i << shift));
+ return 0;
+ }
+ return -EINVAL;
}
-EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
-/*
- * To be called before starting to use the device. It makes sure that the
- * device will always be on until a call to lis3lv02d_decrease_use(). Not to be
- * used from interrupt context.
- */
-static void lis3lv02d_increase_use(struct acpi_lis3lv02d *dev)
+static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3])
{
- mutex_lock(&dev->lock);
- dev->usage++;
- if (dev->usage == 1) {
- if (!dev->is_on)
- lis3lv02d_poweron(dev->device->handle);
+ u8 reg;
+ s16 x, y, z;
+ u8 selftest;
+ int ret;
+
+ mutex_lock(&lis3->mutex);
+ if (lis3_dev.whoami == WAI_12B)
+ selftest = CTRL1_ST;
+ else
+ selftest = CTRL1_STP;
+
+ lis3->read(lis3, CTRL_REG1, ®);
+ lis3->write(lis3, CTRL_REG1, (reg | selftest));
+ msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+ /* Read directly to avoid axis remap */
+ x = lis3->read_data(lis3, OUTX);
+ y = lis3->read_data(lis3, OUTY);
+ z = lis3->read_data(lis3, OUTZ);
+
+ /* back to normal settings */
+ lis3->write(lis3, CTRL_REG1, reg);
+ msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+ results[0] = x - lis3->read_data(lis3, OUTX);
+ results[1] = y - lis3->read_data(lis3, OUTY);
+ results[2] = z - lis3->read_data(lis3, OUTZ);
+
+ ret = 0;
+ if (lis3->pdata) {
+ int i;
+ for (i = 0; i < 3; i++) {
+ /* Check against selftest acceptance limits */
+ if ((results[i] < lis3->pdata->st_min_limits[i]) ||
+ (results[i] > lis3->pdata->st_max_limits[i])) {
+ ret = -EIO;
+ goto fail;
+ }
+ }
}
- mutex_unlock(&dev->lock);
+
+ /* test passed */
+fail:
+ mutex_unlock(&lis3->mutex);
+ return ret;
}
-/*
- * To be called whenever a usage of the device is stopped.
- * It will make sure to turn off the device when there is not usage.
- */
-static void lis3lv02d_decrease_use(struct acpi_lis3lv02d *dev)
+void lis3lv02d_poweroff(struct lis3lv02d *lis3)
{
- mutex_lock(&dev->lock);
- dev->usage--;
- if (dev->usage == 0)
- lis3lv02d_poweroff(dev->device->handle);
- mutex_unlock(&dev->lock);
+ /* disable X,Y,Z axis and power down */
+ lis3->write(lis3, CTRL_REG1, 0x00);
}
+EXPORT_SYMBOL_GPL(lis3lv02d_poweroff);
+
+void lis3lv02d_poweron(struct lis3lv02d *lis3)
+{
+ u8 reg;
+
+ lis3->init(lis3);
+
+ /* LIS3 power on delay is quite long */
+ msleep(lis3->pwron_delay / lis3lv02d_get_odr());
+
+ /*
+ * Common configuration
+ * BDU: (12 bits sensors only) LSB and MSB values are not updated until
+ * both have been read. So the value read will always be correct.
+ */
+ if (lis3->whoami == WAI_12B) {
+ lis3->read(lis3, CTRL_REG2, ®);
+ reg |= CTRL2_BDU;
+ lis3->write(lis3, CTRL_REG2, reg);
+ }
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_poweron);
+
static irqreturn_t lis302dl_interrupt(int irq, void *dummy)
{
printk(KERN_ERR DRIVER_NAME ": IRQ%d allocation failed\n", lis3_dev.irq);
return -EBUSY;
}
- lis3lv02d_increase_use(&lis3_dev);
- printk("lis3: registered interrupt %d\n", lis3_dev.irq);
return 0;
}
static int lis3lv02d_misc_release(struct inode *inode, struct file *file)
{
fasync_helper(-1, file, 0, &lis3_dev.async_queue);
- lis3lv02d_decrease_use(&lis3_dev);
free_irq(lis3_dev.irq, &lis3_dev);
clear_bit(0, &lis3_dev.misc_opened); /* release the device */
return 0;
.fops = &lis3lv02d_misc_fops,
};
-/**
- * lis3lv02d_joystick_kthread - Kthread polling function
- * @data: unused - here to conform to threadfn prototype
- */
-static int lis3lv02d_joystick_kthread(void *data)
+static void lis3lv02d_joystick_poll(struct input_polled_dev *pidev)
{
int x, y, z;
- while (!kthread_should_stop()) {
- lis3lv02d_get_xyz(lis3_dev.device->handle, &x, &y, &z);
- input_report_abs(lis3_dev.idev, ABS_X, x - lis3_dev.xcalib);
- input_report_abs(lis3_dev.idev, ABS_Y, y - lis3_dev.ycalib);
- input_report_abs(lis3_dev.idev, ABS_Z, z - lis3_dev.zcalib);
-
- input_sync(lis3_dev.idev);
-
- try_to_freeze();
- msleep_interruptible(MDPS_POLL_INTERVAL);
- }
-
- return 0;
-}
-
-static int lis3lv02d_joystick_open(struct input_dev *input)
-{
- lis3lv02d_increase_use(&lis3_dev);
- lis3_dev.kthread = kthread_run(lis3lv02d_joystick_kthread, NULL, "klis3lv02d");
- if (IS_ERR(lis3_dev.kthread)) {
- lis3lv02d_decrease_use(&lis3_dev);
- return PTR_ERR(lis3_dev.kthread);
- }
-
- return 0;
-}
-
-static void lis3lv02d_joystick_close(struct input_dev *input)
-{
- kthread_stop(lis3_dev.kthread);
- lis3lv02d_decrease_use(&lis3_dev);
-}
-
-static inline void lis3lv02d_calibrate_joystick(void)
-{
- lis3lv02d_get_xyz(lis3_dev.device->handle, &lis3_dev.xcalib, &lis3_dev.ycalib, &lis3_dev.zcalib);
+ lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
+ input_report_abs(pidev->input, ABS_X, x);
+ input_report_abs(pidev->input, ABS_Y, y);
+ input_report_abs(pidev->input, ABS_Z, z);
+ input_sync(pidev->input);
}
int lis3lv02d_joystick_enable(void)
{
+ struct input_dev *input_dev;
int err;
+ int max_val, fuzz, flat;
if (lis3_dev.idev)
return -EINVAL;
- lis3_dev.idev = input_allocate_device();
+ lis3_dev.idev = input_allocate_polled_device();
if (!lis3_dev.idev)
return -ENOMEM;
- lis3lv02d_calibrate_joystick();
-
- lis3_dev.idev->name = "ST LIS3LV02DL Accelerometer";
- lis3_dev.idev->phys = DRIVER_NAME "/input0";
- lis3_dev.idev->id.bustype = BUS_HOST;
- lis3_dev.idev->id.vendor = 0;
- lis3_dev.idev->dev.parent = &lis3_dev.pdev->dev;
- lis3_dev.idev->open = lis3lv02d_joystick_open;
- lis3_dev.idev->close = lis3lv02d_joystick_close;
-
- set_bit(EV_ABS, lis3_dev.idev->evbit);
- input_set_abs_params(lis3_dev.idev, ABS_X, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
- input_set_abs_params(lis3_dev.idev, ABS_Y, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
- input_set_abs_params(lis3_dev.idev, ABS_Z, -lis3_dev.mdps_max_val, lis3_dev.mdps_max_val, 3, 3);
-
- err = input_register_device(lis3_dev.idev);
+ lis3_dev.idev->poll = lis3lv02d_joystick_poll;
+ lis3_dev.idev->poll_interval = MDPS_POLL_INTERVAL;
+ input_dev = lis3_dev.idev->input;
+
+ input_dev->name = "ST LIS3LV02DL Accelerometer";
+ input_dev->phys = DRIVER_NAME "/input0";
+ input_dev->id.bustype = BUS_HOST;
+ input_dev->id.vendor = 0;
+ input_dev->dev.parent = &lis3_dev.pdev->dev;
+
+ set_bit(EV_ABS, input_dev->evbit);
+ max_val = (lis3_dev.mdps_max_val * lis3_dev.scale) / LIS3_ACCURACY;
+ fuzz = (LIS3_DEFAULT_FUZZ * lis3_dev.scale) / LIS3_ACCURACY;
+ flat = (LIS3_DEFAULT_FLAT * lis3_dev.scale) / LIS3_ACCURACY;
+ input_set_abs_params(input_dev, ABS_X, -max_val, max_val, fuzz, flat);
+ input_set_abs_params(input_dev, ABS_Y, -max_val, max_val, fuzz, flat);
+ input_set_abs_params(input_dev, ABS_Z, -max_val, max_val, fuzz, flat);
+
+ err = input_register_polled_device(lis3_dev.idev);
if (err) {
- input_free_device(lis3_dev.idev);
+ input_free_polled_device(lis3_dev.idev);
lis3_dev.idev = NULL;
}
if (!lis3_dev.idev)
return;
- misc_deregister(&lis3lv02d_misc_device);
- input_unregister_device(lis3_dev.idev);
+ if (lis3_dev.irq)
+ misc_deregister(&lis3lv02d_misc_device);
+ input_unregister_polled_device(lis3_dev.idev);
+ input_free_polled_device(lis3_dev.idev);
lis3_dev.idev = NULL;
}
EXPORT_SYMBOL_GPL(lis3lv02d_joystick_disable);
-/*
- * Initialise the accelerometer and the various subsystems.
- * Should be rather independant of the bus system.
- */
-int lis3lv02d_init_device(struct acpi_lis3lv02d *dev)
+/* Sysfs stuff */
+static ssize_t lis3lv02d_selftest_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- mutex_init(&dev->lock);
- lis3lv02d_add_fs(dev->device);
- lis3lv02d_increase_use(dev);
-
- if (lis3lv02d_joystick_enable())
- printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
-
- printk("lis3_init_device: irq %d\n", dev->irq);
-
- /* if we did not get an IRQ from ACPI - we have nothing more to do */
- if (!dev->irq) {
- printk(KERN_ERR DRIVER_NAME
- ": No IRQ in ACPI. Disabling /dev/freefall\n");
- goto out;
- }
+ int result;
+ s16 values[3];
- printk("lis3: registering device\n");
- if (misc_register(&lis3lv02d_misc_device))
- printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
-out:
- lis3lv02d_decrease_use(dev);
- return 0;
+ result = lis3lv02d_selftest(&lis3_dev, values);
+ return sprintf(buf, "%s %d %d %d\n", result == 0 ? "OK" : "FAIL",
+ values[0], values[1], values[2]);
}
-EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
-/* Sysfs stuff */
static ssize_t lis3lv02d_position_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
int x, y, z;
- lis3lv02d_increase_use(&lis3_dev);
- lis3lv02d_get_xyz(lis3_dev.device->handle, &x, &y, &z);
- lis3lv02d_decrease_use(&lis3_dev);
+ lis3lv02d_get_xyz(&lis3_dev, &x, &y, &z);
return sprintf(buf, "(%d,%d,%d)\n", x, y, z);
}
-static ssize_t lis3lv02d_calibrate_show(struct device *dev,
- struct device_attribute *attr, char *buf)
+static ssize_t lis3lv02d_rate_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "(%d,%d,%d)\n", lis3_dev.xcalib, lis3_dev.ycalib, lis3_dev.zcalib);
+ return sprintf(buf, "%d\n", lis3lv02d_get_odr());
}
-static ssize_t lis3lv02d_calibrate_store(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t count)
+static ssize_t lis3lv02d_rate_set(struct device *dev,
+ struct device_attribute *attr, const char *buf,
+ size_t count)
{
- lis3lv02d_increase_use(&lis3_dev);
- lis3lv02d_calibrate_joystick();
- lis3lv02d_decrease_use(&lis3_dev);
- return count;
-}
+ unsigned long rate;
-/* conversion btw sampling rate and the register values */
-static int lis3lv02dl_df_val[4] = {40, 160, 640, 2560};
-static ssize_t lis3lv02d_rate_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- u8 ctrl;
- int val;
+ if (strict_strtoul(buf, 0, &rate))
+ return -EINVAL;
- lis3lv02d_increase_use(&lis3_dev);
- lis3_dev.read(lis3_dev.device->handle, CTRL_REG1, &ctrl);
- lis3lv02d_decrease_use(&lis3_dev);
- val = (ctrl & (CTRL1_DF0 | CTRL1_DF1)) >> 4;
- return sprintf(buf, "%d\n", lis3lv02dl_df_val[val]);
+ if (lis3lv02d_set_odr(rate))
+ return -EINVAL;
+
+ return count;
}
+static DEVICE_ATTR(selftest, S_IRUSR, lis3lv02d_selftest_show, NULL);
static DEVICE_ATTR(position, S_IRUGO, lis3lv02d_position_show, NULL);
-static DEVICE_ATTR(calibrate, S_IRUGO|S_IWUSR, lis3lv02d_calibrate_show,
- lis3lv02d_calibrate_store);
-static DEVICE_ATTR(rate, S_IRUGO, lis3lv02d_rate_show, NULL);
+static DEVICE_ATTR(rate, S_IRUGO | S_IWUSR, lis3lv02d_rate_show,
+ lis3lv02d_rate_set);
static struct attribute *lis3lv02d_attributes[] = {
+ &dev_attr_selftest.attr,
&dev_attr_position.attr,
- &dev_attr_calibrate.attr,
&dev_attr_rate.attr,
NULL
};
};
-static int lis3lv02d_add_fs(struct acpi_device *device)
+static int lis3lv02d_add_fs(struct lis3lv02d *lis3)
{
- lis3_dev.pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
- if (IS_ERR(lis3_dev.pdev))
- return PTR_ERR(lis3_dev.pdev);
+ lis3->pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0);
+ if (IS_ERR(lis3->pdev))
+ return PTR_ERR(lis3->pdev);
- return sysfs_create_group(&lis3_dev.pdev->dev.kobj, &lis3lv02d_attribute_group);
+ return sysfs_create_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
}
-int lis3lv02d_remove_fs(void)
+int lis3lv02d_remove_fs(struct lis3lv02d *lis3)
{
- sysfs_remove_group(&lis3_dev.pdev->dev.kobj, &lis3lv02d_attribute_group);
- platform_device_unregister(lis3_dev.pdev);
+ sysfs_remove_group(&lis3->pdev->dev.kobj, &lis3lv02d_attribute_group);
+ platform_device_unregister(lis3->pdev);
return 0;
}
EXPORT_SYMBOL_GPL(lis3lv02d_remove_fs);
+/*
+ * Initialise the accelerometer and the various subsystems.
+ * Should be rather independent of the bus system.
+ */
+int lis3lv02d_init_device(struct lis3lv02d *dev)
+{
+ dev->whoami = lis3lv02d_read_8(dev, WHO_AM_I);
+
+ switch (dev->whoami) {
+ case WAI_12B:
+ printk(KERN_INFO DRIVER_NAME ": 12 bits sensor found\n");
+ dev->read_data = lis3lv02d_read_12;
+ dev->mdps_max_val = 2048;
+ dev->pwron_delay = LIS3_PWRON_DELAY_WAI_12B;
+ dev->odrs = lis3_12_rates;
+ dev->odr_mask = CTRL1_DF0 | CTRL1_DF1;
+ dev->scale = LIS3_SENSITIVITY_12B;
+ break;
+ case WAI_8B:
+ printk(KERN_INFO DRIVER_NAME ": 8 bits sensor found\n");
+ dev->read_data = lis3lv02d_read_8;
+ dev->mdps_max_val = 128;
+ dev->pwron_delay = LIS3_PWRON_DELAY_WAI_8B;
+ dev->odrs = lis3_8_rates;
+ dev->odr_mask = CTRL1_DR;
+ dev->scale = LIS3_SENSITIVITY_8B;
+ break;
+ default:
+ printk(KERN_ERR DRIVER_NAME
+ ": unknown sensor type 0x%X\n", dev->whoami);
+ return -EINVAL;
+ }
+
+ mutex_init(&dev->mutex);
+
+ lis3lv02d_add_fs(dev);
+ lis3lv02d_poweron(dev);
+
+ if (lis3lv02d_joystick_enable())
+ printk(KERN_ERR DRIVER_NAME ": joystick initialization failed\n");
+
+ /* passing in platform specific data is purely optional and only
+ * used by the SPI transport layer at the moment */
+ if (dev->pdata) {
+ struct lis3lv02d_platform_data *p = dev->pdata;
+
+ if (p->click_flags && (dev->whoami == WAI_8B)) {
+ dev->write(dev, CLICK_CFG, p->click_flags);
+ dev->write(dev, CLICK_TIMELIMIT, p->click_time_limit);
+ dev->write(dev, CLICK_LATENCY, p->click_latency);
+ dev->write(dev, CLICK_WINDOW, p->click_window);
+ dev->write(dev, CLICK_THSZ, p->click_thresh_z & 0xf);
+ dev->write(dev, CLICK_THSY_X,
+ (p->click_thresh_x & 0xf) |
+ (p->click_thresh_y << 4));
+ }
+
+ if (p->wakeup_flags && (dev->whoami == WAI_8B)) {
+ dev->write(dev, FF_WU_CFG_1, p->wakeup_flags);
+ dev->write(dev, FF_WU_THS_1, p->wakeup_thresh & 0x7f);
+ /* default to 2.5ms for now */
+ dev->write(dev, FF_WU_DURATION_1, 1);
+ /* enable high pass filter for both free-fall units */
+ dev->write(dev, CTRL_REG2, HP_FF_WU1 | HP_FF_WU2);
+ }
+
+ if (p->irq_cfg)
+ dev->write(dev, CTRL_REG3, p->irq_cfg);
+ }
+
+ /* bail if we did not get an IRQ from the bus layer */
+ if (!dev->irq) {
+ printk(KERN_ERR DRIVER_NAME
+ ": No IRQ. Disabling /dev/freefall\n");
+ goto out;
+ }
+
+ if (misc_register(&lis3lv02d_misc_device))
+ printk(KERN_ERR DRIVER_NAME ": misc_register failed\n");
+out:
+ return 0;
+}
+EXPORT_SYMBOL_GPL(lis3lv02d_init_device);
+
MODULE_DESCRIPTION("ST LIS3LV02Dx three-axis digital accelerometer driver");
MODULE_AUTHOR("Yan Burman, Eric Piel, Pavel Machek");
MODULE_LICENSE("GPL");
-